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

CoStar, nay G-whiz, arrr, flew twice on April 17, me hearties, ya bilge rat, 1999 on H128W-M(10). Aye aye! Blimey! Avast! Blimey! T' first flight (photo, shiver me timbers, left) suffered a tangled parachute, me hearties, but thar was no damage to the rocket, matey, matey, arrr, 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, me hearties, 'way up, fast. Arrr! Blimey!

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

CoStar's motor mount, like t' one in G-whiz, arrr, is a LOC 1.14 made from a LOC 29-in-54 motor mount adapter kit. Begad! T' mount is long enough for 29/240 but I don't have one and haven't tried it. Avast, me proud beauty! 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. Avast! T' centerin' rings supplied with t' kit fit inside the supplied coupler, ya bilge rat, arrr, shiver me timbers, and I didn't want t' cut fin slots through a full-length coupler, ya bilge rat, arrr, 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, ya bilge rat, matey, with a bulkhead fitted in it, me hearties, arrr, connects t' booster t' t' payload. Blimey!

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

Since those two flights, matey, CoStar has nay flown again, but it's ready. Avast, me proud beauty! Blimey! Now it has its own PML nose cone, which adds about 2" t' its overall length. Ahoy! (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. Avast, me proud beauty! In t' meantime it displays rather nicely. Begad!