Originally Posted by TitoSoto
So would this boat of yours beat you to death when "semi-planning" on rough water? How much did this boat weight?
Actually I had 2. One I completely rebuilt for profit. 2 Chrysler Royal straight 8s. It would plane at about 19 knots and used a lot of gas. I only operated a couple times. Never figured the mileage. Only in a river. The 2nd boat I didn't plane it. It was a commercial fishing
boat when I got it. About 20-25 tons and heavier and deeper in the water than built. Bottom rub rail was submerged when loaded. Would do 14 knots with the engines screaming, but propped for trolling.
boat is also a semi. Built for the USCG in WWII and converted to a Monk design in the 70s. It did 22 knots with 2 850hp gas engines burning about 75 gallons/hour. Now I cruise
at 10 knots with 2 200hp DDs using about 8.5 gallon an hour. 83', 80 ton.
At the end of WWII most PT boats were scrapped. Almost all had broken keels from pounding in rough water. A friend bought one as built for tuna fishing
. Before converting, he took friends and family
for a joy ride. Ran outa gas and had to be towed in. Unknown to him, it used 50 gallons an hour/engine at speed (3x50).
I ran several planing boats in the military. Fine in small waves or smooth water. Pounding is miserable in big waves. One type had a tendency to flip in 3'+ when put hard over at speed when lightly loaded.
There is no solution to speed in a bigger boat without a high fuel price
. And running flat out leads to frequent engine