Boost Pump Annunciator

[Scott Will]

I did the exact same thing as Pete - orange LED from Radio Shack for $1.99. I made so many trips this past weekend to Aircraft Spruce (P/N 17-212), Fry's (Linrose Super Brite LEDs) and Radio Shack finding the best indicator lights to use. I tested them yesterday in the bright sun and actually found the Rat Shack LED to be the most readable... but it has to be almost directly in line with you.

I drilled the holes in my panel for them yesterday. I'll try to get some pics up soon (my memory card was full of Christmas pictures with our new baby - the kind with arms and legs).

my other indicator lights are going to be: EIS Warning, EFIS Warning, Low Volts, and maybe CO Monitor.

Happy New Year everyone.

[zilik]

Originally Posted by Ironflight

pump has been on for 20 minutes....at least for me it is! That can (slightly) screw up my fuel totalizer (reads 10% high when the pump is on).
Paul

I mounted the flow sender between the manual pump and the carb on my O-360-A1A. The flow remains the same with the boost pump on or off. There is a momentary (like 1 second) jump in readings when the boost pump is turned on or off but then it settles back down within a couple of seconds.

Gary

[osxuser]

Fuel pump on shouldn't affect FF on a carb engine, on a TCM (read ECI's FI) style system's Fuel pump is on, it WILL affect FF. On a Bendix style, is theoritically shouldn't, but still can to some extent.

[Ironflight]

Well, I was typing my previous message with a really lousy keyboard and no time...what I should have said is that I get a momentary jump in FF when I turn the pump on (and yes, you might think it shouldn't but nevertheless, it does!), and it does settle out after flow into the gascolator, etc. stops. My 'ducer is just downstream of the electric pump (a known compromise), and it sees the pulses from that loud thumper first-hand. (and once the -8 is running, you don't hear a thing from the pump!)

Overall, my calibration has been excellent, with a disagreement at fueling time of about one half gallon in twenty - more than good enough for me.

Paul

[rvator_md]

Gentlemen,

I initially had the white Cessna style switches to control the lights, pitot heat and fuel pump. Ran this way for about 300 hours.

When I did some wiring update to my avionics, I also changed the switches. I chose the Caltrans automotive rocker switches with a green led in the rocker that lights up when the switch is on. I have flown this configuration the last 80 hours, both day and night, and I like the fact that I can see at a glance which switch is on. At night, the little leds are not blinding at all, as the direction of the led is not pointing directly at my eyes.