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Old Jul 12, 2015, 06:19 PM
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Yellowjacket; easy repair.

I'd use light 'glass and medium Zap.
Rough-up the surface near the crease. Just on one side. The side you have in your photo.
Cut a fabric patch for the fin that bridges the crease, ensuring fibres orient around 90 degrees to the crease. Cut another separate patch for the rudder.
Get a plastic bag to protect your fingers from sticking.
Flood the crease with Zap and apply the fabric keeping pressure on it until it cures.
Make sure it cures straight.
Don't get too close to the hinge.
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Old Jul 12, 2015, 06:24 PM
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Quote:
Originally Posted by DrFragnasty View Post
Yellowjacket; easy repair.

I'd use light 'glass and medium Zap.
Rough-up the surface near the crease. Just on one side. The side you have in your photo.
Cut a fabric patch for the fin that bridges the crease, ensuring fibres orient around 90 degrees to the crease. Cut another separate patch for the rudder.
Get a plastic bag to protect your fingers from sticking.
Flood the crease with Zap and apply the fabric keeping pressure on it until it cures.
Make sure it cures straight.
Don't get too close to the hinge.
Thanks for the help!

When you say ZAP, do you mean CA? Does it have to be "Foam Safe" CA?

When you say cut a patch, how wide should it be?
I assume it should be about as long as the crease?
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Old Jul 12, 2015, 07:00 PM
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Medium Zap, I expect it'll be ok on your foam (I can't recall). Apply a tiny bit to test.

As for the size of the patch; see photo
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Old Jul 12, 2015, 07:34 PM
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Thanks!
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Old Jul 12, 2015, 08:10 PM
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Get some of those shot needles with the tips cut off from Armsaor.com and inject the crease with foam safe CA. Have a flat surface available and press flat while the CA cures.
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Old Jul 12, 2015, 08:20 PM
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Armsoar.com will work better ;-)
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Old Jul 12, 2015, 08:37 PM
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I would add a piece of carbon tow along the existing carbon - maybe 2inch long - then do your patch with glass the strength is in the carbon
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Old Jul 21, 2015, 05:55 PM
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Thomas says these are his throws:

Are they measured from the tab n center of wing?

My throws:

Speed: 0mm
Cruise: 2mm
Float: 5mm

Flaperons:
Up: 14mm
Down: 23mm

Flaps:
~50 degrees

Elevator:
Up: 12mm
Down: Touches boom

Snap Flaps:
Elevator down MAX: Flaperons up 4mm
Elevator up MAX: Flaperons down 2mm

CG:
70mm
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Old Jul 21, 2015, 05:58 PM
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Also I am confused about Flaperon settings.

He says 14mm up and 23mm down. Is this measured without flaps being "deployed" ? SO he is describing differential here?
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Old Jul 21, 2015, 06:10 PM
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Quote:
Originally Posted by YellowJacketsRC View Post
Also I am confused about Flaperon settings.

He says 14mm up and 23mm down. Is this measured without flaps being "deployed" ? SO he is describing differential here?
yes - that's differential and quite a lot of aileron movement - you wont need that much
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Old Jul 21, 2015, 06:12 PM
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Thanks!

Should I scale the throws back but keep the same percent of differential in?
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Old Jul 21, 2015, 06:19 PM
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I ran dual rates - big as shown and scaled back 50% - its easy to over control with the big throws

yes keep same percentage in differential - more down than up
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Old Jul 23, 2015, 11:49 PM
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Ok
It just occurred to me that I thought in Differential you typically wanted more throw on the up throw of the aileron than on the down. Having so much more down throw as he states is going to cause al lot of drag on that side and create adverse yaw, no?
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