My next boat

Talk about and buy or sell boats that are suited to Seagull outboards here

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Horsley-Anarak
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My next boat

Post by Horsley-Anarak »

My next boat may well be a copy of an American design made by Sid Craft.
BU%2010'%20AB%20SID%20AND%20CHAMPION%20ENGINE.jpg
Build it light, modern materials could go well.

There is a very interesting site that has quite alot of information about them.

http://boatracingfacts.com/forums/showthread.php?t=3952

Must get the cardboard and tape out.

H-A
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Re: My next boat

Post by outboard »

Mmmmmmmmm, interesting. H-A or any of you high tech guys, can you explain to us novices how you'd start to design this for say to work with on freeship to convert into sizes and layouts. Or would you do this off the top of your head without any drawings, just play with cardboard?

Keep this thread going I like to see how you guys progress with these builds.
Horsley-Anarak
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Re: My next boat

Post by Horsley-Anarak »

I will not need to use a computer program to make this boat

When they were first built in the fifties, there were no PCs.

Even today some boat builders do not use plans, there was a piece on radio 4 about a rowing gig builder in Cornwall that did not use drawing. "If it looks right then it must be right". (could be that they don't have computers in Cornwall :) )

There is so much information available on the net, with a bit of digging you can learn how they were made and then adapt then to modern techniques.

There are plans and pictures that show every aspect. With a little scaling and a model it should prove simple enough.
Small frame.jpg
This boat has loads of wood in it, I am sure it can be made lighter. This size would weigh about 64kg in the fifties, but that was for up to 20hp engines. The smallest engine that I have seen mentioned is 7.5hp.

Make one at about 35 kg and a seagull might have a slim chance. :lol: It will never be doing 45 mph so it should not need loads of additional strength.

Charles L has warned me that he has seen hulls of this design and they do not go that well with Seagulls.

If it proves to be underpowered then I can always buy a classic Yank 10 hp.

H-A

P.S. "Play With Cardboard" :roll:
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Charles uk
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Re: My next boat

Post by Charles uk »

What you must remember HA that the bottom of this hull was designed to do between 30 & 40 Mph, hardly touching the water, with only the back 30% ish of it's hull getting wet.

The best ever "claimed" with a Century powerhead is 18 Mph not GPS verified, nowadays 12 to 14 mph is the speed for a good Century.

A hull like the one in your pictures should plane at 10 to 12 mph so you should just get up on the plane, but not fully out of the water & flying, & in for a rough ride in anything but ideal conditions.

Try a Minimost they're an easy & cheap build, go pretty good with a Seagull & will take 2 if you don't over do the crew's weight.
Make it idiot proof and someone will make a better idiot.
Horsley-Anarak
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Re: My next boat

Post by Horsley-Anarak »

But I don't like the Minimost.

Will look at making it light, could shorten it a touch.

Less weight, less water to push out of the way.

6mm bottom, 4mm sides, 3mm decks. Stitch and glue, might get it under 30kg.

I do prefer the shape, found a picture of another nice one.
sid small.jpg
Nice shape.

H-A
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Re: My next boat

Post by outboard »

Sorry H-A, I'll chose my words better in future. I meant to say, make a model in cardboard.
I like the look of it, but as for the perfmance epected and what reality will provide, that's an arguement I'll leave to you and Charles.

I'm off to see if I can find details of the Minimost to see what Charles is suggesting.

Gerard :oops:
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Re: My next boat

Post by outboard »

Right you guys, what's the positives and negatives with the Minimost, especially with a seagull? :twisted:
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Charles uk
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Re: My next boat

Post by Charles uk »

Cheap & easy to build, plans available free.
Price/performance pretty good.

Not bad looking, but takes 2 to carry.

Won't fly with a classic Seagull, but better than a clinker.
Make it idiot proof and someone will make a better idiot.
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Re: My next boat

Post by outboard »

Ok Charles, as much as I like clinkers I get the message.
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Re: My next boat

Post by outboard »

Have any of you guys built a Minimost? If so, what was it like with a seagull?
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Charles uk
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Re: My next boat

Post by Charles uk »

A good classic 102 cc Seagull will drive a decent light hull with a 150lb occupant at 10 to 12 mph, maybe a little more if you spend some time "race" preparing the engine.

A light Minimost will do that with a "good" century.

Have a look on the web for free Hal Kelly hull designs before you make a decision.
Make it idiot proof and someone will make a better idiot.
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Re: My next boat

Post by outboard »

Thanks Charles. Will take your advice. I'm certainly not going to rush this, so I'll check all options.
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Re: My next boat

Post by outboard »

Just spent a bit of time searching for free Hal Kelly hull designs, could only get pics of some of his boats. Maybe it's me but it looks like these boats have quite a bit of wood in their construction, thus meaning weight. Would you agree?
phil
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Re: My next boat

Post by phil »

Here's one Outboard, this site also has Minimax and Minimost as well as other free designs. Plenty info to build from, if you have had previous experience. Hal Kelley "Jinx" I think "Clarkcraft" site has "Airborne" for sale
http://www.svensons.com/boat/?p=Mechani ... rated/Jinx
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Re: My next boat

Post by outboard »

Hi Phil

I've no experience but the guys are keeping right. I saw the stuff you linked which made my eyes water, they look a bit advanced for the novice builder.

Gerard
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