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I concur - sorta, I tried to run a little vacuum pump with an electric motor
and burnt my finger on that wire I hooked up to it. Not scientifically
speaking it used a lot of power pumping nothing (3 inch of quicksilver worth
of nothing that is) I think I'm going with the electric gyro btw..
I also tried to run that pump with my big drill press - that vacuum sucker
sucked a lot of amps!
I was surprised.
So since water is thicker than air I could see that a properly sized
electric motor with a high efficiency pump got to do more than 1 kW.
On the other hand someone ought to tell us how many cm^3 of water flow per
second it takes to remove the heat from a 160 HP developing 13B. Maybe a
balmy trickle through the engine does the trick anyways.
Does anyone recall how much of a trickle from the faucet a test stand engine
is using?
re
Marko
-----Original Message-----
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]On Behalf Of Ed Anderson
Sent: Thursday, October 02, 2003 4:52 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Electric Water Pumps and Heat Rejection
From: "Rino" <lacombr@nbnet.nb.ca>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, October 02, 2003 6:53 PM
Subject: [FlyRotary] Re: Electric Water Pumps and Heat Rejection
> Ed Anderson wrote:
>
> That analysis was based on the fact that the Mazda water pump
> > supposedly consumed 13-16 HP at 6000 rpm.
> >
> > Ed Anderson
>
> A half inch V belt will NOT transmit 13-16 HP for very long! I do not
> think that is a realistic value.
>
> Rino
I presume you are correct, Rino. The Mazda water pump is driven
by two "V"
belts on the older engines which would up the capability a bit. But, the
main point is - how much power does it really take to flow enough
coolant to
keep the rotary engine happy at 6000 rpm rather than how much power might
the pump be consuming.
I don't know the answer, but I agree 16 HP seems a bit on the
high side. My
point was that if you base analysis on erroneous data or assumptions, then
it would seem to follow that the answer you get is liable to be erroneous
{:>) Hopefully, Todd will get his bird back into the air with an
EWP and we
will have real world data/evidence.
Ed Anderson
>> Homepage: http://www.flyrotary.com/
>> Archive: http://lancaironline.net/lists/flyrotary/List.html
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