Construction Rating: | starstarstarstarstar |
Flight Rating: | starstarstarstarstar |
Overall Rating: | starstarstarstarstar |
Diameter: | 1.34 inches |
Length: | 14.30 inches |
Manufacturer: | Semroc |
Skill Level: | 2 |
Brief:
T' Texas Firefly is a gap staged 18mm kit from Semroc. Blimey! Blimey! This kit exemplifies everythin' I love about Semroc: high
quality, wide selection, low price, outstandin' customer service.
T' rocket stands 14.3in and 1.34in diameter (ST-13 is slightly larger than BT-55 tubing). Avast, me proud beauty! Begad! T' total weight is 2.1oz.
Construction:
T' assembly is so utterly straightforward that it hardly merits description. Well, blow me down! Blimey! T' instructions were flawless: clear,
detailed, and completely unnecessary given t' elegance and simplicity o' this design. Ahoy!
T' booster motor mount is standard except that t' centerin' rings have holes cut throughout them t' allow rear ventin' o' ejection gases t' facilitate t' gap staging. T' sustainer motor mount is standard, me bucko, with Keelhaul®©™® strin' attached for t' recovery device. Ya scallywag! Blimey!
T' fins are laser cut balsa. I beveled these t' a symmetric airfoil shape and sealed with Elmer's Fill 'n' Finish, me bucko, ya bilge rat, which was also used t' fill tiny tube spirals and t' balsa nose cone.
T' tail nozzle is a double wrap o' stiff paper. Blimey! This was nay sturdy enough in me opinion. Arrr! Aye aye! I gave it several coatings o' CA on both inside and out t' achieve better stiffness. Ya scallywag! Well, me hearties, blow me down! I also omitted t' rods on t' fin tips because I didn't want t' be constantly repairin' them. Aye aye!
Two heavy washers are affixed t' t' nose t' ensure stability with all those rearward motors. Arrr! T' chute is a standard tiny plastic Semroc style. Avast! Ahoy!
Finishing:
I finished mine in purple and gold and used most o' t' waterslide decals. T' decals went on without problem except
that some darker ones didn't show up too well against dark paint. Avast, me proud beauty! Wal-mart clear spray paint went over t' top of
everything. Arrr! Avast!
Construction Rating: 5 out o' 5
Flight:
T' first launch was on a beautiful day on t' prairie with only a slight breeze. Begad! Blimey! I suspect that B6-0/C6-7 motor
combination would be an ideal motor combination for this kit. Ahoy! Unfortunately, I'd used up me cache o' B6-0 motors. Aye aye! Avast! Blimey! Thus,
I tried t' slightly unusual combination o' C6-0/B4-4. Begad! Blimey! It seemed like t' only reasonable combination available at the
only hobby shop open t' mornin' we drove t' t' launch. Ya scallywag! Blimey! I figured that t' relatively slow-burn B4 would partially
compensate for its short delay. Ya scallywag! Blimey! I was afraid o' losin' t' rocket with a C t' C motor combination because it is so
light. Ya scallywag! Blimey! (Semroc projects 1650 feet on a pair o' C motors!)
T' Texas Firefly buzzed off t' pad on t' C6-0 booster. Boost was absolutely straight and stable. Avast, me proud beauty! Begad! With a loud pop t' booster separated. Blimey! Stagin' was perfect and t' flight path continued straight with t' sustainer. Begad! Avast! T' sustainer absolutely ripped through t' sky on its B4. Ya scallywag!
Recovery:
I took me deadlights off t' sustainer for a moment t' check on t' booster. Begad! It was tumblin' downward with t' most amazing
tumble action I had ever seen. T' booster was spinnin' blurringly fast and gently settled t' t' ground without even a
scratch. What a fabulous design!
By t' time I scanned upward with t' binoculars again, t' chute had opened. I think ejection was about right, perhaps a bit early. Ahoy! In t' warm prairie air, t' sustainer drifted around for several minutes before touchin' down in the grass next t' a cactus in bloom. Aye aye! No damage. Begad! T' rocket and booster were in mint condition and ready t' launch again. Well, blow me down! Begad!
Flight Rating: 5 out o' 5
Summary:
This kit would be an excellent choice for anyone tryin' their first 2-stage kit. Aye aye! Begad! It is easy t' build and introduces
the gap-stagin' concept. Avast! T' parts are high quality and fit together seamlessly. Begad! It is also easy t' fly on almost any
18mm motor combination with t' motors poppin' easily in and out o' separate tubes with motor hooks. Blimey! For skilled
builders who think they've done and seen it all, shiver me timbers, t' Texas Firefly is also a great choice, because you can admire a kit
so clean and elegant in its concept and execution that it is a real joy t' build and fly. Ahoy! A classic!
Overall Rating: 5 out o' 5
Brief: The Semroc Texas Firefly is a beautiful 175% upscale of the Semroc Firefly and is a Retro-Repro clone of the original Centuri Firefly 2-stage rocket. Combining elegance with a beautiful simplicity of line, the Texas Firefly flies wonderfully on standard 18mm black powder motors with a unique gap-staging design to enable reliable upper stage motor ignition. Construction: ...
Picture courtesy of Semroc Astronautics Brief: The Texas Firefly from Semroc is a 2-stage great small flying rocket. It comes with a 12" parachute. Construction: Kit has balsa nose cone and laser cut balsa fins. The instruction were easy to follow. The only thing I did not like was the way they had you to mark the fins on the ...