I stumbled across this...

And thought it was an interesting read.

http://digitool.library.mcgill.ca:8881/ ... EN01-MCG02

I kinda wish I had a bunch of cash to make a monocoque cf frame.

You should go to McGill.

Cool read, thanks for digging that up. It wouldn’t really take a bunch of cash to build a monocoque CF frame. It could be done on a budget for less than a grand.

huh huh huh

huh huh huh


huh huh huh



You had to dig for that one, eh?

Yeah, I was just thinking of going with RTM, which you’d have to C&C a mould for. Doing the solidworks/cad wouldn’t be that bad, but I figure it’d be expensive to get the cam work done on the mould. I could also probably figure out some FEA and get it done, but it would be a long ass project. Then picking the right CF and resin mixture would be a trick. Maybe when I’m rich I’ll do this or just buy a koga Kimera.

RTM for a one-off? Have you seen this:


Imaginably there’s an intermediate level somewhere between vinyl tape and RTM. I’m thinking of doing resin infusion over a core. Surface finish might not be great, but that can be cleaned up afterward.

CAM work for foam isn’t too bad, though I’ve usually seen a minimum cost of several hundred dollars. Most of the tooling that I’ve seen done has been for large sailing boats, which is a whole different scale, so I’m not sure how the costs correlate.

Resin ain’t that hard. Pick CF fabric that has properties you like and is commonly available from some place like this:

http://www.fiberglasssupply.com/Product ... sheet.html

Then read the data sheets from the manufacturer. They give pretty specific recommendations for resins or resin systems. You can assume that since you’re using RTM that your resin/fiber ratios will be pretty good.

thanks for the link, so far i’ve gotten as far as the plastic bike.

no ones posted these yet?

http://www.sheldonbrown.com/rinard/howibuil.htm http://www.sheldonbrown.com/rinard/carbonTTframe.htm http://www.sheldonbrown.com/rinard/