09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
172
WEIGHT AND BALANCE
The following will enable you to determine the weight and balance of your aircraft and to
operate it within the prescribed center of gravity limitations.
The S-21 OUTBOUND is a simple aircraft and so are the weight and balance
calculations.
The S-21 OUTBOUND is limited to two occupants.
For baggage storage, a baggage compartment behind the seats is available.
The compartment is rated for 180 lbs MAX
Baggage should be secured securely for flight.
To figure the weight and balance use the Sample Loading Problem and Center of
Gravity Envelope as follows:
Enter the following data on the chart. Refer to
FIGURE 13-02, FIGURE 13-02A
or
FIGURE 13-03
.
•
Weight of Main Gear
– Left.
•
Weight of Main Gear - Right.
•
Weight of Pilot.
•
Wing Fuel (at 6 lbs. / gal).
•
Header Tank Fuel (6 lbs. / gal)
•
Weight of Passenger.
•
Weight of Baggage (FWD & AFT).
•
Weight of Nose wheel or Tailwheel
Calculate the moments (Weight x Arm).
Add moments to obtain total moment.
Add weights to obtain total weight.
Calculate Center of Gravity.
(CG = Total Moment / Total Weight)
Check that the Center of Gravity calculated for take-off falls inside of the acceptable
Center of Gravity limits. Refer to
FIGURE 13-02, FIGURE 13-02A
or
FIGURE 13-03
.
Repeat for landing configuration.
