Re: single or twin engine.
What does it matter if it's a planing or a semi-displacement hull if the speeds are the same and the fuel efficiency is the same or better? The semi-displacement hull is going to give you the better overall ride.
not wanting to hijack......but when did speed and fuel efficiency come into the equation?.
i was asked about single screw over 50 feet......and i mentioned any thing over 50 feet is mostly displacement with an inboard rudder set up.
Locally we?re famous for the Chesapeake deadrise. The deadrise is a semi-displacement hull famous for its rough water handling and its minimal HP requirements. This heritage manifests itself in a new breed of boats being built locally. The Judge 27' Chesapeake will run 35 mph with a single 225 HP outboard on the back.
27 is the boundary of single/twin applications.....that is why i said...........
those will mostly be displacement hulls.....not plaining......they will also be mostly inboard rudder, some with bow thrusters.
unless its a ciggarette with a big honkin single......
in the cruiser series of boats.....anything over 27 should be twins.... you need the ponies to move the weight as over 27 and you are looking at 8000 lbs (very generaly speaking). parking them is a real pain in high wind with a single screw.
The Judge 36' Chesapeake which weighs #12,500 will run 32 mph with a single 428 HP Cummins diesel. How many #12,500 cruisers will run 32 mph while burning just 17 GPH?
i have not seen the boat.....but more than likely, this is an inboard situation and not an i/o like the op was asking however.....the following still applies ......
those will mostly be displacement hulls.....not plaining......they will also be mostly inboard rudder, some with bow thrusters.
unless its a ciggarette with a big honkin single......
in the cruiser series of boats.....anything over 27 should be twins.... you need the ponies to move the weight as over 27 and you are looking at 8000 lbs (very generaly speaking). parking them is a real pain in high wind with a single screw.
if you have ever parked a big boat with a single screw in wind....you will know what a pain is. even in light wind....any cruiser over 30' is a sail....with a single....it is
very difficult if you start talking about 50 feet....with a single and a rudder........anytime you can park it properly. there is
always a comment from someone at the dock. in fact....it usually means throwing lines and being pulled to the dock in some manner or other....
on the other hand....if you mess up the parking job in a big rig.....there is
always a comment from someone at the dock. but in this instance....its not a comment you want to remember !!!!


cheers
oops