Today's Message Index:
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1. 04:15 AM - Re: Re: Vertical Offset w/Corvair (Charles N. Campbell)
2. 04:31 AM - Re: Re: Vertical Offset w/Corvair (Charles N. Campbell)
3. 07:48 AM - Re: Vertical Offset w/Corvair (jarheadpilot82)
Message 1
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| Subject: | Re: Vertical Offset w/Corvair |
Oscar, why not make you some new L-shaped brackets to go on the top rear of
the vertical stabilizer and twist them the correct number of degrees. That
way the vertical piece in the stabilizer would not be twisted at all. Chuck
On Tue, Jan 17, 2017 at 10:58 PM, taildrags <taildrags@hotmail.com> wrote:
>
> 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
>
> --------
> Oscar Zuniga
> Medford, OR
> Air Camper NX41CC "Scout"
> A75 power, 72x36 Culver prop
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=465177#465177
>
>
Message 2
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| Subject: | Re: Vertical Offset w/Corvair |
Oscar, I just drew a diagram and did a bit of trig. The angle yopu would
have to twist the vertical brackets would be 1.4 degrees. Chuck
On Tue, Jan 17, 2017 at 10:58 PM, taildrags <taildrags@hotmail.com> wrote:
>
> 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
>
> --------
> Oscar Zuniga
> Medford, OR
> Air Camper NX41CC "Scout"
> A75 power, 72x36 Culver prop
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=465177#465177
>
>
Message 3
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| Subject: | Re: Vertical Offset w/Corvair |
Oscar,
Excellent explanation. Very clear, logical, and concise. Nicely done.
Chuck,
Again, how old are you? I am 59 and I have forgotten how to spell Trig, much less
do it. You are my hero, and I want to be like you when I grow up. But being
a professional air line pilot, I may never accomplish that (grow up, that is.)
[Wink] [Laughing]
--------
Semper Fi,
Terry Hand
Athens, GA
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=465187#465187
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