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Old Apr 28, 2011, 09:54 AM
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epwierman's Avatar
United States, CA, Los Angeles
Joined Aug 2004
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Help!
Jet pump drive info

Greetings,

Looking for info from the guys that really know the hobby.

I'm trying to locate a jet pump for a large scale RC boat that will use a 5 to 10 hp electric motor; thinking something like a mini version of what is used on a PWC/ Jet ski.

Speed required is not fast, something on the order of 5 mph min, 10 mph max.

Big boat, 48 inches long x 30 inches wide, 150 to 200 lbs, lots of drag and salt water.

Good acceleration is desirable, and 5 second bursts are intended, so efficiency for acceleration is desirable, rather than for speed.

This drive does not have to be steerable, although left right, up down.

I understand this project is asking for something likey way outside of the ordinary.

If no pumps are available, then I would want suggestions for a screw solution that I can put a grate over, allowing water to pass through, but not fingers.

Hoping to find off the shelf products for this.

Any help or suggested source greatly appreciated!

Thanks,

Eric
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Last edited by epwierman; Apr 28, 2011 at 10:04 AM.
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Old Apr 28, 2011, 10:40 AM
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wparsons's Avatar
Canada, ON, Markham
Joined Aug 2008
8,783 Posts
This uses a jet drive and is electric, not sure on details of the drive though:

http://www.robotspodcast.com/forum/v....php?f=3&t=882

If you can find more details of it, you might find a useful drive.
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Old Apr 28, 2011, 01:54 PM
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785boats's Avatar
Brisbane- Australia
Joined Jul 2007
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Here's the biggest one I've seen.
http://www.hobbyking.com/hobbyking/s...dProduct=13388
Paul.
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Old Apr 28, 2011, 10:40 PM
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326 Posts
Reminds me of this http://wavejet.com/
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Old Apr 28, 2011, 11:30 PM
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coriolan's Avatar
Canada, BC, Vancouver
Joined Sep 2006
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You could make your own:
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Old Apr 28, 2011, 11:33 PM
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http://www.rcgroups.com/forums/showthread.php?t=1311309
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Old Apr 29, 2011, 12:59 PM
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Vancouver, BC
Joined Aug 2009
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Quote:
Originally Posted by sundogz View Post
Reminds me of this http://wavejet.com/
Or this: http://www.powerski.com/content/psi_index.php
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Old Aug 27, 2012, 04:13 AM View Post
ben007
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Old Aug 27, 2012, 09:07 AM
Boaters are nice people.
Sneek, Netherlands.
Joined May 2004
4,742 Posts
Hi Eric,

Check the MHZ jets:
http://shop.mhz-powerboats.com/category-11/category-22/

Regards, Jan.
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Old Aug 27, 2012, 12:37 PM
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Canada, ON, Ottawa
Joined Apr 2009
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You intend to have a 200lb hull at 48" long float? I would've thought that would easily sink.
The hobbyking jet drive and a 6 or 7kW motor would work if you were spinning 10-20k rpm, anything more than that wouldn't be reasonable. Not ure how fast it would go but you should definitely get 5 mph, probably get it on plane depending on the hull type. Do you have plans or a design drawn up? That could help.
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Old Aug 27, 2012, 07:41 PM
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boredom.is.me's Avatar
United States, GA, Buford
Joined Nov 2007
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Here has up to a 49mm impeller diameter.
http://www.cornwallmodelboats.co.uk/...upner_jet.html
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Old Aug 27, 2012, 07:50 PM
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United States, GA, Buford
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Quote:
Originally Posted by boaterguy View Post
You intend to have a 200lb hull at 48" long float?
good point...
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