I just purchased a Prindle 18 and would like help naming or finding something to support the mast at the rear of the boat like this setup 
to prevent the mast from riding on the rudder control bar.
Thanks!
http://www.thebeachcats.com/forums/viewtopic/topic/11193/start/0
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Rear Mast Support with "V" Stainless Steel
http://www.murrays.com/13-3002.html
MN3
search PRINDLE/HOBIE MAST SUPPORT on ebay
I am not the seller. It may give you an idea of how to make one or you can buy one.
Ron Beliech
Nacra F-18
Brandon, MS
Free.............
this is a hobie 16 but i'm sure you could use the same approach
So you're trailering it with rudders attached? I asked this question a while ago ( http://www.thebeachcats.com/index.php?module=forums&func=viewtopic&topic=15171) and the consensus was take the 5 min to attach the rudders on-site to avoid degrading their integrity in transport. For rudderless transport, I have a very simple,
Edited by mgoltsman on Sep 03, 2014 - 10:24 AM.
Huh. It ate 90% of my reply. Will add the description of a very simple, with photos, tonight π
Thanks guys! I'm sure I'll be able to rig something up, also appreciate the tip for rudderless transport.
Photos will have to wait till later, but here is the description of a very simple mast cradle that's working well on my P16. I had it on the highway over 65 and on side roads with potholes (at slower speeds), and never had a problem (yet). And the whole thing was under $15 and half hour of work at most.
I went to Home Depot and picked two concentric pieces of rubber piping that would fit into each other - not sure what they were but picked the two with biggest diameters and sturdiest walls that would fit into each other snugly. Put 3" wood screws through them so they won't separate, dremeled off the parts of the screws sticking out inside the assembly. Made two notches in the assembly - a smaller one on the narrower side for traveler rail and a larger one at 90 degree angle on the wider side for the mast. You can notch it with a sawzall or a utility knife, and it's easy to tune the size and shape of the notches to your boat.
To place the mast on the cradle, put the cradle across the rear cross bar, traveler rail in the notch, drop an end of a shorty bungee tie through the center of the assembly and hook it on the pad eye (the loop on the crossbar used to tie off the traveler line). Put the mast in the upper groove (narrow side down), wrap the bungee tie around it two or more times (enough to give it decent tension), pull the loose end back down through the assembly center hole and hook it again on the pad eye.
I DON'T think this thing is tall enough (about 4") to let the mast clear the rudder crossbar. You would have to rig something more clever. But without rudders, this thing works great.
I throw a ratchet strap over the mast, it's on a stand like the Murray's, wrap it around the rudders, tighten it gently and go.
The gudgeon pins are badly bend so will be replaced this winter, we have a relatively long one compared to you guys....
I took some advice I read in here, go sailing and fix as you go...
Take a piece of thin cardboard and place against rear beam, trace outline of top of beam onto cardboard, cut out outline and transfer form to 2" x 4". Use jigsaw to cut out form on 2 pieces of 2" x 4" about 6" long, cut a 12" piece of 2" x 4" to join the 3 pieces together forming a squared off "U". The legs of the inverted "U" should fit the rear beam, now measure in 4" from either end of the 12" piece and install two 4" uprights, you now have a mast cradle, the use of wood glue is optional as is the use of thinner wood...... π
That's cheating! You can wittle ANYTHING out of wood, even a whole boat with the mast! It does not count as clever unless you use something intended for a completely different purpose!
ratchets are for atv's
ropes and knots are for sailors .... just sayin π
MN3