>> The right thrust angle for the RV7A is 1º10'.  I converted this to
>> 1.66 degrees.  Then drew it out and measured the off set at the
>> firewall (37.5 inches) to be .842 inches.  Is this correct?
>> What is the firewall to prop distance?
>> SIN ( 1.66 degrees ) = offset / firewall to prop distance.
>> offset = SIN ( 1.66 degrees ) X firewall to prop distance.
>> SIN ( 1.66 degrees ) = .0289 times 37 inches  = approx. 0.87815002 :)
>
> 10' = 0.166 degrees  did you leave out the 1 when typing?
>
> Bob W.
>
> --
> N93BD - Rotary Powered BD-4 - http://www.bob-white.com
> 3.8 Hours Total Time and holding
> Cables for your rotary installation - http://www.roblinphoto.com/shop/
>
> Right Bob.  10' is not .66 degrees. Darn why did I not catch that?
>
> 10/60 is  approx. 0.16666667 degrees.
>
> sin (1.1666) = approx. 0.020360651 times 37 = approx. 0.75330536
> --
> Paul Lamar ...No rotor no motor.

Yeah,  I caught that right after I pressed "send".   I already sent
along the correction.    Thanks for checking .     Jerry

Jerry or anyone with an RV-7 or any straight RV series. Please ask the
builder if they made a correction to the Vertical stabilizer before you go
build motor mounts for these builders. A lot can be changed with these
offsets as well. If you have a Straight 7 guy with a 2.17 and the offset
built it, you will have an aircraft that will lose rudder authority with T/O
power. Please give this your utmost consideration. Success would be obtained
by having a straight mount with the tail offset or vice versa but not both.
Sincerely,
Doug Mueller
RX-6 13BT
N900DM
Boulder City, NV


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