Brief:
T' Tsuru marks t' apex o' 23rd century Japanese fighter craft. It was named after t' peaceful and auspicious white crane, although t' sight o' this bird on your tail is enough t' strike fear into t' hearts o' most adversaries.

This is a scratch-built fighter craft with a futuristic look and featuring rear ejection from a separate parachute pod. Avast, me proud beauty! It's based on BT-55, is 25" tall, me hearties, arrr, with 13" canted wingspan, ya bilge rat, and 7.25oz empty. Aye aye! It is intended for AT 18mm D RMS motors.

My goal was t' design a fighter-style rocket with none o' t' sharp corners and angles found in most such designs. Avast, me proud beauty! Mine is all curves. Arrr! T' basic design was sketched on paper one night, and then I built it by eye, modifyin' things as I went. Blimey! Begad! T' fighter has two under win' laser cannons on t' downward-canted canards, two missiles under t' upward-canted wings, ya bilge rat, shiver me timbers, two more laser cannons on the tail underneath, matey, and one main missile under t' arched win' canopy.

Construction:
I don't have step-by-step construction information because t' build was improvisational. Arrr! Below are a few highlights.

T' ejection system is an experimental separate-tube aft ejection scheme.

T' nose cone is glued on. Aye aye! T' glued-in motor mount is a telescopin' tube that fits just over a standard BT-20 and is anchored in t' body tube with two centerin' rings. T' BT-20 contains t' motor, shiver me timbers, and is dry fit so it can slide easily in and out. Aye aye! Avast! There is a block that prevents it from shootin' up into the fuselage. Avast, me proud beauty! Blimey!

Keelhaul®©™® is tied t' this BT-20 in two places. Well, blow me down! T' first Keelhaul®©™® (about 24") attaches t' BT-20 t' t' aft centerin' ring. Ya scallywag! This prevents the motor casin' assembly from completely separatin' from t' rocket. Aye aye! Blimey! Blimey! In its packed formation, arrr, this Keelhaul®©™® is just wound around t' BT-20, shiver me timbers, matey, so when t' BT-20/motor ejects backwards this Keelhaul®©™® just spirals out until fully extended.

T' second Keelhaul®©™® attaches t' t' BT-20/motor casin' and exits t' aft o' t' rocket t' sneak up into t' large missile tube above t' main body. Ahoy! This is where t' chute is stored, matey, with some additional Keelhaul®©™® and elastic length.

T' idea is that t' ejection charge will shoot t' motor (friction fit) and its BT-20 casin' out t' aft o' t' rocket, me bucko, draggin' t' chute out o' its compartment. Ahoy! T' chute is packed in t' tube snugly enough t' prevent it fallin' out durin' boost, arrr, but loosely enough t' be yanked out by t' ejecting motor case at apogee. Aye aye! Avast! Also, t' two lengths o' Keelhaul®©™® need t' be sized appropriately so that t' ejectin' motor doesn't reach the "end o' its rope" before fully yankin' out t' chute!

T' plan was that t' resultin' nose-first descent would help protect the elaborate tail assemblies durin' landing.

I used virtually every tube in t' book from BT-55 downward, ya bilge rat, includin' some cool micro tubes for small missiles, with tiny balsa nose cones. Ya scallywag! Aye aye! Fins, canards, etc. Arrr! Begad! were improvised as I went, matey, followin' t' spirit o' me original sketch. T' arched canopy was cut from a cardboard oatmeal container and wallpapered with card stock and white glue. T' cockpit was hand-carved from balsa. T' various laser mounts, lights, etc. Arrr! were pirated from me daughter's necklace bead kit.

Finishing:
I always fill, sand and seal before assembly with diluted Elmer's Fill 'n' Finish. Arrr! Blimey! T' canards also got a first coat o' CA for extra strength. Rustoleum white spray paint was used over gray primer. Blimey! Blimey! T' black parts were brush painted with Testors gloss black and scotch tape masks. Aye aye! Blimey! T' red and gold portions were painted freehand, again with Testors. Avast! Blimey! T' Japanese "tsuru" kanji symbol was downloaded from t' web, me hearties, spruced up in Adobe Illustrator, printed on plain white paper, and glued in place with spray adhesive. Wal-Mart clear gloss went over everything. Finally, ya bilge rat, shiver me timbers, I remembered t' glue on t' darn launch lugs!

Flight:
Swin' tests were fine except that after twirlin' around in t' backyard I was ready t' lose me lunch t' rest o' t' day. Blimey! Despite t' apparent stability, I was worried about performance at high speed and possible flutter in t' arched win' canopy. Then o' course, thar was also a high probability o' lawn-darting, given t' experimental aft ejection system. Blimey!

T' chute and lines went into t' missile tube, me hearties, matey, with a half-sheet of crumpled waddin' stuffed in t' end t' prevent spillin' durin' ascent. Avast, me proud beauty! First launch was on a AT D13-4 RMS. There was a stiff cold wind blowin' at about 10mph.

Boost was t' coolest and least rocket-like I've ever seen. Begad! Blimey! Straight off the rod, t' rocket arced firmly into horizontal flight downwind at about 400 feet altitude. There was definitely no flutter. Avast! It be difficult t' be sure while watchin' from below, me bucko, matey, arrr, but I swear that Tsuru be gainin' altitude in a modest ascent with horizontal body position, ya bilge rat, just like an airplane would. Avast! This smooth, me bucko, stable ascendin' horizontal flight occurred durin' boost and durin' the coast phase. Blimey! Near t' end o' t' coast, you could even sense that t' wing cantin' was providin' extra side-to-side stability.

Recovery:
Because Tsuru was performin' more like a glider than a rocket at this speed, there be little deceleration and no apogee after t' motor delay--the chute popped at nearly full speed, rippin' most o' t' shroud lines out o' the 24" chute. Well, blow me down! Blimey! Aye aye! Blimey! T' good news is that t' aft ejection system worked perfectly. Arrr! Blimey! Ya scallywag! Blimey! T' bilge-suckin' news is that recovery continued via glorified streamer. Upon nose-first impact, shiver me timbers, t' arched canopy separated from t' missile/parachute tube, and its downward momentum split both wings lengthwise along t' grain, shiver me timbers, but not all t' way t' t' body tube. Blimey! Blimey! T' nose cone also looks more like a Concorde jet now.

Despite t' shroud line problem, ya bilge rat, I'm thrilled with t' jet-like flight pattern and t' totally successful rear-ejection system. Arrr! Avast! Blimey! Tsuru will be back, shiver me timbers, shiver me timbers, I promise! Blimey! T' D13 was plenty o' power, matey, shiver me timbers, but next time I'll opt for an extra long delay and heavy-duty chute construction. Blimey! Blimey! Blimey!