TM 1-1510-224-10
CHAPTER 7A
PERFORMANCE DATA E
7A-1. INTRODUCTION TO PERFORMANCE.
NOTE
Chapter 7A contains performance
data for the model RC-12Q aircraft.
Refer to Chapter 7 for the RC-12P
performance data.
The graphs and tables in this chapter present
performance
information
for
takeoff,
climb,
flight
planning, and landing at various parameters of weight,
power, altitude, and temperature. Examples explaining
appropriate use are provided for performance graphs.
NOTE
All flight performance data are based
on JP-4 fuel. The change in fuel flow
and other power/ torque data when
using JP-5, JP-8, aviation gasoline, or
any
other
approved
fuel
is
insignificant. The only exceptions
are figures 7A-51, 7A-63, 7A-72, 7A-
81, 7A-82, 7A-83, 7A-84, and 7A-85
which address aircraft range and
endurance when the fuel density is
approximately 6.7 pounds per gallon.
7A-2. HOW TO USE GRAPHS.
1.
All airspeeds and references to airspeeds in this
chapter
are
indicated
airspeeds
unless
otherwise noted.
2.
A reference line indicates where to begin
following the guidelines. Always project to the
reference line first, then follow the guidelines to
the
next
item
by
maintaining
the
same
proportional distance between the guideline
above and the guideline below the projected
line. For instance, if the projected line intersects
the reference line in the ratio of 30% down/70%
up between the guidelines, then maintain this
same
30%/70%
relationship
between
the
guidelines all the way to the next item.
3.
The Airspeed Calibration - Normal System -
Takeoff Ground Roll graph was used to obtain Vl
and VR indicated airspeeds (IAS). All other
indicated airspeeds (except stall speeds) were
obtained by using the Airspeed Calibration -
Normal System graph.
4.
The associated conditions define the specific
conditions from which performance parameters
have been determined. They are not intended
to
be used as instructions; however, performance
values determined from graphs can only be
achieved if the specified conditions exist.
5.
The graphs assume that the full amount of
usable fuel is available for all approved flight
conditions.
6.
Notes have been provided to approximate
performance with the ice vanes extended. The
effect will vary, depending upon airspeed,
temperature, and altitude.
7A-3. PERFORMANCE ILLUSTRATIONS,
GRAPHS, AND TABLES.
a.
Takeoff Path Profile - One Engine Inoperative.
(1)
Description. The Takeoff Path Profile -
One Engine Inoperative illustration (fig. 7A-1) describes
the nomenclature of the various segments of a takeoff
and climbout with one engine inoperative from brake
release to 1500 feet AGL.
(2)
Purpose.
This
figure
provides
a
schematic profile of a one engine inoperative takeoff,
from brake release to 1500 feet AGL, to help the pilot
visualize the process and to show where each segment
begins and ends.
b.
Airspeed Calibration - Normal System, Takeoff
Ground Roll.
(1)
Description. The Airspeed Calibration -
Normal System, Takeoff Ground Roll graph (fig. 7A-2)
depicts the relationship between indicated airspeed and
calibrated airspeed for the normal aircraft static air
source during the takeoff ground roll.
(2)
Purpose. This graph is used to determine
calibrated airspeed for a given indicated airspeed. Data
is provided for up and approach flap settings with the
gear down. The indicated airspeed values on this graph
assume zero instrument error.
c.
Airspeed Calibration - Normal System.
(1)
Description. The Airspeed Calibration -
Normal System graph (fig. 7A-3) depicts the relationship
between indicated airspeed and calibrated airspeed for
the normal aircraft static air source during flight.
(2)
Purpose. This graph is used to determine
calibrated airspeed for a given indicated airspeed using
the
7A-1
