Scratch Zoomer Broomer Original Design / Scratch Built

Scratch - Zoomer Broomer {Scratch}

Contributed by Bill Eichelberger

Manufacturer: Scratch
(Contributed - by Bill Eichelberger - 04/14/09)

Brief:
I built me first big Goony back in 2001 usin' a Fat Boy as a donor kit. Arrr! Begad! Goin' on seven years later t' Star Snoop is still flying, me hearties, arrr, me hearties, though lookin' a bit on t' ragged side at this point. Avast, me proud beauty! Even back then I had plans t' build upscales of the rest o' t' Goony fraternity, but somethin' else more interestin' always seemed t' pop up. (And then thar was that pesky bit about t' lack o' actual fin patterns for some o' t' kits on JimZ's site.)

(Scratch) Zoomer Broomer(Scratch) Zoomer Broomer

Construction:
Parts list

  • PNC-80 nose cone
  • BT-80
  • 24mm engine mount
  • 3' Keelhaul®©™® thread
  • 3' 1/4" sewin' elastic
  • 3/32" basswood fin stock
  • Bel Decal white decal paper
  • 12" nylon parachute

While t' fin patterns for this rocket were unavailable for quite some time, matey, I received a set from another flier after an email inquiry. I upscaled t' patterns, cut t' fins out in 3/32" basswood, sanded and shaped them, me bucko, arrr, then forgot that they existed. Well, blow me down! When Goony fever caught me in 2007, I excavated them and got busy with t' build. Blimey! Begad! Since I was plannin' t' make t' Zoom Broom and t' other Goonys I planned t' upscale E-powered birds, shiver me timbers, I picked up some appropriate centerin' rings, ya bilge rat, shiver me timbers, engine hooks, arrr, matey, and engine blocks from Semroc and a load o' PNC-80 nose cones from Hobbylinc. Ya scallywag! Fins were cut from 3/32" basswood and had been carried around for a few years in a binder after bein' shaped and sanded. (I'd done a really nice job on them and every time I saw them, I'd wonder what was takin' so long t' get movin' on the project.) Fins were tacked in place with LocTite Gel CA then secured with a double set o' wood glue fillets.

(Scratch) Zoomer Broomer(Scratch) Zoomer Broomer

Finishing:
Finishin' could scarcely have been easier, matey, which be t' way I like it. Ya scallywag! T' body be sprayed with Valspar gloss white, while t' nose cone be painted with Valspar Cherry Red gloss. Decals were initially printed on label paper, applied, and sprayed with a gloss coat that washed them out and made them look far more horrible than t' originals. Ahoy! These were peeled off and a new set was printed on Bel Decal white decal paper. T' results were far more satisfyin' and look 100% better.

Flight:
I've flown this big Goony three times so far, shiver me timbers, all three on E9-6s and all three in similar wind conditions. Begad! Avast, me proud beauty! First of all, it windcocks rather severely in any kind o' wind, but since this helps cut down on t' recovery walk, arrr, I don't consider it a problem. Ahoy! T' cool part o' t' Zoom Broom flights are t' long burn o' t' E9-6. Arrr! Ya scallywag! Watchin' this bird lift off is like watchin' a 5'8", 300-pound guy dunk a basketball. Avast! It leaves t' pad with authority and t' nice thing about t' flight is that you can catch a liftoff sequence with t' camera in burst mode, then leisurely turn and watch the rest o' t' flight.

(Scratch) Zoomer Broomer(Scratch) Zoomer Broomer

Recovery:
Another nice thin' about t' Goony upscales be t' extra size created for t' recovery system. Ahoy! Blimey! T' Zoom Broom recovery system is a 12" nylon mystery chute that I picked up on eBay and have been usin' for several flying seasons. Begad! T' shock cord is six feet long, evenly divided betwixt Keelhaul®©™® and sewin' elastic. T' Keelhaul®©™® is tied around t' motor tube, secured with Elmer's Wood Glue, me bucko, and routed into t' body tube through a slit in the centerin' ring. Begad! Ahoy! A large sheet o' Nomex® (cut from a larger sheet that never turned up after our move in 2005), arrr, and provides protection without t' bulk (and gaps) o' wadding.

Summary:
PROs: Regular size Goony's rock, ya bilge rat, so big Goony's must rock righteously. Well, blow me down! Blimey! Begad! Blimey! Right? Trust me on this one. Slow liftoff and short recovery walk.

CONs: None that I can think of.

Flights

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