1. A picture (worth 10K words) is in "Low Power Laminar Aircraft Technologies" by Alex Strojnik, 1990, 3rd ed., pg. 133. He self publishes... (It is a bit obscure/exotic/esoteric and hard-to-come-by, if you are not an insider in the homebuilt aircraft scene... sorry, can't be helped) The Experimental Aircraft Association will have this publication, as will most of the material sources to be cited.... EAA Bookshop - 1(800)-843-3612 - WIS 2. Aircraft Spruce & Specialty Co. 1(800)-824-1930 1(714)-870-7551 - CA 3. B&F Aircraft Supply 1(815)-469-2473 - IL 4. Western Aircraft Supply 1(403)-275-3513 - Alberta, Can. 5. Alexander Aeroplane Co. 1(800)-831-2429 - GA 6. Wickes Aircraft Supply -(800)-221-9425 - IL
From experience, this geodetic construction is stiff and light.... Also, veneer wood skins, with foam or balsa core works well (not as light as geodetic)... Of course, where bearings/eyepiece/mirror are to be mounted, you need a filler and/or extra skin layers...
Honeycomb has always been expensive...For this, and other reasons, it is used infrequently in homebuilt aircraft...
Fiberglass is always heavier, compared to wood! This may not be as much of an issue in small telescope tubes, whereas airplanes have hundreds of square feet of surface...
If you have specific questions, or need a (crudely) drawn picture, feel free to correspond...
Denny K8DO@AOL.COM