spaschal on DSK3GDR082PROD with CFR

Section 33.49

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

(2) A 20-hour run consisting of alternate periods of 11-2 hours at rated maximum continuous power with maximum continuous speed, and 1-2 hour at
75 percent rated maximum continuous
power and 91 percent maximum continuous speed.
(3) A 20-hour run consisting of alternate periods of 11-2 hours at rated maximum continuous power with maximum continuous speed, and 1-2 hour at
70 percent rated maximum continuous
power and 89 percent maximum continuous speed.
(4) A 20-hour run consisting of alternate periods of 11-2 hours at rated maximum continuous power with maximum continuous speed, and 1-2 hour at
65 percent rated maximum continuous
power and 87 percent maximum continuous speed.
(5) A 20-hour run consisting of alternate periods of 11-2 hours at rated maximum continuous power with maximum continuous speed, and 1-2 hour at
60 percent rated maximum continuous
power and 84.5 percent maximum continuous speed.
(6) A 20-hour run consisting of alternate periods of 11-2 hours at rated maximum continuous power with maximum continuous speed, and 1-2 hour at
50 percent rated maximum continuous
power and 79.5 percent maximum continuous speed.
(7) A 20-hour run consisting of alternate periods of 21-2 hours at rated maximum continuous power with maximum continuous speed, and 21-2 hours
at maximum best economy cruising
power or at maximum recommended
cruising power.
(c) Engines incorporating a gear-driven
two-speed supercharger. For engines incorporating a gear-driven two-speed supercharger the applicant must conduct
the following runs:
(1) A 30-hour run consisting of alternate periods in the lower gear ratio of
5 minutes at rated takeoff power with
takeoff speed, and 5 minutes at maximum best economy cruising power or
at maximum recommended cruising
power. If a takeoff power rating is desired in the higher gear ratio, 15 hours
of the 30-hour run must be made in the
higher gear ratio in alternate periods
of 5 minutes at the observed horsepower obtainable with the takeoff crit-

ical altitude manifold pressure and
takeoff speed, and 5 minutes at 70 percent high ratio rated maximum continuous power and 89 percent high ratio
maximum continuous speed.
(2) A 15-hour run consisting of alternate periods in the lower gear ratio of
1 hour at rated maximum continuous
power with maximum continuous
speed, and 1-2 hour at 75 percent rated
maximum continuous power and 91 percent maximum continuous speed.
(3) A 15-hour run consisting of alternate periods in the lower gear ratio of
1 hour at rated maximum continuous
power with maximum continuous
speed, and 1-2 hour at 70 percent rated
maximum continuous power and 89 percent maximum continuous speed.
(4) A 30-hour run in the higher gear
ratio at rated maximum continuous
power with maximum continuous
speed.
(5) A 5-hour run consisting of alternate periods of 5 minutes in each of the
supercharger gear ratios. The first 5
minutes of the test must be made at
maximum continuous speed in the
higher gear ratio and the observed
horsepower obtainable with 90 percent
of maximum continuous manifold pressure in the higher gear ratio under sea
level conditions. The condition for operation for the alternate 5 minutes in
the lower gear ratio must be that obtained by shifting to the lower gear
ratio at constant speed.
(6) A 10-hour run consisting of alternate periods in the lower gear ratio of
1 hour at rated maximum continuous
power with maximum continuous
speed, and 1 hour at 65 percent rated
maximum continuous power and 87 percent maximum continuous speed.
(7) A 10-hour run consisting of alternate periods in the lower gear ratio of
1 hour at rated maximum continuous
power with maximum continuous
speed, and 1 hour at 60 percent rated
maximum continuous power and 84.5
percent maximum continuous speed.
(8) A 10-hour run consisting of alternate periods in the lower gear ratio of
1 hour at rated maximum continuous
power with maximum continuous
speed, and 1 hour at 50 percent rated
maximum continuous power and 79.5
percent maximum continuous speed.

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VerDate Sep<11>2014

12:50 Apr 30, 2019

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