KR> KR performance numbers
Larry, When I had my KR-1 (around 400# e.w.), I came pretty close to the takeoff and landing performance as advertised (1700 cc VW), but certainly not anywhere close to 180 mph cruise (125-135 cruise). Ed Janssen Along the same lines, I sure wish someone would fess up and give the "REAL" performance numbers in advertising the KR aircraft. Takeoff in 350 feet, land in 650 feet, 180 mph cruise, really? Really.??? I've been to 25 of the last 26 KR Gatherings and have yet to witness such awesome performance. Larry Flesner
KR> KR performance numbers
Larry, When I had my KR-1 (around 400# e.w.), I came pretty close to the takeoff and landing performance as advertised (1700 cc VW), but certainly not anywhere close to 180 mph cruise (125-135 cruise). Ed Janssen Along the same lines, I sure wish someone would fess up and give the "REAL" performance numbers in advertising the KR aircraft. Takeoff in 350 feet, land in 650 feet, 180 mph cruise, really? Really.??? I've been to 25 of the last 26 KR Gatherings and have yet to witness such awesome performance. Larry Flesner
KR> Performance numbers, and details on N455JS
Greg Nerobro wrote: > I was reading through some archives, and ran across pictures of N455JS. So I did some digging. ... and found almost nothing. I want to know more. John Shaffer is still around. He flies his plane to the Gatherings sometimes. I have his email address at home, and will try to dig it up and send it your way this weekend. I'm sure he'd be happy to tell you the details. There are some detailed photos of his gear setup at the 2003 Red Oak Gathering, at http://www.krnet.org/redoak2003/ . I think there are even drawings of his gear or something similar in the old KR Newsletters. Some photos I took of him flying are at http://www.krnet.org/mvn2004 , http://www.krnet.org/mvn2004/040929348.jpg , is one of them showing how the gear stows. Mark Langford, Harvest, AL ML at N56ML.com www.N56ML.com
KR> Performance numbers, and details on N455JS
Does anyone have contact information for the builder? I'm still interested in any information on the plane. On Sat, Jul 12, 2014 at 2:38 AM, Nerobro via KRnet wrote: > I was reading through some archives, and ran across pictures of N455JS. > > So I did some digging. ... and found almost nothing. I want to know more. > > > I would love to see more details on it's retracts. Are they manual? > Electric? Hydraulic? How do they lock? do they lock up? do they lock > down? Do they have suspension built into them? > > I'd also like to know what sort of performance N455JS gets, and on what > engine? > > It looks great. :-) But it also looks heavy, so I wonder where that > balances out on the performance side of things. > > Thanks Everyone. > > Greg "Nerobro" > Northlake, IL > ___ > 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> Performance numbers, and details on N455JS
I was reading through some archives, and ran across pictures of N455JS. So I did some digging. ... and found almost nothing. I want to know more. I would love to see more details on it's retracts. Are they manual? Electric? Hydraulic? How do they lock? do they lock up? do they lock down? Do they have suspension built into them? I'd also like to know what sort of performance N455JS gets, and on what engine? It looks great. :-) But it also looks heavy, so I wonder where that balances out on the performance side of things. Thanks Everyone. Greg "Nerobro" Northlake, IL
KR> performance numbers?
Larry I beleive you answered your own question when you said 70hp at 2300 rpm. I think that is close to correct. Question is what about cruise speed? I have a 0200 that I will be installing on my KR2S that I removed from my Citabria, I was using a 69X48 McCaully prop. I could get 2610 RPM static, 2700 90 mph climb, 2750 redline 120mph cruise. The way I understand it the higher the expected cruise speed the shorter the prop needs to be, but at the same time it needs more angle. I wonder if you could ask Ed Sturba about shortning your prop about 2" to get your RPM up since that last 2" is probably what the hardest for your engine to turn. If you would like to experament with my 69 by 48 your are welcome. It also has a bulk head and 9" spinner. Jim Raleigh - Original Message - From: "Larry&Sallie Flesner" To: "KRnet" Sent: Wednesday, November 23, 2005 5:30 AM Subject: KR> performance numbers? > > > > > The numbers are indicated. But i believe they are very close. > > > >Joe Horton > > +++ > > When I posted I forgot you have the 3100 ci engine. You may well be > pulling 80 to 100 hp on climb out while I'm lucky to be getting > 70 hp on climb out at 2300 to 2400 rpm. A friend of mine has a > 62X49 Sensenich prop that I'm tempted to try just to see what some > extra hp on takeoff and climb would do. I'm running a Sterba 60X64 > so the 62X49 ought to let me turn up considerable rpm but will really > kill my cruise numbers I suspect. I sure wish Santa could bring me > a constant speed prop for Christmas. :-) > > Larry Flesner > > > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
KR> performance numbers?
