KR> another apology

[John C Edwards]

most single port Hapi engines are 1835cc, like mine

On 5/20/2010 8:59 PM, Daniel Root wrote:
> This is just not my week for accuracy.  I posted a description to someone 
> regarding my HAPI engine, which included the statement that it was a dual 
> port 1835 cc.  Of course, it's a single port, and only 1600cc.  My apologies 
> to all whom I've mislead and confused.
>
> More mistakes to follow
>
> Mea Culpa,  Dan
>
>
>
>
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>
>

KR> AeroCarb 4-Sale

[John C Edwards]

I have barely used (flew with it 10hrs) 32mm AeroCarb for sale for $200 
if anyone is interested before I put it on E-Bay. Fits on most VW size 
engines.

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>

KR> Aerocarb

[John C Edwards]

I have a header tank in my KR-1 and in order to scavenge the last 3 
gallons out of the tank with enough head pressure for the Aero-Carb or 
Rev-Flow (3/4-1&1/2lbs) i installed a small adjustable pressure 
regulator just downstream from the fuel pump should I run it that low on 
fuel which I dont really plan on doing, but it is there just in case.

On 5/17/2010 10:04 PM, Mark Langford wrot
> I do know that they don't appreciate fuel pump pressure, and
> prefer gravity feed instead.  There should be plenty of info in the
> CorvAircraft archives (see
> ttp://www.maddyhome.com/corvairsrch/index.jsp  ), using the keyword
> "Aerocarb".
>
> Mark Langford
> N56ML "at" hiwaay.net
> website at http://www.N56ML.com
> 
>
>
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>

KR> Aerocarb

[John C Edwards]

>
>
>
>   and once properly adjusted, tends to stay
> that way.  I do know that they don't appreciate fuel pump pressure, and
> prefer gravity feed instead.
>
> Mark Langford
> N56ML "at" hiwaay.net
> website at http://www.N56ML.com
> 
>
>
> I flew for about 10 hrs with an AeroCarb on my KR-1 with a 1835 VW and single 
> port heads. Me and my A friend spent 50+ hrs getting it properly tuned! It 
> ran ok,but I was never happy with the uneven fuel distribution(atomization) 
> and occasional sputter that would result if I didnt have the mixture set 
> just-right.'Just-Right' was a compromise(a mixture setting) between the 
> richest and leanest running cyclinders. In the end, I opted out and installed 
> another injector type carb, the Rev-Flow version. Rev-Flow seemed to have a 
> much better engineered mixture control. With that and a home made version of 
> the Vortec/Cyclone generator in the intake manifold I am a Happy Camper and 
> egt's run much closer than before.
I have AeroCarb for sale and will let it go for $200 if anyone is 
interested...before I put it up on E-Bay.

KR> HAPI engine

[John C Edwards]

I too had a old 1835 HAPI engine on my KR-1 with 500hrs on it when I 
replaced the alternator last summer. I too found the same Scary Looking 
elongated holes on my flywheel! In retrospect, I was really glad the 
alternator failed!!!

On 5/6/2010 10:20 AM, Mark Langford wrote:
> Rich Hartwig wrote:
>
>
>> For information concerning cracking of HAPI flywheels, check the archives
>> at:
>> http://www.maddyhome.com/krsrch/search and search "HAPI flywheels"
>>  
> And the one below is pretty graphic.  I wrote this a few years ago after
> seeing Jim Hill's.
> -
> And if it has an aluminum flywheel, check out the two photos at
> http://www.krnet.org/misc/HAPI_flywheel/050917111m2.jpg and
> http://www.krnet.org/misc/HAPI_flywheel/050917111m.jpg  .  This was on Jim
> Hill's HAPI engine, and it appears to be a matter of seconds away from
> coming apart.  Steve at Great Plains also has a cure for this, I believe.
> What made it obvious was loads of end play on the crankshaft...the prop
> would move fore and aft an eighth of an inch or so, rather than the .004" or
> so it's supposed to be.
>
> Mark Langford
> n5...@hiwaay.net
> website www.n56ml.com
>
>
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>
>
>

KR> Wheels

[John C Edwards]

I have a kr-1 with the same old Rsoenhan split wheel as you describe. I 
had a flat last summer due to a safety wire that punctured the sidewall 
because I let the tire pressure get too low etc, etc.. I noticed that 
when I took it apart and patched the tube, that the original 
owner/builder had taped a light-weight piece of cardboard around the 
center of the wheel, presumably to prevent the tube from being pinched. 
13yrs later the orignal tubes are holding up fine.

