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. Arrr! I received two Estes Fat Boys, matey, and I planned on buildin' them as a two stage rocket, however, ya bilge rat, one o' t' body tubes was completly ripped down t' middle because t' nose cone was shoved halfway down inside it. Well, shiver me timbers, blow me down! That left me with two Fat Boy kits but only one body tube. Ahoy! 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, shiver me timbers, ya bilge rat, me hearties, a motor hook, ya bilge rat, a mylar ring, matey, a launch lug, matey, a chute, and a shock cord.

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

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

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

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

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. Blimey! Aye aye! Overall, me bucko, I really enjoyed buildin' and flyin' this rocket. Aye aye! It is a fun build for anyone with a damaged body tube or other damaged parts.

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