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, me hearties, arrr, and fin stock. Aye aye! Begad! T' four body tubes were t' brown Estes type, but t' three nose cones were rather thin plastic, which made for rather weak points t' screw in a screw eye (the kit now comes with balsa cones). Aye aye! A Rockethead Rockets 15" mylar chute, and two mylar streamers were also included. Begad! T' recovery items were very high quality. A DMB Rocketry three motor Clip Whip had been thrown in as well. Basswood fin stock and fiber centerin' rings round t' kit off nicely.

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

Rockethead Rockets Gamma III Optimized

Finishing:
There are no special finishin' requirements nor decals included with t' kit. Arrr! 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. 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 be at BigEARS '05 in Cambridge, matey, England. I loaded it up with a D12-5 and C6-3s in t' boosters. Well, blow me down! Waddin' was inserted into the boosters and sustainer. 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, shiver me timbers, and went out t' t' pads. T' wind was gustin' around 7-10mph, me hearties, arrr, and I was a bit nervous about launchin' but I went for it anyway. Ya scallywag! After a quick countdown, t' rocket left t' pad with all three motors burnin' then shot over towards t' campin' area, me hearties, goin' close t' horizontal. 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! 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), arrr, we managed t' find one booster and t' nose cone from t' other, which had separated and taken t' streamer with it. Begad! The sustainer was found a little further down, me hearties, with t' nosecone about 4" into the hard mud. Begad! T' top o' t' body tube was crimped beyond repair and t' motor mount had moved a couple o' inches into t' body. It seemed t' crash had been caused by a short launch rod, arrr, me hearties, me hearties, t' wind, me bucko, arrr, and late ignition o' one o' the boosters, which be 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, me hearties, matey, it was ready for another flight, which took place at UKRA '05. Blimey! Aye aye! It was loaded up again with a couple o' C6-3's and a D12-5. Ahoy! This time, I used Quickmatch (fast burnin' fuse ignited by an Estes igniter) t' light t' motors, which practically guaranteed simultaneous ignition o' all t' motors. Well, blow me down! Arrr! After worryin' about flyin' it in t' high wind (higher than BigEARS), I loaded it up onto a pad with a long rod. Ahoy! Aye aye! All three motors lit at t' same time thanks t' t' Quickmatch and t' Gamma shot off the pad, shiver me timbers, barely weathercocking. Right on cue, t' boosters ejected and separated from t' sustainer. Begad! One booster kicked its motor, which was me fault for not securin' it properly, and both nose cones separated from t' tubes. The sustainer continued skyward for 3-4 more seconds, 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, with very excitin' flights. Ahoy! Blimey! Well, blow me down! Blimey! I be 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

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