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Leland Collins
Joined: 10 Jan 2006
Posts: 21
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 Posted: Tue Feb 14, 2006 9:34 am Post subject: Elevator Trim Position |
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The aft-end of my elevator trim tab is up by 1/4" when set for cruise.
This would tend to force the elevator down and thereby cause the
aircraft to descend. It would be more aerodynamically efficient to lower
the angle of attack of the horizontal stabilizer a bit. Has anybody on
this list flying an RV9A determined their trim tab position in cruise?
Leland
73 hours
N137LC
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Leland
RV9A
N137LC |
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Albert Gardner
Joined: 10 Jan 2006
Posts: 455
Location: Yuma, AZ
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| Posted: Tue Feb 14, 2006 9:50 am Post subject: Elevator Trim Position |
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We were looking into this over the weekend on 2 RV-9A's here at Yuma. Pilot
only and full fuel had both pretty much in trail. Low fuel, pilot and
passenger had down elevator-showing about 1/2 inch or so of the
counterbalance arm above the HS.
I'm wondering if it isn't just an artifact of W&B changes.
Albert Gardner
N872RV 670 hrs
Yuma, AZ
| | - The Matronics RV9-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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RV-9A N872RV
RV-10 N991RV |
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Leland Collins
Joined: 10 Jan 2006
Posts: 21
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| Posted: Wed Feb 15, 2006 9:15 am Post subject: Elevator Trim Position |
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Albert, it sounds like our numbers are consistent. My 1/4" gap was for
full fuel, pilot only and 60% power at 5000' on a stock O320. The gap
should be greater at higher power. It sounds like a thinner shim on the
front of the HS would make for better aerodynamics.
Leland
| Quote: | Time: 09:50:38 AM PST US
From: "Albert Gardner" <ibspud(at)adelphia.net>
Subject: RE: Elevator Trim Position
We were looking into this over the weekend on 2 RV-9A's here at Yuma. Pilot
only and full fuel had both pretty much in trail. Low fuel, pilot and
passenger had down elevator-showing about 1/2 inch or so of the
counterbalance arm above the HS.
I'm wondering if it isn't just an artifact of W&B changes.
Albert Gardner
N872RV 670 hrs
Yuma, AZ
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| | - The Matronics RV9-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV9-List |
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_________________
Leland
RV9A
N137LC |
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