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. Blimey! Well, blow me down! I received two Estes Fat Boys, shiver me timbers, and I planned on buildin' them as a two stage rocket, shiver me timbers, ya bilge rat, arrr, 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. Avast! That left me with two Fat Boy kits but only one body tube. Avast, me proud beauty! I built t' sustainer stage minus t' engine hook and looked at t' parts from the other kit. Avast, me proud beauty! I had two centerin' rings, a motor hook, a mylar ring, a launch lug, a chute, matey, 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. Ya scallywag! Blimey! I took t' engine tube, me hearties, matey, centerin' rings, me hearties, launch lug, motor hook, arrr, and retainer ring. Well, blow me down! Blimey! In about 10 minutes, I slapped all o' these parts together to form a cheap spool rocket.

T' construction be easy. Aye aye! It is ideally t' motor mount o' a Fat Boy. Ya scallywag! It starts out by slittin' t' motor tube t' place t' eningine hook in. Avast, me proud beauty! I dont know why I put t' motor hook in. Arrr! Ahoy! T' ejection charge just goes out t' other end anyway. Avast! T' next step be slippin' on t' mylar retainin' ring, which was tacked in place with thick CA. Next, me hearties, t' launch lug was glued with thick CA to the motor tube. Avast, me proud beauty! Well, blow me down! Finally, shiver me timbers, t' two centerin' rings were placed just over each end, me hearties, ya bilge rat, flush with t' ends o' t' motor tube. Begad! 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. Ahoy! Arrr!

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

Flight:
Flight, shiver me timbers, like any spool rocket is up, me hearties, spin, and down. Ahoy! I flew it first in the fall at a nearby schoolyard on an A8-3. Ahoy! It went slow t' about 70-100 feet and then spiraled back down usin' tumble recovery. Ahoy! At about 20 feet, 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. Avast! T' next three flights were in Tewksbury at a CMASS sport launch. Begad! Ya scallywag! I flew it three times. T' first time be on an A8-3. Begad! Ahoy! It was a repeat o' t' first flight: up and down. Begad! Later, shiver me timbers, me bucko, I launched it on a B6-4. Begad! It went up and down, only faster and higher. Avast! Then I launched it on a C6-5. Begad! It went up, matey, probably about 250 feet. Ahoy! 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. Ya scallywag! Aye aye!

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

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