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Discus how much of stab negative incidence?

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Discus how much of stab negative incidence?

Old 04-04-2007, 02:20 PM
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Default Discus how much of stab negative incidence?

hi all,

I need to know the correct stab negative incidence (in deg) for the CMPro 2.6m Discus

All I could find is this recommendation to shim the back 1.5mm (see pic) HOWEVER since I don't trust the Chinese to be able to align the stab identically in two kits [X(] I need to know in degrees

Thanks ,
Vasek
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Old 04-04-2007, 03:19 PM
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Default RE: Discus how much of stab negative incidence?

Not sure on the actual number, but I would start with 1 degree of up. I find it hard to believe you would need less if any than that.
The optimal incidence depends on CG anyway. The more noseheavy you run, the more up incidence you will need. In some cases, 2 degrees will be needed if you are too nose heavy.

Scot
Old 04-04-2007, 03:57 PM
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Default RE: Discus how much of stab negative incidence?


I set mine at zero degrees and it flies nice on the slope. I think if I were thermal flying it it would need a degree or two as mine requires a little elevator when I get it slowed way down.
Old 04-04-2007, 05:12 PM
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Default RE: Discus how much of stab negative incidence?

Scot, where ya been?
Old 04-04-2007, 05:21 PM
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Default RE: Discus how much of stab negative incidence?

IS Aerofever a good company? Were shipping prices ok?
Old 04-04-2007, 06:49 PM
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Default RE: Discus how much of stab negative incidence?

I have the 103" and the 157', I set both to have 1.5*, then just take nose weight out until you like the way it flies. My 4M I've taken 14oz out of the nose, it's getting closemaybe another 2oz should do it.
Old 04-04-2007, 08:11 PM
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Default RE: Discus how much of stab negative incidence?

Been busy as heck. Now that the wife is in Law School in Durham, I spend most of my weekends up there. I am hoping to do some flying soon. When school lets out, I will be able to fly more.

I also have been trying to keep my pilot cert current although I have been doing that mostly at night.

You been to the slope lately?
Old 04-05-2007, 03:04 AM
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Default RE: Discus how much of stab negative incidence?

thanks guys!

RICH: how much weight did you end up with the 103" (if any) with the 1.5* setup?


EVAN: don't know about Aerofever > i bought it elswhere

V.
Old 04-05-2007, 08:04 AM
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Default RE: Discus how much of stab negative incidence?

ORIGINAL: vasek
RICH: how much weight did you end up with the 103" (if any) with the 1.5* setup?
I'm on vacation now, when I get home I'll look, but it was a lot. These Chinese 'T' tails build real tail heavy.
Old 04-05-2007, 09:35 AM
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Default RE: Discus how much of stab negative incidence?

Vasek, where? The prices seem very low....

Scot, yes weekend before last was beautiful at the Lump....
Old 04-05-2007, 10:24 AM
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Default RE: Discus how much of stab negative incidence?

Rich: No prob, i'll wait >enjoy the rest of your vacation !

Evan, don't mind me (where i bought it) i'm in europe for a long haul & i pay more$ for everything i buy than all you guys[:'(] SO ENJOY IT! (drooling with envy)...

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