BendixKing KLR 10 - Manual (Page 7)

KLR 10 Lift Reserve Indicator Pilot’s Guide
P/N D201306000109 Introduction
Rev 1 Feb 2014 Page 1-1
1. INTRODUCTION
1.1 BACKGROUND INFORMATION:
The KLR 10 system is primarily designed to improve the pilot's
awareness of available lift during operations at high angles of attack
(AOA). Additional benefits include identifying or maximizing aircraft
performance based on a fixed AOA or a constant C L , such as
maximum range, best glide, climbs and approaches.
AOA:
Angle of Attack is the acute angle between the
wing chord line and the relative wind.
C L : Coefficient of Lift is a relative measure of an
airfoil’s lifting capabilities.
C Lmax : Coefficient of Lift Maximum is the AOA which if
exceeded will cause the airfoil to stall.
C D : Coefficient of Drag is a measure of total drag,
induced and parasite drag.
C L /C D : Coefficient of Lift over Coefficient of Drag is a
ratio between lift and drag.
C L /C D Maximum: The maximum lift-to-drag ratio at which
maximum range and maximum glide distance will
be found for propeller airplanes.
1.2 SYSTEM DESCRIPTION
The KLR 10 measures pressure at two points from an AOA probe
mounted solidly to the wing in reference to the cord of the wing that
conveys changing differential pressures, via sense lines, to the
KLR 10 IF module. The IF module converts the pressures into an
electronic signal that is transmitted to the KLR 10 indicator.
The KLR 10 indicator interprets the signal and turns on the
appropriate segments to convey the AOA or lift information to the
pilot. In addition to the visual display, the IF module also has an I/O
connector that allows connection of the remote audio interface
system that provides warning annunciations in the pilot’s headset.