flyrotary@lancaironline.net Mailing List Archive

Thanks for the info & the panel pic. Must be nice to have that much panel height. :-)

It's looking like the real killer is the fuel pump. If Dave's seen as low as 4 amps, that might mean that a turbine style pump with PWM controller would be worth pursuing. Yet another task to keep me from ever finishing....

Charlie

On 7/3/2014 12:53 PM, Mark Steitle wrote:

Charlie,

My 3-rotor, along with typical electrical devices running, needs 36 amps. This includes EC-2, EM-2, 6 fuel injectors, 6 ignition coils, 1 fuel pump, EFIS, auto-pilot, NavCom, Xpndr, strobes, and M/T Electric prop controller. Not sure what it needs just to keep the fan turning. My guess is that I could probably cut that figure in half by turning off the xpndr, radio, strobes, EFIS, and trailing coils. (It would be very interesting trying to fly without the EFIS.)

Thanks,

Mark

On Tue, Jul 1, 2014 at 7:19 PM, steve Izett <flyrotary@lancaironline.net> wrote:

Hi Charlie

I think these are in the ball park but not measured under flying conditions only idle.

ENGINE

EC2                                          .3

EM3                                         .5

COILS (D585) 5

INJECTORS (Renesis) 2

FUEL PRESSURE PUMP x 1 8.4

FUEL TRANSFER PUMP x 1 1.6

O2 SENSOR                             0.6

Total Engine                            18.4

Steve Izett

On 2 Jul 2014, at 5:08 am, Charlie England <flyrotary@lancaironline.net> wrote:

Has anyone with an ammeter installed measured their engine's actual current draw (controller, injectors, plugs, fuel pump) with everything but the engine shut down, and the alternator offline? IIRC, Bernie Kerr once did a battery duration test & discontinued after ~40 minutes, but I don't recall seeing any actual current measurements.

Thanks,

Charlie