14 CFR Ch. I (1-1-19 Edition)

(Note: For blanket materials that cannot
be installed in accordance with figure 7
above, the blankets must be installed in a
manner approved by the FAA.)
(v) Conditioning. Condition the specimens
at 70Section Section5 SectionF (21Section Section2 SectionC) and 55% Section10% relative
humidity for a minimum of 24 hours prior to
testing.
(d) Preparation of apparatus. (1) Level and
center the frame assembly to ensure alignment of the calorimeter and/or thermocouple
rake with the burner cone.
(2) Turn on the ventilation hood for the
test chamber. Do not turn on the burner

blower. Measure the airflow of the test
chamber using a vane anemometer or equivalent measuring device. The vertical air velocity just behind the top of the upper insulation blanket test specimen must be 100 Section50
ft/min (0.51 Section0.25 m/s). The horizontal air velocity at this point must be less than 50 ft/
min (0.25 m/s).
(3) If a calibrated flow meter is not available, measure the fuel flow rate using a graduated cylinder of appropriate size. Turn on
the burner motor/fuel pump, after insuring
that the igniter system is turned off. Collect
the fuel via a plastic or rubber tube into the

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spaschal on DSK3GDR082PROD with CFR

Pt. 25, App. F