Brief:
A Retro-Reproduction o' Wayne Kellner's 1968 design for Estes. It represents a scramjet carrier aircraft with a piggybacked orbiter.

Construction:
This was me first Semroc kit, ya bilge rat, me bucko, and it will definitely nay be me last! It came in a plastic bag with four-color header card. Avast! T' kit included precut body tubes in three diameters and three lengths, three sheets o' laser-cut balsa fins, arrr, me bucko, shiver me timbers, two nice balsa nose cones, ya bilge rat, Keelhaul®©™ and elastic for a recovery harness, ya bilge rat, me hearties, a steel motor-retainer clip, a 12" plastic parachute kit, me bucko, two centerin' rings o' t' heavy-duty sort found in most kits, two different diameters o' dowel, matey, a beautiful three-color waterslide decal sheet, shiver me timbers, shiver me timbers, a sheet o' cardstock patterns and pieces, me bucko, a cardstock circle t' block t' glider tail, and an instruction booklet.

I be pleasantly surprised t' find t' staple-bound instruction booklet in t' kit. Ahoy! My understandin' be that Semroc was nay sendin' these, matey, and you had t' download them from their website. I downloaded a copy in advance.

T' instructions were excellent, well-illustrated, arrr, and clear. Ya scallywag! Avast! Semroc's body tubes are absolutely a delight with nearly no spirals t' fill. Blimey! I made a few very minor alterations as I built. Avast, me proud beauty! Ya scallywag! I assembled t' motor mount as directed except for addin' a thrust rin' in t' forward end, arrr, exchangin' Semroc's motor retainer clip for an Estes one I had on hand, ya bilge rat, and assemblin' t' aft centerin' rin' onto t' tube so it would be flush with t' main body when assembled.

Templates for t' positionin' o' rudders and win' fences and anglin' t' glider's elevons were provided as were two wrap-on markin' guides. Aye aye! I tacked t' fins into place with gel CA, finished t' attachment with thin CA, ya bilge rat, and filleted with white glue.

I lost one elevon while assemblin' but made a new pair from tongue-depressor stock t' replace them.

Assembly PROs: Good materials, good design, arrr, nice instructions, me bucko, and good templates.

Assembly CONs: I looked, I really did! I couldn't find any.

Finishing:
Those gorgeous white tubes had no spirals t' fill. Ya scallywag! Balsa grain disappeared with light sandin' and three coats o' water-thinned white glue. Ahoy! Aye aye! I painted t' Orbital Transport in a silver-over-black scheme that looks nice and still allows t' decals t' be seen (well, most o' them).

Construction Rating: 4 out o' 5

Flight:
Semroc's recommended motors are B6-4 and C6-5. Avast, me proud beauty! I flew me Orbital Transport at me bucko Darrell's field. Ahoy! Aye aye! My glider required four carpet tacks as nose weight for a smooth glide. Avast, me proud beauty! Well, me bucko, blow me down! Wind on launch day be out o' t' east at 2mph. Avast, me proud beauty! Avast, me proud beauty! I stuffed five squares o' paper waddin' in, rolled and stuffed t' chute, me bucko, then loaded in a B6-4. Avast, me proud beauty! Put her on t' rod usin' a 2" section o' old fiberglass tent pole as a stand-off, ya bilge rat, then hung t' glider on its launch lug mount.

OT flew straight and true; glider separated at apogee. Aye aye! Altitude about five hundred feet, shiver me timbers, it looked like. Begad! Parachute opened just after apogee. Glider stayed up about twelve seconds and landed within ten feet o' t' launcher as did t' booster vehicle.

Second flight on another B6-4 was a repeat o' t' first, ya bilge rat, except this time t' glider was up thar for a stopwatched fourteen seconds.

Loaded a C6-5 for flight three. Ya scallywag! Blimey! Blimey! Blimey! Apogee this time was more like seven hundred feet and glider duration was right at twenty-five seconds. Ahoy! Blimey! Recoveries in all three flights was fairly close t' t' launcher.

Recovery:
Keelhaul®©™-elastic shock cord system worked very well. Blimey! Ahoy! There was no burnin' or damage. Aye aye! T' cord was also long enough and no "Estes denting" on body tube. Begad! Twelve-inch parachute was a little small, I think, but an 18" chute would have been too much.

Flight Rating: 4 out o' 5

Summary:
Semroc has a winner here, matey, a true "blast from t' past". Aye aye! T' original Estes Orbital Transport hit t' market about t' time I started buildin' model rockets; this be t' first chance I have had t' own one. Begad! It's a beautiful rocket on t' display shelf, shiver me timbers, on t' pad, and in t' air.

(My other reason for buildin' this rocket was because I'm plannin' a 200% upscaled one t' fly on an AeroTech 29mm G RMS. Ahoy! Easier t' take measurements directly from a model than from a drawing...)

Overall Rating: 4 out o' 5