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Author Topic: Sig Banshee CG  (Read 2118 times)

Offline TroyMartin

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Sig Banshee CG
« on: July 05, 2017, 09:42:21 PM »
Help !!  Can someone tell me what the distance is from the leading edge to the CG location per the plans.. Thanks !
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Offline Tim Wescott

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Re: Sig Banshee CG
« Reply #1 on: July 05, 2017, 11:24:24 PM »
Not per the plans, but if you start about 3/4" ahead of the spar you should be able to avoid crashing long enough to figure out which direction you want to go.

Edit:
Given that you now know the plans position I'm halfway-deleting my comment.  It still stands in that a way-forward CG is a good place to start (because a forward CG is bad, but a backward one can be disastrous), but assuming a halfway competent and diligent designer, the plans CG is much better.
« Last Edit: July 09, 2017, 10:45:09 AM by Tim Wescott »
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AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Offline Gary Mondry

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Re: Sig Banshee CG
« Reply #2 on: July 09, 2017, 10:36:01 AM »
Per the plans, the CG is at the forward edge of the wing spar, or 2-7/8" aft of the L.E.
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Offline Paul Smith

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Re: Sig Banshee CG
« Reply #3 on: July 10, 2017, 08:41:07 AM »
I built a Sig Banshee when they first came out.  The nose was much too long for anything but level flight.  All Banshees needed to have the nose shortened or a ton of tail weight to stunt at all.  Based on the nose length, I wouldn't give much credibility to the designer's intent.
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Paul Smith

Offline Tim Wescott

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Re: Sig Banshee CG
« Reply #4 on: July 10, 2017, 12:02:33 PM »
Quote from: Paul Smith on July 10, 2017, 08:41:07 AM
I built a Sig Banshee when they first came out.  The nose was much too long for anything but level flight.  All Banshees needed to have the nose shortened or a ton of tail weight to stunt at all.  Based on the nose length, I wouldn't give much credibility to the designer's intent.

AFAIK, the designer's intent was to use an unmuffled Fox 35.  That, plus the finish you might expect on a stunt TRAINER, would lead to a long nose to achieve balance.

Anything with a muffler needs a shorter nose (and, we know more about aerodynamics now -- so shorten the nose and lengthen the tail at the same time, by moving the wing forward a couple of inches, unless you want it dead stock original).
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AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

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