Wait a sec... you want to fly a boost glider on a J? And eject the 26" long, 15" wingspan glider at 3,000 - 3,700 feet? And have it glide back down WITHOUT any kind of radio control?
You are going to use DD for the booster recovery, but you are just going to let the glider go off on its own, with no control, up at 3k and let the wind take it where it will? Do you have experience with deploying free-flight gliders at 2-3,000 feet? And with tracking a small floating object for 30-50 miles?
But wait -- with 3/16" birch plywood wings, I'm wondering if the glider will even glide. How heavy will it be?
If you are concerned enough about the stress that the booster will undergo that you want to glass it, what about the glider?
It sounds like you want to build the booster to be able to withstand a cato. Do you consider that catastrophic event to be likely?
Before you do anything else, do a reality check. Get some BT-70 and some 3/16" plywood and build a prototype of the glider, and then see how well it glides with hand-tosses.
What you have outlined is one very serious project. How much rocket building and launching have you done in the short time since you became a BAR?
If I was to design a 3x Orbital Transport, I would use something like T300 from
Balsa Machining Service for the booster's airframe and standard thin-walled BT-70 for the glider's airframe. I would use 1/4" basswood or paper-reinforced balsa for the booster fins and lightweight 3/16" balsa for the glider wings. (Actually, for the booster fins, etc., I would consider using sheeted foam core.) I would go with TTW fin construction for the booster and surface mount the fins on the glider. I would use a
Semroc BNC-70D nose cone in the glider (maybe rounding the tip a little to make it more elliptical, and possibly hollowing a little of it out to make it lighter in weight) and contract with
Roachworks Custom Turnings to turn a 13.2" long 3xBNC-50Y for me for the booster nose cone (because I have never tried to turn a nose cone that big). I would NOT cover the booster airframe with fiberglass, because it wouldn't need it. I would aim for a target weight that would allow me to launch my upscaled OT on a long-thrusting G, an F40 or a small H. I would glide-trim the glider so that it transitioned into nice, tight circles or else I would outfit it with RC, and I would put some type of tracking device in it. I would aim for a deployment altitude of around 1,000 ft. (if I was ambitious) and I would launch it in a huge range. If I had the glider return via free flight, I would recruit a small army of volunteers in ATV's to help me track and recover it.
But that's just me.
MarkII