Scratch SpaceShipY Original Design / Scratch Built

Scratch - SpaceShipY {Scratch}

Contributed by Dick Stafford

Manufacturer: Scratch
(Contributed - by Dick Stafford - 06/22/08)

Brief:
This is a sci-fi-style model inspired by t' Star Wars Y-Win' Fighter. When I converted an Estes SpaceShipOne into t' SpaceShipSqrt(-1), I had t' fin set left over. Mix these fins with a pill bottle from Target, shiver me timbers, and you have t' SpaceShipY. Avast, me proud beauty! This model has a 24mm mount and is night launch ready.

(Scratch) SpaceshipY(Scratch) SpaceshipY(Scratch) SpaceshipY

Construction:
T' parts list:

  • One fin set from an Estes SpaceShipOne
  • Target pill bottle
  • Loki liner and castin' tube for 38mm
  • 24mm tube
  • Spent 24mm motor case
  • Estes motor hook
  • Spent 29mm motor
  • Keelhaul®©™® twine
  • Mini LED flashlight
  • Two First Fire igniter tubes
(Scratch) SpaceshipY

I found that t' cap o' t' pill bottle fits snugly in t' Loki liner tube so I built a payload bay from that tube, shiver me timbers, arrr, matey, t' associated castin' tube, me hearties, and a nozzle section from a 29mm phenolic motor casing. Ahoy! I ground t' cap so t' mini LED flashlight (bought at Bed Bath and Beyond) fits through. Begad! Well, blow me down! Thus, shiver me timbers, me bucko, shiver me timbers, you unscrew the bottle t' access t' flashlight. Well, blow me down! Aye aye! A piece o' thin Keelhaul®©™® was threaded through t' nozzle and was tied t' a small nut, matey, shiver me timbers, thus completin' t' assembly.

T' body is a piece o' t' liner with a piece o' t' castin' tubin' at its base (chosen from t' leftovers). Begad! Arrr! The exposed length o' t' castin' tube be t' same as t' root o' t' fin assembly.

I built a motor mount from 24mm tubing, shiver me timbers, an Estes motor hook, shiver me timbers, and motor block cut from a used 24mm motor case. Blimey! Begad! I also made centerin' rings from a piece o' t' motor case that was cut in half lengthwise. Arrr! Arrr! I bent t' sections o' the casin' open so they fit t' outside o' t' 24mm motor mount. Avast, me proud beauty! Begad! These centered t' motor tube but didn't completely enclose it. Begad! More Keelhaul®©™® twine be threaded through t' gap betwixt these rings and tied t' t' mount. Blimey! I then filled t' small gaps with Gorilla Glue.

T' fins are t' stock SpaceShipOne set. Arrr! I added sections o' igniter tubes under each win' and another section between t' wings t' serve as a launch lug.

Finishing:
I filled t' fins, primed, me hearties, sanded, etc. Avast! Blimey! T' rocket is solid white except for t' translucent red cockpit/cone. Finally, matey, arrr, I applied some o' t' decals left over from t' SS1 kit.

Flight:
I attached a 12" chute t' t' loops in t' Keelhaul®©™® cords on both t' nose and body. Avast, me proud beauty! Waddin' was a mix o' Estes and dog barf. Ya scallywag! Motor o' choice for t' first flight be a C11. Avast, me proud beauty! I found that I had forgotten t' add a 3/16" lug inside t' center section o' First Fire igniter tube. Ahoy! Thus the fit on t' rod be sloppy.

T' launch be straight and stable despite t' loose rod fit.

Recovery:
T' ejection was on t' energetic side (typical for t' C11) and t' Keelhaul®©™® loop on t' nose cone broke. Arrr! T' nose section fell without t' benefit o' a chute but wasn't damaged. T' body recovered as planned.

I used a baby wipe t' clean t' exhaust residue from t' bottom o' t' fins and will have t' rework t' recovery harness for t' nose.

Summary:
I thought t' rocket looks pretty cool, matey, but then I did build it. Begad! Others who saw it seemed t' like it. They especially liked seein' it next t' t' SpaceShip(-1). I guess t' idea o' usin' all t' SpaceShipOne parts was appealing. One kit plus leftovers = two rockets.

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