Table of Contents
Advertisement
CHAPTER 1. DESCRIPTION/OPERATION
SECTION 1. DESCRIPTION
1. General
The generator sets (see Fig. 1) covered by the manual are identified by Series No. 6911 & 6911A.
The various configurations of the set are identified by adding a dash number (-1, -2, etc.) suffix to the
Series number.
The generator sets in the 6911 series feature armatures with Hoover Bearings, Browning Coupler,
and different magnetic pole construction for the generator revolving field. This new armature can be
easily identified by the two copper rings on each end of the field coils and copper wedges between
the magnetic poles.
Series 6911A generator sets feature the same magnetic pole construction for the generator revolving
field as Series 6911 generator sets. In addition, Series 6911A generator sets also feature wide-type
Fafnir bearings on the generator.
The basic generator set which includes the engine, generator and all controls is identical for all mod-
els. Differences between models are those required by their respective mounting, such as trailer
mounting, tow tractor mounting, etc. Identification of different models within the Series will be ex-
plained later in the Description.
Information and instructions throughout the manual apply to all models. Information which applies only
to a certain model will be qualified and identified as such.
The purpose of the generator set is to generate and deliver regulated, 400-Hz electrical power to a
parked (or towed) aircraft for operation of the aircraft's electrical equipment when the on-board gener-
ators are not running. The engine, generator, and controls are designed into a compact unit which is
easily removable from a tow tractor. See Figure 2 for specifications and capabilities.
2. Orientation
For purpose of orientation and to familiarize operators and maintenance personnel with the location of
components, the radiator is considered to be at the FRONT of the unit. The generator and controls
are at the REAR.
RIGHT and LEFT are determined by standing at the rear end facing the machine. Thus, the generator
control box, output receptacle connector, and engine control panel are mounted on the LEFT side at
the REAR of the unit.
3. Special Features
The generator set has many special features which are later described more fully under the assem-
blies in which they appear. Some of the main features are mentioned here and described briefly.
April 30/96 Revised
OM-2031
1-1
Page 1
Advertisement
Table of Contents
