Boat Building Forum

Find advice on all aspects of building your own kayak, canoe or any lightweight boats

Hollow crank shaft thoughts
By:Ed Valley
Date: 11/10/1999, 3:28 pm
In Response To: Help Scotty!- the warp tubes are warping! (mike allen)

> Another idea would be to use lo temp pvc tubing. I tried using some for a
> steam bender - worked great for 10 minutes and then the pvc became
> diseased. So stretch some of this stuff, glass it and connect up to the
> kettle, then scrape out.

> (pvc, mach, water hose or whatever - mache tube prob is best as it can
> permanently deform) around a curved surface that would match the eventual
> paddle profile.

Hi Mick:

I have been thinking of a way to make a hollow core _crank_ shafted paddle. Your comment about the pvc reminded me of a project my Boy scout troop undertook one fall. The goal was to outfit the entire troop with snowshoes for a winter hike. When the time came to make the frames, we had an external mold in the shape of the shoe's frame, and an 8 foot section of 1" pvc. Hot (reeeeaaally hot) sand was poured into the pipe and allowed to bake the pipe to the consistency of cooked spaghetti. It was then pressed into the mold and allowed to cool. The sand was poured out and the pipe remained in the shape of the shoe. I see no reason this could not be adapted to the paddle shaft project. But how to remove it? Reheating to the softening point would probably make it less durable under tension to draw it out of the cured tube.

Ed Valley

Messages In This Thread

Light paddles
Stan Woronko -- 11/9/1999, 1:49 pm
Re: Light paddles
Hank -- 11/9/1999, 11:07 pm
Re: Light paddles
Jeff DeJongh -- 11/10/1999, 6:42 pm
Re: Light paddles
Chris Luneski -- 11/9/1999, 8:36 pm
Re: Light paddles
Monte Rhodes -- 11/9/1999, 5:43 pm
Re: Light paddles
Don Beale -- 11/9/1999, 4:14 pm
Re: Light paddles
Shawn Baker -- 11/9/1999, 4:04 pm
Hollow Tube Query
mike allen -- 11/9/1999, 5:33 pm
Captain, we have a core meltdown in the drive
Paul G. Jacobson -- 11/10/1999, 5:05 am
Re: Captain, we have a core meltdown in the drive
Rehd -- 11/10/1999, 6:07 pm
Help Scotty!- the warp tubes are warping!
mike allen -- 11/10/1999, 12:59 pm
Hollow crank shaft thoughts
Ed Valley -- 11/10/1999, 3:28 pm
Was that your troop in Boy's Life?
Paul G. Jacobson -- 11/11/1999, 6:01 am
some more Hollow crank shaft thoughts
mike allen -- 11/10/1999, 4:24 pm
crank crank crank
Ed Valley -- 11/11/1999, 3:30 pm
Re: Hollow Tube Query
Preston Seu -- 11/10/1999, 12:51 am
Re: See WoodenBoat
Don Beale -- 11/9/1999, 6:27 pm
Re: WoodenBoat, Aug. '99
Mike Hanks -- 11/9/1999, 10:26 pm
Re: Hollow Tube Query
Dean Trexel -- 11/9/1999, 5:46 pm
Re: Hollow Tube Query
mike allen -- 11/9/1999, 5:57 pm
Re: Hollow Tube Query
Randy Knauff -- 11/10/1999, 1:18 am
Pls tell us more!
mike allen -- 11/10/1999, 2:06 pm
Re: Pls tell us more!
Randy Knauff -- 11/11/1999, 5:14 pm
Re: Hollow Tube Query
Gary Toffelmire -- 11/10/1999, 12:13 am
A Light Bulb Went On ...(hehehe)
mike allen -- 11/9/1999, 6:16 pm
a bit dimmer
Paul G. Jacobson -- 11/10/1999, 3:43 am
Re: No Merry Xmas Paddle :(
Rehd -- 11/9/1999, 11:54 pm
Re: No Merry Xmas Paddle :(
mike allen -- 11/10/1999, 2:00 pm
Re: No Merry Xmas Paddle :(
Rehd -- 11/10/1999, 5:40 pm
Re: A Light Bulb Went On ...(hehehe)
Dale Frolander -- 11/9/1999, 10:08 pm