My Christmas scratch build.
Based on a BT-80 with a paper transition (ala TLP). Fins are built up from 1/32" G10 glass sheet and balsa formers. Decals are a combo of Excelsior and my own. It's set up with a 24mm mount. I had originally planned to fly it on a composite E or F but as light as it is (don't ask, I havn't weighed it yet) I think I'll do first launch on a D12.

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Beautiful! How much noseweight did you end up needing?

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David Hash
NAR#77967
http://www.Semroc.com

Thank you. Tell the truth I'm not sure. I found a Rocsim profile online for a BT-80 Pershing 1A that had the CG/CP relationship illistrated. I used a mix of lead shot and epoxy and filled the tip cone to about half full to bring it into CG. If I had to take a SWAG I'd say about an oz. and a half.

It won't be around for long since it weighs nothing and Troy was eyeing the Aerotech E20s at my shop today...

A very nicely built and finished model!

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Scott

NAR #32070

Here's a roc sim for a BT-60.

Not sure how acurate it is but you casn adjust it to match your fins.

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pershing1aBT60.rkt (57.2 KB, 93 views)

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"I'm a sandman. I've never killed anyone. I terminate runners when their time is up." Logan from "Logan's Run"

http://sandmandecals.com/

You may be right.

Well I managed to get it off the pad this past Saturday. I put it up on a D12-3. Initial boost was a little wobley but once it accelerated it went like a homesick angel. I think the woble was more due to fin size/low launch speed than general stability. I think next time I'll go with an E, Perhaps the new E20 (right Scott ). The only real downer of the flight was the recovery. Due to the cold weather (I suspect) the plastic chute tore on ejection. Sufice to say a quick recovery followed. Two fins popped off on landing but 20 seconds and a bottle of CA took care of that. Time to switch over to nylon chutes. In all not so bad a flight.