Oscar,
Two clicks of down trim is nothing to be greatly concerned about. The
plane could have been on the verge of stalling during the launch, and the
thermal raised the tail so you didn't notice. While circling in lift you
were pulling back on the stick, so again, you probably would not have
noticed. The same could be true after you left the thermal. Sink will
cause a well balanced airplane to nose up because the tail is being forced
down.
I would also like to suggest to you that you fly a little faster than
just above stalling speed. The plane will probably fly at a lower sink rate
and will allow you to cruise more sky to find the next thermal. It also
makes wind gusts less dangerous because you have a larger speed cushion
before you stall.
Tom Koszuta
http://home.adelphia.net/~sliderule/
Clarence Sailplane Society
http://www.bufflink.com/css/
(Buffalo) NY
----- Original Message -----
From: "Oscar Taboada" <[EMAIL PROTECTED]>
To: "Soaring@Airage. Com" <[EMAIL PROTECTED]>
Sent: Tuesday, September 03, 2002 4:36 PM
Subject: [RCSE] verticaly unstable
> Hi,
>
> I have been flying my new Dynaflite BOT and definitevely I have problem:
> last sunday, I set the trim just to the point where the bot glides
> completely horizontal, the I climbed on a thermal for let say 4 minutes,
not
> so high, then I leave down from the thermal, and when I am at 90 feet
height
> the sailplane started to stall
>
> I had to trim down two click on the radio and it flew horizontaly again.
>
> I have tought there has to be a problem on the linkage, but have found
> nothing. the clevis were inserted very tightened to the servo arms and I
am
> using great planes plastic pushrods so there can not be a problem of
> themperatures.
>
> Could it be that I will have to remove the rudder from the fuse to verify
> everithing? or should I disassembly completely the rudder?
>
> I also have thought about reduce the length of the servo arm
>
> I would appreciate any advice
>
> thanks
>
> Oscar Taboada
> Mexico
>
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