A Photo & Discussion Forum for Wharram Design Enthusiasts
I use a length of 5/16" dyneema doubled up in a knotted loop through a hole in each (inner) end of my front beam. The eyes on my mooring bridle are shackled to the dyneema loops, rather than the beam. The dyneema shows no wear after two years - that stuff is amazing. Yes, 50 knots no worries. We get 30 knots here during the winter all the time. The mooring bridle is 1/2" 3-strand nylon which is nice and stretchy.
The building plans do indeed recommend tying the anchor briddle to the front beam and not the deck cleats "for serious anchoring". (To clarify: I'm talking about a Tiki 30 in my case.)
PS note that my beams are aluminum so the "holes" are in a thick plate bolted to the beams - would be more complicated with a wooden beam. We get high winds here but not so much waves (only one to two feet max). In a life or death situation at sea, a failure of the front lashings would lose the drogue and the beam. Don't know if the lashings are more or less fail safe than well designed hull strong points.