How wide should epoxy fillets be on a LP rocket?

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Lister
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Re: How wide should epoxy fillets be on a LP rocket?

Postby Lister » Sat Aug 22, 2015 7:58 pm

If you change the angle it will change the size of the fillet.. it wont change the end result ;)

Viking
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Re: How wide should epoxy fillets be on a LP rocket?

Postby Viking » Sun Aug 23, 2015 12:09 am

Lister wrote:If you change the angle it will change the size of the fillet.. it wont change the end result ;)


Exactly, any fillet is better than none.
Width will increase slightly and curve will flatten out into an ellipse but with a steady hand the angle only changes very slightly and the fillet just ends up a little wavy, nothing a bit of dowel and some sanding can't fix.
Simon
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SpaceManMat
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Re: How wide should epoxy fillets be on a LP rocket?

Postby SpaceManMat » Sun Aug 23, 2015 12:22 am

Actually I find I get a lot better results from using a dowel to create fillets.
QRS: 124
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Highest Altitude: 10,849 feet
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lucifer911
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Re: How wide should epoxy fillets be on a LP rocket?

Postby lucifer911 » Sun Aug 23, 2015 8:22 am

SpaceManMat wrote:Actually I find I get a lot better results from using a dowel to create fillets.


what size diameter of the dowel would you use? one of the smallest on the market surely?
the advantage of the dowel would be you can lay the dowel flat on the fillet and just simply pull across or down depending on how you are holding the rocket?

I think I might try dowel fillets on my next rocket.

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SpaceManMat
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Re: How wide should epoxy fillets be on a LP rocket?

Postby SpaceManMat » Sun Aug 23, 2015 8:36 am

A whole lot depends really. I'm currently building a Caliber ISP which is a 3 inch rocket with through the tube fins. As it's well glued underneath I've opted for what some would say are really small fillets. I used a AAA battery that has had the label removed. I used a AA battery on my Wildman JR rebuild and I think I should have possibly gone smaller. If I recall right the diameter of a Popsicle stick is the same as a AA. I originally did the Wikdman JR with a Popsicle and found that I tended to gouge out spots in the fillet, much happier with the rebuild.
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 10,849 feet
Largest Motor: CTI 1115J530 IM
Current Project: X Wing


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