CF mast Crane

Rcsailing.net General Discussion
1

I am about to take try number two of a Carbon crane. Will anyone who has done this chime in with ideas about design, number of lays ,methods etc.

Thanks
Don
Vancouver Island

2

Not used it for cranes but plenty stog enough, use Doug’s bent carbon rod method. Bassicaly wet out some carbon tow and pull it through some silicone tube, bend the tube round a jig to shape. Leave it till it goes off then cut the tube away from the rod…

Luff 'em & leave 'em.

3

It’s a masthead rig so it needs overhang front and back so I don’t think a rod of carbon is what I am looking for. I think I need a flat piece of CF but I’m not sure how many lays. The one I made before was two lays of 5.8 oz. but it buckled after a while. I thought rather than working my way up I would ask what others have done.

Thanks
Don
Vancouver Island

4

TRy making it in a T section, this will make it stronger

Peter

5

Don -

do you need it for a stand-off for foreward or rear stay?

If not - then a simple piece of Kevlar line with an enclosed gromment and loop at each end will provide a place to tie off your stays. Insert into hacksaw blade cut at top of mast. Much lighter, cheaper and easier to make than the CF idea.

If you need “stand-off” feature then follow Pete’s idea of a small piece of flat stock across the top of the crane to add strength and will give you a “T” x-section. Need more strength, add same to bottom for an “I” beam x-section.

6

It’s a US1M so it needs a stand-off front and back. I’ve been using a cap of turned aluminium with a vertical 1/16" thick flat crane. I want to duplicate it in CF To make it a little lighter and because I want to try messing with CF parts. I’m just not sure how thick to make the CF to equal the 1/16" aluminum,
Don