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Weight and Balance
General, Oral study guide
22
Aviation
Undergraduate 1
03/13/2013

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Cards

Term
WHERE MUST A RECORD BE KEPT OF THE CURRENT EMPTY WEIGHT AND THE CURRENT CENTER OF GRAVITY OF AND AIRCRAFT?
Definition
THE AIRCRAFT FLIGHT MANUAL OR WEIGHT AND BALANCE RECORDS REQUIRED BY 14 CRF ss23.1583
Term
WHAT IS MEANT BY THE DATUM THAT IS USED FOR WEIGHT AND BLANACE COMPUTATIONS?
Definition
A READILY IDENTIFIED REFERENCE CHOOSEN BY THE AIRCRAFT MANUFACTURE FROM WHICH ALL LONGITUDINAL LOCATIONS ON THE AIRCRAFT ARE REFERENCED.
Term
WHY ARE ALL THE DISTANCES OF ALL THE ITEMS INSTALLED IN THE AIRCRAFT MEASURED FROM THE DATUM WHEN COMPUTING WEIGHT AND BALANCE?
Definition
THIS MAKES IT POSSIBLE TO FIND THE POINT ABOUT WHICH THE AIRCRAFT WOULD BALANCE. (CENTER OF GRAVITY)
Term
WHAT ARE TWO REASONS WEIGHT AND BALANCE CONTROL ARE IMPORTANT IN AN AIRCRAFT?
Definition
  1. SAFETY OF FLIGHT
  2. MOST EFFICIENT PERFORMANCE
Term
WHAT IS MEANT BY MOMENT WHEN COMPUTATING WEIGHT AND BALANCE?
Definition
A FORCE THAT TENDS TO CAUSE ROTATION. (THE PRODUCT OF WEIGHT OF AN OBJECT IN lbs AND THE DISTANCE OF THE OBJECT FROM THE DATUM IN INCHES.)
Term
HOW DO YOU FIND THE MOMENT OF AN ITEM INSTALLED ON A AIRCRAFT?
Definition
MULTIPLY THE OF WEIGHT OF AN OBJECT IN lbs AND THE DISTANCE OF THE OBJECT FROM THE DATUM IN INCHES.
Term
WHAT IS MEANT BY THE ARM OF AN ITEM INSTALLED ON AN AIRCRAFT?
Definition
THE DISTANCE IN INCHES, BETWEEN, THE CENTER OF GRAVITY OF AN ITEM AND THE DATUM.
Term
WHY MUST WE CONSIDER THE CATEGORY UNDER WHICH AN AIRCRAFT IS LICENSED WHEN WE COMPUTE ITS WEIGHT AND BALANCE?
Definition
DIFFERENT CATEGORIES UNDER WHICH AND AIRCRAFT IS LICENSED HAVE DIFFERENT MAXIMUM GROSS WEIGHTS AND CENTER OF GRAVITY RANGES.
Term
WHERE CAN YOU FIND THE LEVELING MEANS THATS ARE SPECIFIED FOR THAT PARTICULAR AIRCRAFT?
Definition
IN THE TCDS FOR THE AIRCRAFT. (TYPE CERTIFICATE DATA SHEETS)
Term
WHERE IS THE ARM OF AN ITEM INSTALLED ON A AIRCRAFT RECORED?
Definition
IN THE TCDS FOR THE AIRCRAFT.
Term
WHAT MUST BE DONE TO FIND THE EMPTY WEIGHT OF AND AIRCRAFT IF IT HAS BEEN WEIGHED WITH FUEL IN ITS TANKS?
Definition
THE WEIGHT OF THE FUEL AND ITS MOMENT MUST BE SUBTRACTED FROM THE WEIGHT AND MOMENT OF THE AIRCRAFT AS IT WAS WEIGHED.
Term
WHAT IS MEANT BY TARE WEIGHT THAT IS USED IN WEIGHT AND BALANCE COMPUTATION?
Definition
THE WEIGHT OF THE CHOCKS AND OTHER ITEMS USED TO HOLD THE AICRAFT ON THE SCALES.
Term
WHAT MUST BE DONE TO THE TARE WEIGHT WHEN AN AIRCRAFT IS WEIGHED?
Definition
THE TARE WEIGHT MUST BE SUBTRACED FROM THE WEIGHT OF THE AIRCRAFT.
Term
WHAT IS MEANT BY MINIMUM FUEL AS IS USED IN THE COMPUTATION OF AIRCRAFT WEIGHT AND BALANCE?
Definition
NO MORE FUEL THEN THE AMOUNT NECESSARY FOR 1/2 HOUR OPERATION AT RATED MAXIMUM CONTINUOUS POWER. (IT IS THE MAXIMUM AMOUNT OF FUEL USED IN WEIGHT AND BALANCE COMPUTATIONS WHEN LOW FUEL MAY ADVERSELY AFFECT THE MOST CRITICAL BALANCE CONDITIONS.)
Term
WHAT IS MEANT BY THE MAXIMUM ZERO FUEL WEIGHT OF AN AIRCRAFT?
Definition
THE MAXIMUM PERMISABLE WEIGHT OF A LOADED AIRCRAFT (PASSENGERS, CREW, CARGO etc.) LESS ITS FUEL.
Term
WHAT IS MEANT BY UNDRAINABLE FUEL?
Definition

