Planing craft design

Hi all,
I am doing my thesis on the design of a prismatic planing hull. My question is,
What are the main parameters which are important to consider when designing such craft?
For example what deadrise angle, beam etc...

Thanks

 

Planing hull

Hi all,
I am currently doing my thesis on the design of a planing hull. What are the main parameters to consider when designing such a craft? Also, is there any specific design cycle which is solely for planing craft? The one i found is from the book by Lars Larsson, but that is for yachts.

Thanks

 

Google?

 

You get a plastic bathtub and make sure the aft 2 feet are flat. You put a midline directional skeg on it. Then you put a 200+ hp OB on it and you have the typical planning boat. Beyond that you have refinements which may or may not mater in the face of brute HP.

 

Savitsky? Clever bloke, wrote a few papers on the subject.

 

You could try The Naval Architecture of Planing Hulls by Lindsay Lord. That is an old book that lays out the planing principle pretty well. Some of L. Lords conclusions have come under attack however. In any case it is an easy read.

 

When you say "the design of a prismatic planing hull", could you be more specific? The term "design" is awfully wide.

For design from the resistance/propulsion point of view, Daniel Savitsky's "Hydrodynamic Design of Planing Hulls" is a good starting point. A copy in PDF format can be found somewhere on this forum (just search for the surname).

BTW, deadrise angle and beam are some of the most important parameters, yes.

 

Chapelle studied under Lord and his work came under question as well.

 

Hi
Thanks for posting back. I have to design mainly the hull shape. I read that paper by Savitsky, It is very interesting but from what I read, you need parameters such as LCG, b etc... before applying the computational procedure. Thus i have to start by designing the hull shape selecting the type of engine, appendages etc...

 

<Duplicate threads merged: rather than having two parallel discussions going on the same exact question, it's best to keep the discussion together in one thread.>

 

I've read that Phil Bolger worked for Lord briefly, but don't recall seeing anything about Howard Chapelle. Did Chapelle ever design a planing boat?

 

I suspect so, but can't think of any published designs. I do know he was involved with ship design (cargo, passenger, tankers, container, etc.) with the Maritime Administration and DOT in the 50's and 60's. You'd think he would have done a runabout at least once. The Smithsonian may have something.

 

Lord taught at George Washington University. Chapelle may have studied at Webb (grad 1923 according to one source, another says he dropped out) and then worked in the offices of CD Mower, William Gardner, William Hand, Walter McInnis, and John Alden. Opened his own design and surveying office in 1930. WWII he ran R&D for Marine Transportation (US Army). 1950 studied naval architecture at the National Maritime Museum in Greenwich, England. 1957 became curator of transportation at the Smithsonian and stayed there until retirement in 1971. Virtually all of Chapelle's designs are adaptations of traditional boats, he was not creating hull forms (though apparently was taking some license with them) but recording them. I would doubt he would be involved in planing hulls.

 

I misspoke about his studying under Load. I have information he worked with him in some fashion, possably in the 40's or 50's.

 

Chapelle worked for the WPA as part of the Historic American Merchant Marine Survey for a year or so in the 1930's.

A PhD thesis was written about Chapelle a few years ago. Unfortunately it doesn't seem to be generally available. ProQuest (formerly University Microfilms) is supposed to have a copy from which they make and sell copies, but was unavailable the last time I looked.