REFLECTOR: Thrustline change
dennis.doc
dennis.doc at gmail.com
Sun Mar 31 11:58:08 CDT 2013
I added over one inch of shim to my engine mount. I called Scott Swing to
make sure it would be OK. He told me "no problem." He and a local friend
said there are advantages in take off and landing (more downward thrust)
and that I could change it later if it proved ineffective. I'm still
flying off the 40 hours, but in the 10+ hours I've flown, no perceivable
problems. I do notice that in cruise, while trimming the elevator 100% down
- the trailing edge remains virtually neutral.
Dennis Martin
On Fri, Mar 29, 2013 at 11:29 AM, David Ullman
<ullman at robustdecisions.com>wrote:
> When I cruise with only me in the SEFG I have to put in 1/2 inch of down
> trim (elevator up) or more. This is clearly inefficient. I already have
> 18lb of lead in the nose and don't want to add more. A friend suggested
> shimming the top of the engine mount for a little downward pitch moment. I
> sort of like the idea but am worried that it might increase my take off
> distance as it will drive the canard downward a little. He thinks it may
> help as the engine thrust line is slight more upward.
>
> Any thoughts or experiences?
>
>
> David Ullman
> N444DX
> President EAA 292
> 541-760-2338
> david at davidullman.com
>
>
>
>
>
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