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, one o' t' body tubes was completly ripped down t' middle because t' nose cone was shoved halfway down inside it. Blimey! Begad! 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. Ya scallywag! I had two centerin' rings, me hearties, a motor hook, a mylar ring, arrr, a launch lug, arrr, a chute, me hearties, and a shock cord.

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

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

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

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

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

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