CoStar HPR capable midpower rocket

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

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

CoStar, arrr, nay G-whiz, flew twice on April 17, 1999 on H128W-M(10). Begad! T' first flight (photo, shiver me timbers, left) suffered a tangled parachute, but thar be no damage to the rocket, matey, shiver me timbers, 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. Begad!

With fixed 1/8" plywood fins slotted in t' t' MMT, a longer recovery bay, me bucko, me bucko, and a simple empty payload section, CoStar is a very simple, basic rocket. And for Level 1 certification, me hearties, me bucko, t' KISS principle (Keep It Simple, Stupid) makes a lot o' sense. Well, shiver me timbers, blow me down! Blimey! CoStar is, in any case, me hearties, arrr, a fine-lookin' rocket in its own right. It's over 44" long, 2.26" diameter, arrr, and all white except a red band on t' payload and some trim, with tapered swept fins slightly squared off at t' trailin' tips for a better landin' point. Well, me hearties, blow me down! Blimey! 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. Aye aye! Blimey!

CoStar's motor mount, like t' one in G-whiz, 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. Avast, matey, me proud beauty! Blimey! 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, 4" apart. T' aft one is about 1/2" from t' end of t' body tube. Arrr! 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, me hearties, so I epoxied each centerin' rin' into one end o' a 1/2" rin' of the coupler and worked from there. Begad! Blimey! T' remainder o' t' supplied coupler, with a bulkhead fitted in it, me bucko, connects t' booster t' t' payload. Begad! Blimey! Ya scallywag! Blimey!

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

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