On 4/14/2010 4:47 PM, Dan Heath wrote:
> I have the old Rosenhan split wheel.  It has been impossible for me to get a
> tube in it without cutting the tube by pinching it between the halves.  I
> have lightly inflated the tube, put baby powder all over everything, and
> still the tube got split.  The really bad thing about this, is that it will
> hold air and you can't know that it is not right.  So, I had to land with a
> flat tire, and got very lucky.  I don't want to count on luck any more.
>
>
>
> Does anyone know of a supply source for 11X4X5 wheels made to replace the
> old Rosenhan, now called Matco, that are made for the external hydraulic
> brake disk, that is a single piece wheel, where the tire can be put on it,
> like it is on a car.?
>
>
>
> Thank you for your time.
>
>
>
> Daniel R. Heath
>
> da...@windstream.net
>
> See N64KR at  http://KRBuilder.org - Then click on
> the pics
>
> See you at the 2010 - KR Gathering in Richmond, Ky - I39
>
>
>
>
>
>
>
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>
>

KR> Latest intake manifold experiment

[John C Edwards]

Yes icing,or condensation can and will manifest itself downstream in the 
intake manifold.  The  "T" in the intake manifold of updraft/sidedraft 
manifolds creates a high pressure area where the air/fuel mixture 
accelerates and bends as it goes around the corner and up into the two 
intake runners up to the heads like on a VW or Corvair. At that point, 
the temperature drops, and condensation or icing occurs depending on how 
close to the exhaust is the the intake manifold and what the undercowl 
temperature is at that point. Pull the lower cowling off your aircraft 
if you dont believe me on hot summer day and look at the area just aft 
of the carb where it enters the "T" of your intake manifold and you will 
see the condensation form on the outside at the very least.

On 1/30/2010 2:34 PM, samantha toner wrote:
> Icing occurs on the throttle flag due to the depression of air as it exists  
> the venturi.It wont manifest itself downstream in the manifold as the 
> pressure has equilised
> --- On Sat, 30/1/10, Dan Heath  wrote:
>
>
> From: Dan Heath
> Subject: RE: KR>  Latest intake manifold experiment
> To: "'KRnet'"
> Date: Saturday, 30 January, 2010, 12:00
>
>
> A concern that I have about that is icing.  I think that with all those very
> small wires, it would be easy for it to ice over.
>
> See N64KR at http://KRBuilder.org - Then click on the pics 
> See you at the 2010 - KR Gathering in Richmond, Ky - I39
> There is a time for building and a time for FLYING and the time for Flying
> has begun.
> Daniel R. Heath - Lexington, SC
>
> -Original Message-
>
>
> In my younger days we used to put aluminum window screening sandwiched
> between 2 carburetor spacers to help atomize fuel.
>
>
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>

KR> Latest intake manifold experiment

[John C Edwards]

I have an old 1835 Hapi engine and was having problems with uneven fuel 
distribution to different cylinders as indicated by hot and cold egt 
readings. I made a scaled down Cyclone Vortec generator of my own since 
the one theirs(Cyclone Vortec) was too big to fit in my VW intake 
manifold. It evened out the egt readings and cured the sometimes 
sputtering problem that i had,, if the mixture wasn't set just right. I 
can now run a leaner(as set by my air/fuel ratio gauge) and cooler egt's 
than before without the cyclone device. My kr-1 is now much happier with 
my Hapi engine!

