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Author Topic: prop rotation for tug  (Read 1790 times)

neil.r

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prop rotation for tug
« on: April 06, 2012, 10:43:04 PM »

More questions!
What is the prop rotation for a single prop.
I am about to order a prop for my 1/32 scale Throstlegarth.
I have decided on buying from prop shop, I have decided upon a 3 inch, but do not know which rotation or pitch to buy.
Can you help me? :-)
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More Coffee

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Re: prop rotation for tug
« Reply #1 on: April 07, 2012, 03:40:48 AM »

Generally ..Brushed electric motors are more effecient on a righthand(clockwise) rotation..You'll notice the polarity tabs on them..

With that in mind ..get yourself a right hand prop.

Lets see your boat? :-))
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TailUK

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Re: prop rotation for tug
« Reply #2 on: April 07, 2012, 05:34:20 AM »

This may be of some help.

http://www.modelboatmayhem.co.uk/forum/index.php?topic=35272.0

R/H props have the advantage of being "self tightening" when the boats running forward.  Thread locking should handle the much shorter time it spends in reverse.
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Tug Fanatic

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Re: prop rotation for tug
« Reply #3 on: April 07, 2012, 08:15:38 AM »

I agree totally about prop rotation & tightening the prop but then most tug towing tugs are twin engined with contra rotating props & lots of power. Loosing props does not seem to be a problem.

Unless you are looking at the more specialist racing type motors they don't really mind which way they run as they are zero degrees timed - but they do get used to running one way or the other because of how they wear in the brushes. Most simple - one gear on the motor & one on the propshaft - gearboxes effectively reverse the direction of rotation of the motor & they don't mind.
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dodes

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Re: prop rotation for tug
« Reply #4 on: May 10, 2012, 08:52:47 PM »

I accidentally bought a left hand screw for my Girl class, primarly because it was a quality prop going cheap in a model shop. The model runs fine, except when it is put a stern then it cuts to starboard instead of port like the real ones did.
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