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5-6 lbs sounds way low to me given your construction methods. I'd say double that easy.

MaxQ, you need a spar than runs continuously through both wing panels (and fuselage) otherwise your wings are going to be subject to breaking.

https://www.aerobalsa.com/airfoil.php

I'm sure that the Shuttle orbiter is mounted to the ET at or close to it's zero lift angle. (nose down attitude) I'm sure the engineers take into account the fuel that would be wasted using thrust to counteract those moments.

Try a product called 'elo" (easy lift-off), it works great.

In CAD draw a box of known size around your parts, then export as a eps and open in Illustrator. Then using the 'transform' tool in illustrator scale the box to the correct size, then delete the box. What's the file for, laser cutting??

The up-ship site is th eway to go. They have drawings of these vehicles I'm sure.

Year ago I built a 1/100 orbiter and boosted it piggy-backed on a modified Big Bertha. The Bertha had a C6-3 in the usual location but two 13mm A3's mounted on pylons let into two of the fins on the Bertha. I also put a longer nose on it to move the CG fwd. I flew it probably a dozen times and...

Shouldn't this thread be posted in another forum? I think "scale" refers to drawings, documents and build threads of scale models of existing real space and aerospace vehicles.

To all of you worrying about being killed by a Cosmos Mariner, send me your unbuilt kits and I'll relieve you of your hazard.

What new laws are you talking about? The large cost would be $10K for a new (Chinese made) mold for a nosecone. I don't know of any airframe component testing required by any gov't agency for model rockets. NJ has the most draconian laws regarding model rocketry but their certification of model...

Wear a mask and you'll be ok...except for the splinters you may get in your fingertips. The splinters in your fingers hurt but are otherwise harmless. I would definitly invest in a solid carbide router bit that has helix cutting edges instead of straight flutes. You'd probably be OK with doing...

Trim tabs on a pair of the flame fins that counteract the pitch created by the orbiter's elevons sound like a solution to me. Another would be to change the angle of attack of the orbiter on the ET so that during boost it's flying at zero lift.

Ok, that does it, I'm getting an i-phone.

Thanks for that link. I've been using SW2008 for about 6 months now and love it. So glad to dump that autistic POS known as Autocad.

Be a lot easier to skip the verticle planes and diagonal plates. Seems like a lot of labor for little benefit. I'd just do the whole bottom in foam and glass it.

Performance Hobbies (not Performance Rocketry) will soon have a 4" version of the BB.

I'd ditch the crap balsa that I'm sure the kit comes with and use some 4-5 lb/ft2 balsa. Build it light, it'll fly slower, boost higher and more stable, and the lower glide speed will reduce damage on landing. You can't build it like a HPR brick and expect it to boost or glide worth a damn. As...

Autocad 14 probably won't have the pdf converter anyway. I move stuff from Autocad to AI fairly often. When you draw your graphic in Autocad, draw a bounding box of a known size around it. Now, export it as an eps, then open it in AI. Window the image with the box around it and in the...

The noses on these are made from 2" "dylite" styrofoam balls, quartered with a hotwire. I also use a hotwire to cut the styrofoam cups. All the sheet material is cut with a hotwire. The larger of the two has only flown by hand tossing it. It needs larger elevons. I haven't had a chance to...