KR> Manifold vacuum
Not sure if I mentioned it in here, but for IN only, it is hard to beat the open-software stratux. Less than $120 for everything. Or make it as fancy as you like. :) David Merchant On 01/29/2016 03:28 PM, Dj Merrill via KRnet wrote: > On 01/29/2016 04:20 PM, Mike Stirewalt via KRnet wrote: >> It's still early days yet in this area. Cost will be half that or less >> in another couple years. There might even currently be cheaper >> solutions. Right now I'm focussed on upgrading my navigator and >> installing an autopilot. Thanks. > > No doubt there are, and will be, other options available. I was simply > mentioning one possible option as an example, not trying to recommend > any particular solution for you. > > I'll not bother you with any further information. > > Thanks. > >
KR> Manifold vacuum
On 01/29/2016 04:20 PM, Mike Stirewalt via KRnet wrote: > It's still early days yet in this area. Cost will be half that or less > in another couple years. There might even currently be cheaper > solutions. Right now I'm focussed on upgrading my navigator and > installing an autopilot. Thanks. No doubt there are, and will be, other options available. I was simply mentioning one possible option as an example, not trying to recommend any particular solution for you. I'll not bother you with any further information. Thanks.
KR> Manifold vacuum
> "On example from Freeflight is a 978 Mhz UAT with integrated GPS for $2k. Going this approach means keeping the weight of the old Mode C transponder, antenna, and wiring, and also using up more panel space, and potential increased maintenance costs, etc." It's still early days yet in this area. Cost will be half that or less in another couple years. There might even currently be cheaper solutions. Right now I'm focussed on upgrading my navigator and installing an autopilot. Thanks. Mike SEE Citi ThankYou?? Preferred Earn 20,000 bonus ThankYou?? Points http://thirdpartyoffers.juno.com/TGL3141/56abd7d36d54657d3296cst04vuc
KR> Manifold vacuum
On 01/28/2016 01:21 PM, Mike Stirewalt via KRnet wrote: > Thanks for the suggestion DJ but at $2500 from Gulf Coast (usually the > cheapest source) I'm thinking I can find an ADS-B out solution a lot > cheaper than that. For a tiny airplane like the KR, getting rid of the old Mode C transponder and the associated weight and panel space, and replacing with an EFIS on the panel that not only can do the transponder control function but a whole lot of other things seems like an exceptional deal to me. :-) I sold my old KT76 transponder for $400 so there is at least some financial return for doing the upgrade. You still need an approved WAAS GPS position source so there is additional cost above and beyond the TT22 and GRT Mini if you don't already have something like a Garmin 430W or GNS480 in the plane. You are entirely correct that there are cheaper alternatives if you want to keep the old transponder and add a UAT for the ADS-Out. On example from Freeflight is a 978 Mhz UAT with integrated GPS for $2k. Going this approach means keeping the weight of the old Mode C transponder, antenna, and wiring, and also using up more panel space, and potential increased maintenance costs, etc. There are always trade-offs. :-) -Dj -- Dj Merrill - N1JOV - EAA Chapter 87 Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/ Glastar Flyer N866RH - http://deej.net/glastar/
KR> Manifold vacuum
> "I am using a GRT Mini as the control head for a remote mounted Trig TT22 transponder . . ." Thanks for the suggestion DJ but at $2500 from Gulf Coast (usually the cheapest source) I'm thinking I can find an ADS-B out solution a lot cheaper than that. With the TT22 we're paying a premium for it's very small size and minimal weight. That's a very nice specialized piece of kit, ideal for sailplanes. I'm thinking inexpensive ADS-B in/out solutions will be popping out of the woodwork from now until 2020 and beyond so I'm going to just bide my time and live with Mode C. In fact, having all that traffic cluttering up a moving map screen is probably more of a distraction than a help. I can easily envision it's value however - the L.A. Basin on a smoggy day for instance. I would have to cut a new panel to incorporate the GRT mini so I intend to stick with my original intent of using a portable moving map that can load approaches and talk to the ECO autopilot. (Don't think there is such a critter? Think again . . . details to follow). I'm thinking a floor mount will work well to hold a 7 - 8 inch tablet thus leaving my existing panel intact. I don't think there's enough room between the panel and my header tank for a GRT mini but even if there is enough room, I'd need to do some major surgery. My TruTrak ADI is such a nice attitude and heading instrument to fly with - don't want to tamper with that. Basically, I don't need an EFIS. If I did, I would sure be interested in the mini. Mike KSEE Travel Guard?? Insurance Travel insurance for any kind of trip http://thirdpartyoffers.juno.com/TGL3141/56aa5c78ad0505c782f7bst01vuc
KR> Manifold vacuum
On 1/27/2016 4:46 PM, Mike Stirewalt via KRnet wrote: > Folding ADS-B in/out into the navigator/autopilot system I'm envisioning > is part of this project I'm embarking on. Doing all of this at > relatively low cost and in a way that fits easily within my small cockpit > environment is an interesting project - one that appears to be quite > doable based upon the limited research I've done so far. FWIW, I am using a GRT Mini as the control head for a remote mounted Trig TT22 transponder, which supports the 1090 ES mode (ie, ADS-B Out). That's one less device to take up precious panel space. -Dj -- Dj Merrill - N1JOV - EAA Chapter 87 Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/ Glastar Flyer N866RH - http://deej.net/glastar/
