---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Sun 11/20/05: 4 ---------------------------------------------------------- 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 _____________________________________ Time: 02:36:14 PM PST US From: "Douwe Blumberg" 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 ________________________________ Message 2 _____________________________________ Time: 03:14:23 PM PST US From: "Oscar Zuniga" Subject: Pietenpol-List: Corvair College 9 update --> Pietenpol-List message posted by: "Oscar Zuniga" 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 _____________________________________ Time: 05:44:35 PM PST US From: Don Morris Subject: Re: Pietenpol-List: down thrust 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 _____________________________________ Time: 06:30:50 PM PST US From: Subject: Re: Pietenpol-List: down thrust 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