[rebel-builders] Elevator deflection angle
Posted: Sun Feb 19, 2012 6:31 pm
By down elevator force do you mean downforce on the elevator or down elevator authority?
A forward C of G will require more downforce from the elevator in order to lift the nose. You get more downforce by pulling back on the stick.
I would have to assume that if you are worried about three point landings you are having trouble getting the nose high enough.
Is it possible that your horizontal stab angle is not set correctly? The wrong angle on the horizontal stab will require more elevator input to generate the same force.
Dave J
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A forward C of G will require more downforce from the elevator in order to lift the nose. You get more downforce by pulling back on the stick.
I would have to assume that if you are worried about three point landings you are having trouble getting the nose high enough.
Is it possible that your horizontal stab angle is not set correctly? The wrong angle on the horizontal stab will require more elevator input to generate the same force.
Dave J
From: gargus@comcast.net
To: rebel-builders@dcsol.com
Subject: [rebel-builders] Elevator deflection angle
Date: Thu, 19 Aug 2010 14:34:32 -0400
I write about the elevator deflection angle, referencing BobP's
email below. First my elevator has a range of 35 degrees up and
27 degrees down.
I have been flying with a very experienced tail dragger pilot
(over 26,000 hours in crop dusters and tail draggers - must live
in them) Anyway he really knows his stuff. He indicates that there
is not enough down elevator force. Several other pilots indicate
the same and have difficulty in three point landings. So I was
wondering if a forward C of G (11.7") when two people are in it
might create the feeling of not enough down elevator.
_________________________________________________________________
From: bobp@prosumers.ca Number: 37863 Private: No
To: rebel-builders Reference: None Reads: 73
Date: 8/15/2009 1:10 PM Received: No Exported Mime
Subject: Re: [rebel-builders] Rebel - Elevator deflection angle
Conference: Rebel Builders
Hi Jay !
Your setting sounds just fine. I believe the original factory spec.
was 25 degrees up and 25 degrees down ....
Personally, I won't test fly a Rebel with less that 27 degrees of up ...
don't really care too much about the down ... so, up to 30 degrees of
up is ok with me ... but 27 is enough, and works well for me.
--
......bobp
bobp@prosumers.ca
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