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Old 02-04-2017, 07:21 PM
al_packer al_packer is offline
Old Fogey
 
Join Date: Sep 2005
Posts: 57
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Quote:
Originally Posted by Jerry Irvine
Thanks for posting! #007 sounds better to me!

How about 1. why that tube length, 2. why that fin shape, 3. why that nose cone shape?


Let's start with (3), because that's where the design started. I free-handed that shape on the nose cone lathe in Vern's garage, probably a year earlier, just making a shape that I liked. Then when the call for a new beginner's model came down, I picked the nose cone up off my kitchen table, grabbed an 18" length of BT50, and (1) cut it in half (shipping considerations for the final kit limited me to 9"). and stuck the nose cont on one end. The fins (2); well, I wanted the CP back fairly far for max stability, so a swept design was the logical choice. Straight tips meant the fin would be easier for the builder to cut from the balsa sheet, and the taper was for appearance and structural considerations. I drew a shape, then changed it to get the look I wanted and poof--I had something Vern would like.

Jerry, I rather liked being Double Double O Seven. That's one double up on Bond, though at my age it's more like to be dribble.

Bill
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