When the aircraft is properly prepared for weighing, roll it onto the scales, and level it. The weights are measured at three weighing points: the two main wheel points and the nosewheel point. The empty weight and empty weight CG (EWCG) are determined by using the following steps with the results recorded in the weight […]
Determining the Empty Weight and Empty Weight CG (EWCG) Read Post »
Prior to being placed into service, each aircraft is weighed and the empty weight and CG location established. New aircraft are normally weighed at the factory and are eligible to be placed into operation without reweighing if the weight and balance records were adjusted for alterations and modificationsto the aircraft, such as interior reconfigurations. An
Weight and balance considerations of a helicopter are similar to those of an airplane, except they are far more critical, and the center of gravity (CG) range is much more limited. [Figures 1 and 2] The engineers who design a helicopter determine the amount of cyclic control authority that is available, and establish both the
Consider the helicopter in Figure 1. The first leg of the flight consumes 26 gallons of fuel, and at the end of this leg, the passenger deplanes. Is the helicopter still within allowable CG limits for takeoff? To find out, make a new chart like the one in Figure 2 to show the new loading
The empty weight and empty weight center of gravity (EWCG) of a helicopter are determined in the same way as for an airplane. See section, Single-Engine Aircraft Weight and Balance Computations. The weights recorded on the scales supporting the helicopter are added and their distances from the datum are used to compute the moments at
It is possible to load most modern airplanes so the CG shifts outside of the allowable limit. Placards and loading instructions in the weight and balance data inform the pilot of the restrictions that prevent such a shift from occurring. A typical placard in the baggage compartment of an airplane is shown in Figure 1.
Ballast | CG Change After a Repair or Alteration Read Post »
Empty Weight CG (EWCG) Range The fuel tanks, seats, and baggage compartments of some aircraft are so located that changes in the fuel or occupant load have a very limited effect on the balance of the aircraft. Aircraft of such a configuration show an empty weight CG (EWCG) range in the Type Certificate Data Sheet
Empty Weight CG (EWCG) Range and Adverse Load CG Checks Read Post »
A typical alteration might consist of removing two pieces of radio equipment from the instrument panel and a power supply that was located in the baggage compartment behind the rear seat. In this example, these two pieces are replaced with a single lightweight, self-contained radio. At the same time, an old emergency locator transmitter (ELT)
Aircraft manufacturers use different formats for their weight and balance data, but Figure is typical of a weight and balance revision record. All weight and balance records should be kept with the other aircraft records. Each revision record should be identified by the date, the aircraft make, model, and serial number. The pages should be
The Federal Aviation Administration (FAA) considers the addition or removal of equipment included in the Comprehensive Equipment List to be a minor alteration. The weights and arms are included with the items in the equipment list, and these minor alterations can be done and the aircraft approved for return to service by an FAA-certificate mechanic
Equipment List | CG Change After a Repair or Alteration Read Post »
