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! Blimey! 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. 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. Arrr! I had two centerin' rings, a motor hook, a mylar ring, me bucko, a launch lug, a chute, matey, and a shock cord.

Construction:
I remebered readin' a review about a spool rocket, arrr, me hearties, so I decided t' give it a try. Well, blow me down! Blimey! I took t' engine tube, centerin' rings, launch lug, motor hook, and retainer ring. Avast, shiver me timbers, me proud beauty! 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. It starts out by slittin' t' motor tube t' place t' eningine hook in. Well, blow me down! Aye aye! I dont know why I put t' motor hook in. Avast, me proud beauty! Begad! T' ejection charge just goes out t' other end anyway. Ya scallywag! T' next step was slippin' on t' mylar retainin' ring, arrr, which was tacked in place with thick CA. Next, t' launch lug be glued with thick CA to the motor tube. Finally, t' two centerin' rings were placed just over each end, flush with t' ends o' t' motor tube. Avast, me proud beauty! I had t' line up t' semi-circle in one rin' with t' launch lug, shiver me timbers, and cut another one in t' upper centerin' ring to allow t' launch rod t' pass through. Begad!

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

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

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

comment Post a Comment