KR> Manifold vacuum
And the fact that you can put in pitot and static and use it as a primary display instead of a portable backup means you can forgo the airspeed, vertical speed, and altimeter if you want. Now you have something that saves you a bunch of weight and costs not much more than the instruments it replaces. if you are going to use it as a primary instrument though you should consider upgrading to the Sport EFIS with the bigger screen. Original Message Subject: KR> Manifold vacuum From: Mike Stirewalt via KRnet List-Post: krnet@list.krnet.org Date: Wed, January 27, 2016 2:46 pm To: krnet at list.krnet.org Cc: laser147 at juno.com Brian said, > "The GRT mini is very nice also and can be used as a full blown EFIS or as a portable like the Dynon D2." I didn't even look at GRT when looking for a portable attitude instrument. I've been thinking of GRT as a supplier or large panel mount screens but I'm really out of date. The GRT mini is a far superior instrument to the Dynon and many ways, not least the fact that it " Incorporates a full AHRS solution that does not require GPS or air data to provide attitude data." That alone makes it a serious instrument, as opposed to a being a fair weather toy like the Dynon, but I'm seeing it also incorporates a database (worldwide if wanted), moving map, and tons of other features, some optional, some standard. The base unit is about the same price as the Dynon . . . so only an idiot like me would have bought the Dynon when I could have bought this for about the same money. At least the Dynon was easy to sell . . . and it did work really well for what I bought it for. It wasn't a keeper though. I'm getting ready to upgrade to a more sophisticated navigator for the KR. My Anywheremap ATC is really getting long in the tooth, plus I'm looking for a portable that can load approaches and communicate with the new TruTrak ECO autopilot I intend to buy. The GRT mini may do that - there's a lot to read regarding this unit with all of its permutations and options. Up 'till now, the only portable GPS I've found that loads full approaches plus SIDS and STARS are the ones from Aviationsafety. They used to be known as "Flight Cheetah" . . . perhaps they still are. I've got a lot more reading to do with their products as well. Folding ADS-B in/out into the navigator/autopilot system I'm envisioning is part of this project I'm embarking on. Doing all of this at relatively low cost and in a way that fits easily within my small cockpit environment is an interesting project - one that appears to be quite doable based upon the limited research I've done so far. I should have an amazing all weather travelling machine when I'm finished. Yes, a pressurized turbine-powered Lancair would be a more suitable airframe for what I have in mind, but I guess I'll just have to make do with what I've got. It's plenty good enough. Mike KSEE Ally Bank, Member FDIC Consistently competitive rates, 24/7 customer care, Member FDIC http://thirdpartyoffers.juno.com/TGL3141/56a93ae86e5533ae80ffdst04vuc ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
KR> Manifold vacuum
Brian said, > "The GRT mini is very nice also and can be used as a full blown EFIS or as a portable like the Dynon D2." I didn't even look at GRT when looking for a portable attitude instrument. I've been thinking of GRT as a supplier or large panel mount screens but I'm really out of date. The GRT mini is a far superior instrument to the Dynon and many ways, not least the fact that it " Incorporates a full AHRS solution that does not require GPS or air data to provide attitude data." That alone makes it a serious instrument, as opposed to a being a fair weather toy like the Dynon, but I'm seeing it also incorporates a database (worldwide if wanted), moving map, and tons of other features, some optional, some standard. The base unit is about the same price as the Dynon . . . so only an idiot like me would have bought the Dynon when I could have bought this for about the same money. At least the Dynon was easy to sell . . . and it did work really well for what I bought it for. It wasn't a keeper though. I'm getting ready to upgrade to a more sophisticated navigator for the KR. My Anywheremap ATC is really getting long in the tooth, plus I'm looking for a portable that can load approaches and communicate with the new TruTrak ECO autopilot I intend to buy. The GRT mini may do that - there's a lot to read regarding this unit with all of its permutations and options. Up 'till now, the only portable GPS I've found that loads full approaches plus SIDS and STARS are the ones from Aviationsafety. They used to be known as "Flight Cheetah" . . . perhaps they still are. I've got a lot more reading to do with their products as well. Folding ADS-B in/out into the navigator/autopilot system I'm envisioning is part of this project I'm embarking on. Doing all of this at relatively low cost and in a way that fits easily within my small cockpit environment is an interesting project - one that appears to be quite doable based upon the limited research I've done so far. I should have an amazing all weather travelling machine when I'm finished. Yes, a pressurized turbine-powered Lancair would be a more suitable airframe for what I have in mind, but I guess I'll just have to make do with what I've got. It's plenty good enough. Mike KSEE Ally Bank, Member FDIC Consistently competitive rates, 24/7 customer care, Member FDIC http://thirdpartyoffers.juno.com/TGL3141/56a93ae86e5533ae80ffdst04vuc