> I have a 0200 that I will be installing on my KR2S that I removed >from my Citabria, I was using a 69X48 McCaully prop. I could get 2610 RPM >static, 2700 90 mph climb, 2750 redline 120mph cruise. The way I understand >it the higher the expected cruise speed the shorter the prop needs to be, >but at the same time it needs more angle >Jim Raleigh ++ Jim, I didn't realize they ever ran an 0-200 in a Citabria. Anyway, according to the chart in Tony Bingelis' book " Firewall Forward", 2750 rpm with a 48 inch pitch prop at 90% efficiency would put you right in the 120 mph range. My 64 inch pitch prop at 2700 rpm puts me in the 160 mph cruise range which is pretty close to where I'm at. More diameter is good as you will see in the notes below but with increased diameter comes increased tip speed and TOO MUCH of that is not good. An interesting note on one of his formulas, with my 64 inch pitch prop at 90% efficiency and 2800 rpm I should only be getting 153 mph. Three possibilities: A. my prop is more than 90% efficient. B. I'm turning 2800+rpm C. I actually have more than 64 inch pitch in the prop. I'm guessing it's voo doo science at work. :-) See notes below. Larry Flesner Some notes on propellers from the same book: The speed of sound at sea level is 741 mph (approx 1,100 fps) The tip speed of a propeller should not exceed the speed of sound. . Above a tip speed of approx 850fps (950fps for metal props) propellers suffer a loss of efficiency and produce a marked increase in noise level. A blade angle change of one degree will change the engine speed approx 50 to 100 rpm. Additionally, clipping one inch off the diameter (1/2 inch on each end) will cause an increase in engine speed of 50 to 100 rpm. About static rpm, (aircraft stationary on the ground with throttle wide open) a propeller should allow an engine to turn approx 80 percent of it's rated rpm. Your propeller's efficiency increases as the airspeed increases. It also increases with additional diameter - up to the critical tip speed range (speed of sound). Propeller efficiency is rarely above 90%.
KR> performance numbers?
> If you would like >to experament with my 69 by 48 your are welcome. It also has a bulk head >and 9" spinner. Jim Raleigh +++ Jim, Thanks for the offer. I'm inclined to pass for now. A friend of mine has a Sensenich (sp?) 62X49 that I may try soon just to see what happens. ( I'm running a Sterba 60X64 right now) It should take off and climb like a bandit but I'd have to watch my rpm in cruise. It would be interesting though. Larry flesner
KR> performance numbers?
Larry Flesner wrote: > A friend of mine > has a Sensenich (sp?) 62X49 that I may try soon just to see what > happens. ( I'm running a Sterba 60X64 right now) It should take off > and climb like a bandit but I'd have to watch my rpm in cruise. It would > be interesting though. There's a huge gap between Sterba's numbering system and Sensenich's. I'll bet there's not nearly as much difference in those two as you might expect. Try it, you might like it. It might do everything better... Mark Langford, Harvest, AL see homebuilt airplane at http://www.N56ML.com email to N56ML "at" hiwaay.net
KR> performance numbers?
Larry wrote that he is getting a higher cruise speed than predicted from his prop. Remember that a certain amount of slippage is expected when predicting a props cruise speed. The more aerodynamically slippery you craft is then the easier it for the prop to pull you thru the air and the less slippage you have, - Original Message - From: "Mark Langford" To: "KRnet" Sent: Monday, December 12, 2005 9:18 PM Subject: Re: KR> performance numbers? > Larry Flesner wrote: > > > A friend of mine > > has a Sensenich (sp?) 62X49 that I may try soon just to see what > > happens. ( I'm running a Sterba 60X64 right now) It should take off > > and climb like a bandit but I'd have to watch my rpm in cruise. It would > > be interesting though. > > There's a huge gap between Sterba's numbering system and Sensenich's. I'll > bet there's not nearly as much difference in those two as you might expect. > Try it, you might like it. It might do everything better... > > Mark Langford, Harvest, AL > see homebuilt airplane at http://www.N56ML.com > email to N56ML "at" hiwaay.net > > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
KR> performance numbers?
