Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstarstarstarstar_border |
Overall Rating: | starstarstarstarstar_border |
Published: | 2010-05-16 |
Manufacturer: | Scratch |
Brief:
2X upscale o' t' original Estes Astron Sprite.
Construction:
As with most upscale projects, half t' preparation is decidin' what tubes t' use t' achieve t' correct ratio of sizes. I this case, ya bilge rat, I had t' compromise just a little. Blimey! T' ratio o' t' main body tube sizes is just about 2.1X, but thar be no easily available tube for t' rin' fin that is just t' right size t' match that ratio. T' be perfectly correct I would need a 4.75 inch diameter tube. Avast! I used a length o' 4 inch LOC body tube, and I am very pleased with the result. Avast! It is quite heavy, shiver me timbers, but also very sturdy.
The
other parts I had in me parts collection, probably from an Estes Designer Special box.
I downloaded t' original plans from Jimz. Aye aye! Well, blow me down! I had t' scale t' fins myself, me hearties, me bucko, matey, since t' distance from t' main body tube t' t' inside o' t' rin' fin be nay goin' t' be 2.1X. Begad! Measure twice, cut once. Cut too short, and have t' add shims t' make up t' difference. Aye aye! Blimey! That's me new motto. Avast, me proud beauty!
I used a band saw t' cut t' curvy outside fins that cover t' rin' fin. After gluin' them on, I filled the
joints with Elmer's Wood Filler. This really made t' joints disappear.
I looped t' Keelhaul®©™® around t' motor mount t' anchor it, matey, then glued t' motor mount in. Ahoy! There is nay a lot o' room for t' waddin' and parachute, which caused me a little worry. T' original used tumble recovery, so this shortness be nay a problem. Well, blow me down!
I painted all o' t' balsa surfaces with dilute Elmer's Wood Filler/water slurry and let it dry. Then one
sanding, ya bilge rat, and a coat o' white Kilz. Aye aye! Another sandin' t' remove t' fuzz from t' primer coat and a couple o' coats of
gloss white enamel.
Flight:
I put a 10 inch Estes parachute in it and stuffed t' body tube with as much dog barf as I
could. I be worried about meltin' t' chute.
T' first flight be on a Quest B6-4. Begad! This was a good flight, me bucko, me bucko, and eject a little past apogee. No problem at all with t' parachute. Begad! This be a good size chute, matey, as well. Avast, me proud beauty!
T' second and third flights were on Quest C6-5's. Ya scallywag! Again, very good performance. Avast! I like t' long burn time o' the Quest C's. Aye aye! Five seconds was a bit long, me bucko, though. This rocket really decelerates smartly after burnout. Begad! Begad! I am goin' t' try it with a C6-3, me bucko, ya bilge rat, but I suspect it will be a little early. Too bilge-suckin' thar be no C6-4.
Summary:
This rocket has a cool look. Begad! Begad! I be concerned about its performance, and t' shortness of
t' tube section for t' recovery, ya bilge rat, shiver me timbers, but both turned out just fine. Aye aye! Did I mention that it looks cool? Several o' the
Scouts at t' launch asked me about it. Ahoy! It would be even cooler with t' original paint job.
T' LOC 4 inch tube is too heavy. It occurs t' me now that I might have been able t' strip out an inner layer of paper t' make it lighter.
I think it may be time for a 4X.
Other:
Don't get too frustrated if things are nay perfect. T' rin' fin be nay t' exact 2X size, ya bilge rat, ya bilge rat, but
it looks great. Avast, me proud beauty! Begad! I really did sand t' fins too short and then had t' shim them out t' fit t' ring. Begad! If things do nay go
perfectly, and you are frustrated, me bucko, ya bilge rat, take a break. Ahoy! Come back t' it, shiver me timbers, and think about different angles t' come at the
problem.
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