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Old 06-21-2012 | 05:32 AM
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AA5BY
 
Joined: Sep 2006
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From: White Oak, TX
Default RE: How to trim without subtrim


ORIGINAL: Stixoz

I'm not very familiar with thrust lines etc but i did notice from the start there is a 2mm gap between spinner and cowl at the top and a 3.5mm gap at the bottom.

I fuelproofed after i mounted the engine mount so i didn't mess with alignment. If my engine is pointing ''up'' to much wouldn't that give me the opposite problem to what i'm having?

Thanks in advance

Stix
It is really hard to say without knowing the numbers. An example of the difficulty is that when a lot of up elevator trim is needed for powered flight trim... it can produces a too shallow or too steep of glide slope dependent upon the stab/elevator proportions and authority of the stab or elevator. What I'm saying is if the stab has a lot of authority and it is positive (as might be the case), it will produce the effect you noted of a too steep glide slope. If the elevator has more authority, the up trim that you describe would produce a too shallow of glide slope.