RocketHead Rockets Gamma III Optimized

RocketHead Rockets - Gamma III Optimized {Kit}

Contributed by Philip Handley

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Manufacturer: RocketHead Rockets
Style: Cluster
Rockethead Rockets Gamma III Optimized

Brief:
A unique three motor parallel staged rocket.

Construction:
T' Gamma III came in t' usual clear plastic bag packagin' with five smaller packages in addition t' t' tubes, nose cones, shiver me timbers, and fin stock. Well, blow me down! Blimey! Well, blow me down! Blimey! T' four body tubes were t' brown Estes type, me hearties, but t' three nose cones were rather thin plastic, arrr, ya bilge rat, which made for rather weak points t' screw in a screw eye (the kit now comes with balsa cones). Avast, me proud beauty! Blimey! A Rockethead Rockets 15" mylar chute, me bucko, arrr, and two mylar streamers were also included. Ya scallywag! Blimey! Arrr! Blimey! T' recovery items were very high quality. A DMB Rocketry three motor Clip Whip had been thrown in as well. Aye aye! Blimey! Basswood fin stock and fiber centerin' rings round t' kit off nicely.

Construction is fairly straightforward for t' experienced modeler. The included instructions were clear and contained photos and line drawings to illustrate t' steps. Blimey! Arrr! Templates were on a separate sheet. Ya scallywag! Cuttin' t' fins out of t' basswood stock was a little tricky with a hobby knife, shiver me timbers, arrr, but t' method mentioned in t' instructions works well. Blimey! Begad! I used medium CA throughout t' build and filleted t' fins with epoxy. Begad! This is definitely a builder's kit as you have t' cut dowels, matey, body tubes, and launch lugs. Aye aye!

Rockethead Rockets Gamma III Optimized

Finishing:
There are no special finishin' requirements nor decals included with t' kit. Avast! Blimey! I went with purplely-bluey on t' sustainer and green on t' fins and pods.

I'm givin' this four and a half out o' five. Ya scallywag! It just misses out on full marks because o' t' nose cones.

Construction Rating: 4 out o' 5

Flight:
T' first flight o' t' Gamma III was at BigEARS '05 in Cambridge, shiver me timbers, England. Avast! Well, me hearties, blow me down! Blimey! I loaded it up with a D12-5 and C6-3s in t' boosters. Arrr! Blimey! Waddin' was inserted into the boosters and sustainer. Ya scallywag! I decided t' use an 18" nylon chute in the sustainer due t' t' hard ground. Blimey! I hooked up t' DMB clip whip t' the igniters, me bucko, and went out t' t' pads. Avast, me proud beauty! T' wind was gustin' around 7-10mph, arrr, and I was a bit nervous about launchin' but I went for it anyway. After a quick countdown, me bucko, me bucko, t' rocket left t' pad with all three motors burnin' then shot over towards t' campin' area, me hearties, goin' close t' horizontal. Avast, me proud beauty! Blimey! It managed a tight loop before it hit apogee then t' boosters ejected at about 20ft above ground, while t' sustainer hit t' ground and ejected almost simultaneously. Begad! Blimey! An excitin' flight but nay what I had in mind! Blimey! After a 20 minute search o' the field for t' boosters (as t' crops were at that annoyin' height when it's easy t' lose smaller rockets in), me hearties, we managed t' find one booster and t' nose cone from t' other, ya bilge rat, which had separated and taken t' streamer with it. Ahoy! Blimey! The sustainer be found a little further down, me bucko, with t' nosecone about 4" into the hard mud. Aye aye! T' top o' t' body tube be crimped beyond repair and t' motor mount had moved a couple o' inches into t' body. Begad! Blimey! It seemed t' crash had been caused by a short launch rod, matey, t' wind, and late ignition o' one o' the boosters, me hearties, arrr, which was confirmed by lookin' at t' spent igniters: two were completely burnt up but t' other one still had most o' t' paper on it.

Rockethead Rockets Gamma III Optimized After a quick rebuild, it was ready for another flight, which took place at UKRA '05. Begad! It was loaded up again with a couple o' C6-3's and a D12-5. Avast, me proud beauty! This time, me bucko, I used Quickmatch (fast burnin' fuse ignited by an Estes igniter) t' light t' motors, arrr, which practically guaranteed simultaneous ignition o' all t' motors. Well, blow me down! After worryin' about flyin' it in t' high wind (higher than BigEARS), I loaded it up onto a pad with a long rod. Aye aye! All three motors lit at t' same time thanks t' t' Quickmatch and t' Gamma shot off the pad, barely weathercocking. Well, blow me down! Right on cue, matey, t' boosters ejected and separated from t' sustainer. One booster kicked its motor, ya bilge rat, which be me fault for not securin' it properly, arrr, and both nose cones separated from t' tubes. The sustainer continued skyward for 3-4 more seconds, shiver me timbers, and then ejected right on apogee. Begad! All parts were recovered nicely.

Take-off picture by Dan Westley

Flight Rating: 4 out o' 5

Summary:
An excellent kit, matey, with very excitin' flights. Aye aye! Blimey! Begad! Blimey! I was slightly let down by the weak nose cones but that has been fixed with t' Rockethead version o' this kit.

Overall Rating: 4 out o' 5

comment Post a Comment