On 1/29/2010 5:31 AM, da...@windstream.net wrote:
> Yes, if you have a carb with a choke on it, I would not use a primer either. 
> I have an Ellison and therefore must have a primer, or it won't start.
>
>  airgu...@comcast.net wrote:
>
> =
>
>
> I removed my primer as I was only using the choke to start.
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>
>

KR> prop spinner

[John C Edwards]

The spinner and back plate on my KR1 is off a stock Cessna 150 and it 
has held up well over the years and I currently have about 600hrs on it.
John Edwards
KR-1  n101GJ

Mark Langford wrote:
> The link to building a spinner (and front bulkhead)  is located at
> http://home.hiwaay.net/~langford/spinner/ .  It's a 10" spinner, since
> that's what most KR cowlings are designed around.
>
>
> Mark Langford
> n5...@hiwaay.net
> website www.n56ml.com
>
>
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>
>
>   

KR> HAPI Flywheels

[John C Edwards]

My 1835cc Hapi engine had the flywheel replaced when it had 500 hrs on 
it. The service bulletin which happened years before that I had not 
heard about,,,but when the alternator quit ,Steve Bennett at Great 
Plains recommended it replace the flywheel too. I did not know why until 
I pulled off the flywheel.
All 4 dowel pins holes were SEVERELY ELONGATED and surely would have 
failed soon! In retrospect I was glad the alternator had failed and 
prevented the more extensive damage that would have occurred if I had 
not caught it when I did...

airgu...@comcast.net wrote:
> Mine was bad after 50 hours. I bought the engine used with a log book. The 
> story goes that the KR was wrecked by a moving company. Sold for parts and I 
> got the engine. Tiny crack only found with die penetrant . Replaced with 
> Great Plains. 
>
>
>
> Paul 
>
> KR   N7970K 
>
> New Hampshire 
>
>
>
> - Original Message - 
> From: " phil brookman "  
> To: " KRnet " < krnet @ mylist .net> 
> Sent: Sunday, November 29, 2009 7:26:50 PM GMT -05:00 US/Canada Eastern 
> Subject: Re: KR> HAPI Flywheels 
>
> sure would like to hear all about those experiences with the hapi flywheels 
> ... 
> any chance of sharing 
> phill   uk 
>
>
>
>
>  
> From: "JMelvin106@ aol .com"  
> To: krnet @ mylist .net 
> Sent: Wed, November 25, 2009 12:34:38 AM 
> Subject: Re: KR> HAPI Flywheels 
>
> My experience with elongated dowel pin holes and cracked flywheels usually   
> stems from under torque on the flywheel retaining bolt and/or undersize 
> dowel  pins. It is the only place on a VW that is safe to slightly exceed max 
> torque  value but not more than 10%. 
>
> John Melvin 
> El Paso 
>
>
> In a message dated 11/24/2009 8:02:18 A.M. Mountain Standard Time,   
> iflyavw @ msn .com writes: 
>
>
> To  date we have replaced 107 HAPI aluminum flywheels in the last 28 years. 
> I  would guess that 100 of them were 4 dowel versions.  Most of the 
> builders  caught the problem via the service bulletin.  The flywheel will 
> start to   
> elongate in the dowel pins holes and eventually crack between the holes 
> which  then lets the flywheel free spin so to speak. 
>
>
>
> If memory  serves, HAPI , the company was sold to Mosler Motors in 1988 -89 
> ish .   This company then became Total Engine Concepts.  So it is likely that 
> many of the Mosler / TEC engines also had the acquired HAPI flywheel 
> inventory  installed on their engines also. 
>
> Steve  Bennett 
>
> iflyavw @ msn .com 
>
>
>
>
> _   
> Windows  7: I wanted simpler, now it's simpler. I'm a rock  star. 
> http :// www . microsoft .com/Windows/windows-7/default. aspx ?h= myidea ? 
> ocid =PID247 
> 27::T: WLMTAGL :ON: WL :en-US: WWL_WIN_myidea :112009 
> _  __ 
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> jsp 
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>
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>
>
>
>
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>
>   

KR> HAPI flywheel

[John C Edwards]

The 1835 Hapi on my KR had a 4 hole aluminum flywheel, and it too was 
very  close to failing when I discovered it while changing out the 
alternator which had gone TU.
Question,,why is TU considered a bad thing? I always thought it was a 
good thing...

