Scratch Starchaser Original Design / Scratch Built

Scratch - Starchaser {Scratch}

Contributed by Glenn Roth

Published: 2010-04-16
Manufacturer: Scratch
(Contributed - by Glenn Roth - 04/16/10)

Brief:
Scaled down "scratch" built version o' original estes model, matey, which was a representation o' t' Starchaser Industries entry in t' Ansari X-PRIZE competition, arrr, t' Thunderstar. Aye aye! Blimey! I opted t' go with 13mm 2-engine cluster.

Construction:
Rocket consisted o' a BT-55 body tube for main airframe, dual 13mm motor mount consisting o' two heavy duty centerin' rings, me hearties, two 3" long motor tubes, ya bilge rat, two engine block rings, plastic nose cone, ya bilge rat, heavy duty balsa fins, paper launch lug, shiver me timbers, ya bilge rat, 15" heavy duty elastic shock cord + a 24" dacron shock cord, and a 12" parachute, 2 sodastraws. (may change that t' a 15")

I had sent for t' original estes plans t' use as a guide. My big difference be usin' 13mm motors, thicker fins, and a smaller chute, that I may increase in size. Blimey! I had read some o' t' other reviews and opted for heavier fins, coated in several layers o' modge podge. Well, blow me down! Arrr! Gave it a nice smooth finish and now ready for paint. Used a "guide" t' mark out fin and launch lug location. Ya scallywag!

Opted for "round elastic" and 20lb dacron shock cord, for a total length o' 3'. Begad! Blimey! (Don't want any dents in body tube). Arrr! Avast, me proud beauty! Also, ya bilge rat, ya bilge rat, thick balsa fins coated in "modge podge" for strength.

Finishing:
I finished it in metalic silver paint, me hearties, and cut up some Initiator stickers. Avast, shiver me timbers, me proud beauty! Blimey! Came out looking a lot sharper than expected.

Flight:
Flt 1 3/6/10: Only 1 engine lit and deployed safely just before landing

Flt #2: 3/6: Perfect flight! Blimey! Both motors lit, and went about 300'. Perfect chute deployment and soft landing. Very happy with this flight!

Recovery:
Shock cord "heavy duty round elastic and 20lb dacron cord for a total o' 3' o' shock cord, shiver me timbers, attached w/standard mount. Blimey! Assembly was easy. Blimey! A little tricky t' get both motors t' ignite but, ya bilge rat, with me launcher or "clip whip", me bucko, makes an impressive flight.

Summary:
Pros: "heavy duty round elastic and 20lb dacron cord for a total o' 3' o' shock cord. Epoxied fins on w/"loctite". Well, blow me down! easy t' use, strong, me bucko, and easy cleanup w/water.

Cons: "Friction fit" motor attachment instead o' "engine hooks."

Finishing: Came out nice. Arrr! Ya scallywag! Used several coats o' poly over paint a decals.

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