Vince Frazier
Joined: 10 Jan 2006
Posts: 132
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 Posted: Mon Jan 11, 2010 7:42 am Post subject: speed and trim |
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SNIP From: Ernest Hale <ernest(at)flmitigation.com>
Down trim is what was meant. Can you give us some idea as to what you are talking about when you say there are other issues besides speed? I didn't build my rocket but had it reviewed by an A&P before I bought it and he signed off on it. Is there anything that needs to be evaluated due to the down trim? SNIP
Ernest, SNIP
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| Quote: | From what you've said it would seem that you are using full nose down trim at cruise. If you add a pax in the back, what happens then? Do you have to hold forward pressure on the stick? If so, holy crap, doesn't your arm get tired!?
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It sounds like you've got one of two possible problems:
1) your trim tab is sized or rigged improperly. Maybe your builder biased the trim for more nose up travel to help with pattern speeds. If so, then maybe you can adjust it back a little bit.
2) or more likely, your HS is rigged improperly
There are many ways to check your HS rigging, one way is listed here:
http://www.vincesrocket.com/finishing.htm
Basically, you can check your rigging with a level and a few simple shims. Level the wing per the text, then go see what the HS incidence is. I'll bet it's off.
If you find that the HS incidence is wrong, change it. It shouldn't be that difficult, but get help as needed to make sure you do it right.
YMMV. Good luck.
Vince
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_________________
Vince Frazier
3965 Caborn Road
Mount Vernon, IN 47620
812-464-1839 work
812-985-7309 home
F-1H Rocket, N540VF
http://vincesrocket.com/ |
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