Author Topic: self-made tool for ship propellers  (Read 1694 times)

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KKossu

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self-made tool for ship propellers
« on: 23 Nov , 2011, 01:15 »
Hello!
I wanted to try to give something back, after getting tons of help from this forum. So, here's my prototype version of ship-propeller fastening tool. It's still in development, so any ideas are welcome. The alligator clips were too big, so I made smaller from coil-spring. Central shaft is next, height adjustment must be made easier.

Offline NZSnowman

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Re: self-made tool for ship propellers
« Reply #1 on: 23 Nov , 2011, 11:51 »

Offline Rokket

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Re: self-made tool for ship propellers
« Reply #2 on: 27 Nov , 2011, 04:41 »
tell us more!
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KKossu

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Re: self-made tool for ship propellers
« Reply #3 on: 29 Nov , 2011, 02:02 »
Ok
It works!  :D
The main ring is of steel, but any tube of reasonable wall thickness is probably ok. The lathe-made hub goes on the central shaft, which is adjustable through the nut fastened on the 2X4 base. I made cuts in the hub to the angle desired. (with Dremell cutting disc) Then the blades are fastened into the spring-loops at the end of the brass-tube made arms.
Then the ring is centered on the shaft, and the blades pushed into the cuts. I used Hydrocloridic acid brushed on the parts, to clean 
them for soldering, and then applied heat with a micro torch. Then I added soldering wire, just a tiny amount, to all 3 blades, and a little additional heat. Then some filing, sanding and polishing, and there be propellers!
The blades are made of brass-sheet, with a round steel punch, 8 mm, and 10mm, the desirable 9mm is missing!!

At the moment, the thing most in need of development is the spring-fastener, and the work continues..

Here are some pictures, VII-C sub being the test-subject

Offline Greif

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Re: self-made tool for ship propellers
« Reply #4 on: 29 Nov , 2011, 03:56 »
Very well thought out and made little tool KKossu.  I am impressed!

Ernest

Offline Rokket

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Re: self-made tool for ship propellers
« Reply #5 on: 29 Nov , 2011, 04:28 »
wow, nice work, props looks great
AMP - Accurate Model Parts - http://amp.rokket.biz