Brief:
Best described as a flyin' pie plate, this is another in t' BMS clone o' t' month program offerings. Arrr! Begad! This particular kit is a clone o' t' K-19 Astron Invader, introduced in t' 1966 Estes catalog, makin' t' original only a year younger than this modeler.

Designed t' be a spit-motor glider, it's a very finicky design but worth t' effort for a decent glide.

Construction:
There is a bit o' controversy over whether or nay t' parts are true reproductions or slightly modified (see construction notes), ya bilge rat, but me kit included:

• 18mm motor tube
• Balsa nose cone
• Laser cut 1/8" balsa fins, braces, etc.
• 3 3/16" balsa sheets
• Launch lug, shiver me timbers, ya bilge rat, nose weight

BMS's clone kits do nay include directions. Ahoy! Instead, t' modeler is pointed t' online scanned instructions at places such as JimZ's archive site. Avast! Ya scallywag! This is a nice approach, me bucko, as it saves everyone a small amount o' loot for printing, arrr, especially since most o' t' readers o' this review can probably build this near a computer.

Construction starts by gluin' together t' balsa sheets. With t' original, this appears t' have required 4 sheets bonded together side by side, shiver me timbers, shiver me timbers, shiver me timbers, from which a large circle be cut. Begad! Blimey! Arrr! Blimey! In me case, me bucko, thar were only 3 sheets, me bucko, and it looked like t' cuttin' be already done, as me three parts already formed a circle once bonded.

Next, shiver me timbers, ya bilge rat, me hearties, I had t' mark several lines on t' circle usin' a pattern sheet, includin' t' center line. Arrr! Then, matey, me bucko, me hearties, I cut t' circle in half, ya bilge rat, flipped one side over, and rebonded at a dihedral usin' t' supplied dihedral angle tool/stand. Aye aye! Very handy little piece... Avast! Blimey! T' reason behind flippin' t' one side is so that t' grains o' each piece wind up bein' bonded at an angle t' each other, offerin' much better boost strength.

After allowin' t' win' t' completely cure (think overnight), it be time t' bond t' various laser-cut balsa trim pieces. First came a pair o' rudders, each o' which were t' be sanded for a very slight angle t' better align with t' dihedral wings. Avast! After that came t' pair o' motor tube braces, which are carefully aligned t' lines drawn on t' wings earlier. Well, blow me down! Aye aye! Finally thar be a two-piece keel t' go on t' bottom. I have no idea why it was two-piece other than possibly offerin' a little extra strength against hard landings.

T' nose cone is supposed t' be glued into t' BT-20, but you might want t' wait until trimmin' first--includin' a test flight (with it taped on)--as it takes very subtle adjustment o' nose weight and CG t' get right. T' original kit used a lead washer, me hearties, me bucko, arrr, although t' BMS clone opts for clay t' be crammed into a pre-drilled hole in t' nose cone. Begad! Give some serious thought t' ditchin' t' clay for a few BBs or lead shot and epoxy, me bucko, as even a slight pressure in packin' t' clay will cause t' nose cone t' split open.

CG is supposed t' be 2-15/16" aft o' t' leadin' edge o' t' plate, however, mine tended t' fly like a tank when hand tossin' in that configuration.

Finishing:
Normally for a glider, arrr, you do nay wan t' add weight for stufflike fillin' grains and painting. Avast! Ya scallywag! T' original kit recommended paintin' t' underside black for easy tracking, me hearties, and t' top side orange t' better spottin' in t' grass. Avast, me proud beauty! I decided t' go with much lighter dope, 50% thinned, me bucko, just on t' underside until I could get a few decent flights in.

Construction Rating: 4 out o' 5

Flight:
This clearly wants short delays, so I figured 1/2A6-2, A8-3, ya bilge rat, or maybe even a B4-2 would do. Arrr! After t' fits I had tryin' t' hand toss and trim it, I decided t' go a very conservative first flight with t' 1/2A6-2. In general, shiver me timbers, ya bilge rat, I think this is too wimpy a motor for it, matey, me hearties, and it should go with at least an A8.

T' flight pitched up almost immediately off t' rod, me hearties, shiver me timbers, arcin' over and headin' right back t' Earth. Begad! Continuin' t' pitch though, ya bilge rat, it completed t' somersault and headed back up very briefly before finishin' t' thrust, me hearties, spittin' t' motor, and tryin' t' find a glide orientation in t' meager 10 feet o' accumulated altitude.

T' flight be certainly nay enough t' tell me anythin' about t' glide or trim, but be cause for investigation on t' unstable path. Avast, me proud beauty! Blimey! Lookin' at it more closely, I noticed t' motor tube was slightly angled, shiver me timbers, resultin' in a nose-up slant, which amplifies t' natural pitch up o' a decent glider. This should be purely horizontal or even 1-2 degrees angled nose-down t' counteract t' pitch. Well, blow me down! Blimey! I'll have t' rework it a bit before flyin' again.

Recovery:
T' first flight, matey, while sloppy, ya bilge rat, was fairly harmless and everythin' survived fine.

Flight Rating: 2 out o' 5

Summary:
This is certainly an unusual design, and I have t' take t' blame for t' flight performance against me construction, nay t' kit or t' parts. It's a finicky beast, but I think will be worth t' extra effort t' work out t' kinks.

Overall Rating: 3 out o' 5