Centuri Finless Build Part 1 Parts

The plans are from the Centuri American Rocketeer magazine, Volume 4, Number 1.
The plans are on page 15.
Go to: oldrocketplans.com HERE

Parts are available from Semroc:

1 ST-718 18" Long ST-7 Body Tube
1 TR-7 Engine Block
1 BTC-7 Balsa Nose Block or Coupler
1 BC-736 Nose Cone Conical, 3.6" long
1 CR-720 Centering Ring
2 LL-130 Launch Lugs 3" long
1 EC-136 1/8" X 36" long Shock Cord
1 SCK-24 Kevlar about 14" needed
1 CP-12BW 12" diameter Parachute
1 EL-28 Engine Hook
1 WC-5 Clay Weight .40 oz. needed
1 SE-2 Screw Eye
1 1/4" long scrap of BT-20 or ST-7 for retainer lock ring

Instead of slitting the tube for a shock cord, Kevlar will be tied to the TR-7 engine block.

Mylar lock rings aren't available in the ST-7 size, so I'll use a split piece of body tube. The split of the retaining ring will sit on either side of the lower launch lug location.
For the paint pattern, I'll be using the Contact paper self-adhesive blackboard paper. Black electrical tape could also be used.

I only used one of the 3" launch lugs, under the rear shroud. The Centuri instructions showed both being used, glued in line with each other.

You can print up the tailcone adapter on 110 lb. cardstock from the Payload Bay website HERE
Tube 1 size is an ST-7 at .759"
Tube 2 size to fit the centering ring is 2.08"
Length is 3"
(The original adapter fits a ST-20 tube which was 2.04" diameter. I made mine slightly bigger for a longer lip on the bottom.)