KR> Manifold vacuum
I highly recommend checking out the "stratux" open-source ADS-B -IN project. For about $110 overall (not counting batteries or power supplies) you can have in-flight weather, gps location, true AHRS (if your tablet software can use it,) and location of other ADS-B out and/or transponder equipped planes (within FAA design limits.) It is a LOT of fun! Actually works, especially in-flight weather and location of other aircraft. I test it at home a lot... David Merchant On 01/26/2016 01:35 PM, Mike Stirewalt via KRnet wrote: > Jeff said, > > "Gyros are heavy and require a vacuum source with a lot of associated > heavy plumbing. Mike Stirewalt has his Dynon D2 for sale for a very > reasonable price." > > I did have it for sale . . . but within minutes of listing it on > Vansairforce I had two buyers. I sold it to the one whose email came in > first. > > I can't recommend the Dynon D2, although it worked exceedingly well on > the recent ferry flight for which I bought it. The attitude information > it displays is dependent upon receiving a GPS signal. It has it's own > internal GPS and gyros it's true but for some inexplicable reason if it > loses a GPS signal - it happens - you lose your horizon. > > For a low-cost attitude instrument I highly recommend the TruTrak ADI. > Used ones sometime show up on eBay in the $500-600 range. They used to > make the 3 1/8" ADI which is the one I have in the KR. Currently their > ADI that looks like mine is a 2+ inch instrument, which is fine. I just > prefer the larger one. They do make a couple newer instruments which do > the same thing as their ADI but look a little different. The name Gemini > comes to mind, but check out their website. These instruments by > TruTrak, the ADI, Gemini and I think a couple others they make are > self-contained attitude instruments. They do connect to a GPS puck but > that is strictly for ground track (heading) information. > > The D2 is very smooth and usable. I liked it. However, just imagine > being totally dependent on it when in IFR conditions - cloud or on a very > dark night without any outside reference. I don't like the idea at all > of its dependency upon a GPS signal. > > Thanks Jeff. > > Mike > KSEE > > > Experience Threedom > $49.99/mo 3 years. Same great TV price. Netflix included for 1 year. > http://thirdpartyoffers.juno.com/TGL3141/56a7cad746e524ad713bbst02vuc > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options
KR> Manifold vacuum
The GRT mini is very nice also and can be used as a full blown EFIS or as a portable like the Dynon D2. I am using a GRT Sport and have been very happy with it. Original Message Subject: KR> Manifold vacuum From: Mike Stirewalt via KRnet List-Post: krnet@list.krnet.org Date: Tue, January 26, 2016 12:35 pm To: krnet at list.krnet.org Cc: laser147 at juno.com Jeff said, "Gyros are heavy and require a vacuum source with a lot of associated heavy plumbing. Mike Stirewalt has his Dynon D2 for sale for a very reasonable price." I did have it for sale . . . but within minutes of listing it on Vansairforce I had two buyers. I sold it to the one whose email came in first. I can't recommend the Dynon D2, although it worked exceedingly well on the recent ferry flight for which I bought it. The attitude information it displays is dependent upon receiving a GPS signal. It has it's own internal GPS and gyros it's true but for some inexplicable reason if it loses a GPS signal - it happens - you lose your horizon. For a low-cost attitude instrument I highly recommend the TruTrak ADI. Used ones sometime show up on eBay in the $500-600 range. They used to make the 3 1/8" ADI which is the one I have in the KR. Currently their ADI that looks like mine is a 2+ inch instrument, which is fine. I just prefer the larger one. They do make a couple newer instruments which do the same thing as their ADI but look a little different. The name Gemini comes to mind, but check out their website. These instruments by TruTrak, the ADI, Gemini and I think a couple others they make are self-contained attitude instruments. They do connect to a GPS puck but that is strictly for ground track (heading) information. The D2 is very smooth and usable. I liked it. However, just imagine being totally dependent on it when in IFR conditions - cloud or on a very dark night without any outside reference. I don't like the idea at all of its dependency upon a GPS signal. Thanks Jeff. Mike KSEE Experience Threedom $49.99/mo 3 years. Same great TV price. Netflix included for 1 year. http://thirdpartyoffers.juno.com/TGL3141/56a7cad746e524ad713bbst02vuc ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
KR> Manifold vacuum/vacuum pumps
Thank a lot to all who expressed their opinions, they are very helpful for my overall approach in using vacuum-driven instruments ! I do not intend to fly IFR but would like to enjoy the turbulence-free winter flying in Canada, which is subject to severe icing and quickly changing weather. What I know regarding the dry vacuum pumps, is that they break every 500hrs or so in my flying club C-152/C-172's, the extreme temperatures are probably contributing a lot to shorten their operating life. I will continue to explore the use of "no energy loss" vacuum but will also consider a belt-driven wet vacuum pump from automotive engine. Many of you are probably considering exhaust gases augmented cooling, venturi-assisted cooling air output ports, etc. - there is enough "energy" for a decent suction, I believe. I have been designing for many years touchscreen-enabled devices, I may probably design my own low-cost electronic AI. EFIS-simulated artificial horizon is for sure a good solution for getting out from IMC... but I have a preference for independant from electrical power solutions. By -20?C, the battery is not the best power source... Stefan Ottawa, ON, Canada s_sbal "at" hotmail.com