Someone does make one for the O-200 and there is a plugged hole in the crank for the oil controlled prop. I have a friend that is going to use one on his Midget Mustang. I will ask him what brand and how much it is. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -Original Message- From: krnet-bounces+brian.kraut=engalt@mylist.net [mailto:krnet-bounces+brian.kraut=engalt@mylist.net]On Behalf Of Orma Sent: Wednesday, November 23, 2005 7:22 AM To: KRnet Subject: Re: KR> performance numbers? I sure wish Santa could bring me a constant speed prop for Christmas. :-) Larry does anyone make one for the O-200??? Orma ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> performance numbers?
Turns out that my friend was going to use the Ivo prop on the O-200. I know about your luck with the Ivo. I'll see if any of the other people on the Midget Mustang group know of another brand available. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -Original Message- From: krnet-bounces+brian.kraut=engalt@mylist.net [mailto:krnet-bounces+brian.kraut=engalt@mylist.net]On Behalf Of Orma Sent: Wednesday, November 23, 2005 7:22 AM To: KRnet Subject: Re: KR> performance numbers? I sure wish Santa could bring me a constant speed prop for Christmas. :-) Larry does anyone make one for the O-200??? Orma ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> performance numbers?
> >58" x 64 Sterba prop > The numbers: >normal climb-90 mph indicated-- 1200'/min >best angle climb-- 80 mph -- 1500'/min >75%power cruise -- 2800 rpm-- 145mph >WOT--3150 rpm--170mph >cruse climb-- 2800 rpm--700'/m >Joe Horton ++ Joe, Are your climb numbers measured or indicated on a VSI ? The reason I ask is that you Corvair fliers seem to get better climb performance than my 0-200. I'm talking anywhere from 200 to 700 feet. I'm running a 60X64 Sterba prop and I'll get 800 fpm climb max but I still get 170mph the same as you in cruise at 2650 rpm. I know I'm not getting the hp out of my engine on climbout (2350 - 2400 rpm) but a 50% better climb rate is hard to fathom. You Corvair fliers are all running the new wing , I think, and I'm running a stock KR wing but the numbers difference is hard for me to believe. Larry Flesner
KR> performance numbers?
Larry Flesner wrote: >The reason I ask is that you Corvair fliers seem to get better climb performance than my 0-200. < I've been using a stopwatch lately to time my climbs, and I've been getting an average of almost 1000'/min with full fuel, and that's an average from ground (700') to 10,000' or so. And I don't have gap seals yet. I'm not sure how much gap seals will do for me, since my ailerons and flaps are pretty tightly gapped, but for Troy (who used the wide open wedge design from the plans for his ailerons) seals made a huge improvement. Speaking of wings, I changed something last night that should make a difference in my aileron feel. I have a "heavy left wing", caused by the fact that I'm sitting on the left side, mostly, and maybe also because I have more cusp underneath the left aileron than the right (none). I had stuck some balsa RC model "trailing edge" wedges under the right aileron to jack it up during flight. That wasn't very smart, in retrospect, because I was now forcing BOTH ailerons up. Last night I removed the wedges from the bottom of the right aileron and added an aluminum tab to the top of the left aileron, so now I'm forcing the left aileron down, rather the right aileron up. This ought to lessen control forces a little, and remove some unnecessary force from the aileron control system. I also finished up the cabin heat muff and valve, so I should have cabin heat now (and yes, I also installed a CO detector). My Terra 760D radio should be back today, with a clean bill of health. Nothing wrong with it after all. I checked all the wiring last night and there's nothing funny there either. My guess is that an aluminum chip got in there and shorted across a chip's legs and created a sort of "brown out". Unlikely, you say? The day before I flew it to Daytona Beach, I drilled 4 holes in my panel to mount the big GPS remote display. There's a little 1/4" hole for sidetone adjustment located about 4" from the holes I drilled, right in the top of the radio. The drill would have funneled the chips right over that hole. I blew the thing out before I shipped off to the shop to have it repaired (suspecting something like that), but neglected to check it to see if it worked after that. Du.. Looks like daughter Claire will get her first KR ride Thursday, to a family reuninon in South Alabama. The weather's supposed to be pretty decent. 30 mph gusts today though... Mark Langford, Huntsville, Alabama see KR2S project N56ML at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net
KR> performance numbers?
