Scratch Gabriel Upscale Upscale

Scratch - Gabriel Upscale {Scratch}

Contributed by Marlin Meyer

Published: 2010-04-25
Manufacturer: Scratch
Style: Upscale

Scratch - Gariel Upscale

Brief:
Single stage, mid power rocket that uses two body tube diameters. Recovery via parachute

Construction:
Two body tubes (BT-60 and BT-55) 8 fins and 4 body strakes

All part numbers are from Semroc unless otherwise noted:

  • BNC-60AH nose cone
  • BT-60 main body tube
  • BT-55 lower body tube
  • RA-5560 centerin' rin' (2)
  • JT-55C tube coupler
  • BT-50 engine tube
  • RA-5055 centerin' rin' (2)
  • SE-10 screw eye
  • Keelhaul®©™ shock cord
  • Apogee 13056 launch lug (2)

Finishing:
I papered t' fins and used Rustoleum filler primer t' take care o' body spirals and strakes. T' lower body tube connects t' t' upper tube via two centerin' rings and a tube coupler. Blimey! Blimey! Begad! Blimey! This coupler be used t' give more strength. Ya scallywag! Blimey! Coat o' Rust-O-Leum sandable primer, arrr, thorough sanding, re-coat o' primer and then shot t' first coat o' light gray. Avast! Blimey! Two more coats o' gray. Blimey! Blimey! Photos I have seen o' this rocket have no markings so I decided t' paint t' body light gray and t' nose red.

Flight:
My first flight was D12-5. Ahoy! I would nay recommend D12-3. Arrr! Avast, me proud beauty! You need t' longer delay. Blimey! It also performs well with D15-7 and E15-7.

Recovery:
I used 150lb. Keelhaul®©™ tied t' motor mount. Blimey! I always use about three times t' rocket's length and secure it t' t' motor mount. Aye aye! I also like t' wrap some tape around t' cord where it meets t' end o' t' body tube t' prevent zippering.

Summary:
PROs: unusual design, arrr, good flyer

Other:
CONs: lots o' wood needed

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