building a mast

[ryanonthebeach]

Does anyone have experience or information on construction building techniques/ plans for
Rotating Masts & Wing Masts? Or just masts in general.
I've found a little information which I’ve posted http://www.psychosnail.com/blog/post/Rotating-Masts-Wing-Masts.aspx
but what I’ve got so far is very technical on aerodynamics etc. I'm looking for something
more practical.
I remember seeing a pdf on building a wooden mast some while back mast but can’t find it again.

Thanks!!!
ryanonthebeach

[Boston]

find a guy named Eric Spoonberg in this thing
he seems to be the mast guru
B

[rasorinc]

Everything I found said keep weight down up high and use Sitka Spruce in a series of laminations and overlaps. I'm not a sailor man so that is the best I can do. There is other wood, some used in wing spars in airplanes of WW 2
by the british and in the Japanese zero--they used wood from the Princess tree, tight vertical grain, light and very strong. I think they also called it the Kiri tree. Botanical name is Paulownia tree. Don't know what wood the British used in the Mosquito
Those planes could pull 3 Gs on their wings at speed. If you used crib framing when you laminate I can't think of anything stronger in wood, using epoxy. Also, you can create 2- 1"x 2" hollow spaces or 1"x1" where in conduit you can run a lighting ground and in the other space you could run 4 hot lines and 4 ground lines seperated by 2" of wood from the lihtning ground. I hate seeing exterior conduits. P.S. lay your conduit in as you build it==much easier.

[PAR]

Well, much depends on what you want, materials you'd like to use, the boat, the proposed rig, etc. Can you define a little more about your project needs for us. The very nature of masts and their use, requires a fairly good understanding of the engineering and aerodynamics involved. How else could you develop a structure capable of standing in building wind strengths.

[Eric Sponberg]

Call me and I can answer your questions.

Eric
(904) 460-9494
St. Augustine, FL

[thudpucker]

I saw plans to make a wooden mast of planks/glue in the "Wooden Boat" mag or the "Boat Builder" in the late 80's or early 90's.