speaking of co sensors i have been told by a gas engineer that those liitle spots that turn a different colour are not so good they sem to lag behind what is going on some years back had a nasty escape with co soem tiny gaps underneath the wing -meant even though exhaust was outletting aft of those gaps that co managed to get in went nearly unconsious p - Original Message - From: "Mark Langford" To: "KRnet" Sent: Tuesday, November 22, 2005 1:20 PM Subject: Re: KR> performance numbers? > Larry Flesner wrote: > > >The reason I ask is that you Corvair fliers seem to get > better climb performance than my 0-200. < > > I've been using a stopwatch lately to time my climbs, and I've been getting > an average of almost 1000'/min with full fuel, and that's an average from > ground (700') to 10,000' or so. And I don't have gap seals yet. I'm not > sure how much gap seals will do for me, since my ailerons and flaps are > pretty tightly gapped, but for Troy (who used the wide open wedge design > from the plans for his ailerons) seals made a huge improvement. > > Speaking of wings, I changed something last night that should make a > difference in my aileron feel. I have a "heavy left wing", caused by the > fact that I'm sitting on the left side, mostly, and maybe also because I > have more cusp underneath the left aileron than the right (none). I had > stuck some balsa RC model "trailing edge" wedges under the right aileron to > jack it up during flight. That wasn't very smart, in retrospect, because I > was now forcing BOTH ailerons up. Last night I removed the wedges from the > bottom of the right aileron and added an aluminum tab to the top of the left > aileron, so now I'm forcing the left aileron down, rather the right aileron > up. This ought to lessen control forces a little, and remove some > unnecessary force from the aileron control system. > > I also finished up the cabin heat muff and valve, so I should have cabin > heat now (and yes, I also installed a CO detector). My Terra 760D radio > should be back today, with a clean bill of health. Nothing wrong with it > after all. I checked all the wiring last night and there's nothing funny > there either. My guess is that an aluminum chip got in there and shorted > across a chip's legs and created a sort of "brown out". Unlikely, you say? > The day before I flew it to Daytona Beach, I drilled 4 holes in my panel to > mount the big GPS remote display. There's a little 1/4" hole for sidetone > adjustment located about 4" from the holes I drilled, right in the top of > the radio. The drill would have funneled the chips right over that hole. I > blew the thing out before I shipped off to the shop to have it repaired > (suspecting something like that), but neglected to check it to see if it > worked after that. Du.. > > Looks like daughter Claire will get her first KR ride Thursday, to a family > reuninon in South Alabama. The weather's supposed to be pretty decent. 30 > mph gusts today though... > > Mark Langford, Huntsville, Alabama > see KR2S project N56ML at http://home.hiwaay.net/~langford > email to N56ML "at" hiwaay.net > > > > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.362 / Virus Database: 267.13.4/176 - Release Date: 20/11/2005 > > I am using the free version of SPAMfighter for private users. It has removed 24549 spam emails to date. Paying users do not have this message in their emails. Try www.SPAMfighter.com for free now! -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.13.4/176 - Release Date: 20/11/2005
KR> performance numbers?
