General Modeling > TIPS

self-made tool for ship propellers

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KKossu:
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.

NZSnowman:

Rokket:
tell us more!

KKossu:
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

Greif:
Very well thought out and made little tool KKossu.  I am impressed!

Ernest

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