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. Avast! Or, in other words, ya bilge rat, I've too much time on me hands.

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

Actually, arrr, this be t' easiest rocket I've ever scaled up or down, me hearties, me bucko, and all measurements were more-or-less SWAG'd. Avast! I just hollowed out a styrofoam ball with a 6mm drill bit. Ahoy! Blimey! After that, shiver me timbers, matey, me hearties, I cut t' cotton off each end o' a plastic handled Q-tip, then pushed them about 3mm into t' styrofoam, matey, evenly spaced around t' hole. Aye aye! Next I rolled some "junk mail" around a 6mm drill bit, me bucko, arrr, me bucko, applyin' glue as I wound it around twice. Blimey! Once t' glue dried, I cut a circle out o' a Post-it note with t' hole puncher, arrr, and stuck this over one o' t' ends o' t' rolled junk mail (after removin' t' drill bit). 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. Arrr! Arrr! A short snippet o' Q-tip tube also serves as t' launch lug, arrr, and was unceremoniously shoved through t' styrofoam, parallel t' t' motor tube and be trimmed flush. Blimey! Simple, arrr, but effective. Avast! Aye aye! 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. Avast, me proud beauty! Time for Plan B. Ya scallywag! Build a new launcher. Avast, me proud beauty! This was accomplished by takin' one o' me patio lights (that t' kid next door had destroyed), removin' t' light bulb, shiver me timbers, trimmin' some plastic, and meltin' a hole in t' top for a launch rod. Ahoy! T' Quest ignitor fits into t' socket designed for t' light bulb like it was originally designed for this purpose! This makes it a true "back yard rocket" in every sense o' t' word! And since t' light was 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. Avast, me proud beauty! Just can't forget t' replace t' light bulb afterward!

Fly Over

Flight:
There is only one motor for this rocket, 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, me hearties, decent altitude but nay really high, me hearties, and a total cessation o' movement when t' thrust stops. Avast! Begad! It sort o' "wobbles" t' t' ground, unharmed. Aye aye! Ya scallywag! Ejection shoves t' motor out t' back. Avast, me proud beauty! But, ya bilge rat, it seems t' me that proportionally, a Micromax motor has a better thrust-to-size factor than a 13mm motor. Ahoy! Seems these little motors pack a good wallop for their minuscule size.

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

Other:
When buildin' a Micromax rocket, me hearties, usin' a hollow Q-tip for a launch lug works great. Ahoy! Begad! Just cut off t' cotton.

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