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Old Jul 29, 2007, 12:49 PM
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Cool
Saw a Disappearing Propeller Boat today...

Built 1920-something at Port Carling in the Muskoka area: "Disappearing Propeller Boat Company". Design competed with swing-up outboards for utility in the shallows... the prop and shaft could be cranked up into the chamber, sort of like a centerboard. This also serves as a speed control!
Looks to be cedar; lapstrake with clenched copper nails. Strakes are original, ribs and seats are new.

Pat M
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Old Jul 29, 2007, 01:06 PM
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no wings any more, just dust!
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that is quite cute,
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Old Jul 29, 2007, 02:58 PM
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Apparently also known as a "dippy". Here are a few more:

http://disproboats.ca/gallary/

PM
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Old Jul 29, 2007, 06:35 PM
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And just what do clenched copper nails look like? Like this!
Amazing that everyone from the Vikings to the Muskokans could do this and keep a dry boat... I can just imagine if I tried my hand at it...
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Old May 21, 2015, 04:47 PM
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Bump...
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Old May 21, 2015, 04:52 PM
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Quote:
Originally Posted by patmat2350 View Post
Bump...
Why?
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Old May 21, 2015, 05:32 PM
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Bump is sort of the noise that is made when driving the nails home. The metal block that you held on the inside which clinched the copper nails over is called a Bumping Block. Most of the dippys were single or twin cylinder engine powered with no reverse. There is a great little book about them called "The Greatest Little Motor Boat Afloat" which has plans for one. There is a website about them http://disproboats.ca/ they are 100 years old this year.
Regards,
Gerald.
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Old May 21, 2015, 05:37 PM
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Why, because it was just Victoria Day, so it's time to randomly revisit examples of great Canadian-built boats!
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Old May 22, 2015, 01:28 AM
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Okay, I sorta understand now.





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Old May 22, 2015, 07:03 AM
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What a great idea for the shallow water folks.
Beautifully build boat too.,,,bump
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Old May 22, 2015, 07:56 AM
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As seen above, the cast text on the housing reads "Disappearing Propeller Device...". The club's newsletter is called... "The Device".

Cute.
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Old May 22, 2015, 09:00 AM
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Quote:
Originally Posted by patmat2350 View Post
Why, because it was just Victoria Day, so it's time to randomly revisit examples of great Canadian-built boats!
Ah. That makes sense.

Andy
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Old May 22, 2015, 09:10 AM
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could you use this on a steam powered boat for speed control?
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Old May 22, 2015, 10:39 AM
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Quote:
Originally Posted by hazegry View Post
could you use this on a steam powered boat for speed control?
It might work, but it would not give you any reverse. Its main feature was to protect the propeller from rocks and logs. Speed control on a steam boat would usually be controlled by a throttle valve. If you wanted the engine to run at a set speed you could use a Kitchen Rudder or a variable pitch propeller.
Regards,
Gerald.
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Old May 22, 2015, 11:55 AM
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Tiller rope is a great idea....
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