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I'm with you on this one, Jim. Leon knows his stuff. There are a couple of Mustang 5.0 drivers here in Mobile AL with EWPs and they love them. (I talked to them at our local race supply store while buying some aluminum AN fittings). One of them uses it on the oval track. Said he never had a problem with it, and it cools better while he is in the pits (I assumed for tire changes or ???).
I have a 12 volt bilge pump that I use for my bird bath/fountain that is run by a photovoltaic cell. (No battery or anything else). When the sun is out, the water flows through the pump and out the top of the water fountain. My little photovoltaic cell obviously doesen't put out that much power, but it runs the electric pump just fine. I had to put a valve inline to cut down the flow, or else the water would shoot up too high and I would have to keep refilling the birdbath/fountain with water. Don't know how many gallons per minute, but it has enough power to pump the water up 18 inches and come out the top of the fountain and continue upward another 8 inches. (That's why I had to cut down the flow). FWIW. Paul Conner
----- Original Message ----- From: "Jim Sower" <canarder@frontiernet.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, February 25, 2005 9:35 PM
Subject: [FlyRotary] Re: E-shaft permanent magnet alternator
As you wish. I have a rule though: "... when Leon's talkin', Jim needs to be listenin' ...". By the time I'm ready, EWP will be more proven than they are now. I figure that what's designed to work in a race is a good candidate for aircraft use. What's designed to work in an automobile at 1000 - 2000 rpm needs some work to operate efficiently at 6000 rpm.
I got to go with my man ... Jim S.
Bulent Aliev wrote:
Jim, I have a business selling DC pumps and will not dare replace my engine driven pump with an DC electric. NO WAY!
Todd is getting away with it in the frozen North, but I doubt it it will make it here. I have by my desk a 15 GPM 12V pump with 1” ports. This thing is bigger (about twice) and heavier than standard Lycoming starter. If the weight was not an issue, this is the pump I would consider as a minimum. Also I don’t like converting the engine’s energy into electric and than converting again into kinetic? Sorry to say on this issue I’m with PL.
Buly
On 2/25/05 12:08 PM, "Jim Sower" <canarder@frontiernet.net> wrote:
IIRC EWP is a lot more *efficient* than EDWP (absorbs much less
power). Dual EWPs make the system a couple of orders of magnitude
more reliable than single EWP and arguably single EDWP.
A bullet proof electrical system makes EWP *very* attractive to me
... Jim S.
Homepage: http://www.flyrotary.com/
Archive: http://lancaironline.net/lists/flyrotary/List.html
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