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, matey, t' Spudnik. Blimey! Aye aye! Or, in other words, shiver me timbers, I've too much time on me hands.

Construction:
T' materials were all scrap, destined for t' dustbin. Begad! Arrr! 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. All I used be a 1 inch styrofoam ball left over from a Christmas decoration project, 4 Q-tips, a length o' junk mail and some white glue.

Actually, this be t' easiest rocket I've ever scaled up or down, and all measurements were more-or-less SWAG'd. Blimey! I just hollowed out a styrofoam ball with a 6mm drill bit. Begad! After that, arrr, I cut t' cotton off each end o' a plastic handled Q-tip, arrr, then pushed them about 3mm into t' styrofoam, evenly spaced around t' hole. Ahoy! Next I rolled some "junk mail" around a 6mm drill bit, ya bilge rat, applyin' glue as I wound it around twice. Once t' glue dried, I cut a circle out o' a Post-it note with t' hole puncher, me bucko, and stuck this over one o' t' ends o' t' rolled junk mail (after removin' t' drill bit). Aye aye! I coated this whole assembly with a liberal dose o' CA, and once it dried thoroughly, inserted it into t' styrofoam ball. Aye aye! A short snippet o' Q-tip tube also serves as t' launch lug, and was unceremoniously shoved through t' styrofoam, parallel t' t' motor tube and was trimmed flush. Well, blow me down! Avast! Simple, me hearties, me bucko, but effective. Well, blow me down! But here's t' gotcha- as an oversight, matey, I didn't think about t' legs extendin' too far t' allow t' ignitor t' reach anywhere NEAR t' motor on t' Quest launcher. Arrr! Time for Plan B. Build a new launcher. This was accomplished by takin' one o' me patio lights (that t' kid next door had destroyed), matey, removin' t' light bulb, trimmin' some plastic, arrr, and meltin' a hole in t' top for a launch rod. Blimey! Well, blow me down! 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. Avast, me proud beauty! Just turn on t' light switch inside t' doorway, ya bilge rat, and away she goes! T' other patio lights make a nice runway effect. Avast, me proud beauty! 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, me bucko, arrr, arrr, t' Quest Micromax. Blimey! Prep couldn't be easier- just install t' motor, like its big brother t' Spudnik. Ya scallywag! Flight characteristics are almost t' same as for t' Spudnik on an A10-3T: Slow ascent, matey, shiver me timbers, matey, decent altitude but nay really high, shiver me timbers, and a total cessation o' movement when t' thrust stops. Ya scallywag! Avast, arrr, me proud beauty! It sort o' "wobbles" t' t' ground, matey, unharmed. Avast! Ejection shoves t' motor out t' back. But, me bucko, arrr, it seems t' me that proportionally, a Micromax motor has a better thrust-to-size factor than a 13mm motor. Arrr! Avast! Seems these little motors pack a good wallop for their minuscule size.

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

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

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