@ Macro'
Good idea and one that is used by Mach2 Moth to ship their boats around the country and the world made out of GRP.
www.kasail.com/mach2/view/1154No reason it would not work for windsurfing equipment as well.
When we went to Luderitz via Capetown, we got the following in just under our generous (double normal) airline weight limit of 56 KG:
1 x speed board
1 x speed sail
2 x booms
3 x RDM 100% masts
2 x RDM mast extension ans bases
Helmet, Harness, weight vest (no lead), a couple of fins and a few small tools and spare bolts.
We had extra sails coming back (the new sails we used were delivered direct to Luderitz from the factory) and no way it would have got under the limit.
If I go again I would only take two sails and two masts, but I very much doubt I could get it in under 60 KG with the lightweight bags. Excess baggage could be a killer expense, even with a lightweight aluminium container. And would it stand up to airline handling? GRP is probably stronger and safer but adds weight.