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

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

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

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

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

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

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