KR> Manifold vacuum
Jeff said, "Gyros are heavy and require a vacuum source with a lot of associated heavy plumbing. Mike Stirewalt has his Dynon D2 for sale for a very reasonable price." I did have it for sale . . . but within minutes of listing it on Vansairforce I had two buyers. I sold it to the one whose email came in first. I can't recommend the Dynon D2, although it worked exceedingly well on the recent ferry flight for which I bought it. The attitude information it displays is dependent upon receiving a GPS signal. It has it's own internal GPS and gyros it's true but for some inexplicable reason if it loses a GPS signal - it happens - you lose your horizon. For a low-cost attitude instrument I highly recommend the TruTrak ADI. Used ones sometime show up on eBay in the $500-600 range. They used to make the 3 1/8" ADI which is the one I have in the KR. Currently their ADI that looks like mine is a 2+ inch instrument, which is fine. I just prefer the larger one. They do make a couple newer instruments which do the same thing as their ADI but look a little different. The name Gemini comes to mind, but check out their website. These instruments by TruTrak, the ADI, Gemini and I think a couple others they make are self-contained attitude instruments. They do connect to a GPS puck but that is strictly for ground track (heading) information. The D2 is very smooth and usable. I liked it. However, just imagine being totally dependent on it when in IFR conditions - cloud or on a very dark night without any outside reference. I don't like the idea at all of its dependency upon a GPS signal. Thanks Jeff. Mike KSEE Experience Threedom $49.99/mo 3 years. Same great TV price. Netflix included for 1 year. http://thirdpartyoffers.juno.com/TGL3141/56a7cad746e524ad713bbst02vuc
KR> Manifold vacuum/vacuum pumps
My Mustang II vacuum pump is a purely electrical one and while I have zero flight hours on it, I'm confident enough that the engine-driven alternator supplies more than enough power. Battery has enough juice to run the engine for many minutes should the alternator die or belt slip/break. The electrical vacuum pump already has backups in the tablet running iFlyGPS for up to 8 hours and the stratux ADS-B/AHRS has it's own battery backup unit good for maybe 6 hours or more (not tested to exhaustion yet.) So the engine battery will give up first should the alternator or vacuum pump itself go out. All necessary instruments have MEMS-based backups already. Engine/prop RPM's will be controlled by the noise they make. :) David M. On 01/26/2016 10:49 AM, S via KRnet wrote: > Thank a lot to all who expressed their opinions, they are very helpful for my > overall approach in using vacuum-driven instruments ! > I do not intend to fly IFR but would like to enjoy the turbulence-free winter > flying in Canada, which is subject to severe icing and quickly changing > weather. > What I know regarding the dry vacuum pumps, is that they break every 500hrs > or so in my flying club C-152/C-172's, the extreme temperatures are probably > contributing a lot to shorten their operating life. > I will continue to explore the use of "no energy loss" vacuum but will also > consider a belt-driven wet vacuum pump from automotive engine. > Many of you are probably considering exhaust gases augmented cooling, > venturi-assisted cooling air output ports, etc. - there is enough "energy" > for a decent suction, I believe. > I have been designing for many years touchscreen-enabled devices, I may > probably design my own low-cost electronic AI. EFIS-simulated artificial > horizon is for sure a good solution for getting out from IMC... but I have a > preference for independant from electrical power solutions. By -20?C, the > battery is not the best power source... > > Stefan > Ottawa, ON, Canada > s_sbal "at" hotmail.com > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options
KR> Manifold vacuum
The theory is good. But it takes too much power to spin a vacuum pump to the rpm required to operate in the proper range. The weight of the electric motor required to produce enough power to spin a pump, and the amps required, is not worth it.?There are electric vacuum pumps on the market for certified aircraft. They are used as backup systems to get you on the ground. Heavy, high amps, expensive. The only reliable ways to power instruments is venturi, dry or wet vacuum pump, or electrical instruments.?I'm an A&P, ex corporate, cargo, charter pilot. And I do think outside the box most of the time. Have had my KR2 going for 20 years.? Sent from my Verizon Wireless 4G LTE smartphone Original message From: Mark Wegmet via KRnet List-Post: krnet@list.krnet.org Date: 01/25/2016 19:39 (GMT-05:00) To: 'KRnet' Cc: Mark Wegmet Subject: Re: KR> Manifold vacuum I encountered an interesting 'option' on a car a bought that I had "doubts" about - electric power steering. The pump is driven by an electric motor powered by the electrical system (battery) and has always worked, although the car is relatively new. Why not tie the vacuum pump into the electrical system? You may be able to tie in a low draw motor and rotary pump to drive the vacuum gages/instruments - most that I've seen don't need a lot of vacuum, so why not? -Original Message- From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Nerobro via KRnet Sent: Monday, January 25, 2016 10:17 AM To: KRnet