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  #1  
Old 04-07-2015, 10:22 PM
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jenatepilot jenatepilot is offline
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Default Elevator trailing up. A lot

So when I'm WOT and ripping down the runway at 183kts IAS, my elevators are a good 1/4" or more above the tips. Otherwise the bird will climb.

Does anyone know what the "lowest drag" position is for the Roncz Canard and Elevators. I want to optimize this for Cruise flight. If it's everything flush then should i raise my wings leading edges to get the nose down?

Thanks.
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Old 04-07-2015, 11:27 PM
LEZ1675 LEZ1675 is offline
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Default Re: Elevator trailing up. A lot

Maybe double-check canard incidence.

Have you done low speed stall testing yet?

Sounds good so far !
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Old 04-07-2015, 11:35 PM
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jenatepilot jenatepilot is offline
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Default Re: Elevator trailing up. A lot

Yep. 52kt IAS STALL.
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Old 04-08-2015, 12:57 AM
Marc Zeitlin Marc Zeitlin is offline
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Default Re: Elevator trailing up. A lot

Quote:
Originally Posted by jenatepilot View Post
So when I'm WOT and ripping down the runway at 183kts IAS, my elevators are a good 1/4" or more above the tips. Otherwise the bird will climb.
That is normal for high IAS's. In normal cruise flight at altitude, when you're at an IAS of 135 KIAS to 150 KIAS, give or take, your elevator tips will be approximately in trail, if you're in the middle of the CG range - maybe slightly up a bit if you're aft CG.

Quote:
Originally Posted by jenatepilot View Post
Does anyone know what the "lowest drag" position is for the Roncz Canard and Elevators.
The drag bucket is pretty flat in the plus 5 degree (down elevator) to minus 10 degree (up elevator) range, IIRC. Not much difference in drag.

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Originally Posted by jenatepilot View Post
I want to optimize this for Cruise flight.
You are. No one cruises around down low at 180 KIAS.

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Originally Posted by jenatepilot View Post
If it's everything flush then should i raise my wings leading edges to get the nose down?
Don't know what the first part of that question means, but it sounds to me as though you should leave everything alone and that it's rigged approximately correctly.
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Old 04-08-2015, 10:08 AM
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jenatepilot jenatepilot is offline
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Default Re: Elevator trailing up. A lot

That's it. That's what I needed. Thanks again Marc.
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