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Subject: Re: [FlyRotary] Rotary Engine Electrical Power
Date: Mon, 09 Jul 2007 13:17:52 -0400
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Fred, and Group,
FYI Mistral has decided to do the starter generator for weight savings=20
too. Francois mentioned it in a recent post.
Bill Jepson


-----Original Message-----
From: Fred Osborn <fosborn@infowest.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, 9 Jul 2007 9:36 am
Subject: [FlyRotary] Rotary Engine Electrical Power


Ernest Christley wrote 7/6/07, Message #38256, Re: Ford EDIS:=A0
=A0
4.7lbs isn't a great weight saver compared to some of the lightweight=20
alternators out there, but I don't think they're usually weighed with=20
the mounting brackets and pulleys from the engine side of the belt. We=20
can get more weight savings if we let the flywheel that we already have=20
double as a rotor.=A0
=A0
I agree, the thought of the rear counter weight whirling around just=20
stirring air while doing it's balancing function really bugs me. A=20
non-magnetic replacement carrying permanent magnets and surrounded by a=20
set of coils would just cost the added weight of the coils. How much=20
power and reliability do you want? Those coils together with a set of=20
power switching electronics and a position sensor could become a=20
starter/generator.=A0
=A0
I'm not all that excited by the use of permanent magnets for various=20
reasons. They do have the big advantage of simplicity. Eventually, the=20
goal should be the use of an Integrated Starter/Generators (IGS) such=20
as those being introduced in automotive applications. The power=20
switching devices required are now state-of-the-art and in volume=20
production for a wide variety of switched reluctance motor=20
applications.=A0
=A0
I have given serious consideration to working this area myself but the=20
recent installation of 3 more stents added to my previous 3 have caused=20
some equally serious consideration to "slowing down".=A0
=A0
Fred O.=A0
=A0
=A0
--=A0
Homepage: http://www.flyrotary.com/=A0
Archive and UnSub:=20
http://mail.lancaironline.net:81/lists/flyrotary/List.html=A0


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