Robbe Paula III with an upgrade or two...
I like to trade. Love it, it’s fun, and I’ll trade what I’m not using or going to build either up or down for something I really want. That’s how I got the PT15. In with that trade came a just started Robbe Paula III. I decided to build her. Now, the newest version of this boat is the Paula IV, which has a much simpler system for the boom and winch. The original uses a small geared motor for the winch, actuated by a relay or reversing switch, and uses a micro switch to cut power when the boom reaches a predetermined position. The boom uses a spring loaded “hydraulic ram” to extend the boom, and on the other side a servo actuated 3 position locking arm. To bring the boom back to stowed position you unlock the boom and reel it in with the winch. The Paula IV uses an under deck servo driving a large double ended lever which is connected to the boom, and a sail winch servo for the winch. Guess which system I’m using?
Only problem is I didn’t have the parts for the lever and I don’t have a sail winch servo..so I made them. I defeated the stops in a standard servo gear train and glued the pot in neutral, and used 3 servo discs to make a pulley. The boom lever was another matter. Robbe uses what looks like a rudder tiller like the ones in their kits, or the Caldercraft units. On arm is cut off and it uses the brass insert as a bearing. I made one out of stacks of scrap Plura, used an 1/8th i.d wheel collar for the bearing. The hole for the bearing was drilled slightly undersized, the the collar was drove home in a vise and ca’d into place for good measure. I made a mounting plate out of plura and a piece of 1/8th piano wire and I had my lever!!! Woo-hoo!
I installed an 8.4 volt Speed 600, mounted the rudder and tube, made a support for the tube out of hard balsa,got all my under deck work done and bonded the deck and hull together with Stabilit. Hull paint is done. The Paula comes with a radar unit, I decided to do the same thing with and old micro servo that I did for the winch, made the radar housing a little taller and now I have a working radar that runs direct from a receiver channel. It’s mast mounted, and the mast is aluminum, so I made a slot whereby I could run the wires down. It’s painted now. Next thing on my list is the cabin.
Cash