Cc: Nerobro Subject: Re: KR> Manifold vacuum <--- not a pilot...??? Yet... Manifold vacuum isn't something I'd depend on.? As engine load goes up, manifold vacuum goes down.? I'd worry about instruments getting good vacuum on climbout.? If the engine cuts out, your manifold vacuum will drop as well (even if the prop windmills).? Using exhaust to produce vacuum is interesting too, I bet it would work, but I doubt you'd get good vacuum with the engine windmilling. I suppose i'm making the argument for a vacuum horn, or an engine driven vacuum pump, and am assuming the engine will windmill. On Mon, Jan 25, 2016 at 9:55 AM, Jeff Scott via KRnet wrote: > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to > KRnet-leave at list.krnet.org please see other KRnet info at > http://www.krnet.org/info.html see > http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options > ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
KR> Manifold vacuum
Using the vacuum from the intake manifold is something that used to be installed as an aftermarket *EMERGENCY*?suction source for some light aircraft. However, it should be noted that it was for emergency use only, with good reason. Your vacuum instruments are labeled as requiring 4-1/2 - 5 inches of suction to work properly. Generally speaking, they will work OK on 3-1/2" of suction (2-1/2" suction for T&B only). Now think about the throttle setting and manifold pressure you use when flying your aircraft. At full throttle, your manifold pressure is the same as ambient pressure, so there is no vacuum to be sourced at the manifold. So your vacuum instruments will spin up while you are throttled back during your run up, but will be spinning down while at full throttle during take off and climb. Now, let's think about cruising at 7500'. You would nominally have ~23" manifold pressure at full throttle at 7500'. In order to generate 3-1/2" of suction for the gyros, you would have to throttle back substantially to 19-1/2" manifold pressure. It is a very rare day that I actually throttle my KR back far enough to have 3 - 4 " of manifold pressure available to be used as a source to operate gyros. Additionally, the air that moves through the gyros is going into the intake manifold. That is a huge air leak into the intake system. It not only substantially leans the mixture, possibly more than you can compensate with the mixture control, but unless that vacuum leak is dead center in the manifold, it is likely to cause one cylinder to run extremely lean, likely causing valve damage by extended operations under those conditions. One solution I've seen on a certificated plane was to mount venturies on the bottom of the plane just aft of the engine in the slipstream of engine cooling air. The venturies are then running in already disturbed air, and are not prone to freezing in icing conditions, although I can't imagine why one would fly their KR in icing conditions anyway. Venturies will still generate drag, but Not as much as out in the undisturbed slip stream, and would be a much safer system than creating a large vacuum leak in the intake manifold, then planning to operate at partial throttle to keep the gyros spinning. Gyros are heavy and require a vacuum source with a lot of associated heavy plumbing. Mike Styrewalt has his Dynon D2 for sale for a very reasonable price. That weighs next to nothing and requires almost nothing in the way of power while replacing all three gyros.? There's a reason why mechanics are giving away perfectly functional gyro instruments. -Jeff Scott Los Alamos, NM ? -- Hi, Is there anybody on the list having experience with a vacuum for gyro/turn-bank supply generated by the carburetor throttle? If yes, could you please share it. FYI, I found this interesting reference: http://cybra.p.lodz.pl/Content/6351/AER_56_6.pdf Stefan s_sbal "at" hotmail.com
KR> Manifold vacuum
Or go the obvious route and get a small low cost EFIS and sell your vacuum instruments to someone with a certified plane, love for round gauges, or fear of new technology. Original Message Subject: Re: KR> Manifold vacuum From: Gary Hinkle via KRnet List-Post: krnet@list.krnet.org Date: Mon, January 25, 2016 7:22 pm To: KRnet Cc: Gary Hinkle The theory is good. But it takes too much power to spin a vacuum pump to the rpm required to operate in the proper range. The weight of the electric motor required to produce enough power to spin a pump, and the amps required, is not worth it. There are electric vacuum pumps on the market for certified aircraft. They are used as backup systems to get you on the ground. Heavy, high amps, expensive. The only reliable ways to power instruments is venturi, dry or wet vacuum pump, or electrical instruments. I'm an A&P, ex corporate, cargo, charter pilot. And I do think outside the box most of the time. Have had my KR2 going for 20 years. Sent from my Verizon Wireless 4G LTE smartphone Original message From: Mark Wegmet via KRnet List-Post: krnet@list.krnet.org Date: 01/25/2016 19:39 (GMT-05:00) To: 'KRnet' Cc: Mark Wegmet Subject: Re: KR> Manifold vacuum I encountered an interesting 'option' on a car a bought that I had "doubts" about - electric power steering. The pump is driven by an electric motor powered by the electrical system (battery) and has always worked, although the car is relatively new. Why not tie the vacuum pump into the electrical system? You may be able to tie in a low draw motor and rotary pump to drive the vacuum gages/instruments - most that I've seen don't need a lot of vacuum, so why not? -Original Message- From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Nerobro via KRnet Sent: