I hate to correct Mark about his own plane but my under standing
was that Marks's balance started out worse than mine and Phil's by 4
times but ended up near perfect at .004inches/second. Mine and Phil's
ended at about .028 inches/second knowing that anything under .030 is the
threshold for Arnold to consider the job correct.
Our planes are still in Florida but we are home safe. Even if I
could have gotten home without rain yesterday the surface winds would
have destroyed me for sure.
Joe Horton
On Sun, 12 Nov 2006 21:09:51 -0600 "Mark Langford" <n5...@hiwaay.net>
writes:
> VairHeads,
>
> This is a quickie report (I'll let others fill in the details), but
> I'm back
> from another excellent Corvair College. The new format of WW
> building an
> engine from start to finish with a running commentary was excellent,
>
> resulting in a great education for engine builders (see
> http://home.hiwaay.net/~langford/corvair/cc2006/061112326m.jpg ). I
> wish I'd
> listened in on more of it, but also enjoyed talking to other pilots
> and
> engine builders. I met some more great folks, as usual. I'm sure
> Grace
> will work up a web page when she gets a chance. Those of you who
> missed it
> really missed a good one!
>
> Those who noticed the exhaust leak on my number 4 cylinder may be
> relieved
> to know that I made it back without succumbing to carbon monoxide
> poisoning.
> I had a 40 mph headwind much of the way on the way back (and it
> would have
> been worse had I gone to my usual 10,500'), so it took me 5 hours of
> flying
> to get back home, although the weather was great otherwise. I
> occupied
> myself with some testing at 7500', since it was a 59 degree OAT day.
> Based
> on what I learned today, I'm about ready to claim 162 mph as my
> "cruise"
> speed at 75% power.
>
> Something I'm on the hook for is a report on how the
> engine/prop/spinner
> balancing went. Ever since I put my homemade spinner/backplate on,
> I've
> wanted to have it balanced. Arnold Holmes hooked up his vibration
> equipment
> and measured the vibration levels on my engine. He started out at
> something
> like .500 inches/second (don't ask me to explain this) and ended up
> around
> .040" (I believe it was). I was skeptical that I'd see much
> difference, as
> I already thought it was a pretty smooth engine. Once settled in at
>
> altitude on the way back, it was absolutely amazing how smooth it
> was. I
> balanced a little flashlight on end on top of the panel, and it
> stood there
> for two hours until I dropped down into the turbulence to land at
> M38. The
> exhaust pulses on the bottom of the plane are now the primary source
> of
> vibration, not the engine. It feels so much better that I flew the
> last
> hour with the engine wide open, and it was really singing. It was
> less
> buzzy and really felt happy at any rpm. This is a real improvement,
> and I'm
> not just saying that.
>
> Other news is the cat's out of the bag on how bad my landings really
> are, at
> least with a passenger and full fuel. Fifty witnesses at least.
> Nobody saw
> the squeaker on this end, however...
>
> Mark Langford, Harvest, AL
> see homebuilt airplane at http://www.N56ML.com
> email to N56ML "at" hiwaay.net
>
>
>
>
> _________________________________________________________
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>
Joe Horton, Coopersburg, PA.
joe.kr2s.buil...@juno.com
