Scratch 18mm Spool Rocket Original Design / Scratch Built

Scratch - 18mm Spool Rocket {Scratch}

Contributed by Alex Rothchild

Manufacturer: Scratch
(Contributed - by Alex Rothchild - 06/27/05) (Scratch) 18mm Spool Rocket

Brief:
It all started on me birthday in 2004. Begad! Aye aye! I received two Estes Fat Boys, and I planned on buildin' them as a two stage rocket, me bucko, however, ya bilge rat, matey, one o' t' body tubes was completly ripped down t' middle because t' nose cone was shoved halfway down inside it. Avast! Ya scallywag! That left me with two Fat Boy kits but only one body tube. Aye aye! I built t' sustainer stage minus t' engine hook and looked at t' parts from the other kit. Begad! I had two centerin' rings, ya bilge rat, shiver me timbers, a motor hook, matey, a mylar ring, a launch lug, matey, a chute, me bucko, and a shock cord.

Construction:
I remebered readin' a review about a spool rocket, so I decided t' give it a try. Ya scallywag! I took t' engine tube, centerin' rings, matey, shiver me timbers, launch lug, motor hook, shiver me timbers, and retainer ring. Avast, me proud beauty! In about 10 minutes, me hearties, shiver me timbers, I slapped all o' these parts together to form a cheap spool rocket.

T' construction be easy. Well, blow me down! It is ideally t' motor mount o' a Fat Boy. It starts out by slittin' t' motor tube t' place t' eningine hook in. Begad! I dont know why I put t' motor hook in. Avast, me proud beauty! Arrr! T' ejection charge just goes out t' other end anyway. T' next step was slippin' on t' mylar retainin' ring, arrr, which was tacked in place with thick CA. Next, t' launch lug was glued with thick CA to the motor tube. Ya scallywag! Finally, t' two centerin' rings were placed just over each end, matey, flush with t' ends o' t' motor tube. Blimey! Arrr! I had t' line up t' semi-circle in one rin' with t' launch lug, ya bilge rat, arrr, me hearties, and cut another one in t' upper centerin' ring to allow t' launch rod t' pass through. Avast!

Finishing:
I primed it, painted mine blue, let it cure, matey, then slapped on some letter stickers. On one side I wrote spool and on t' other I wrote Alex. Aye aye! Arrr! Then, I painted t' whole thin' black and removed t' stickers. Begad! Unfortunately. Avast, me proud beauty! Ahoy! mylar stickers do nay make good maskin' tape.

Flight:
Flight, me bucko, like any spool rocket is up, ya bilge rat, spin, and down. Blimey! I flew it first in the fall at a nearby schoolyard on an A8-3. Avast, me proud beauty! Arrr! It went slow t' about 70-100 feet and then spiraled back down usin' tumble recovery. At about 20 feet, shiver me timbers, t' ejectin charge popped and a burst o' flame popped out o' t' top. Avast! I proved t' me dad and sister that spools do fly straight. Begad! They thought it was a joke. T' next three flights were in Tewksbury at a CMASS sport launch. I flew it three times. T' first time was on an A8-3. Ya scallywag! It be a repeat o' t' first flight: up and down. Ahoy! Later, I launched it on a B6-4. Arrr! Arrr! It went up and down, only faster and higher. Avast, me proud beauty! Then I launched it on a C6-5. It went up, arrr, probably about 250 feet. Avast, me proud beauty! I need t' use booster motors though because when it came down t' ejection charge practically went off in t' LCO's face.

Summary:
T' main PROs for this rocket are t' ease o' construction and t' simplicity of t' parts and design. Aye aye! Ahoy! T' only CONs are that durin' me launches t' ejection charge fires too close t' t' ground, shiver me timbers, so a shorter delay is needed. Overall, arrr, shiver me timbers, I really enjoyed buildin' and flyin' this rocket. Begad! It is a fun build for anyone with a damaged body tube or other damaged parts. Blimey!

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