Quote:(As for existing carbon fiber stuff, these guys make awesome scopes: Dreamscopes. )
Quote:pour glass (or another substrate?) into it (carbon fiber shell)
Quote:Quote:(As for existing carbon fiber stuff, these guys make awesome scopes: Dreamscopes. ) Did you see Dream's 24" mirror that weighs 28#?http://www.dreamcellularllc.com/60cm.htmHow much lighter can you ask for. And the mirror is nothaphazardly lightened. It has a ton of PhD level engineeringbehind it. It is made to sit in a custom carbon fiber cellthat has a CTE closely matched to the glass. I think Dreamstotal weight for a 24" f/3.5 imaging OTA is going to be about 100#. Compare that to an RCOS 24" that is 350#.
Quote:Quote:pour glass (or another substrate?) into it (carbon fiber shell)That would be a really neat way to turn carbon fiber into smoke allan
~Suneet NexStar 11 (XLT) 279.4mm f/10.0
Quote: I thought carbon fiber was very resistant to high temperatures?Some carbon fiber is heat treated at over 2200C: would it resist to molten glass?
Quote: "Epoxy resin copolymer with zero shrinkage can be obtained by copolymerizing epoxy resin E51 with the expanding monomer [..lots of incomprehensible chemistry stuff...]. This epoxy resin copolymer with zero shrinkage has been used as an adhesive to join the optical parts of a large optical telescope."
Nytecam 51N 0.1W Meade 30cm LX200 astrograph+C8+Ha+CaK PSTs+spectrographs SX M9+Lodestar-C+M CCDs/Canon 1100D DSLR My Meade astrograph-colour deepsky My supernova discovery My dome build/spectroscopes/DSO images/Lodestar colour images & videos
Living at a dark site, I make scope when I have the inclination. I also do woodworking, cycling and other outdoor activities
Quote:The lightest mirror I have ever seen was a framework of beryllium with a polished surface. The weight was less than 800 grams for around 11 inches in diameter.
Scopes & Stuff:
16" F5 Teeter/zambutoTom Osypowski equatorial platform10" F5 LightbridgeMid 70's RV-6Orion 100mm EDATMing:Low Profile Front Collimating Dob/Cell for 16" Conical MirrorFront Collimating Dob/Cell for 16" Standard MirrorDob Driver with novel azimuth friction clutch, and axial (rotating) electrical connection.Red Oak Observing PlatformRed Oak Combination Observing Chair (Post Pending!)
Quote: As for Dream blanks - these do seem to cut to the chase! I am toying with the idea of a cellular mirror for a fast 22"-24". What I am not clear on, however, is who figures their blanks? I wonder if the issue of print-through comes up for opticians who are used to monoliths? Joe