597 

Federal Aviation Administration, DOT 

Pt. 25, App. F 

graduated cylinder for a 2-minute period. De-
termine the flow rate in gallons per hour. 
The fuel flow rate must be 6.0 

±

0.2 gallons per 

hour (0.378 

±

0.0126 L/min). 

(e) 

Calibration.  (1) Position the burner in 

front of the calorimeter so that it is centered 
and the vertical plane of the burner cone exit 
is 4 

±

0.125 inches (102 

±

3 mm) from the calo-

rimeter face. Ensure that the horizontal cen-
terline of the burner cone is offset 1 inch 
below the horizontal centerline of the calo-
rimeter (figure 8). Without disturbing the 
calorimeter position, rotate the burner in 
front of the thermocouple rake, such that 
the middle thermocouple (number 4 of 7) is 
centered on the burner cone. 

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10:12 Mar 18, 2014

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pmangrum on DSK3VPTVN1PROD with CFR