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Old Feb 06, 2006, 09:24 AM
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Joined Aug 2004
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cheap prop balancer?

anyone have any ideas about a cheap prop balancer? or making one from scratch?
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Old Feb 06, 2006, 09:34 AM
Deletedfor proving Nauga wrong
Joined Mar 2005
15,855 Posts
find an appropriate diameter piece of rod for the hole in the center of the prop.

push the rod into the prop.... set on 2 water glasses wit the prop parallel to the ground.

heavy blade will drop.

The fancy ballancers are just that.... fancy.
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Old Feb 06, 2006, 02:42 PM
Are you one of these
rcboatnut's Avatar
loveland colorado
Joined Nov 2003
399 Posts
I think greatplanes has a magnetic prop balancer that is great, they are probably cheap or you could take the idea and make your own.
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Old Feb 06, 2006, 03:15 PM
aka: A.Roger Wilfong
gnofliwr's Avatar
Novi, Michigan, United States
Joined Jan 2001
2,542 Posts
The "Great Planes Fingertip Prop Balancer" http://www2.towerhobbies.com/cgi-bin...?&I=LXK247&P=7 is cheap ($4.29) and works pretty well. You can do the glass bit with it, or if you want, you can make it into a magnetic balancer. The trick is to have really low friction pivot points.

I use one of the Top Flight magnetic balancers ($19.99).

- Roger
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Old Feb 06, 2006, 09:16 PM
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Winnipeg, MB Canada
Joined Jan 2000
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Two magnets gooped to two long chunks of wood that are then clamped to the edge of your workbench, magnets facing each other. Place a hand held balancer, bought at the LHS for two/three dollars between the magnets with a tad of clearance and you have a balancer much superior to the commercially available variety. It'll handle props up into the 20" range which the commercial type won't because of the weight. Tex.
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Old Feb 07, 2006, 11:23 PM
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Depending on the strength of your magnets....
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Old Feb 08, 2006, 04:16 AM
It must have a machinegun
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Perth, Western Australia
Joined Sep 2004
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To balance a small prop, I put a couple of rare earth magnets in the jaws of a vice and used a drill bit as a shaft. I just closed the jaws until there was minimal clearance. It would work better if I had a sharper point on the shaft.
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Old Feb 08, 2006, 04:41 AM
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Dublin, Ireland
Joined Mar 2002
452 Posts
Cradle: 4 razor blades stuck into a block of balsa to make 2 vee shaped cradles.
This is an almost friction free mount for any gimbal you care to make....
I challenge anyone to show a magnetic cradle is better.

To make the gimbal which holds the prop use a piece of spare hardwood spar material - spruce or pine, pre drilled 1mm then jammed onto a drill bit, and turned down lathe-fashion with a file or sandpapered bar into 2 cones (with a hole through)
the hole will be automatically centred true once the turning - sanding process is done.

Finally push your wood cones on a bit of piano wire, (or any pin the right diameter), and rest across the cradle.

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