jofarr, soddy tn http://www.csr-performance.com/=20 I have a potential safety question with using an electric pump, unless = the engine is using a magneto. The ignition system runs on battery/alternator power. If it and the FI = are run by an ECU, it too needs power. The fuel pumps need electricity. = There are other electric hungry mechanism that need power. In an alternator/battery failure (short of having dual alt and batt) = to have a water pump sucking 5 or more amps of power, this significantly = shortens the available flight time before engine stoppage. If the engine is magnitoed, when the electrons disappear and the pump = stops, all that will happen is that the engine will fry---- The result = will be the same Rich ------=_NextPart_000_0014_01C6A4BF.510D6920 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Rich, good questions, but like many of the choices = we in=20 alternative engines face, there is no yes/no, good/bad- just = another=20 risk factor with pros and cons to consider. I believe that = there is=20 some technical merit to using an electrical water pump such as reducing = pumping=20 HP losses, perhaps less weight, optimum coolant temp control,=20 etc. . You could also factor in your water pump current = load=20 into your overall power considerations and run with a larger battery to = get you=20 your minimum alternator-out time. But, I must admit that I find = the=20 reliability and no need for attention mechanical pump preferable for=20 myself.

Me?, I'm waiting for a pizeo = electric ignition=20 system and a mechanical fuel pump and then I can throw the=20 battery away {:>).

howe----- Original Message -----

From:=20 ARGOLDMAN@aol.com
To: Rotary motors in = aircraft

Sent: Tuesday, July 11, 2006 = 1:02=20 AM

Subject: [FlyRotary] Re: - EWP=20 Power

In a message dated 7/10/2006 11:43:35 AM Central Standard Time, = jesse@jessfarr.com = writes:
Have any of=20 you ewp folks looked at CSR Performance products stuff? They =
tell me=20 they have a high volume pump that fits into some good looking =
anodized=20 aluminum housings for big block car stuff that will pump up to 70 =
gpm=20 and is expected to last for 5500 hours or so; and, they have a = remote=20
that is something like davies-craig that is also expected to = last about=20 5500
hours and pumps around 35 to 37 gpm. They run in the $250 = to $300=20 range,
supposedly use about 5 or 6 amps; and, I would like to = learn from=20 someone
else's experimentation, if possible. = <g>
jofarr, soddy=20 tn

http://www.csr-performance.com/ =

I have a potential safety question with using an electric pump, = unless=20 the engine is using a magneto.

The ignition system runs on battery/alternator power. If it and = the FI=20 are run by an ECU, it too needs power. The fuel pumps need = electricity. There=20 are other electric hungry mechanism that need power.

In an alternator/battery failure (short of having dual alt and = batt) to=20 have a water pump sucking 5 or more amps of power, this significantly = shortens=20 the available flight time before engine stoppage.

If the engine is magnitoed, when the electrons disappear and = the=20 pump stops, all that will happen is that the engine will fry---- The = result=20 will be the same

Rich

------=_NextPart_000_0014_01C6A4BF.510D6920--