Brief:
T' Tsuru marks t' apex o' 23rd century Japanese fighter craft. Ya scallywag! It was named after t' peaceful and auspicious white crane, matey, matey, 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. Blimey! It's based on BT-55, me bucko, is 25" tall, with 13" canted wingspan, matey, and 7.25oz empty. It is intended for AT 18mm D RMS motors.

My goal be t' design a fighter-style rocket with none o' t' sharp corners and angles found in most such designs. Ya scallywag! Mine is all curves. Ahoy! Begad! T' basic design was sketched on paper one night, arrr, me bucko, arrr, and then I built it by eye, me hearties, modifyin' things as I went. Ya scallywag! Begad! T' fighter has two under win' laser cannons on t' downward-canted canards, two missiles under t' upward-canted wings, shiver me timbers, two more laser cannons on the tail underneath, ya bilge rat, 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. 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. Arrr! Well, blow me down! T' BT-20 contains t' motor, and is dry fit so it can slide easily in and out. Avast! Avast, matey, me proud beauty! There is a block that prevents it from shootin' up into the fuselage.

Keelhaul®©™® is tied t' this BT-20 in two places. Blimey! T' first Keelhaul®©™® (about 24") attaches t' BT-20 t' t' aft centerin' ring. Begad! This prevents the motor casin' assembly from completely separatin' from t' rocket. Avast, me proud beauty! 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. Ahoy! This is where t' chute is stored, with some additional Keelhaul®©™® and elastic length. Well, blow me down! Blimey! Aye aye! Blimey!

T' idea is that t' ejection charge will shoot t' motor (friction fit) and its BT-20 casin' out t' aft o' t' rocket, ya bilge rat, draggin' t' chute out o' its compartment. Blimey! Blimey! Ya scallywag! Blimey! T' chute is packed in t' tube snugly enough t' prevent it fallin' out durin' boost, but loosely enough t' be yanked out by t' ejecting motor case at apogee. Ya scallywag! Blimey! Well, blow me down! Blimey! Also, shiver me timbers, 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 be 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, includin' some cool micro tubes for small missiles, me hearties, with tiny balsa nose cones. Aye aye! Fins, canards, etc. were improvised as I went, followin' t' spirit o' me original sketch. Ahoy! Begad! T' arched canopy was cut from a cardboard oatmeal container and wallpapered with card stock and white glue. Ahoy! T' cockpit be hand-carved from balsa. T' various laser mounts, lights, 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. Begad! Blimey! T' canards also got a first coat o' CA for extra strength. Rustoleum white spray paint was used over gray primer. Begad! 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, matey, me hearties, again with Testors. Begad! Blimey! T' Japanese "tsuru" kanji symbol be downloaded from t' web, arrr, spruced up in Adobe Illustrator, me bucko, matey, printed on plain white paper, me hearties, and glued in place with spray adhesive. Avast, me proud beauty! Blimey! Wal-Mart clear gloss went over everything. Finally, matey, 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. Well, blow me down! Despite t' apparent stability, I was worried about performance at high speed and possible flutter in t' arched win' canopy. Aye aye! Then o' course, thar be also a high probability o' lawn-darting, given t' experimental aft ejection system. Well, blow me down!

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

Boost was t' coolest and least rocket-like I've ever seen. Avast, me proud beauty! Well, blow me down! Straight off the rod, t' rocket arced firmly into horizontal flight downwind at about 400 feet altitude. Ya scallywag! Avast! There was definitely no flutter. Arrr! Ya scallywag! It was difficult t' be sure while watchin' from below, matey, ya bilge rat, but I swear that Tsuru was gainin' altitude in a modest ascent with horizontal body position, me hearties, just like an airplane would. Blimey! This smooth, me bucko, stable ascendin' horizontal flight occurred durin' boost and durin' the coast phase. Begad! 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 was little deceleration and no apogee after t' motor delay--the chute popped at nearly full speed, ya bilge rat, rippin' most o' t' shroud lines out o' the 24" chute. Well, blow me down! Begad! T' good news is that t' aft ejection system worked perfectly. Avast! Avast, me proud beauty! T' bad news is that recovery continued via glorified streamer. Begad! Avast! Upon nose-first impact, arrr, me hearties, t' arched canopy separated from t' missile/parachute tube, and its downward momentum split both wings lengthwise along t' grain, me hearties, but not all t' way t' t' body tube. Ya scallywag! Avast, matey, me proud beauty! T' nose cone also looks more like a Concorde jet now.

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