Hey guys, Sorry for the lack of an intelligent remedy. After reading my response again, I can't believe I even came up with that rediculousness, must have been the lack of sleep or this cold I have.

http://strongpitchtrim.com/ Sam, Here is your link. It is a double spring centered link, movable on a threaded rod a motor turns the rod. Charlie

Charlie - Could you provide note info, or a link, about the Strong trimmer? Sam Sent via wireless gizmo.

Sam, I know you have the LS1 but this might help a guy like you to experiment. On the G.U. the most simple solution is to fabricate a very light extension to the full elevator span an inch long with a

I wonder why they're not needed on the GU canard.

Bruce, Sparrow strainers set up properly are supposed to counter balance the force at all airspeeds. I could never get mine to fly hands off. I now have a Strong trimmer like the EZ boys use and I

Jim, Sparrow strainers are also proportional to the speed so the right correction is applied at all air speeds automatically. Regards, Charlie Johnson

I wrote "lift or downforce" because which one the flap produces depends on whether it's placed on the upper or lower surface of the trailing ege: upper-surface placement promotes downforce which would

Wait. . . I just looked up "gurney flap" in wikepedia. . .wouldn't a "gurney flap" push the trailing edge of the elevator UP and the nose DOWN? That seems to be the opposite of what the sparrow

Hi, Unbalancing a control surface as you suggest is an extremely bad idea; it is making flutter more likely. I am sure the designers looked at other possibilities before settling on the sparrow

YEARS ago I had one sparrow strainer depart depart in level flight at 160mph and the stick was literally pulled out of my hand. It caused a severe nose down attitude. I talked to Gene S about this as

This is what I was talking about when I said we discussed "reflexing" the trailing edge. ...just not as drastic.

Do a web search on "Gurney flap". Dan Gurney put the first one on Bobby Unser's Eagle Indy car in 1971; it's now widely used on aircraft, especially helicopter tail surfaces. It's a length of

Prop now sold. Jim Jim Ham wrote: -- Porcine Associates LLC 244 O'Connor St. Menlo Park, CA 94025 USA +1(650)326-2669 fax +1(650)326-1071

I just thought of another plus for the sparrow strainer. It is placed below and behind the trailing edge of the elevator. This does two things: It puts it in relatively undisturbed air and it

Another thought that was fully discussed on the DF list a long time back, was to simply reflex the entire span of the trailing edge of the elevator. What was inconclusive was if it would net less drag

Because when done properly it is in fact marginally cleaner. I'm just offering alternates. It's also impossible to get knocked off by someone's unsuspecting shin. :) And nearly impossible to come