SECTION I. INTRODUCTION
7-1. INTRODUCTION TO PERFORMANCE.
The graphs and tables in this chapter present performance information for takeoff, climb, light planning, and landing
at various parameters of weight, power, altitude, and temperature. Examples explaining appropriate use are pro-
vided for performance graphs.
All light performance data are based on JP-4 fuel. The change in fuel low and other power/torque
data when using JP-5, JP-8, aviation gasoline, or any other approved fuel is insigniicant. The only
exceptions are igures 7-51, 7-63, 7-72, 7-82, 7-81, 7-83, 7-84, and 7-85 which address aircraft range
and endurance when the fuel density is approximately 6.7 pounds per gallon.
7-2. 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 irst,
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 V 1 and V R indicated
airspeeds (IAS). All other indicated airspeeds (except stall speeds) were obtained by using the Airspeed Calibration
- Normal System graph.
4. The associated conditions deine the speciic conditions from which performance parameters have been de-
termined. They are not intended to be used as instructions; however, performance values determined from graphs
can only be achieved if the speciied conditions exist.
5. The graphs assume that the full amount of usable fuel is available for all approved light conditions.
6. Notes have been provided to approximate performance with the ice vanes extended. The effect will vary,
depending upon airspeed, temperature, and altitude.
7-3. PERFORMANCE ILLUSTRATIONS, GRAPHS, AND TABLES.
Operators can expect an approximate 3 8 KTAS reduction in Cruise Power airspeed found in Chapter 7 of
RC-12P/Q Operator s Manual. Operator s should expect an approximate 7% reduction in maximum range
found in Chapter 7 of RC-12P/Q Operator s Manual.
a. Takeoff Path Proile - One Engine Inoperative.
(1) Description. The Takeoff Path Proile - One Engine Inoperative illustration (Fig. 7-1) 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 igure provides a schematic proile 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.