Monday, January 25, 2016 10:17 AM To: KRnet Cc: Nerobro Subject: Re: KR> Manifold vacuum <--- not a pilot...Yet... Manifold vacuum isn't something I'd depend on. As engine load goes up, manifold vacuum goes down. I'd worry about instruments getting good vacuum on climbout. If the engine cuts out, your manifold vacuum will drop as well (even if the prop windmills). Using exhaust to produce vacuum is interesting too, I bet it would work, but I doubt you'd get good vacuum with the engine windmilling. I suppose i'm making the argument for a vacuum horn, or an engine driven vacuum pump, and am assuming the engine will windmill. On Mon, Jan 25, 2016 at 9:55 AM, Jeff Scott via KRnet > wrote: > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to > KRnet-leave at list.krnet.org please see other KRnet info at > http://www.krnet.org/info.html see > http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options > ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
KR> Manifold vacuum
I encountered an interesting 'option' on a car a bought that I had "doubts" about - electric power steering. The pump is driven by an electric motor powered by the electrical system (battery) and has always worked, although the car is relatively new. Why not tie the vacuum pump into the electrical system? You may be able to tie in a low draw motor and rotary pump to drive the vacuum gages/instruments - most that I've seen don't need a lot of vacuum, so why not? -Original Message- From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Nerobro via KRnet Sent: Monday, January 25, 2016 10:17 AM To: KRnet Cc: Nerobro Subject: Re: KR> Manifold vacuum <--- not a pilot...Yet... Manifold vacuum isn't something I'd depend on. As engine load goes up, manifold vacuum goes down. I'd worry about instruments getting good vacuum on climbout. If the engine cuts out, your manifold vacuum will drop as well (even if the prop windmills). Using exhaust to produce vacuum is interesting too, I bet it would work, but I doubt you'd get good vacuum with the engine windmilling. I suppose i'm making the argument for a vacuum horn, or an engine driven vacuum pump, and am assuming the engine will windmill. On Mon, Jan 25, 2016 at 9:55 AM, Jeff Scott via KRnet wrote: > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to > KRnet-leave at list.krnet.org please see other KRnet info at > http://www.krnet.org/info.html see > http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options > ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
KR> Manifold vacuum
KR> Manifold vacuum
Pretty much any diesel vehicle has some sort of vac pump... After all they never have manifold vacuum. On Jan 25, 2016 9:32 AM, "tinyauto--- via KRnet" wrote: > > Looks like VW/Audi and Volvo had there pumps also. Not all are what I > could call cheap. Quick look at ebay has new piston pump style ones at > $200-$300ish and the rotary style European car style ones are used for > $25-$75ish. I don't know what the specs are on each of these, but > interesting to know such a device exists. > > Kevin Golden > Streak Shadow, etc. > Harrisonville, MO > > > > -Original Message- > From: david via KRnet > To: KRnet > Cc: david > Sent: Mon, Jan 25, 2016 10:54 am > Subject: Re: KR> Manifold vacuum > > The electric vacuum pumps (for the brakes) from the mid-90's 'Vettes are > about the best out there. I put one on my Mustang II. Very durable. > Not too expensive. > > David M. > > > > > On 01/25/2016 10:41 AM, Dave Acklam via KRnet wrote: > > Use 12v vac pump?? > > > > Manifold pressure isn't a constant enough source > > On Jan 25, 2016 4:35 AM, "S via KRnet" wrote: > > > >>> It was a very long time ago. The engine was a Type 1 VW, and the carb > >> was > >>> probably a POSA. If there was any mixture control, it had to be > manual. > >>> > >> Thank you Dan ! > >> I got a full set of vaccum instruments from a very friendly aircraft > >> mechanic and I am exploring the best way to supply them, preferably > without > >> the use of draggy and icing-prone external venturi. > >> I may try to use some sort of combined manifold vacuum/exhaust venturi > to > >> create enough vacuum in all flight conditions. > >> > >> Stefan > >> s_sbal "at" hotmail.com > >> > >> ___ > >> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > >> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > >> please see other KRnet info at http://www.krnet.org/info.html > >> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to > change > >> options > >> > > ___ > > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > > please see other KRnet info at http://www.krnet.org/info.html > > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to > change options > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
KR> Manifold vacuum
Put the draggy venturi tube inside the cowl. Warm air exiting the cowl will keep it from icing, Virg On 1/25/2016 11:16 AM, Nerobro via KRnet wrote: > <--- not a pilot...Yet... > > Manifold vacuum isn't something I'd depend on. As engine load goes up, > manifold vacuum goes down. I'd worry about instruments getting good vacuum > on climbout. If the engine cuts out, your manifold vacuum will drop as > well (even if the prop windmills). Using exhaust to produce vacuum is > interesting too, I bet it would work, but I doubt you'd get good vacuum > with the engine windmilling. > > I suppose i'm making the argument for a vacuum horn, or an engine driven > vacuum pump, and am assuming the engine will windmill. > > On Mon, Jan 25, 2016 at 9:55 AM, Jeff Scott via KRnet list.krnet.org> > wrote: > >> >> ___ >> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. >> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org >> please see other KRnet info at http://www.krnet.org/info.html >> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change >> options >> > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