AKA: RESIDUAL FUEL.

THE FUEL THAT IS LEFT IN THE TANK, LINES, AND COMPONENTS WHEN THE AIRCRAFT IS PLACED IN LEVEL FLIGHT POSITION AND THE (after)FUEL IS DRAINED AT THE MAIN FUEL STRAINER. 

Term
DESCRIBE THE WAY YOU WOULD FIND THE EMPTY WEIGHT AND EMPTY WEIGHT CENTER OF GRAVITY OF AN AIRPLANE IF THERE ARE NO WEIGHT AND BALANCE RECORDS AVAILABLE.
Definition
  • AIRCRAFT IS WEIGHED
  • COMPUTE EMPTY WEIGHT CENTER OF GRAVITY
  • THESE VALUES ARE RECORDED IN NEW WEIGHT AND BALANCE RECORDS STARTED FOR THAT AIRCRAFT.
Term
WHAT IS MEANT BY PERMANENT BALLAST FOR AND AIRCRAFT?
Definition
WEIGHT THAT IS PERMANENTLY INSTALLED ON AN AIRCRAFT TO BRING THE EMPTY WEIGHT AND CG INTO ALLOWABLE LIMITS.
Term
WHICH HAS THE MORE CRITICAL CENTER OF GRAVITY RAGE, AIRPLANE OR HELICOPTER?
Definition
HELICOPTER.
Term
WHAT EQUIPMENT MUST BE INSTALLED ON A AIRCRAFT WHEN IT IS WEIGHED TO FIND ITS EMPTY WEIGHT CENTER OF GRAVITY?
Definition
ALL EQUIPMENT THAT IS LISTED IN THE AIRCRAFT EQUIPMENT LIST AS "REQUIRED EQUIPMENT"
Term
WHAT IS THE SIGNIFICANCE OF EMPTY WEIGHT CENTER OF GRAVITY RANGE OF AN AIRCRAFT?
Definition
IF THE EMPTY WEIGHT CENTER OF GRAVITY FALLS WITHIN THE EWCG RANGE THEN THE AIRCRAFT CANNOT BE LEGALLY LOADED IN SUCH A WAY THAT ITS LOADED CENTER OF GRAVITY FALLS OUTSIDE OF  THE ALLOWABLE CG RANGE. (NOT ALL AIRCRAFT HAVE A EWCG RANGE)
Term
WHY IS EMPTY WEIGHT CENTER OF GRAVITY RANGE NOT GIVEN IN THE TCDS FOR SOME AIRCRAFT?
Definition
THE EWCG RANGE IS GIVEN ONLY FOR AIRCRAFT THAT CANNOT BE LEGALLY LOADED IN SUCH A WAY THAT THEIR LOADED CG WILL FALL OUTSIDE OF ALLOWABLE LIMITS.
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