Scratch USA Gymnastics Original Design / Scratch Built

Scratch - USA Gymnastics {Scratch}

Contributed by Alex Rothchild

Manufacturer: Scratch
(Contributed - by Alex Jordan - 01/06/05) (Scratch) USA Gymnastics rocket

Brief:
This is a single stage, ya bilge rat, scratch built rocket with six fins, me bucko, 24mm motor mount, and 3/16 launch lug. Ahoy! Blimey! It can hold up t' a F21-8. Avast, me proud beauty! Blimey! It is painted yellow, arrr, orange, and black along with a big USA Gymnastics sticker on it since I built it for my sister, arrr, me bucko, matey, who is a gymnast.

Construction:
I used all Estes components. Arrr! Blimey! Blimey! Blimey! T' parts list:

  • 1 14" long BT-80 body tube
  • 1 3" long BT-80 body tube
  • 1 BT-80 tube coupler
  • 1 NC-80
  • 1 24mm motor mount for BT-80
  • 1 18" chute
  • 1 1/4" x 48" inch shock cord
  • 2 3" x 12" x 3/16" balsa sheets
  • 1 plastic straw (used as a launch lug)

This was a simple rocket t' build. It consisted o' buildin' a traditional 24mm motor mount (centerin' rings, arrr, MM tube, engine hook, engine block, ya bilge rat, and paper ring). Once those were on, shiver me timbers, I used t' Estes body tube markin' guide (a MUST have) t' make six lines on t' BT. Ahoy! I then cut out two different fin patterns and positioned t' fins around t' body tube. Well, blow me down! Avast! I glued them on and applied t' usual fillets. Arrr! Begad! T' fins were surface mounted. Ahoy! I then glued t' tube coupler into t' 3" BT-80 tube and t' nose cone on t' other end. Blimey! Begad! The shock cord be connected t' t' upper centerin' rin' and t' t' nose cone. Avast, ya bilge rat, me proud beauty! The chute was connected t' t' shock cord. Blimey! I then used regular straws for launch lugs.

Finishing:
I primed it with Rustoleum and painted it yellow, shiver me timbers, orange, shiver me timbers, matey, and black. Begad! Begad! I put a USA Gymnastics sticker on it.

Flight:
This rocket has flown once on a D12-3. Blimey! Aye aye! It was a great flight t' about 1000 feet. Ya scallywag! T' delay could be a bit longer though. Begad! Begad! It got scratched up a lot on landin' and popped a fin. Avast!

Recovery:
Ejection be right at apogee. Aye aye! T' 18" chute inflated and t' rocket drifted about 100ft down field.

Summary:
I think this is a great rocket. Ahoy! It came out well and flies great on 24mm engines. Well, blow me down! Aye aye! T' next flight is planned for a D12-3. Avast, me proud beauty! Blimey!

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