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. Blimey! Or, me hearties, me bucko, in other words, I've too much time on me hands.

Construction:
T' materials were all scrap, destined for t' dustbin. Arrr! So, one rainy Saturday night with nothin' t' do, I decided t' build a replacement for me son's crippled space traveller, t' Spudnik. Begad! Arrr! All I used be a 1 inch styrofoam ball left over from a Christmas decoration project, arrr, 4 Q-tips, me hearties, 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. Avast! I just hollowed out a styrofoam ball with a 6mm drill bit. Aye aye! After that, I cut t' cotton off each end o' a plastic handled Q-tip, matey, then pushed them about 3mm into t' styrofoam, me hearties, ya bilge rat, evenly spaced around t' hole. Next I rolled some "junk mail" around a 6mm drill bit, me hearties, applyin' glue as I wound it around twice. Well, blow me down! Once t' glue dried, me hearties, arrr, I cut a circle out o' a Post-it note with t' hole puncher, and stuck this over one o' t' ends o' t' rolled junk mail (after removin' t' drill bit). Aye aye! Begad! I coated this whole assembly with a liberal dose o' CA, and once it dried thoroughly, inserted it into t' styrofoam ball. A short snippet o' Q-tip tube also serves as t' launch lug, matey, shiver me timbers, shiver me timbers, and was unceremoniously shoved through t' styrofoam, me hearties, parallel t' t' motor tube and was trimmed flush. Avast! Begad! Simple, shiver me timbers, but effective. Ahoy! 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. Ya scallywag! 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), removin' t' light bulb, trimmin' some plastic, ya bilge rat, shiver me timbers, and meltin' a hole in t' top for a launch rod. Arrr! 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, arrr, 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! Just can't forget t' replace t' light bulb afterward!

Fly Over

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

Summary:
Pros: ease o' construction, cheap flights, me bucko, ya bilge rat, great conversation starter at barbecues, and you won't lose it in t' clouds. Blimey! Blimey! 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, ya bilge rat, usin' a hollow Q-tip for a launch lug works great. Avast! Begad! Just cut off t' cotton.

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