Author Topic: Building the Cragsider  (Read 21000 times)

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chipchase

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Re: Building the Cragsider
« Reply #15 on: April 26, 2013, 12:49:02 »
Hi all here is the latest update on the Cragsider build.
Brian

CapnTroy

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Re: Building the Cragsider
« Reply #16 on: April 26, 2013, 21:49:16 »
Very impressive!

tugboyben

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Re: Building the Cragsider
« Reply #17 on: April 26, 2013, 22:23:04 »
As allways brain  first class build

 cool cool cool cool cool cool cool

Jason

kirkleesmodelboatclub

tugnut

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Re: Building the Cragsider
« Reply #18 on: April 27, 2013, 22:55:54 »
Very neet Brian,
john b

chipchase

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Re: Building the Cragsider
« Reply #19 on: April 27, 2013, 23:09:09 »
Thank you Gents, I will be posting photos showing how I got the build up to this stage.
Brian

caliph

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Re: Building the Cragsider
« Reply #20 on: April 28, 2013, 00:12:08 »
Superb job Chipchase, Quality. :) Brian.

Model Tug Man

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Re: Building the Cragsider
« Reply #21 on: April 29, 2013, 03:19:33 »
Well done, sir. Well done.
VGJQ

Footski

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Re: Building the Cragsider
« Reply #22 on: April 29, 2013, 07:51:08 »
Love that hull! cool
Barry

chipchase

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Re: Building the Cragsider
« Reply #23 on: April 29, 2013, 13:16:43 »
Thanks Barry I am quite pleased with the way she has turned out.

The problem with building a big model is everything on the model is big. My first job was the steerable nozzle, going of the plans the nozzle had an outside diameter of 150mm. I managed to get a length of plastic pipe with an outside diameter of 170mm inside diameter 140mm, this worked out great as I had a prop that was 130mm. the three photos show getting the pipe to look like a nozzle.

Brian

Footski

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Re: Building the Cragsider
« Reply #24 on: April 29, 2013, 13:26:10 »
Very clever and not easy to do!
Barry

chipchase

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Re: Building the Cragsider
« Reply #25 on: April 29, 2013, 13:47:28 »
I made the coupling for the nozzle drive shaft and threaded a 6mm stainless rod into the coupling and then pinned. The coupling was fitted to the nozzle using 4 nuts and bolts and securing with two part epoxy.
Brian

chipchase

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Re: Building the Cragsider
« Reply #26 on: April 29, 2013, 13:52:44 »
Here is a photo showing the prop that I have used.
Brian

chipchase

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Re: Building the Cragsider
« Reply #27 on: April 29, 2013, 14:09:48 »
The prop has a tapered hole so I made a brass boss that I would be able to fit a 8mm drive shaft to.
Brian

model tugman

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Re: Building the Cragsider
« Reply #28 on: April 30, 2013, 00:53:54 »
 ^-^  brian  great work so far, that was one of the problems that i faced when I built the Hendon the 5" prop and nozzle by she didn't half pull well, what motor are you going to use?  I used a direct drive Astra MK1 cooling fan motor.  Geo
Tugs are for life      George B

chipchase

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Re: Building the Cragsider
« Reply #29 on: April 30, 2013, 11:26:06 »
Hi George, here is a photo of the motor I used. I think it was used in a kidís scooter, had a test sail last weekend and wow can she pulls. I did an of load test on the motor and it pulled 0.67 amps, I did an on load test when I had her on the pond and all it pulled was 6.75 amps I was really impressed with the performance. I have seen this type of motor on eBay in the past I will have no hesitation in buying one if I see them for sale. The RPM at 24v is 2700 so 1300 at 12v is more than adequate for a 130mm prop.
Brian