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

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

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

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

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

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

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