Today's Message Index:
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1. 07:36 AM - Vertical Offset w/Corvair (Harvey Plummer)
2. 08:10 AM - Re: Vertical Offset w/Corvair (Rick Schreiber)
3. 09:37 AM - Re: Vertical Offset w/Corvair (Harvey Plummer)
4. 07:59 PM - Re: Vertical Offset w/Corvair (taildrags)
Message 1
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| Subject: | Vertical Offset w/Corvair |
Did you guys with a corvair engine offset the front of your vertical stabilizer
1/2" - 3/4" to the left like I have seen those with A65 or O200 engine did?
Rick Schreiber did you offset yours? Results?
Thanks.
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Harv, 485PB
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http://forums.matronics.com/viewtopic.php?p=465160#465160
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| Subject: | Re: Vertical Offset w/Corvair |
Harv,
No I didn't offset mine, consequently I always have to input a little left rudder
in cruise. My plan is to take core of the offset this winter.
Rick Schreiber
NX478RS
Porter Co Regional, Valparaiso IN
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http://forums.matronics.com/viewtopic.php?p=465161#465161
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| Subject: | Re: Vertical Offset w/Corvair |
So Rick, does the front of the vertical stabilizer need to be offset to the left
or the right with the Corvair engine?
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Harv, 485PB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=465167#465167
Message 4
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| Subject: | Re: Vertical Offset w/Corvair |
So let's think about this. We're above Rick's airplane looking down on it as he's
flying. The nose wants to pull to the right, so Rick is applying left rudder
to keep the airplane going straight. As he presses left rudder, the cable
on that side pulls the port side rudder horn and the rudder deflects to port,
which causes the tail to swing to starboard and bring the nose straight. Looking
down on the airplane, it rotates counter-clockwise to bring the nose straight.
So what do we have to do to the leading edge of the vertical stabilizer to get
that same counter-clockwise rotation? We offset it to starboard so that more
of the port side is presented to the relative wind, 'pressing' the tail to starboard.
The LE of the vertical stabilizer on my airplane, which has a Continental
engine that rotates in the opposite direction from the Corvair, is offset
1/2" to the port side but still needs a small rudder trim tab. I think 3/4"
offset would have been better, but I worried about twisting the vertical stabilizer
beam too much by doing that.
There is a picture of the offset on my LE here: http://forums.matronics.com//files/img_1848_571.jpg
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Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power, 72x36 Culver prop
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http://forums.matronics.com/viewtopic.php?p=465177#465177
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