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Old Dec 09, 2013, 04:11 PM
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Robert Pulse's Avatar
Davenport, Iowa
Joined Apr 2007
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Question
blue wonder 1500 kv outrunners

Anyone ever use these in a boat? Do you think they will run an inch and a half 3 blade prop similar to what is used for springers without smoking?
The only reason I ask Is I have two of them that I was going to use in a flying sub conversion.
Bob

http://www.giantshark.co.uk/product/...utrunner-motor
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Old Dec 09, 2013, 05:08 PM
NeverAgainVolunteerYourse lf
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Australia, QLD, Regents Park
Joined Mar 2007
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They will probably not be quite powerful enough, 1000 Kv 28 mm outrunners which draws 6 amps with a 40 MM prop, the extra RPM from the 1500 Kv will most likely push the amps to over the 9 amp rating of those motors. A smaller 1 inch prop will be OK I reckon.

Nick
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Old Dec 09, 2013, 05:45 PM
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Robert Pulse's Avatar
Davenport, Iowa
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blue wonders

Quote:
Originally Posted by nick_75au View Post
They will probably not be quite powerful enough, 1000 Kv 28 mm outrunners which draws 6 amps with a 40 MM prop, the extra RPM from the 1500 Kv will most likely push the amps to over the 9 amp rating of those motors. A smaller 1 inch prop will be OK I reckon.

Nick
I was worried about that. the props in the graupner mini jets I was going to use for the flying sub, is about 3/4" and that is half the size of the inch and a half.
Thanks Nick
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Old Dec 09, 2013, 09:09 PM
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United States, MI, Macomb
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Quote:
Originally Posted by Robert Pulse View Post
I was worried about that. the props in the graupner mini jets I was going to use for the flying sub, is about 3/4" and that is half the size of the inch and a half.
Thanks Nick
Why do you want such little power? Is this for a slow moving?
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Old Dec 09, 2013, 10:58 PM
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Robert Pulse's Avatar
Davenport, Iowa
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Little power

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Originally Posted by Tollytime View Post
Why do you want such little power? Is this for a slow moving?
LOL scale cruiser
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Old Dec 10, 2013, 02:48 AM
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They should be Ok for a 3/4 inch prop
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Old Dec 10, 2013, 02:32 PM
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Valencia, CA
Joined Oct 2002
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Quote:
Originally Posted by nick_75au View Post
They should be Ok for a 3/4 inch prop
How about the Blue Wonder for a 10" runabout with a 3/4" prop? I have an old Scientific, mostly solid balsa runabout that was for tether running with a 1/2A engine. I would love to put an transom-mounted rudder on it and go to e-power. I have a Blue Wonder -- maybe two -- and some Li-Po's lying about that would fit her "engine compartment.". Otherwise, I would be looking at something like a brushed 6V motor.

Conversion of this boat would not be for competition, but for restoration. She has been modified to look like one of the mono-hull full sized boats that ran in the Buffalo Launch CLub regattas in the late 50's and early 60's. I would like to be able to run her around for fun with the part-time assistance from one of my three grandsons.

Pete G.
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Old Dec 10, 2013, 02:47 PM
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Hi Pete,
Should be fine, I dont think it will be anywhere near the speed of the 1/2A motor but as its for your grand kids this is probably not an issue

1/2 A from a bit of interneting 18,000-22,000 RPM and around 100 watts

Blue wonder at 7.4volts 11,000 RPM(no load) and about 60 watts if its loaded to 6-7000 RPM

I don,t think a 3/4 inch prop will load it down that much

Nick
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