Can explain what we are doing to solve the fuel quantity problem on our oldtimer MS880B Rallye
Bad news:
Low wing, huge dihedral, no dipstick on earth can measure that..
No flow meter or fuel computer.
Good news:
Tank transparent sight gauge tube with small ball float, present on the side of the cockpit.
But indication/measurements are never the same, because aircraft is never in ideal
horizontal position on the both axis.
So what we are doing?!
We are using digital inclinometer and drawing cross calibration/correction diagram X-Y on *360o with known
near top quantity of fuel in both connected wing tanks.
*Turning the plane full 360o on the same position.
Experience shows that such diagram is than usable to any quantity
bellow, down to unusable fuel minimum.
Read the sight
Measure the X angle
Measure the Y angle
read the diagram, find out the "real" fuel quantity
Hopefully, may help to someone
PS we are considering accurate fuel flow meter with ultrasound technology.
Mean no obstruction of fuel flow. The search is ON.
One known good solution, cost more than 11k GPB for sensor only!