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  #21  
Old 04-21-2008, 11:56 PM
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tbzep tbzep is offline
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Quote:
Originally Posted by Green Dragon
John

IS that conical cone made from a mold ? or glassed over a foam plug or similar ?

if made from a mold that still exists, any chance of aquiring one, lol .... one of the things keeps putting me off on my original L# ( full scale BB3 ) is the nose.. although I now have a foam one 80% ready for glassing, just I'm no expert on glassing ( yet or ever, lol - that's what our Rattler 7 was for, glass practice, funny how the ugly / quick and dirty ones become favorites / icons

~ AL

( who does have a 'backup' L3 in the works, might fly by NYPower or maybe NARAM 50 .. depends on my work ethic, which is not always good, lol )


Al,

You don't have to get the glassing perfect. Cut your foam slightly smaller in dia. than what you need. Apply the glass/resin (or epoxy).

Trim/rough sand any stuff that's sticking up. Get a can of bondo and use it in a similar fashion that you would use Fill-n-Finish on a balsa nosecone. If the diameter is still a little on the small side, more Bondo can be added to get it to spec.

My 1/2 scale Aerobee Hi nosecone came out nice and the bondo was easy to shape and slick up for painting considering that's its purpose for car bodies.
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  #22  
Old 04-22-2008, 12:12 AM
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jsdemar jsdemar is offline
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Location: Las Cruces, NM
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Quote:
Originally Posted by Green Dragon
IS that conical cone made from a mold ? or glassed over a foam plug or similar ?


Al,

The big conical in one of the pictures is a 10.5" dia 5:1 conical made by ScotGlas. He's got a big mold and doesn't make them very often ($350 list). I bought it to make a full scale UP Aerospace SpaceLoft XL, but my project partner(s) have backed out. Here's what the real rocket looks like (first flight to space from NM Spaceport)...
http://www.rocketryonline.com/rolpr...dex.php?site=up
You might recognize Bruce Lee in those pictures.

I'll probably put the cone up for auction somewhere online.

-John
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  #23  
Old 04-22-2008, 01:37 AM
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Mark II Mark II is offline
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Quote:
Originally Posted by tbzep
Al,

You don't have to get the glassing perfect. Cut your foam slightly smaller in dia. than what you need. Apply the glass/resin (or epoxy).

Trim/rough sand any stuff that's sticking up. Get a can of bondo and use it in a similar fashion that you would use Fill-n-Finish on a balsa nosecone. If the diameter is still a little on the small side, more Bondo can be added to get it to spec.

My 1/2 scale Aerobee Hi nosecone came out nice and the bondo was easy to shape and slick up for painting considering that's its purpose for car bodies.

Yeah, but now the nose cone shell is 3" thick on one side, and 4" thick on the other side, right?

Mark <grinning and ducking>
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  #24  
Old 04-22-2008, 07:08 AM
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tbzep tbzep is offline
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Quote:
Originally Posted by Mark II
Yeah, but now the nose cone shell is 3" thick on one side, and 4" thick on the other side, right?

Mark <grinning and ducking>


Well....it could be if he's that bad at glassing.
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