Larry, The numbers are indicated. But i believe they are very close. The GPS and the VSI agree within 50' of each other as will as the altitude and the airspeed all seem to be nearly right on. I will time things when I get more proficient. RPM's are the most suspect for accuracy and I will have that checked on the next flight. The only thing that I se for the different number in climb is the rpm you posted. At 90 mph I am turning 3000 rpm. At 80 mph it drops of to 2800 plus or minus. I had hesitated to post numbers yet because I knew that I did not have complete accuracy but I am sure they are in the ball park. Like I mentioned also my plane is completely faired and gap seals all on. So I have no way of knowing how they affect things. Joe Horton, Coopersburg, PA. joe.kr2s.buil...@juno.com > >58" x 64 Sterba prop > > The numbers: > >normal climb-90 mph indicated-- 1200'/min > >best angle climb-- 80 mph -- 1500'/min > >75%power cruise -- 2800 rpm-- 145mph > >WOT--3150 rpm--170mph > >cruse climb-- 2800 rpm--700'/m-- 130 mph > >Joe Horton > ++ > > Joe, > > Are your climb numbers measured or indicated on a VSI ? > > The reason I ask is that you Corvair fliers seem to get > better climb performance than my 0-200. I'm talking > anywhere from 200 to 700 feet. I'm running a 60X64 Sterba > prop and I'll get 800 fpm climb max but I still get 170mph the > same as you in cruise at 2650 rpm. I know I'm not getting > the hp out of my engine on climbout (2350 - 2400 rpm) but > a 50% better climb rate is hard to fathom. > > You Corvair fliers are all running the new wing , I think, and > I'm running a stock KR wing but the numbers difference is > hard for me to believe. > > Larry Flesner
KR> performance numbers?
> > The numbers are indicated. But i believe they are very close. > >Joe Horton +++ When I posted I forgot you have the 3100 ci engine. You may well be pulling 80 to 100 hp on climb out while I'm lucky to be getting 70 hp on climb out at 2300 to 2400 rpm. A friend of mine has a 62X49 Sensenich prop that I'm tempted to try just to see what some extra hp on takeoff and climb would do. I'm running a Sterba 60X64 so the 62X49 ought to let me turn up considerable rpm but will really kill my cruise numbers I suspect. I sure wish Santa could bring me a constant speed prop for Christmas. :-) Larry Flesner
KR> performance numbers?
I sure wish Santa could bring me a constant speed prop for Christmas. :-) Larry does anyone make one for the O-200??? Orma
KR> performance numbers?
Hi all just a ? that has probibly been answered befor in regards to the WAF. Has anyone used stanless steel in say marin grade stanless. I'm gesing that the stanless would be strong enought or would it need to be resized to give the same strenght as the 4130 steel. Albert. On Wed, 23 Nov 2005 07:22:07 -0500, Orma wrote > I sure wish Santa could bring me a constant speed prop for > Christmas. :-) > > Larry does anyone make one for the O-200??? > > Orma > > ___ > Search the KRnet Archives at > http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, > send a message to krnet-le...@mylist.net please see other KRnet info > at http://www.krnet.org/info.html ___ Alphalink WebMail - http://webmail.alphalink.com.au
KR> performance numbers?
At 04:22 AM 11/23/2005, you wrote: >I sure wish Santa could bring me a constant speed prop for Christmas. :-) > >Larry does anyone make one for the O-200??? John Moyle (Contact Magazine) is importing a ground single point adjustable prop that he expects shortly to have in-flight adjustable at about 16 lbs for under $2K Larry Severson Fountain Valley, CA 92708 (714) 968-9852 lar...@socal.rr.com
KR> performance numbers?
At 06:22 AM 11/23/2005, you wrote: >I sure wish Santa could bring me a constant speed prop for Christmas. :-) > >Larry does anyone make one for the O-200??? > >Orma ++ There may be but I'm sure Santa couldn't afford it ! :-) Larry Flesner
KR> performance numbers?
Please don't, it may be too soft, Virg On Thu, 24 Nov 2005 00:52:09 +1000 jo...@alphalink.com.au writes: > Hi all > just a ? that has probibly been answered befor in regards to the > WAF. > Has anyone used stanless steel in say marin grade stanless. I'm > gesing that > the stanless would be strong enought or would it need to be resized > to give > the same strenght as the 4130 steel. > > Albert. > > > > > On Wed, 23 Nov 2005 07:22:07 -0500, Orma wrote > > I sure wish Santa could bring me a constant speed prop for > > Christmas. :-) > > > > Larry does anyone make one for the O-200??? > > > > Orma > > > > ___ > > Search the KRnet Archives at > > http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from > KRnet, > > send a message to krnet-le...@mylist.net please see other KRnet > info > > at http://www.krnet.org/info.html > > > > ___ > Alphalink WebMail - http://webmail.alphalink.com.au > > > ___ > Search the KRnet Archives at > http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > Virgil N. Salisbury - AMSOIL www.lubedealer.com/salisbury Miami ,Fl
KR> performance numbers?
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KR> performance numbers?
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