"Picnic Boat" Hull shapes

I am trying to locate a source for line drawings (sections, profile, bodyplans etc) of the "picnic boat' style, along the line of those produced by Hinckley and the like. Can anyone help?

[gonzo]

Are you still looking for that set of lines?

[Willallison]

absolutely!

[gonzo]

I just finished lofting a lobster boat type for a customer. I modified an older design considering that modern engines are much lighter for the power than what was availble in 1912. The Hinckleys are based on the traditional "Hampton boats". What length and beam are you looking for? Also, those boats are fitted with both inboard and outboard engines.

[Willallison]

I guess my interest would lie in the approx 35ft LOA region. My interest stems from being 1/2 way through a yacht design course with Westlawn and I like to study as many plans as possible, so I'm not after a specific length / beam etc - but any info or leads would certainly be appreciated....

[SailDesign]

Will,
Forget trying ot track down lines plans of proprietary hulls - it is hard work and the benfits are not NEARLY as good as just plain walking down to the boatyard and looking at the real thing in 3D. What Westlawn has never taught, IMNSHO, is an appreciation for shape. YOu need to look at the finished boat to get this, as a lines plan can be decieving.
SPend time in the yard, look along chines, examine reflections as you look down the hull, etc., etc., etc.

[gonzo]

Hey saildesign, that may be easy for a Newenglander but rather difficult for an Aussie. It is unreasonable to say that one needs to see every design personally. Some of them don't even exist any more. I am not familiar with Westlawn, but in my experience, studying sets of lines is very good. I agree, that if possible, seeing the boat is helpful. However, a designer that can't visualize shapes from a set of lines won't be succesful.

[SailDesign]

gonzo says: However, a designer that can't visualize shapes from a set of lines won't be succesful.

My point prezactly! I was talking to a guy once - successful boatbuilder, had been for years, and was taking the Westlawn course. He showed me some plans that he had been given an "A" for - and the shape was just _wrong_. The techie aspects of the course are good, but the shape-sense is seemingly not taught.
Don't get me wrong - I have nothing against W'lawn per se, and know many good designers who got their start there. But..... you need to do a lot of homework that is not in the syllabus.
Lines plans are good - no question - if the real thing is not there.

[Willallison]

Can't really disagree with either of you - but.....

Ain't no picnic boats in Tasmania - and it's for that very reason that I've been hunting for drawings. It's not the topsides that I'm interested in either - plenty of pretty pictures of pretty boats about - it's the aspect that every self respecting lady likes to keep a secret that I'm interested in......the shape of their bottom

There are aspects of the W'lawn course that I would level criticism at - but (at least in the case of my tutor) aesthetics are an imprtant aspect of the critique's of the designs I submit. Then again, producing a design which is both attractive and meets all its design abjectives is an art and whilst the W'lawn text gives guidance in how to achieve this, I believe that artistic talent is not something that can easily be taught - you either got it, or you haven't.

[gonzo]

What's your mailing address? I can send you some plans.

[Willallison]

Wow - that's extremely kind of you - thanks!

Will Allison
3 Kunzea Road
Taroona
Tasmania
Australia
7053

[Tad]

Will;

The Hinckley "Picnic Boat" is not based on a Hampton Boat or even on a lobster boat. The hull is a warped-vee bottom incorporating wide chine flats and a low beam length ratio. Water line length at rest is 33'9", chine beam is 9'6" max, which is between station 6 and 7. The chine flat is about 6" wide at the transom, 4.5" at station 5 and zero at the stem. Dead rise is about 15 degrees at the transom, 18 amidships. The bottom sections are straight aft, becoming slightly convex from station four forward. Displacement is about 11,000 pounds, LCB at rest is at about station 6.1. Draft at rest is about 19" and the deepest point is about station 2. The chine runs flat from station 10 forward to about 7, then rises, emerging at about station 4, and ending about 16" above DWL at the stem. The hull is very fine forward.

The lines came from my experience, as always I started with a curve of areas and got the LCB right for the anticipated 30 knot speed. This hull also owes a great deal to my lifelong study of the work of William Garden.

All the best. Tad.

[gonzo]

I may be confused about the boat we are talking about. I take it from your post you are the designer.

[Tad]

Gonzo;

I take it from your post you are the designer

Yes. But I am just one of a number who make this claim.

One thing I should add regarding the "Picnic Boat" hull. Hamilton's guidelines for successful jet boats included a recommendation for a monohedron bottom. I was against this because of the obvious problem it creates with the entrance. So I grafted the warped forward sections on to an after body that is not a monohedron, but it is very, very, close.


Tad

[Mike D]

Now I'm stumped.

A polyhedron is a solid having many faces so is a monohedron a solid that has one face? Hmmm

Michael