TM 1-1520-240-10
6-1-1
CHAPTER 6
WEIGHT/BALANCE AND LOADING
SECTION I. GENERAL
6-1-1. Purpose.
This chapter contains sufficient instructions and data so
that the aviator, knowing the basic weight and moment of
the helicopter, can compute any combination of weight
and balance.
6-1-2. Helicopter Compartment and Loading Diagram.
Figure 6-1-1 defines the compartments, shows the reference
datum line, and depicts other information essential
for helicopter weight/balance and loading.
6-1-3. Classification of Helicopter.
Army Model CH-47D is in Class 1. Additional directives
governing weight and balance of Class 1 aircraft forms
and records are contained in AR 95-1, TM
55-1500-342-23, and DA PAM 738-751.
TM 1-1520-240-10
6-1-2
Figure 6-1-1. Aircraft Compartment and Loading Diagram
TM 1-1520-240-10
6-2-1/(6-2-2 blank)
SECTION II. WEIGHT AND BALANCE
6-2-1. DD Form 365-3 Chart C — Basic Weight and
Balance Record.
Chart C is a continuous history of the basic weight and
moment resulting from structural and equipment
changes in service. At all times, the last weight and moment/
1,000 are considered the current weight and balance
status of the basic helicopter.
6-2-2. DD Form 365-4 (Weight and Balance Clearance
Form F).
This form is used to derive the gross weight and centerof-
gravity (C.G.) of the helicopter. The FORM F furnishes
a record of the helicopter weight and balance status at
each step of the loading process. It serves as a worksheet
on which to record weight and balance calculations
and any corrections that must be made to insure that the
helicopter will be within weight and C.G. limits. Sufficient
completed FORMS F must be onboard the helicopter to
verify that the weight and C.G. will remain within allowable
limits for the entire flight. Sufficient forms can be one
(for a specific flight) or it can be several. Several FORMS
F for various loadings of crew, passengers, stores, cargo,
fuel slingloads, etc., which result in extreme forward or
extreme aft C.G. locations and variations in gross weight,
but which remain within limits. There are two versions of
this form: Transport and Tactical; they are designed to
provide for the respective loading arrangements of these
two type aircraft. The general use and fulfillment of either
version are the same. Specific instructions for filling out
the form are given in TM 55-1500-342-23.
TM 1-1520-240-10
6-3-1
SECTION III. FUEL/OIL
6-3-1. Fuel and Oil Data.
The CH 47D is equipped with six fuel tanks and an integral
oil tank on each engine. The capacities of each fuel
tank and each oil tank are given in Chapter 2.
6-3-2. Fuel Weight and Moment.
Fuel moments for the forward auxiliary, main and aft
auxiliary fuel tanks are shown in figure 6-3-1. The fuel
arms for these tanks are constant thus, for a given weight
of fuel there is no variation in fuel moment with change
in fuel specific weight. The common auxiliary fuel tank
arm is 314.
The full tank usable fuel weight will vary depending upon
fuel specific weight. The gallon scales on figure 6-3-1 are
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