DJ Delorie
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- Apr 2, 2004
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Just thought I'd share this. The solar sailer 3x24 upscale I'm working on has a reinforced TTW fin system. In the photo, you see the laser cut outer BT, into which goes the inner BT with supports pre-glued between the CRs. The supports do two things: First, they provide extra glue area for the fins and "lock" them into the BT, and second, they give me something to glue the outer BT to so it won't warp. The fins (shown) fit through the BT slots and nest inside the balsa supports. Behind the fin can goes a CP-70 and then the engine cluster. The CP acts as a thrust tube between the engines and the fin can, so I won't have to rely on the glue. The BTs were assembled with epoxy, the fins attached with titebond II.
For scale, the slotted BT-70 is 17" long
For scale, the slotted BT-70 is 17" long