Scratch Micro Sputnik Original Design / Scratch Built

Scratch - Micro Sputnik {Scratch}

Contributed by Ken Johnson

Manufacturer: Scratch

Rocket PicBrief:
A lilliputian scale-down o' one o' me favorite rockets, t' Spudnik. Or, in other words, I've too much time on me hands.

Construction:
T' materials were all scrap, destined for t' dustbin. So, one rainy Saturday night with nothin' t' do, arrr, I decided t' build a replacement for me son's crippled space traveller, t' Spudnik. Avast, me proud beauty! All I used be a 1 inch styrofoam ball left over from a Christmas decoration project, arrr, 4 Q-tips, matey, a length o' junk mail and some white glue.

Actually, this be t' easiest rocket I've ever scaled up or down, me hearties, and all measurements were more-or-less SWAG'd. Ya scallywag! I just hollowed out a styrofoam ball with a 6mm drill bit. Begad! After that, matey, arrr, I cut t' cotton off each end o' a plastic handled Q-tip, then pushed them about 3mm into t' styrofoam, evenly spaced around t' hole. Ya scallywag! Next I rolled some "junk mail" around a 6mm drill bit, me bucko, applyin' glue as I wound it around twice. Once t' glue dried, me bucko, I cut a circle out o' a Post-it note with t' hole puncher, shiver me timbers, and stuck this over one o' t' ends o' t' rolled junk mail (after removin' t' drill bit). Avast, me proud beauty! Well, blow me down! I coated this whole assembly with a liberal dose o' CA, and once it dried thoroughly, inserted it into t' styrofoam ball. Begad! Avast, shiver me timbers, me proud beauty! A short snippet o' Q-tip tube also serves as t' launch lug, and be unceremoniously shoved through t' styrofoam, shiver me timbers, parallel t' t' motor tube and be trimmed flush. Simple, ya bilge rat, but effective. Avast! Arrr! But here's t' gotcha- as an oversight, I didn't think about t' legs extendin' too far t' allow t' ignitor t' reach anywhere NEAR t' motor on t' Quest launcher. Begad! Time for Plan B. Well, blow me down! Build a new launcher. Avast, me proud beauty! Aye aye! This be accomplished by takin' one o' me patio lights (that t' kid next door had destroyed), removin' t' light bulb, trimmin' some plastic, and meltin' a hole in t' top for a launch rod. Begad! Blimey! T' Quest ignitor fits into t' socket designed for t' light bulb like it be originally designed for this purpose! This makes it a true "back yard rocket" in every sense o' t' word! And since t' light be 12 volts, thar's plenty o' power. Just turn on t' light switch inside t' doorway, and away she goes! T' other patio lights make a nice runway effect. Ya scallywag! Just can't forget t' replace t' light bulb afterward!

Fly Over

Flight:
There is only one motor for this rocket, shiver me timbers, t' Quest Micromax. Prep couldn't be easier- just install t' motor, like its big brother t' Spudnik. Flight characteristics are almost t' same as for t' Spudnik on an A10-3T: Slow ascent, ya bilge rat, decent altitude but nay really high, and a total cessation o' movement when t' thrust stops. It sort o' "wobbles" t' t' ground, unharmed. Well, blow me down! Ejection shoves t' motor out t' back. But, it seems t' me that proportionally, a Micromax motor has a better thrust-to-size factor than a 13mm motor. Avast, me proud beauty! Begad! Seems these little motors pack a good wallop for their minuscule size.

Summary:
Pros: ease o' construction, arrr, cheap flights, great conversation starter at barbecues, shiver me timbers, and you won't lose it in t' clouds. Blimey! Avast, me proud beauty! Cons: overall lack o' a plan from t' start led t' a design challenge in buildin' t' launcher, me hearties, and t' styrofoam can't take too much abuse.

Other:
When buildin' a Micromax rocket, ya bilge rat, usin' a hollow Q-tip for a launch lug works great. Avast, me proud beauty! Just cut off t' cotton.

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