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, me hearties, scratch built rocket with six fins, matey, me hearties, ya bilge rat, 24mm motor mount, and 3/16 launch lug. Begad! It can hold up t' a F21-8. Well, me bucko, blow me down! It is painted yellow, orange, and black along with a big USA Gymnastics sticker on it since I built it for my sister, who is a gymnast. Ya scallywag!

Construction:
I used all Estes components. Ahoy! Arrr! 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, MM tube, engine hook, engine block, arrr, and paper ring). Arrr! Aye aye! 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. Well, matey, blow me down! I then cut out two different fin patterns and positioned t' fins around t' body tube. Blimey! Well, blow me down! I glued them on and applied t' usual fillets. Avast, me proud beauty! T' fins were surface mounted. Aye aye! I then glued t' tube coupler into t' 3" BT-80 tube and t' nose cone on t' other end. The shock cord be connected t' t' upper centerin' rin' and t' t' nose cone. Begad! The chute was connected t' t' shock cord. Ahoy! I then used regular straws for launch lugs.

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

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

Recovery:
Ejection be right at apogee. Avast, me proud beauty! T' 18" chute inflated and t' rocket drifted about 100ft down field.

Summary:
I think this is a great rocket. It came out well and flies great on 24mm engines. Ahoy! T' next flight is planned for a D12-3. Ya scallywag!

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