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Date: Thu, 6 Jul 2006 17:05:39 -0600
From: Bob White <rlwhite@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Nothing to do with Rotary Engines, but....
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You could be right George.  100 lbs was a complete WAG on my part.  I
did a quick search on google, but couldn't find any engine weights vs
hp, but I did find a site where someone made an electric drag car out
of a RX-7.  http://www.dragtimes.com/Mazda-RX-7-Timeslip-7519.html

They mentions using a 42 HP electric motor, but generating 300 HP from
it for the drag time.  Apparently electric motor hp and gasoling engine
hp don't correlate.  I'll leave it to Bill to give a knowledgeable
answer. :)

What is the hp rating and weight of the motor on your bike Bill?

Bob W.


On Fri, 7 Jul 2006 08:11:33 +1000
"george lendich" <lendich@optusnet.com.au> wrote:

> 
> > Hi Bill,
> >
> > I'm relieved.  I won't have to mortgage the house until the technology
> > advances enough to reduces the weight by a factor of 5. Currently it
> > looks like I would need about 1400 lbs of batteries.  Get it down to
> > 280 lbs and allow 100 lbs for the electric motor and my W&B will work
> > out about right. :)
> >
> > I'm looking forward to seeing what you come up with for the aircraft
> > batteries.
> >
> > Bob W.
> 
> Bob or Bill
> I would have thought a 130hp DC Motor  would weigh more than 100lbs.
> Any rule of thumb on weight of motor to power output ?- I guess there's a
> lot of copper windings per HP!?
> George (down under)
> 
> 
> 
> --
> Homepage:  http://www.flyrotary.com/
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-- 
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