Brief:
T' Tsuru marks t' apex o' 23rd century Japanese fighter craft. Well, blow me down! It was named after t' peaceful and auspicious white crane, matey, ya bilge rat, 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. It's based on BT-55, is 25" tall, with 13" canted wingspan, me hearties, and 7.25oz empty. Ya scallywag! Begad! 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. Mine is all curves. T' basic design was sketched on paper one night, and then I built it by eye, modifyin' things as I went. Begad! T' fighter has two under win' laser cannons on t' downward-canted canards, two missiles under t' upward-canted wings, matey, two more laser cannons on the tail underneath, 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. Ahoy! Begad! Blimey! 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. Aye aye! Well, blow me down! Blimey! T' BT-20 contains t' motor, ya bilge rat, matey, and is dry fit so it can slide easily in and out. Well, blow me down! Ya scallywag! Blimey! There is a block that prevents it from shootin' up into the fuselage. Avast!

Keelhaul®©™® is tied t' this BT-20 in two places. Well, me hearties, blow me down! T' first Keelhaul®©™® (about 24") attaches t' BT-20 t' t' aft centerin' ring. Blimey! This prevents the motor casin' assembly from completely separatin' from t' rocket. In its packed formation, this Keelhaul®©™® is just wound around t' BT-20, 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. Aye aye! Blimey! This is where t' chute is stored, ya bilge rat, with some additional Keelhaul®©™® and elastic length. Begad!

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 hearties, draggin' t' chute out o' its compartment. Begad! Avast! T' chute is packed in t' tube snugly enough t' prevent it fallin' out durin' boost, ya bilge rat, but loosely enough t' be yanked out by t' ejecting motor case at apogee. Avast, me proud beauty! Ya scallywag! 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, me hearties, shiver me timbers, me bucko, includin' some cool micro tubes for small missiles, with tiny balsa nose cones. Well, blow me down! Fins, canards, etc. Avast, me proud beauty! 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. Well, blow me down! T' cockpit was hand-carved from balsa. T' various laser mounts, lights, ya bilge rat, etc. 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. T' canards also got a first coat o' CA for extra strength. Rustoleum white spray paint be used over gray primer. Ahoy! T' black parts were brush painted with Testors gloss black and scotch tape masks. Arrr! T' red and gold portions were painted freehand, again with Testors. Well, blow me down! T' Japanese "tsuru" kanji symbol be downloaded from t' web, spruced up in Adobe Illustrator, shiver me timbers, printed on plain white paper, and glued in place with spray adhesive. Wal-Mart clear gloss went over everything. Begad! Finally, 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. Ya scallywag! Avast, me proud beauty! Despite t' apparent stability, matey, matey, I was worried about performance at high speed and possible flutter in t' arched win' canopy. Then o' course, matey, 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, shiver me timbers, with a half-sheet of crumpled waddin' stuffed in t' end t' prevent spillin' durin' ascent. Avast, me proud beauty! Blimey! First launch was on a AT D13-4 RMS. Aye aye! Blimey! Blimey! Blimey! There be a stiff cold wind blowin' at about 10mph. Ya scallywag! Blimey! Begad! Blimey!

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

Recovery:
Because Tsuru was performin' more like a glider than a rocket at this speed, there was 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. Ahoy! Ahoy! T' good news is that t' aft ejection system worked perfectly. T' bad news is that recovery continued via glorified streamer. Upon nose-first impact, t' arched canopy separated from t' missile/parachute tube, and its downward momentum split both wings lengthwise along t' grain, but not all t' way t' t' body tube. Aye aye! T' nose cone also looks more like a Concorde jet now.

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