KR> Manifold vacuum
Looks like VW/Audi and Volvo had there pumps also. Not all are what I could call cheap. Quick look at ebay has new piston pump style ones at $200-$300ish and the rotary style European car style ones are used for $25-$75ish. I don't know what the specs are on each of these, but interesting to know such a device exists. Kevin Golden Streak Shadow, etc. Harrisonville, MO -Original Message- From: david via KRnet To: KRnet Cc: david Sent: Mon, Jan 25, 2016 10:54 am Subject: Re: KR> Manifold vacuum The electric vacuum pumps (for the brakes) from the mid-90's 'Vettes are about the best out there. I put one on my Mustang II. Very durable. Not too expensive. David M. On 01/25/2016 10:41 AM, Dave Acklam via KRnet wrote: > Use 12v vac pump?? > > Manifold pressure isn't a constant enough source > On Jan 25, 2016 4:35 AM, "S via KRnet" wrote: > >>> It was a very long time ago. The engine was a Type 1 VW, and the carb >> was >>> probably a POSA. If there was any mixture control, it had to be manual. >>> >> Thank you Dan ! >> I got a full set of vaccum instruments from a very friendly aircraft >> mechanic and I am exploring the best way to supply them, preferably without >> the use of draggy and icing-prone external venturi. >> I may try to use some sort of combined manifold vacuum/exhaust venturi to >> create enough vacuum in all flight conditions. >> >> Stefan >> s_sbal "at" hotmail.com >> >> ___ >> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. >> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org >> please see other KRnet info at http://www.krnet.org/info.html >> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change >> options >> > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
KR> Manifold vacuum
I think I like the idea of an electric vacuum pump. It's easy to have a backup, and keeps working even when the engine doesn't. On Mon, Jan 25, 2016 at 10:41 AM, Dave Acklam via KRnet < krnet at list.krnet.org> wrote: > Use 12v vac pump?? > > Manifold pressure isn't a constant enough source > On Jan 25, 2016 4:35 AM, "S via KRnet" wrote: > > > > > > > It was a very long time ago. The engine was a Type 1 VW, and the carb > > was > > > probably a POSA. If there was any mixture control, it had to be > manual. > > > > > Thank you Dan ! > > I got a full set of vaccum instruments from a very friendly aircraft > > mechanic and I am exploring the best way to supply them, preferably > without > > the use of draggy and icing-prone external venturi. > > I may try to use some sort of combined manifold vacuum/exhaust venturi to > > create enough vacuum in all flight conditions. > > > > Stefan > > s_sbal "at" hotmail.com > > > > ___ > > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > > please see other KRnet info at http://www.krnet.org/info.html > > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to > change > > options > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
KR> Manifold vacuum
The electric vacuum pumps (for the brakes) from the mid-90's 'Vettes are about the best out there. I put one on my Mustang II. Very durable. Not too expensive. David M. On 01/25/2016 10:41 AM, Dave Acklam via KRnet wrote: > Use 12v vac pump?? > > Manifold pressure isn't a constant enough source > On Jan 25, 2016 4:35 AM, "S via KRnet" wrote: > >>> It was a very long time ago. The engine was a Type 1 VW, and the carb >> was >>> probably a POSA. If there was any mixture control, it had to be manual. >>> >> Thank you Dan ! >> I got a full set of vaccum instruments from a very friendly aircraft >> mechanic and I am exploring the best way to supply them, preferably without >> the use of draggy and icing-prone external venturi. >> I may try to use some sort of combined manifold vacuum/exhaust venturi to >> create enough vacuum in all flight conditions. >> >> Stefan >> s_sbal "at" hotmail.com >> >> ___ >> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. >> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org >> please see other KRnet info at http://www.krnet.org/info.html >> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change >> options >> > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options
KR> Manifold vacuum
My Bellanca super Viking had one instrument to the intake manifold in for emergency only. Full throttle I had almost no vacuum. Only drove my turn and bank. Not enough constant vacuum on your intake. Most airplanes with a full set of instruments requires 5 inches minimum. Sent from my iPhone > On Jan 25, 2016, at 10:41 AM, Dave Acklam via KRnet > wrote: > > Use 12v vac pump?? > > Manifold pressure isn't a constant enough source > On Jan 25, 2016 4:35 AM, "S via KRnet" wrote: > >>> >>> It was a very long time ago. The engine was a Type 1 VW, and the carb >> was >>> probably a POSA. If there was any mixture control, it had to be manual. >> Thank you Dan ! >> I got a full set of vaccum instruments from a very friendly aircraft >> mechanic and I am exploring the best way to supply them, preferably without >> the use of draggy and icing-prone external venturi. >> I may try to use some sort of combined manifold vacuum/exhaust venturi to >> create enough vacuum in all flight conditions. >> >> Stefan >> s_sbal "at" hotmail.com >> >> ___ >> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. >> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org >> please see other KRnet info at http://www.krnet.org/info.html >> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change >> options > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options
