Mailing List flyrotary@lancaironline.net Message #43086
From: George Lendich <lendich@optusnet.com.au>
Subject: Re: [FlyRotary] Re: combined starter alternator
Date: Sat, 7 Jun 2008 15:54:50 +1000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
 
Tracy,
I believe your right on the money, but I continue to live in hope that things will get easier. I do however like to understand the issues involved in their development. Like yourself, my brother is an electrical engineer, but he doesn't have the same interest in Aviation - more is the pity.
George (down under)
 
My early 60s Suzuki 150 motorcycle had such a setup.
 
All your points are valid but are probably beyond realization not due to technical reasons but financial.  If you could spread the development costs over a million units it could happen. 
 
 Factoid :  during the last 55 years, 30,000 experimental aircraft (U.S.)  have been registered.   Perhaps 1 % of them had alternative engines.
 
If you wanted to do it yourself, you have only one place to start looking - Hybrid car drivetrains.
 
Tracy


 
On Tue, Jun 3, 2008 at 6:28 PM, George Lendich <lendich@optusnet.com.au> wrote:
Directed to the electronic wiz types.
 
This is not a development issue but an educational issue as I would like to understand the issues associated with developing a starter alternator.
 
Personally I believe a combined starter, alternator, flywheel, damper, timing wheel and pick up would be a great advantage (we live to dream).
Some systems use the combined starter alternator attached to the gear box shaft just, between the motor and the gearbox fluid damper. 
 
I believe from talking to Bill Jepson that getting sufficient power from the current winding used is problematic but that there had been major improvements in this field. Also reading a little on the Internet ( if I understand it correctly) an alternator is AC ( alternating current) and a generator is DC. As Batteries are DC and starters are DC, we would need to use a DC generator winding in the starter generator (someone tell if I'm wrong here).
 
Of course nothing is as simple as this, so I'm keen to understand the issues associated - from anyone out there in the electronics world!?
George (down under).


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