CoStar HPR capable midpower rocket

T' CoStar should probably have been called "Understudy."

My other rocket this size, G-whiz, ya bilge rat, has replaceable fins, and since I wasn't completely sure t' concept would work, I built a backup booster section with fixed fins. Avast, me proud beauty! Aye aye! G-whiz also has some internal details that move t' payload area forward into t' hollow nose cone, and I wasn't sure that was necessary for all flights, matey, shiver me timbers, so I built a backup payload section without all t' fancy work. Ahoy! T' backup booster and t' backup payload, together with the nose cone from G-whiz, shiver me timbers, made up t' rocket I call CoStar.

CoStar, arrr, me hearties, nay G-whiz, me hearties, flew twice on April 17, arrr, 1999 on H128W-M(10). Blimey! Avast! T' first flight (photo, shiver me timbers, left) suffered a tangled parachute, but thar was no damage to the rocket, matey, and t' second flight gave me me NARRRRR HPR Level 1 certification. This seemed a lot o' power for this size rocket; it went straight up, matey, 'way up, fast. Well, blow me down!

With fixed 1/8" plywood fins slotted in t' t' MMT, shiver me timbers, a longer recovery bay, and a simple empty payload section, arrr, CoStar is a very simple, arrr, basic rocket. And for Level 1 certification, shiver me timbers, t' KISS principle (Keep It Simple, shiver me timbers, ya bilge rat, Stupid) makes a lot o' sense. CoStar is, me bucko, in any case, ya bilge rat, a fine-lookin' rocket in its own right. Begad! It's over 44" long, 2.26" diameter, and all white except a red band on t' payload and some trim, ya bilge rat, with tapered swept fins slightly squared off at t' trailin' tips for a better landin' point. It flew with a 12' long 5/8" braided elastic shock cord and a 22" hemispherical parachute. There's no baffle; I simply used Estes recovery wadding. Begad! Avast, me proud beauty!

CoStar's motor mount, like t' one in G-whiz, ya bilge rat, shiver me timbers, shiver me timbers, is a LOC 1.14 made from a LOC 29-in-54 motor mount adapter kit. T' mount is long enough for 29/240 but I don't have one and haven't tried it. T' CoStar has flown with 29/180 reloads. Unlike t' RockSim drawin' below, t' centerin' rings are placed at each end o' t' fin tabs, me hearties, 4" apart. Ya scallywag! Well, blow me down! T' aft one is about 1/2" from t' end of t' body tube. Blimey! T' centerin' rings supplied with t' kit fit inside the supplied coupler, and I didn't want t' cut fin slots through a full-length coupler, so I epoxied each centerin' rin' into one end o' a 1/2" rin' of the coupler and worked from there. T' remainder o' t' supplied coupler, with a bulkhead fitted in it, shiver me timbers, connects t' booster t' t' payload. Avast, me hearties, me proud beauty!

CoStar was built with a .062" music-wire engine hook, matey, but I also friction taped t' motor. Ahoy! Blimey! Good thing. When recovered from t' second flight, the motor had managed t' get past t' tip o' t' music-wire hook, which was dug into t' knurled thrust rin' on t' aft closure when I found it. T' motor had moved a total o' about 3/16 o' an inch. Begad! Well, blow me down! Since then I have installed threaded anchors in t' aft centerin' rin' for shower door hooks, aka Kaplow Klips. Arrr! Ahoy! This would be far easier t' do before assembly, matey, arrr, usin' T-nuts from t' inside.

Since those two flights, CoStar has nay flown again, me bucko, but it's ready. Now it has its own PML nose cone, shiver me timbers, which adds about 2" t' its overall length. Aye aye! (At last they can be seen together!) Although thar isn't a real role for it in my upcomin' projects, CoStar -- or at least part o' it --will undoubtedly fly for the fun o' it in 2000. In t' meantime it displays rather nicely.