Mark Langford wrote:
> And if it has an aluminum flywheel, check out the two photos at 
> http://www.krnet.org/misc/HAPI_flywheel/050917111m2.jpg and 
> http://www.krnet.org/misc/HAPI_flywheel/050917111m.jpg  .  This was on Jim 
> Hill's HAPI engine, and it appears to be a matter of seconds away from 
> coming apart.  Steve at Great Plains also has a cure for this, I believe. 
> What made it obvious was loaded of end play on the crankshaft...the prop 
> would move fore and aft an eighth of an inch or so, rather than the .004" or 
> so it's supposed to be.
>
> Mark Langford
> N56ML "at" hiwaay.net
> website at http://www.N56ML.com
> 
>
>
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>
>   

KR> Phoenix Accident

[John C Edwards]

Sounds like the pilot made the best of a bad situation! Good to hear he 
will heal and be ok!

Bob wrote:
> October 30 started off as a beautiful, sunny day with unlimited 
> ceiling/visibility and light/variable winds. After a thorough pre-flight and 
> two hi-speed taxi runs, N811RJ took off. The engine was sounding excellent, 
> aircraft was stable in all parameters, THEN at 300' began losing power, 
> engine still running and no obvious instrument/gauge indication anything was 
> wrong. Aircraft entered a left hand l5 degree turn and safely landed upon a 
> dry flat area next the riverbed. UNFORTUNATELY, the aircraft slid on the 
> light dust over the hard surface for over 450' and impacted an earth berm 
> just before Camelback Rd. 
>
> The plane was being flown by an excellent test pilot, who was injured, 
> receiving a deep cut in the forehead, requiring 21 stitches, slight abrasions 
> on his left hand. He will heal and be okay. 
>
> Test pilot told me he lost power at 300' and the engine responded to mixture 
> and throttle, just no power. Shut everything down just be landing. Impact 
> with berm at about 40 mph. The shoulder harness attachment points failed, 
> ripping the wooden structure from the fuselage. Damage includes spinner & 
> plate, 2 prop blades, nose gear, one exhaust pipe, oil filter casting, 
> distributor cap, main spar broke loose from fuselage breaking framework 
> around it, pilot side left rudder pedal bent, bottom of the fuselage from 
> firewall (firewall loose in a few places) to back the pilot seat torn loose.
>
> FAA/NTSB preliminary conclusion is that the fuel tank vent was blocked 
> partially somehow at altitude and caused the loss of power.
>
> I HAVE STARTED REBUILDING.
> Until I know more,
>
> Bob
>
>
>   

KR> Gathering weather

[John C Edwards]

I dont know any virgins!

Larry Flesner wrote:
>
> I've been checking the weather for the Gathering and it has gone from 
> rain to sunny and back to "iffy" with chance of rain.  Someone needs 
> to make a sacrifice to the weather Gods. :-(  Who's going to step up 
> to the alter? :-)
>
> Larry Flesner
>
>
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>   

KR> pilot range extender

[John C Edwards]

I think some aircraft back in WW2 were equipped with that kind of device 
and it was called a relief tube.

Dj Merrill wrote:
> On 6/17/2009 6:37 PM, Harold Woods wrote:
>   
>> a plastic funnel, rubber hose that goes out through the floor and is bent 
>> back pointing astern. 
>> 
>   
>   Why is it raining?  There isn't a cloud in the sky!  *grin*
>
> -Dj
>
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>   

KR> "bad day" flight

[John C Edwards]

Mark ,

I am constantly learning or remembering lessons learned by reading your 
posts. In this case , I am reminded of something I learned long ago, but 
had forgotten90% of all engine problems or failures occur during the 
first or a subsequent power reduction. My own uneventfull engine 
failures over the 30yrs of  my flying confirm those statistics.
Thank You for the reminder!

