Today's Message Index:
----------------------
1. 02:36 PM - down thrust (Douwe Blumberg)
2. 03:14 PM - Corvair College 9 update (Oscar Zuniga)
3. 05:44 PM - Re: down thrust (Don Morris)
4. 06:30 PM - Re: down thrust ()
Message 1
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Hello,
I know that there is some downthrust in the Ford installation. What is the accepted
downthrust for a continental?
Also, what does downthrust do? does it line up the thrust line with the flight
line?
If you don't have downthrust, I assume the plane will feel tailheavy at power and
nose heavy in glide? with it's longitudinal balance shifting noticably with
power settings?
Douwe
Message 2
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| Subject: | Corvair College 9 update |
--> Pietenpol-List message posted by: "Oscar Zuniga" <taildrags@hotmail.com>
William has posted the final three parts to the report (pictures and text)
from Corvair College 9, parts III, IV, and V. You can access them by
scrolling to the bottom of the page, at http://www.flycorvair.com/cc9a.html
and clicking on the parts you haven't seen yet. The report was broken into
parts for faster loading and easier reading.
Oscar Zuniga
San Antonio, TX
mailto: taildrags@hotmail.com
website at http://www.flysquirrel.net
Message 3
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Can't say much for the specifics for each installation (I am a long way
from there, and am just masochistic enough to try to break totally new
ground on my engine installation), but as for what downthrust does,
among other things it makes the aircraft more stable through power
changes. Without downthrust, when you add throttle, the aircraft will
tend to nose up. This is particularly true for high wing aircraft, such
as our own loved piety birdy. With down thrust, an increase in throttle
will tend to pull the nose around the wing and increase angle of attack,
but the downthrust on the nose will counteract that. Idealy, adding or
subtracting throttle will not affect pitch.
-Don
Douwe Blumberg wrote:
> Hello,
>
> I know that there is some downthrust in the Ford installation. What
> is the accepted downthrust for a continental?
>
> Also, what does downthrust do? does it line up the thrust line with
> the flight line?
>
> If you don't have downthrust, I assume the plane will feel tailheavy
> at power and nose heavy in glide? with it's longitudinal balance
> shifting noticably with power settings?
>
> Douwe
Message 4
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A good place to start would be 1" of downthrust and 1" of offset to the right.
Shim as needed from that point.
Greg Cardinal
----- Original Message -----
From: Douwe Blumberg
To: pietenpolgroup
Sent: Sunday, November 20, 2005 4:34 PM
Subject: Pietenpol-List: down thrust
Hello,
I know that there is some downthrust in the Ford installation. What is the accepted
downthrust for a continental?
Also, what does downthrust do? does it line up the thrust line with the flight
line?
If you don't have downthrust, I assume the plane will feel tailheavy at power
and nose heavy in glide? with it's longitudinal balance shifting noticably with
power settings?
Douwe
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