Today's Message Index:
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1. 07:17 AM - Re: W/B QUESTION (dwilson)
2. 09:02 AM - rebuilding an A65 (Oscar Zuniga)
3. 05:44 PM - Fw: good flying video (airlion)
4. 07:46 PM - Re: undercamber (dwilson)
5. 08:42 PM - Re: Re: undercamber (Steve Emo)
Message 1
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| Subject: | Re: W/B QUESTION |
Here's how Bernie did it.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=353112#353112
Attachments:
http://forums.matronics.com//files/piet_wandb__135.pdf
Message 2
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| Subject: | rebuilding an A65 |
>From an A&P whom I respect=2C and who knows these engines very well: -OZ
The connecting rod numbers face the top of the engine in it's flight positi
on. What that really means is that the oil port in #1 rod should spray int
o #2 cyl and the oil port in the bottom of #2 rod should spray into #1 cyl.
The same relationship exists between cyls #3 and #4. Another way to look
at it is that the oil ports on the rod caps for #1 and #2 should point tow
ard each other. The same for #3 and #4.
About half of the Continental engines I tear down have rods in backwards.
Usually # 2 and #4. That's a testament to how tough these engines are=2C n
ot a testament to not needing the oil ports. Those oil ports in the bottom
of the rod spray oil into the bottom of the opposing piston when at BDC to
help cool the opposing piston.
There is no specific orientation for the pistons. The A-65 pistons are cam
ground=2C but they are also fully symmetrical as related to the axis of th
e wrist pin=2C so there is no up/down orientation.
If the builder is going to the cost and trouble to rebuild the engine with
practically all new parts=2C then I hope he does himself a big favor and ba
lances the engine properly. The crank should be balanced=2C then the rods
should be balanced end-for -end. That means the small ends should all weig
h the same as their movement is horizontal. The large end of the rods move
rotationally=2C so they should all be match balanced as well. Most engine
s have had rods replaced individually at times=2C so there is no balance re
lationship at all between the rods. I see them with quite a wide range of
weights. The pistons should also be balanced along with the wrist pins. T
here is nothing like flying behind a properly balanced engine. Continental
didn't do a particularly stellar job of balancing the cranks and the origi
nal rods were only balanced to match overall weights. It can be done much
better and it pays off in smoothness=2C performance and longevity of the en
gine.
Message 3
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| Subject: | Fw: good flying video |
take a brake from low and slow and enjoy. I used to do this in my USMC days.
Gardiner
----- Forwarded Message ----
From: Susan Mason <susangmason@gmail.com>
Sent: Tue, September 20, 2011 8:09:59 PM
Subject: good flying video
Shotze,
Here is something from the PCN newsletter. Notice the wonderful music --
"Joyful, Joyful, We Adore Thee," a hymn set to Beethoven's Symphony No. 9.
Love you-
S.
Enjoy the ride and then try some of the other links for more on the daily
thrills of flying a jet fighter.
This is a video depicting the pure beauty of free, unrestricted flying. To the
pilots, you will love the familiar scenes. To those who aren't pilots, this may
help explain why we loved flying so much. As I watched this, I was reminded
that it was never a "job". It was always a pleasure. There were times when it
was stressful, but overall it was pure love and joy -- even after the scary
parts, because you either "lucked out", or you successfully managed the
"issue"-- just more adrenalin in either case. It's hard to imagine another
career as exciting, rewarding and satisfying. When you go to this site,
immediately go to Full Screen so the picture fills whatever size monitor you
have. The music just adds more to the scenes.
http://www.youtube.com/watch?v=T_VtgDfL3Eg&feature=related
Message 4
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I was told by a very good friend of Bernie's that He had actually tried an airfoil
with no undercamber. He tried the clark Y airfoil and was not pleased with
the performance. He thought that he could design an airfoil that would perform
better. He experimented with a number of airfoils. He designed the airfoil
and concluded that it performed better than the Clark Y that was used on similar
" ships ".
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=353145#353145
Message 5
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Guess the "right" airfoil depends on what you want...
Sent from my iPhone
On Sep 24, 2011, at 10:42 PM, "dwilson" <marwilson@charter.net> wrote:
>
> I was told by a very good friend of Bernie's that He had actually tried an airfoil
with no undercamber. He tried the clark Y airfoil and was not pleased
with the performance. He thought that he could design an airfoil that would
perform better. He experimented with a number of airfoils. He designed the airfoil
and concluded that it performed better than the Clark Y that was used on
similar " ships ".
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=353145#353145
>
>
>
>
>
>
>
>
>
>
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