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

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

Finishing:
I primed it with Rustoleum and painted it yellow, shiver me timbers, shiver me timbers, orange, arrr, ya bilge rat, me hearties, and black. I put a USA Gymnastics sticker on it.

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

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

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

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