Questions about the tip tank pumps

[Tomas Linnet]

Hi

As I was crossing the Atlantic today I noticed the lamps for the tip tank pumps vent out as the tank was empty. Is this correct operation? I assumed the lights were on when the pumps is on, not to indicate flow. Fuel transfer took 1 hour to complete is that normal?

[wothan]

Hi

As I was crossing the Atlantic today I noticed the lamps for the tip tank pumps vent out as the tank was empty. Is this correct operation? I assumed the lights were on when the pumps is on, not to indicate flow. Fuel transfer took 1 hour to complete is that normal?

I guess the lights indicate fuel pressure from the pumps. So when the tanks are empty, they go out.

FinnJ

[Jarek]

Real transfer time is approximately 50 minutes to 1 hour and automatically (shuts off pump) stops transferring when the Tip Tank(s) empties. So expected flow rate is ~20gph.
Data is for tanks made by J.L. Osborne

D'Shannon's model has transfer rate of approx. 15gph:
https://www.d-shannon-aviation.com/imag ... A-1400.pdf

[Scott - A2A]

As Jarek said, the automatic shutoff is present in the Accu-Sim Bonanza.

Scott.

[Tomas Linnet]

Thank you for the explanation