Re: Is this stalling? Or something else?

From: torqueburner <beammeup_at_fast.net>
Date: Sun, 25 Feb 2007 17:52:51 -0000

--- In Indoor_Construction_at_yahoogroups.com, "Bill Gowen" <b.gowen@...> wrote:
. . .I think it is a stall caused by moving air. . .Long models will often display this drop in
altitude and then continue flying after they stall. . .

Thanks, Bill. I think this might be it. Even though the head custodian has shown me the
"secret" circuit breakers that turn off the ventilation fans, it often still seems pretty drafty -
maybe just the leaky old building. Maybe it is better or worse depending on outside weather
conditions. Also, our planes are pretty long.
 
> I would be more concerned about what you said in the first paragraph. . . Decalage (again
in my opinion) should be trimmed for maximum cruise efficiency. . .

Yes, that is exactly what we do (at least in the year or two since we read your Trim to Win
article). My choice of wording was poor - I meant that if you attempted to correct for lack of
climb at launch due to the motorstick bending by increasing the decalage, you would observe
the plane stalling during the later part of the flight, and that this behavior is not what I was
seeing.

And thanks to Hack and Nick for their thoughts as well.

Dave Drummer
Received on Sun Feb 25 2007 - 09:55:07 CET