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Re: [PSUBS-MAILIST]Motors



It seems like a whole lot of steel to hold those two poor little old motors. I'm using a quarter section of 1/8" aluminum (about 4X6 inch) welded to a stand pipe with a vinyl pad between the motor and support. The stand pipe bolts to pad eyes on the hull with nylon washers and bushings to isolate the motor, which in turn is held onto the cradle with two heat shrink coated SS pipe clamps. Easy on and easy off, and I've never seen one fail in service.
Vance


-----Original Message-----
From: ShellyDalg@aol.com
To: personal_submersibles@psubs.org
Sent: Tue, Dec 15, 2009 1:12 pm
Subject: Re: [PSUBS-MAILIST]Motors

Hi Vance. That looked like a good site. I have a question for anyone......
You all know I'm using the Minnkota 101s for my boat, and I am using MOSTLY stainless for the motor mounts, rudders, swivels etc.
I'm worried about the actual "clamp" that holds the motor body. I used regular 4 inch steel pipe at about 1/4 inch thick. I have a thin rubber sheet wrapped around the motor body and the steel pipe "clamp" holds the motor body snuggly. There's a strap that prevents the motor from slipping out of the clamp when the motor is put in reverse.
My question is......will the magnetic attraction of the steel adversely affect the motor ?
The permanent magnets in the motor grab the clamps and I'm worried that the attraction could draw power away from the armature or damage the magnets.
The simple "fix" is to cut off the steel clamps and replace them with stainless pipe of the same diameter.
I looked around a bit for stainless pipe of that size but at the time couldn't find any scrap stainless available, so went with the stuff I had laying around. I only need 4 pieces at 4 inches long, and could use the 12 gage sheet I have and roll it into new clamps. I planned on replacing those parts later anyway for corrosion resistance but if it's going to screw up the motors I'll do it before I mount them permanently.
Anybody know if exterior magnetic attraction affects the motor ?
Frank D.