---------------------------------------------------------- RV9-List Digest Archive --- Total Messages Posted Tue 07/29/03: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:06 AM - rv-9a flight characteristics (ivo welch) 2. 07:48 AM - Re: Yaw trim - Was (rv-9a flight characteristics) (Andy Karmy) 3. 11:00 PM - Fuel Vent Screens (Leland) 4. 11:22 PM - [ Jim Cone ] : New Email List Photo Share Available! (Email List Photo Shares) ________________________________ Message 1 _____________________________________ Time: 04:06:25 AM PST US From: ivo welch Subject: RV9-List: rv-9a flight characteristics --> RV9-List message posted by: ivo welch hi chaps: noel (currently in oshkosh with n994ks) actually spent some time to exactly calibrate the plane for straight-and-level flight. before then, it had a very tiny problem. (of course, the rudder needs a very big tab, which Noel put on for me, too.) From Noel's email: today I taped a "wedge" on the left side of the rudder. Was not quite enough but what a difference! I think that there is still a tendency for the aircraft to fly sideways even with the wing leveler on. I can tell by setting the aircraft up strait and level at 120, wing leveler on and trimmed to hold a coarse, ball centered, the compass is just not quite level. When the compass is leveled, ball centered, there is a tendency for the nose to drop and the aircraft to turn. There are several things that can cause this. 1. engine thrust angle 2. wing wash (we can't do anything but set 1 flap down a little) When we get the aircraft in for annual we will measure the wings and see if that is a contributing factor. The thrust angle is a trial and error by putting washers under some the engine mounts, this is actually easier than most think. ________________________________ Message 2 _____________________________________ Time: 07:48:21 AM PST US From: "Andy Karmy" Subject: RV9-List: Re: Yaw trim - Was (rv-9a flight characteristics) --> RV9-List message posted by: "Andy Karmy" This rudder trim subject is something that I never have understood yet... I see all sorts of RV's with tabs and wedges on the rudder... Here's what I did. When first flying mine with the wheel pants and leg fairings on I went from perfectly centered to about half a ball off at cruise. I simply loosened up the main gear leg fairing hose clamps, put just a bit of "english" on them to "steer" in the direction of the needed correction and TaDa plane flys straight and true with no tabs or wedges... What am I missing? As for the roll adjustments, I adjusted the flaps & ailerons until the plane flew level and all the surfaces were lined up. I do have a small amount of variation between the left and right flap neutral positions. - Andy ---------- Original Message ---------------------------------- From: ivo welch >--> RV9-List message posted by: ivo welch > > >hi chaps: noel (currently in oshkosh with n994ks) actually spent some >time to exactly calibrate the plane for straight-and-level flight. >before then, it had a very tiny problem. (of course, the rudder needs a >very big tab, which Noel put on for me, too.) > > From Noel's email: > >today I taped a "wedge" on the left side of the rudder. Was not quite >enough but what a difference! I think that there is still a tendency for >the aircraft to fly sideways even with the wing leveler on. I can tell by >setting the aircraft up strait and level at 120, wing leveler on and trimmed >to hold a coarse, ball centered, the compass is just not quite level. > >When the compass is leveled, ball centered, there is a tendency for the nose >to drop and the aircraft to turn. > >There are several things that can cause this. >1. engine thrust angle >2. wing wash (we can't do anything but set 1 flap down a little) > >When we get the aircraft in for annual we will measure the wings and see if >that is a contributing factor. The thrust angle is a trial and error by >putting washers under some the engine mounts, this is actually easier than >most think. > ________________________________ Message 3 _____________________________________ Time: 11:00:02 PM PST US From: Leland Subject: RV9-List: Fuel Vent Screens --> RV9-List message posted by: Leland Using Proseal, I glued aluminum window screen over my fuel vents as suggested by Van's, but both sides have been damaged even though my project is still in the garage. The dog's running under it may have dislodged at least one of the screens. Does anybody have something more durable to put over those vents? I've read that screen is needed to keep insects from entering and plugging up the lines. ________________________________ Message 4 _____________________________________ Time: 11:22:52 PM PST US Subject: RV9-List: [ Jim Cone ] : New Email List Photo Share Available! From: Email List Photo Shares --> RV9-List message posted by: Email List Photo Shares A new Email List Photo Share is available: Poster: Jim Cone Subject: Nice Straight Edge... http://www.matronics.com/photoshare/jimnbev@olypen.com.07.29.2003/index.html o Main Photo Share Index http://www.matronics.com/photoshare o Submitting a Photo Share If you wish to submit a Photo Share of your own, please include the following information along with your email message and files: 1) Email List or Lists that they are related to: 2) Your Full Name: 3) Your Email Address: 4) One line Subject description: 5) Multi-line, multi-paragraph description of topic: 6) One-line Description of each photo or file: Email the information above and your files and photos to: pictures@matronics.com