Very Silly Question

[Raggi_Thor]

Crude speed estimate in knots = 3 to 4 x (HP per ton) ^ 0.5
If you boat weighs one ton (total) and you have 25HP you can estimate speeds like 3x5 = 15 knots to 4x5 = 20 knots.

[Lew Morris]

Unseen...

Sorry, I'm not an naval architect/engineer.

But front the link to the 20' PT built by Jim Treleaven...

"...it has a 5 foot beam and is powered by a 35 hp Jet Ski engine."

At 20%, you are talking about a 16 foot hull... I'd think you could stuff a "jetski" plant into that length.

Build light; cold molded plywood and epoxy!

[unseencasper]

Originally Posted by Lew Morris

The fastest, and easiest way is to buy a set of 'model' boat plans and scale them to what you want using a photocopier. 1/20th is an odd one...

http://www.floatingdrydock.com/ptboat.htm

also try 'googling' "80' Elco" (PT593 was an 80 footer); "PT boats"

www.google.com

...i wanna know which engin u prefer..marine nitro or gas engin,,
or electric motor..

[SamSam]

Originally Posted by Woodser

Hey folks,

I am looking for either plans or a finished boat that is about 18' long. What I am looking for is something similar to a "Higgins Boat" of WWII fame. I would like to have a ramp on the front and a very shallow draft. Do any of you know of something like this or am I dreaming again?

Thanks for any help you can spare.

Woodser

I know this thread is almost 3 years old, but I think this is the sort of boat he was asking about. Does anyone know of any plans for something like this that you might be able to put a car or truck on? Sam

[unseencasper]

i need information about hydrofoils,,the material used in it...length limitation...ect..plz help