To All single part EM2 users:
I just identified a problem which causes radio noise in some
installations.
There was a high frequency bypass capacitor left off the single piece
version of EM2. There should be a .33 uF 50vdc part (low series inductance
type, not electrolytic) from the +12v input line to ground near the
switching regulator chip. Don't know why I don't hear that much radio
noise on the bench and in some completed installations but the noise on the
+12 volt line is obvious.
Sorry for the inconvenience but send the unit back and I'll fix
it. No charge of course.
Tracy Crook, RWS
----- Original Message -----
Sent: Thursday, July 06, 2006 7:16
PM
Subject: [FlyRotary] Re: Nothing to do
with Rotary Engines, but....
It is all about duty cycle and cooling.
The motors in my
electric drag bike are rated at just 13 HP each, continuous duty. I run 170 HP
through each for just a few seconds.
Bill Dube'
Bob White
wrote:
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)
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