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Thought you guys might like to see my engine compartment. My plan is to mount the Rotary on this mount with a 1/2 " 6061 T6
plate. The original design for the Questair Venture used a IO550 Continental bolted directly(via the oil pan) to this engine mount. Since I have no room below this mount because of the nose wheel retracting into it. I am using the mounting plate as a dry sump plate as well. Soooo. the reason I am asking about raising the Center of thrust is when mounting the Rotary to the original motor mount shown in the Photo and using Marcotte PSRU which rises it another 1.5 in . It actually works out to be around 3 " after I factor in the height of the mount plate PSRU offset and the natural higher point of thrust with the 20B. I seemed to have missed this with all my backyard engineering. The reason i thought this would work better then LS1 I originally planned to install is how neatly the rotary bolted to the original mount without modification to the motor mount and nose wheel retract system. However if you guys think this a none factor . I will proceed . One positive about this I will have a Bigger prop then Normal and it will give about standard ground clearance. Any other thoughts or observations would be welcome.
Tom Giddings
On May 23, 2011, at 12:55 PM, Tracy wrote:
> I'm surprised you are asking about raising it but my guess is that it would have negligible effect. The usual challenge is getting it as high as the original thrust line.
>
> Tracy
>
> Sent from my iPad
>
> On May 23, 2011, at 12:41 PM, Thomas Giddings <tom@midwestaviation.net> wrote:
>
>> Does anyone know what the effect would be on airframe to raise the center of thrust for the crankshaft 1.5 " higher then original design?
>>
>> Kind regards
>>
>> Tom Giddings
>> VP Avionics Sales
>> MIDWEST AVIONICS
>> 200 Hardy Roberts Dr
>> PO Box 219
>> West Paducah,KY 42086
>> 877-904 9966
>> Cell; 727 858-1772
>> FAX:270 744 3466
>> tom@midwestaviation.net
>> Online Store
>> www.midwest-avionics.com
>>
>> < Midwest Aviation Avionics Logo.jpg>
>>
>>
>> --
>> Homepage: http://www.flyrotary.com/
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>
> --
> Homepage: http://www.flyrotary.com/
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