Empty Weight

Report
Overview of Chapter 6
Douglas S. Cairns
Lysle A. Wood Distinguished
Professor
Basic Forces
Lift
Drag
Trim
Thrust
Weight
2-7
Actual Basic Forces
(ala Doug Chapman, Montana Aircraft)
Dreams
FAA
$
Reality
2-8
What’s in Weight?Lift
Drag
Payload
Fuel
Paying
Passengers and
Cargo
Reserves
Operating items
Airplane
Operating
Empty
Weight (OEW)
Systems
Navigate, control and support life
Propulsion
Generate force to move airplane
Landing Gear
Support airplane on the ground
Body
Wing & Tails
2-9
Food, Supplies
Enclose the payload
Provide lift
Trim
Thrust
Weight
The “Model” for CP-1 Propeller
Examples in Chapter 6
Cessna 182 Skylane, second most popular general aviation airplane of all
time
(first is Cessna 172 Skyhawk)
Typical C182 Performance Data
•
•
•
•
•
•
•
•
•
•
•
Horsepower: 230
Gross Weight: 2800 lbs
Top Speed: 148 kts
Empty Weight: 1620 lbs
Cruise Speed: 141 kts
Fuel Capacity: 65.00 gal
Stall Speed (dirty): 48 kts
Range: 550 nm
Takeoff Ground Roll: 625 ft Over 50 ft obstacle: 1205 ft
Landing Ground Roll 590 ft Over 50 ft obstacle: 1350 ft
Rate Of Climb: 980 fpm Ceiling: 18,900 ft
Dr. Cairns’ 1957 182A
“Straight Tail 182”
C182A Performance
•
•
•
•
•
•
•
•
•
•
•
Horsepower: 230
Gross Weight: 2650 lbs
Top Speed: 148 kts
Empty Weight: 1620 lbs
Cruise Speed: 141 kts
Fuel Capacity: 55.00 gal
Stall Speed (dirty): 48 kts
Range: 450 nm
Takeoff Ground Roll: 620 ft Over 50 ft obstacle: 1080 ft
Landing Ground Roll 610 ft Over 50 ft obstacle: 1310 ft
Rate Of Climb: 1030 fpm Ceiling: 19,800 ft
The “Model” for CJ-1 Jet Examples
in Chapter 6
Typical CJ3 Performance Data
Citation CJ3
• Manufacturer: Cessna
Class: Mid Sized
Seating: 6
Lavatory: enclosed
Cabin Dimensions: 4.80 x 4.80 x 15.20 (H-W-L)
Storage Capacity: 65 cu ft
Max Payload: 5,370 lb
Take Off Distance: 3180ft
Climb Rate: 4478 fpm
Cruise Speed: 417 mph
Maximum Range: 1875 nm
Cruise Altitude: 45000 ft
Typical Load Factors
• Acrobatic , -10 to 12 (only a few pilots capable of
performing with these loads)
• Fighter Aircraft, -6 to 8
• General Aviation, Utility, -1.5 to 4.4
• General Aviation, Standard, -1.5 to 3.8
• Commercial Transport, -1.5 to 2.5
• Heavy Transport, Bombers, -1.0 to 2.0
• Helicopters (most not capable of negative load
factors)
• UAVs (since unmanned, can have much higher load
factors than manned)

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