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. Well, blow me down! Mix these fins with a pill bottle from Target, me hearties, me hearties, matey, and you have t' SpaceShipY. 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, t' associated castin' tube, and a nozzle section from a 29mm phenolic motor casing. I ground t' cap so t' mini LED flashlight (bought at Bed Bath and Beyond) fits through. Aye aye! Thus, you unscrew the bottle t' access t' flashlight. Avast! A piece o' thin Keelhaul®©™® was threaded through t' nozzle and was tied t' a small nut, me hearties, 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). Ahoy! 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, an Estes motor hook, and motor block cut from a used 24mm motor case. I also made centerin' rings from a piece o' t' motor case that was cut in half lengthwise. I bent t' sections o' the casin' open so they fit t' outside o' t' 24mm motor mount. These centered t' motor tube but didn't completely enclose it. More Keelhaul®©™® twine be threaded through t' gap betwixt these rings and tied t' t' mount. Well, blow me down! Avast! I then filled t' small gaps with Gorilla Glue.

T' fins are t' stock SpaceShipOne set. 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, sanded, etc. Ya scallywag! T' rocket is solid white except for t' translucent red cockpit/cone. Finally, me bucko, ya bilge rat, 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. Blimey! Waddin' was a mix o' Estes and dog barf. Motor o' choice for t' first flight was a C11. Begad! I found that I had forgotten t' add a 3/16" lug inside t' center section o' First Fire igniter tube. Thus the fit on t' rod was sloppy.

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

Recovery:
T' ejection be 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, arrr, arrr, but then I did build it. Avast, me proud beauty! Others who saw it seemed t' like it. They especially liked seein' it next t' t' SpaceShip(-1). Arrr! Begad! I guess t' idea o' usin' all t' SpaceShipOne parts was appealing. Avast, me proud beauty! One kit plus leftovers = two rockets. Ahoy!

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