Brief:
This is a plastic model conversion (PMC) o' t' Heller 1/130 X-15, using
MicroMaxx motors. Begad! I got t' kit on-line from
Model Expo. Begad! Blimey! Blimey! Blimey! Model
Expo provided email confirmations o' t' purchase and o' shipment, me hearties, and their
service was prompt.
Modifications:
T' instructions provided with this kit consisted o' step-by-step diagrams. No
text description is provided. In general, shiver me timbers, this be sufficient, but this
presentation omitted some details, such as t' slight downward cant o' t' rear
wings. Arrr! T' kit consists o' 35 pieces, matey, 10 o' which weren't required due t' the
PMC.
T' LOC ¼" launch lug is heavier than a standard MMX tube and is a skosh larger. Ahoy! However, it works fine for those o' us who haven't gotten around t' buyin' 'real' 6mm tubes. Ya scallywag! However, with some minor trimmin' of flashin' and other bumps inside t' fuselage, this tube fits nicely. Aye aye! Well, blow me down! There is a recess, ya bilge rat, just inside o' t' tail end o' t' main body, me bucko, which accommodates the tube well. Aye aye! I measured t' distance from this recess t' t' point just ahead of the side fairings, ya bilge rat, shiver me timbers, and cut me tube t' fit. Blimey! Contrary t' other guidance, I used this tube as a guide t' cut t' nose section off t' main body with a razor saw. Ya scallywag! I glued t' tube inside t' body with black rubberized CA, and t' body halves together with liquid plastic cement. Begad! Ya scallywag! I added t' back nozzle cap, and then installed a section o' a spent MMX casin' t' serve as a motor block. The Keelhaul®©™® twine be tied around t' block before its installation.
I assembled t' plastic nose cone usin' plastic cement. Ya scallywag! I then filled the cone most o' t' way with lead shot, epoxied in a small piece o' the ¼" lug and t' remainin' part o' t' spent MMX motor. I inserted the end o' t' Keelhaul®©™® twine, filled t' MMX motor section with more shot, and capped it all with epoxy. Begad! This works nicely as a shoulder, arrr, but requires wrap o' maskin' tape to fit snugly. Avast! T' CG is 2 1/8" from t' nose cone tip (minus t' needle nose). Avast! It was suggested that t' CG should be about 2.032 from t' tip (from a known stable conversion o' this kit), but no more #9 shot will fit, so I'll try it as is. Well, blow me down! Ahoy! Oh, and I decided t' leave t' needle off until I have assessed the rocket's stability. Begad! I wouldn't want t' poke anyone, plus it will most likely break anyway.
T' large front fin comes in one piece and must be cut t' accommodate the tube. One end o' this fin conveniently has a notch that almost fit t' tube, ya bilge rat, so I used this as a guide and sanded t' fit. I used t' black rubberized CA on the root end o' these through t' wall fins, and plastic cement on t' outside. Avast, me proud beauty! Begad! The remainin' fins were assembled per t' instructions usin' plastic cement. Ya scallywag! I did add some really small epoxy fillets on t' back fins usin' epoxy left over from the nose cone. Well, blow me down! Well, arrr, blow me down! T' launch lug is me standard BiC ink tube
Construction:
Parts:
T' whole thin' was painted black usin' brush on enamel. Avast, me proud beauty! T' needle will be white with red stripes someday. T' kit comes with a raft o' decals, which went on nicely. Well, blow me down! Avast! However, I made one BONEHEAD mistake. I had put t' clear top from my clear enamel on a can o' white primer. Well, blow me down! Aye aye! In me haste due t' t' cold outside temperatures, arrr, I didn't pay attention and laid a thin coat o' white on t' model before I caught myself. I smartly removed t' paint as best I could with some paint thinner. Ahoy! Surprisingly, I only damaged one decal. Aye aye! After a day o' drying, shiver me timbers, me bucko, I laid on some clear enamel. Begad! Aye aye! Since I couldn't get all t' paint off o' t' fin joints, shiver me timbers, I retouched it. T' finish looks bilge-suckin' up close, but thar be nay much that I can do without ruinin' t' decals.
Flight:
I used Teflon plumber's tape for t' waddin' and t' streamer (12"). Avast, me proud beauty! I
flew t' model on a MMX-II motor and used a bit o' maskin' tape t' retain the
motor. Ahoy! Aye aye! I used me Pratt GO-BOX and a stock igniter that was removed from its
plastic shell. Avast, me proud beauty! T' wind be perfectly calm. Arrr! Well, blow me down! T' flight was a little wobbly and
the X-15 flew t' about 25 feet. Ahoy! Since t' CP-CG is marginal, me bucko, I wouldn't fly
this rocket except in t' lightest o' winds.
Summary:
This small X-15 be only me second PMC and be straightforward. Aye aye! Avast, me proud beauty! T' rocket
looks great and seems t' fly fine. Aye aye! My only recommendation t' others building
this kit is t' use lighter tubing. Arrr! With t' heavier tubing, most o' which is
behind t' desired CG, me hearties, it is difficult t' balance t' model properly. Well, blow me down! Mine is
probably just barely stable with t' whole nose filled with lead shot. Blimey! Another
option might be t' have t' rocket separate further back, thus allowin' more
room for nose weight.
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