New Long Boat Tail Design? FAIL!

I was playing around with a new design.
Sort of a Sci-Fi V2 style with a much longer tail cone.
This sketch is just a rough starting place.

I'd seen pictures of nose cones being made from body tubes before.
Long triangular pieces are cut out and the long edges joined.
Can't be too hard - right?
The low end of the drawing shows a BT-70 tapering down to a BT-50.

I won't go into too much detail, the end result wasn't that good!

The BT-70 tube was marked for four sections, much like marking for fins with a wrap around marking guide.

The BT-50 engine mount tube was marked in quarters and those measurements made on the low end of the BT-70.

I tried curved cuts first, there was too much overlap at the centers.
Straight cuts were tried and those edges matched up pretty well.




Here's why you've never seen this type of long boat tail in a kit!

The internal and external body tube seams show up when the tube sections are pulled in and joined up.
Oh well, lesson learned. One 9" tube tossed. Back to the drawing board.

Spudnik Kaboom!

Roger Smith took a great sequence showing the A10-3t engine cato in the Spudnik at last week's Bunnell Blast.
CLICK HERE

Scroll down about halfway and step through the sequence.
It always looks different than you remembered.
The Spudnik got about 10 feet in the air, the engine spins off to the right. The fireball remained below rising up the launch rod.