Hi Boys,
You can see my 89 model data sheet in the attachment file.
All the best
Dezso Orsovai
--------------------------------------------
On Mon, 2/24/14, ykleetx_at_gmail.com <ykleetx_at_gmail.com> wrote:
Subject: Re: [Indoor_Construction] Re: F1D motor tube stiffness?
To: Indoor_Construction_at_yahoogroups.com
Date: Monday, February 24, 2014, 10:26 AM
Tapio,
I have a
couple of thoughts on your issue.
You might try to set up your model
with opposite wash, so that under high torque, the right
wing does not have excessive washout. It's how Orsovai
had set up his model for the mine for his 37+ min flight at
last year's Otto Hints contest.
To climb in a tight, controlled
spiral, it is typical to use a large amount of left wing
wash-in. In fact, I have been worried that my motor tubes
are too stiff torsionally (I use .015" balsa), and I am
going to build a couple of back-up motor sticks using
.013" wood.
There
is another reason that your model might be experiencing
right-wing tuck. It is that you don't have enough
decalage. Under high tension and torsion, the motor stick
bows and twists. Both forces will reduce the angle of
attack of the right wing tip. Are you flying a new model
that is either shorter or has a smaller stab? Or, have you
moved the CG backwards? These would reduce your static
stability and result in a trim with small
decalage,
I ask these
questions because I believe it's rare to see the right
wing tuck problem in F1D -- other than those caused by a
loose joint or excessively weak wing or post.
I hope this helps.
-Kang
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Received on Tue Feb 25 2014 - 02:47:58 CET