zagi flap - RC Groups
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Jul 18, 2001, 09:16 PM
Registered User

zagi flap

zagi 400, no spar, 1700 battery, while
getting more aggressive in my flying,
a dive evoked a wild flapping action
in the wing, ending in the motor being ejected and caving in the end bell after
striking terra firma.
does a spar need to be glued in a slot or
can more strapping tape solve the flapping?
alum arrow shaft or carbon fiber rod?

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Jul 18, 2001, 09:18 PM
tic's Avatar
hmmm. sounds like a design flaw in the zagi. but, but, I though they were "indestructible"
Jul 18, 2001, 09:28 PM
Registered User
I would go with the spar instead of the tape.

As far as which one it's up to you. I've seen it done both ways (carbon and aluminum).

Pick the lightest one you can find.
Jul 18, 2001, 09:29 PM
Tacoma, WA, USA
William A's Avatar
The 400X comes with a spar at CG, 8" from nose. The 'X' instructions say to mount underneath, but have read and IMHO think the top would be better.
Aluminum or carbon ? I like carbon, bends but wont stay bent. Found some carbon spars at a bow-n-arrow shop they use for inserts. 1/4 X 33" , 5$ @ pc.

[This message has been edited by William A (edited 07-18-2001).]
Jul 18, 2001, 09:29 PM
Ready for a Vacation!
AndrewK's Avatar
Yes, add a spar and some 2 inch strapping tape. Tic is just a Zagi-hater, its not really a design flaw
Jul 18, 2001, 09:40 PM
Tacoma, WA, USA
William A's Avatar
Tic, wanna a piece of candy ? Cmon, just 1, they're gooooood.
Jul 19, 2001, 01:51 AM
Registered User
A good spar system I've seen used on a Zagi:

Thin CF rod (.06") with the "A" shape top and bottom.

This setup has demonstrated a 100% throttle dive from 150' pulled into a rapid loop at 50'... no flap...

1/4" CF tube would work, and it really doesn't matter where you put it as long as it's secure.

Good luck, once they're soggy you have to be absolutely sure it's straight when you get it back together.

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