KR> Manifold vacuum
Since I use a distributor instead of a mag, I installed a vacuum pump were the mag mounts. Made a drive that bolted on. Has worked for over 500hrs with no issues. Sent from my Verizon Wireless 4G LTE smartphone Original message From: S via KRnet List-Post: krnet@list.krnet.org Date: 01/25/2016 07:34 (GMT-05:00) To: KRnet Cc: S Subject: Re: KR> Manifold vacuum > > It was a very long time ago.? The engine was a Type 1 VW, and the carb was > probably a POSA.? If there was any mixture control, it had to be manual. > Thank you Dan ! I got a full set of vaccum instruments from a very friendly aircraft mechanic and I am exploring the best way to supply them, preferably without the use of draggy and icing-prone external venturi. I may try to use some sort of combined manifold vacuum/exhaust venturi to create enough vacuum in all flight conditions. Stefan s_sbal "at" hotmail.com?? ?? ? ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
KR> Manifold vacuum
<--- not a pilot...Yet... Manifold vacuum isn't something I'd depend on. As engine load goes up, manifold vacuum goes down. I'd worry about instruments getting good vacuum on climbout. If the engine cuts out, your manifold vacuum will drop as well (even if the prop windmills). Using exhaust to produce vacuum is interesting too, I bet it would work, but I doubt you'd get good vacuum with the engine windmilling. I suppose i'm making the argument for a vacuum horn, or an engine driven vacuum pump, and am assuming the engine will windmill. On Mon, Jan 25, 2016 at 9:55 AM, Jeff Scott via KRnet wrote: > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
KR> Manifold vacuum
Use 12v vac pump?? Manifold pressure isn't a constant enough source On Jan 25, 2016 4:35 AM, "S via KRnet" wrote: > > > > It was a very long time ago. The engine was a Type 1 VW, and the carb > was > > probably a POSA. If there was any mixture control, it had to be manual. > > > Thank you Dan ! > I got a full set of vaccum instruments from a very friendly aircraft > mechanic and I am exploring the best way to supply them, preferably without > the use of draggy and icing-prone external venturi. > I may try to use some sort of combined manifold vacuum/exhaust venturi to > create enough vacuum in all flight conditions. > > Stefan > s_sbal "at" hotmail.com > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
KR> Manifold vacuum
> > It was a very long time ago. The engine was a Type 1 VW, and the carb was > probably a POSA. If there was any mixture control, it had to be manual. > Thank you Dan ! I got a full set of vaccum instruments from a very friendly aircraft mechanic and I am exploring the best way to supply them, preferably without the use of draggy and icing-prone external venturi. I may try to use some sort of combined manifold vacuum/exhaust venturi to create enough vacuum in all flight conditions. Stefan s_sbal "at" hotmail.com
KR> Manifold vacuum
It was a very long time ago. The engine was a Type 1 VW, and the carb was probably a POSA. If there was any mixture control, it had to be manual. See N64KR at http://KRBuilder.org - Then click on the pics? 2015 KR Gathering - McMinnville, OR. September 3 - 6 -- See U There. Peoples Choice at 2013 - KR Gathering in Mt. Vernon, Il ? MVN Best KR at 2013 - KR Gathering in Mt. Vernon, Il ? MVN Best Interior at 2013 - KR Gathering in Mt. Vernon, Il ? MVN Best Paint at 2013 - KR Gathering in Mt. Vernon, Il ? MVN Best Firwwall Forward at 2013 - KR Gathering in Mt. Vernon, Il ? MVN Best Interior and Panel at 2008 ? KR Gathering in Mt. Vernon, Il - MVN Daniel R. Heath -?Lexington, SC -Original Message- From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of S via KRnet Sent: Saturday, January 23, 2016 11:02 AM To: KRnet Cc: S Subject: Re: KR> Manifold vacuum > I knew a KR that did that. The issue with doing that, is that it > changes the mixture. Thank you, Dan ! Do you recall what engine and carb (automatic or manual mixture) was used ? Stefan Otawa, ON, Canada s_sbal "at" hotmail.com ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
KR> Manifold vacuum
> I knew a KR that did that. The issue with doing that, is that it changes > the mixture. Thank you, Dan ! Do you recall what engine and carb (automatic or manual mixture) was used ? Stefan Otawa, ON, Canada s_sbal "at" hotmail.com
KR> Manifold vacuum
I knew a KR that did that. The issue with doing that, is that it changes the mixture. See N64KR at <http://krbuilder.org/> http://KRBuilder.org - Then click on the pics 2015 KR Gathering - McMinnville, OR. September 3 - 6 -- See U There. Peoples Choice at 2013 - KR Gathering in Mt. Vernon, Il - MVN Best KR at 2013 - KR Gathering in Mt. Vernon, Il - MVN Best Interior at 2013 - KR Gathering in Mt. Vernon, Il - MVN Best Paint at 2013 - KR Gathering in Mt. Vernon, Il - MVN Best Firwwall Forward at 2013 - KR Gathering in Mt. Vernon, Il - MVN Best Interior and Panel at 2008 - KR Gathering in Mt. Vernon, Il - MVN Daniel R. Heath - Lexington, SC -Original Message- Subject: KR> Manifold vacuum Hi, Is there anybody on the list having experience with a vacuum for gyro/turn-bank supply generated by the carburetor throttle? If yes, could you please share it.
KR> Manifold vacuum
Hi, Is there anybody on the list having experience with a vacuum for gyro/turn-bank supply generated by the carburetor throttle? If yes, could you please share it. FYI, I found this interesting reference: http://cybra.p.lodz.pl/Content/6351/AER_56_6.pdf Stefan s_sbal "at" hotmail.com
