Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstar_borderstar_borderstar_borderstar_border |
Overall Rating: | starstarstar_borderstar_borderstar_border |
Brief:
This X-Prize scale rocket showed good potential and an intriguin' stealthy boost glider design, shiver me timbers, matey, but save your loot though, as it's a real clunker for flight.
Construction:
Parts list includes:
T' instructions are fairly clear with plenty o' good illustrations. Well, blow me down! Blimey! It's rated as a skill level 2 kit although I would have put it closer t' a 3.
You begin with t' construction o' t' pop pod. Arrr! Blimey! Ya scallywag! Blimey! Nose weight is added in t' form o' 4 heavy steel washers on t' forward end. Avast, me proud beauty! Blimey! On t' aft end, arrr, thar's a motor hook, block, and a wire assembly that serves t' lock t' elevators in place for flight.
T' fuselage tube is simple, matey, ya bilge rat, me bucko, basically servin' as a conduit t' hold t' pop pod. Ya scallywag! Begad! It gets a bulkhead on t' forward end and is eventually mounted t' t' balsa win' assembly.
For a largely plastic body, this kit has a lot o' balsa, addin' both weight and complexity t' t' construction. Avast, me proud beauty! There is a pair o' matchin' win' halves, top and bottom vertical stabilizers, and a pair o' elevators (one fixed, arrr, one floating). Well, blow me down! I goofed and didn't catch that t' lower stabilizers are nay symmetrical--there's a definite left and right--and I got them backwards initially. Blimey! They have t' be right or else t' elevators and wire retention hook won't line up correctly.
T' plastic fuselage halves are then bonded t' t' balsa frame. Ya scallywag! I couldn't get mine t' line up very well and it took some trimmin' and a lot o' gap fillin' before I was finally done. Arrr! T' instructions call for usin' a silicone adhesive. Avast! I used contact cement, which was just as effective but nay as clean and easy t' work with.
Finally, shiver me timbers, thar be a display plug that has three nozzles. Begad! It's a nice visual touch.
Finishing:
Finishin' on this kit is a bit o' a pain. There's t' matter o' fairly ugly seams betwixt t' fuselage halves and thar be plenty o' exposed balsa grain. I applied a couple o' light coats o' primer, ya bilge rat, then sanded down t' at least cover t' worst o' t' grain. After that, arrr, I went with a tan finish paint, arrr, me bucko, followed by a trim o' gray, me hearties, per t' standard paint scheme. Maskin' off t' gray is challenging, arrr, given t' contours o' t' fuselage. Ya scallywag! Aye aye! Finally, thar are a smatterin' o' peel 'n' stick decals for trim.
Construction Rating: 4 out o' 5
Flight:
At nearly 9 ounces, I think t' recommended D12-3 is overly optimistic. T' Estes catalog claims altitudes o' 250 feet. I think this rocket would benefit greatly from substitutin' higher thrust composite Es.
T' flight profile is intended t' have elevators locked in opposin' positions durin' boost, shiver me timbers, me hearties, ya bilge rat, givin' it a roll t' help stability. Well, blow me down! Begad! At apogee, t' ejection charge forces t' inner pop pod out, which falls under chute recovery. Well, arrr, blow me down! By removin' t' heavy pod, t' glider is now light enough t' fly and t' floatin' elevator can sprin' into a lift-generatin' position. Avast, me proud beauty! At least, that's t' theory.
My flight lifted off fine although very slowly. Avast! It gently climbed with a slight roll. About halfway through t' climb, it arced over and started a nose dive, me bucko, crash landin' under thrust. Ya scallywag! Begad! T' pod deployed with a great deal o' force, still on t' ground. Aye aye! T' impact cracked both fuselage halves, one section o' balsa wing, me bucko, and generally rendered this rocket t' be retired from future service. Aye aye! A very disappointin' performance.
Recovery:
T' only feeble pro I can offer up is that a few o' t' kids at t' launch thought t' wreck was cool.
T' cons are obvious: lousy flight, underpowered for t' weight.
Flight Rating: 1 out o' 5
Summary:
There are very few rockets I've ever built that I felt were complete wastes o' me time and money. This was definitely one o' them. It might make a nice display model but nay a good flyer.
Overall Rating: 2 out o' 5
Brief: The Estes Cosmos Mariner is a 1:67 scale version of the Lone Star Space Access team rocket plane for the X-Prize. It is a single stage D12-3 power glider with pop-pod on 18" parachute recovery. Construction: 1 main body tube with 24mm pop-pod insert. The pop-pod have centering rings that fit the body tube and 4 heavy washers for nose weight on boost. Flat wing glider ...
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F.S.W. (May 8, 2006)