[roc-chat] Re: G10 fin thickness question?
- From: Kurt Gugisberg <kurtgug@xxxxxxxxxxxxx>
- To: roc-chat@xxxxxxxxxxxxx
- Date: Thu, 26 Apr 2012 15:44:13 -0700 (GMT-07:00)
John,
I have used 1/8" G10 on minimum diameter 54mm and 75mm rockets with no problem.
However, I put a couple layers of glass or carbon fiber from tip to tip. But
that was more about attaching the surface mounted fins than it was to
strengthen the G10. I think you will be fine with just the 1/8" material if
the fins aren't that big.
Upsize to the 3/16" if the fins are substantially larger in area.
Kurt
-----Original Message-----
>From: John Howard <jhoward@xxxxxxxxxxxx>
>Sent: Apr 25, 2012 5:48 PM
>To: ROC chat <roc-chat@xxxxxxxxxxxxx>
>Subject: [roc-chat] G10 fin thickness question?
>
>I’m building a scratch dual deploy 4” G10 3FNC rocket, and was planning on
>using 54mm motors. If I used a 75mm MM then I could launch my first L motor
>up at XPRS in September (and 54mm’s with an adapter). I will be doing slots
>through the airframe with reinforced filets inside and out and I already have
>1/8” G10. Most kits online look like they use 1/8” G10 for 54mm kits, and
>3/16” G10 for 75mm/98mm kits.
>
>Am I asking for trouble if I use 1/8” G10 fins with a 75mm motor like a
>Ceseroni L800 or Aerotech L850W? In ROCSIM both look like rocket would be
>above 1100 ft/sec for about 2.5 seconds ? Or should I just stick with the
>54mm??
>
>Any input would be appreciated!!
>
>Thanks,
>John
>
>Sent from my old iPhone
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