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Author Topic: Prop Fouling  (Read 2822 times)

RC Riviera 80

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Prop Fouling
« on: June 01, 2009, 02:50:22 pm »

 :(( Hi All

Well it was my maiden launch of my Riviera 80 over the weekend. The venue, my local park, Gunnersbury - West London.

The Riviera 80 is a electric RC boat, 2 ch radio. After adjusting the trim I shoved off! Great, she floats... now to put on some speed. Within 5 minutes I had come to a stand still in the middle of the lake. Finally with a breeze to the West my boat was blown ashore, to my suprise I had collected some Plastic tape around the prop. All cleared and off we went again! within a further 10 mins, dead stop; my new boat had cut out and was now mid lake on the way over to the swan nest. After taking my life in my hands and retrieving my boat, I found the prop fouled again; this time by a floating "Johnny".

After 30 mins of use, my engine began to smoke a little! is the right? Any ideas of how I can protect the prop from debris?

Are there any other local lakes that might be clean and "Johnny free" Anyone else in the area with the same boat?

It would great to get some feed back.

Cheers

Barry

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andyn

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Re: Prop Fouling
« Reply #1 on: June 01, 2009, 03:01:02 pm »

I'm afraid no lake is free of rubbish these days, and there's not much you can do about the prop.

Depends what motors you are using, but full on with a high speed brushed motor for half an our will most likely cause overheating, best to fit water cooling.
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regiment

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Re: Prop Fouling
« Reply #2 on: June 01, 2009, 03:15:52 pm »

come on down to perranporth cornwall  our lake is always clean  no trouble in 10 yrs
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RC Riviera 80

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Re: Prop Fouling
« Reply #3 on: June 01, 2009, 03:22:27 pm »

Love to visit you - a bit far for the weekend though!

Cheers.
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Martin [Admin]

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Re: Prop Fouling
« Reply #4 on: June 01, 2009, 04:03:09 pm »

A little bit of smoke is normal for a new motor but not much.
The motor stalling a couple of times won't have helped much either.
Once you've had a good clear run, the motor should be quite hot but not burning/sizzling hot,
if so you'll need water cooling, (do a forum search for water cooling, loads of stuff!). Or you may
just need to prop down a little.
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sheerline

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Re: Prop Fouling
« Reply #5 on: June 01, 2009, 04:51:43 pm »

Thee is a pond in Barnes, I think that's quite near you but not sure if it can be used for models though.
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OMK

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Re: Prop Fouling
« Reply #6 on: June 01, 2009, 04:55:39 pm »

Fabricate yourself a cage to fit around the prop'. Fine wire mesh to keep those johnnies out. An old tea-strainer, maybe?
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BarryM

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Re: Prop Fouling
« Reply #7 on: June 01, 2009, 06:04:06 pm »

Somebody with a better memory than me might remember an advert in the mags for slipping shaft couplings designed to prevent burnout.  Otherwise have a look here for friction couplings. http://www.huco.com/

I assume the motor is also protected by fuses?

Barry M
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Martin [Admin]

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Re: Prop Fouling
« Reply #8 on: June 01, 2009, 06:52:07 pm »

make a miniature one of these!
http://www.prop-protector.co.uk/
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jonny shoreboy

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Re: Prop Fouling
« Reply #9 on: June 01, 2009, 08:35:44 pm »

Which lake in Gunnersbury did you play on? The Round Pound or the Fishing Lake?
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Rex Hunt

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Re: Prop Fouling
« Reply #10 on: June 01, 2009, 09:14:10 pm »

Cover the hull in Vaseline.......perishing thing will drop off!

Or use KY ...it should just slip off then!


Sorry......I'll get my coat.......comments may have been ill-concieved.
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BarryM

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Re: Prop Fouling
« Reply #11 on: June 01, 2009, 10:41:21 pm »

Somebody with a better memory than me might remember an advert in the mags for slipping shaft couplings designed to prevent burnout.  Otherwise have a look here for friction couplings. http://www.huco.com/

I assume the motor is also protected by fuses?

Barry M

Got it now - The auto slip/auto reset couplings were sold by Mobile Marine Models but now are not listed in their catalogue. Instead they list shear-pin couplings. Anyhoo, maybe worth an email or phone call?
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RC Riviera 80

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Re: Prop Fouling
« Reply #12 on: June 02, 2009, 08:52:28 am »

Hi Jonny

I used the round pond, not to bad! I was the only boat on the pond. I think Ill continue until I am asked to move. Early morning 09:00 could be a good time, no one around.

Are you afloat now with your boat?

Regards

Barry
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RC Riviera 80

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Re: Prop Fouling
« Reply #13 on: June 02, 2009, 08:55:51 am »

Thanks for the advice... The motor does not have a fuse in-line - a good idea!  How do I cool an electric motor?

Barry
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dan

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Re: Prop Fouling
« Reply #14 on: June 02, 2009, 09:10:45 am »

you cool them by using water coils. there are different sizes depending on your motor. scroll down the link below and you will see them.
http://www.westbourne-models.com/electric-motors-drive-sets-for-model-boat-1727-0.html
these fit over your motor, one end will be linked to a water pick up pipe, these are normally placed behind the prop so water is pushed up through the coils, then another silicone pipe goes from the other end of the coils and out through the side of your boat where the water exits. you will need to drill a couple of extra holes to fit these pipes behind the prop and out the side of the hull. 
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DickyD

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Re: Prop Fouling
« Reply #15 on: June 02, 2009, 09:43:25 am »

What you need and how to water cool an electric motor







All available from www.cornwallmodelboats.co.uk
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malcolmfrary

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Re: Prop Fouling
« Reply #16 on: June 02, 2009, 10:50:42 am »

The tea strainer idea will work for larger debris at the cost of some performance.  Finer weed will find its way through and tangle with the prop.  Larger stuff  might stop water flow over the prop, but stopping, or a brief burst of reverse might clear it.  One of my more effective near cures was a spike pointing due down just in front of the prop.  This caused weed, feathers etc to be deflected down and out of the flow through the prop.  If a honed brass prop had been fitted, some mincing might have happened as well.
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RC Riviera 80

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Re: Prop Fouling
« Reply #17 on: June 02, 2009, 11:05:32 am »

Hey thanks guys..........

Lots to think about and get on with !!!

Cheers
Barry  ;)
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Circlip

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Re: Prop Fouling
« Reply #18 on: June 02, 2009, 03:54:00 pm »

Gerra ED racer in it, Never had "Debris" problems with a propper motor.

  Regards Ian.    :-))    %)
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jonny shoreboy

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Re: Prop Fouling
« Reply #19 on: June 02, 2009, 08:45:39 pm »

Hi Jonny

I used the round pond, not to bad! I was the only boat on the pond. I think Ill continue until I am asked to move. Early morning 09:00 could be a good time, no one around.

Are you afloat now with your boat?

Regards

Barry

Not quite yet, but very close... :-))
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funtimefrankie

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Re: Prop Fouling
« Reply #20 on: June 04, 2009, 09:18:49 pm »

Got a tent round my prop last week.

It was the 1:1 on the Shropshire Union, near Elesmere Port.
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andyn

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Re: Prop Fouling
« Reply #21 on: June 04, 2009, 09:49:34 pm »

Got a tent round my prop last week.

It was the 1:1 on the Shropshire Union, near Elesmere Port.

I hope there wasn't anyone camping in it...

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dougal99

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Re: Prop Fouling
« Reply #22 on: June 04, 2009, 10:19:12 pm »

Got a tent round my prop last week.

It was the 1:1 on the Shropshire Union, near Elesmere Port.

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