Recently, on my Parker 630 with its 120hp oilburner and a mirage plus prop, I towed a Diva Royal 700
. I was using a bridle, and the water was dead calm. The length of the towing rope was about 4 boatlenghts.
I was surprised to be able of making 7kn through the water only, with the engine revving at 3,100revs (max rated for 4,200-ish). Higher revs immediately caused the temperature to rise.
My key learning was that in serious conditions it may be difficult to tow, at least this kinda objects. It might only be possible to assist in stationkeeping.
what is your experience on perfomance when towing - what is possible and what not?