Hello,
Carrying on my tow boogie voyage. After the dual motor tow dinghy, I had the opportunity to catch an empty Zerotow hull a good friend had . He did a real massacre on the zip so changed for a new hull. I succeded to repair the zip with a new slider thanks to the german supplier Tizip and a few hours of work with dual component pvc glue.
For the steering system I did not try to copy the amazing work of @Strongarm (pivoting pod), I went for an easier 70kg servo/rudder solution bringing down the actuator force needed . I had to bring the propeller 7cm forward but doesn’t seem to have a big effect. Centre propeller 17.5cm deep as original.
I opted for a Flipsky 70165, Sequre 14200 PRO Escape 32 esc and a Nelo surfski carbon rudder. Original alu box and battery inside (14S12P with BMS). The electrical box takes all the trust of propeller. It is blocked with side retaining angle bar under the inflatable part inside the boogie.
First build with a rudder. Easy to set with @ludwig_bre Bremote V2, possible to trim it when not perfectly positionned. I need a bit of constant right steering (around 10 degrees) to go straight. The rudder was too big at the beginning so I got a constant list on portside and excess list on take off. I chopped the rudder to avoid being caught by the waterflow and obtained a way better behaviour. I still have a portside slight list so I added 2kg weight on starboard (it would have been not necessary if I’d angled the ASA motor pod at 2 degrees to starboard)