John Edwards at mykitlog.com/kapowsin

Mark Langford wrote:
>
>   It occured to me afterwards that in the interest of preserving my own butt, 
> I never touched the throttle or mixture once I got to the altitude I was 
> planning on flying at...about 2000'.  I did a lot of turns and whipping back 
> and forth, but didn't mess with those knobs on the panel.   If I don't pull 
> or push on those cables, they're not going to come loose and leave me in a 
> compromising position.  
>
> Mark Langford
> N56ML "at" hiwaay.net
> website at http://www.N56ML.com 
> 
>
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>
>   

KR>PISA carb needle jet modification

[John C Edwards]

Joe,

What you did is exactly what the manufacturer of my AeroCarb said to do 
concerning setting a wide open stop a little bit short of wide open.

Martek Mississippi wrote:
> I remembered reading this about shaping the needles on a posa carb. It was 
> on the KRNet..may still be. Here is the Link for it elsewhere:
>
> http://users.lmi.net/~ryoung/Sonerai/Fix_Your_Posa_Carb.html
>
> - Original Message - 
> From: "Joe Beyer" 
> To: 
> Sent: Monday, October 20, 2008 1:48 PM
> Subject: KR> RE: Revflow carb for 1835 VW
>
>
> I have a 29mm Posa Super Carb. On my 1641cc VW and have a similar situation.
> When I adjust the linkage so the slide opens all the way the engine quits. I
> have the throttle stop set so when the maximum rpm is reached the slide is
> about 90% open. Once I tried to adjust it out so I could get wide open
> throttle by changing the needle to a more rich setting. On take off when I
> was climbing out and had ram air the engine lost power and only regained
> power when I came back on the throttle. I flew the pattern and landed, then
> put the old needle back in and reset the throttle stop back to 90%. It works
> well now the way it is.
>
> -Joe
>
> Scappoose Ore.
>
>
>   
>> I have an 1835 VW with a 34mm Revflow carb and a 52x47 prop.
>> I ran it the other day and reached peak RPM at about 2/3ds
>> throttle.  More throttle killed the engine.  I asked Joe
>> Horvath about it and he replied :
>>
>> "A 34mm carb for an 1835cc engine is extremely large.  The
>> air flow that the engine needs is considerably less than what
>> a 34 will flow.  Therefore, you may reach max engine rpm of
>> 3200 with partial throttle, but the mixture may be rich.
>>   Trying to tune a 34mm carb to the 1835cc engine will
>> not be easy. ."
>>
>> Apparently I would be better off with a smaller carburator.
>>
>> If anyone out ther has a 30 or 32mm revflow they would like
>> to sell or trade, contact me off list (ankerst...@embarqmail.com).
>>
>> Brad Ankerstar, SW Ohio
>> N774A, KR2R, almost there.
>> 513 932-2514
>> 
>
>
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>   

KR> Revflow carb for 1835 VW

[John C Edwards]

I have a 1835 in my KR1 and just installed a AeroCarb 32mm and am 
finding it very touchy in trying to adjust the mixture just right also 
and am starting to wonder if i should have gone with the 29mm.

John Edwards in Seattle

Myron (Dan) Freeman wrote:
> (snip)> "A 34mm carb for an 1835cc engine is extremely large.
>
>
>
> Yes it probably is, I'm running a 36 mm Rev Flow carb on a 2600 cc VW type 4
> engine.
>
>
>
> A 34 mm Rev Flow might of course do much better on a 2180 or 2275 VW engine.
>
>
>
> I hope you find someone who wants to swap with you or buy it outright.
>
>  
>
> Regards, 
>
> Myron (Dan) Freeman 
>
> Indpls, Ind. 46203-3570 
>
> Home of the Indy 500, 
>
> the World's most famous 
>
> auto race. 
>
> mfreem...@indy.rr.com 
>
>  
>
> ? ? ? ? ? ? 
>
>  
>
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>   

KR> KR1B

[John C Edwards]

I have a KR1 modified. What is a KR1B?

John Edwards at   mykitlog.com/kapowsin

James Neely wrote:
> I see very little about the KR1B anywhere.  Is this an"orphan"?  Is it a
> "dog"?   I would think that the fact that no one seems to have built one
> suggests that it's not a good choice.
> Has anyone any more info on it?  I keep looking at it thinking it might be a
> nice project, but bitter experience with the American Eaglet many years ago
> makes me cautious.
> James
>