441 

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. 

VerDate Sep<11>2014 

12:50 Apr 30, 2019

Jkt 247046

PO 00000

Frm 00451

Fmt 8010

Sfmt 8006

Y:\SGML\247046.XXX

247046

ER31JY03.019</GPH>

spaschal on DSK3GDR082PROD with CFR