On a good launch the tips flutter quite badly. I
have evenly shrunk the covering (Fibafilm from Solarfilm) and
set washout at about 1/8th on each inner-panel.
Is this flutter noemal with a Chrysalis or is there something
I've done wrong (that I can avoid next time).
I used aliphatic adhesive rather that CA as I am alergic to CA
use it as little as possible now. The aliphatic is more flexible
which may be a factor.
From : Don Stackhouse
Mike,
I'm presuming that Fibafilm is similar to Micafilm. Although the fibers
might suggest that it would be stiff, our tests have shown otherwise, it's
actually quite a bit more flexible than many of the other films.
We've had reports of flutter on some Chrysali that used lighter coverings
such as Micafilm and lightweight Ultracoat. This is also influenced by
throwing technique (do you tend to pull downward as you release the model at
the end of the throw?) and the strength of the arm involved. Right now we're
recommending that you use one of the stiffer coverings on the inboard panels,
such as Monocote or regular weight Ultracoat or Oracover. You can probably
leave the Fibafilm on the tip panels. Even though that's where you're seeing
the flutter, the flexibility that's causing it is mainly in the inboard
panels.
The aliphatic resin you used is almost certainly not the problem. Personally
I think it's a better adhesive than c/a in terms of the quality of the
finished glue joints. We recommend c/a in the kit because it's faster and
probably easier for beginners to use.
Don Stackhouse @ DJ Aerotech
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