Chapter 5. OPERATING LIMITS AND RESTRICTIONS

TM 55-6930-214-10

CHAPTER 5

OPERATING LIMITS AND RESTRICTIONS

5-1. GENERAL. The CMS has a high degree of similarity to the actual helicopter.

Since the purpose of the CMS is for individual and crew proficiency and tactical

training, certain operations and functions of the aircraft are simulated only

partially or not at all. Those operations and functions that follow were

determined to have very low or no applicability for the enhancement of pilot and

CPG training and proficiency. General items include the following:

Transparent canopy plexiglass is not present

Canopy removal arm/fire mechanisms are installed but nonfunctional

Pilot lighting control panel is functional but limited

5-2. AVIONICS. Comnunications equipment provides for instructor and trainee

communications, but not actual signal reception or transmission. Discrete

frequency radio communications channels are not available. (Additional limitations

that exist with the avionics equipment are described in Chapter 3.)

5-3. TEMPERATURE AND HUMIDITY. The simulator compartments and motion systems are

required to operate in a comfort-controlled environment at a temperature of 75

(±10) OF (18.33 to 29.44OC) at a 50 (±5)% relative humidity. The computer complex

is required to operate in a controlled environment of 70 (±5)OP (18.33 to 23.88OC )

at a 50 (±5)% relative humidity.

a. In the course of operation, variations in room temperature must not result in

the development of relative humidity above 70% or below 30% at any temperature with-

in the range from 50 to 100OF (10 to 38OC). Temperature sensors in the equipment

cabinets are capable of sensing two overheat temperatures. At 100OF (38OC). they

Illuminate a light on the failure indications panel indicating that a particular

cabinet location is in an overheat condition. In addition, an aural warning is

activated. If the overheating condition is not corrected, the entire CMS complex

is automatically shut down when the temperature exceeds 110OF (44OC).

b. The internal temperature of the pilot and CPG CMS compartments is controlled

by separate, dedicated air conditioners ducted at supplementary outlets within the

compartment and the normal cockpit heating and defrosting ducts. Separate thermo-

stat controls are provided on the inside rear wall of each compartment. The cock-

pit air temperature controls, although present, are nonfunctional.

5-4. OCCUPANCY. During simulated maneuvers, safety reasons require that occupancy

of each flight compartment is limited to three persons: the trainee, an instruc-

tor, and an observer. Use of seat belts is mandatory while in motion.

5-5. MOTION SYSTEM. For multiaxis motion, the maximum platform excursion values

are given below with respect to a forward reference point. These values are

measured with respect to an origin established when the motion platform is con-

sidered to be at a neutral position: that is, with the hydraulic cylinder legs at

midposition:

Vertical

33 inches up, 38 inches down

±58 inches

Lateral

±53 inches

Longitudinal

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