Fuel tank calibration

[Gramin@aol.com]

Depth calibration for the large tank (applicable up to around Serial no. 100
)
for scaling depth measuring systems, e.g capacitance, float, pipette.

Inches to surface of fuel measured  from a datum 2" above the cockpiit module
top surface.  The actual height of the level in a full tank will vary
individually depending on the fit into the cockpit module.  This is a "one
side" measurement, so the reserve remains in the opposite side where the top
section of the graph applies, apart from a small difference due to the
asymmetric profile of the tunnel.

Points were measured every 4 litres (every litre below the tunnel level) but
only the turning points due to the change in section of the tank are shown.
Straight lines drawn between them will give the intermediate values, or the
inset formulae.


    0         10         20       30        40        50        60        70
litres (L)
in |     |     |     |     |     |     |     |     |     |     |     |     |
    |     |
18-o


                                                                          |--
unusable
17-
16-              0 to 10 ltrs
                                                  |
15-              in=18- 0.6xL
14-


                                                                            |
       
13-
12-            o
                                                                  |
11-
10


                                                                            |
 9-               10 to 40 ltrs
 8-                in=12-(L-10)/5
                                             |
 7-
 6-                                               o
                                |
 5-
 4-               40 to 60 ltrs
                                                 |
 3-                in=6-4x(L-40)/30                               o
          _ full
 2-


                                                                            |
 1-
 0-

|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----
|-----|    
     0         10        20        30        40        50        60        70
litres (L)

 Graham C.  G-EMIN