# LSA FAA definition - PowerPoint PPT Presentation

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LSA FAA definition. Max gross takeoff weight = 1320 lbs Max stall speed = 45 knots Maximum speed in level flight = 120 knots. ASTM F 2245-07 guidelines. Limit load factors Ultimate load factor of safety = 1.5 Special ultimate S.F.s for hinges, bearings, pins, control components

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LSA FAA definition

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### LSA FAA definition

• Max gross takeoff weight = 1320 lbs

• Max stall speed = 45 knots

• Maximum speed in level flight = 120 knots

### ASTM F 2245-07 guidelines

• Ultimate load factor of safety = 1.5

• Special ultimate S.F.s for hinges, bearings, pins, control components

• Flight conditions

• Design speeds

### Design speeds

• 45 knots = Stall speed (LSA)

• 99.6 knots= Minimum maneuvering Speed

• 108 knots = Minimum cruise

• 120 knots = Maximum cruise (LSA)

• 160 knots = Dive speed

### Flight envelope

VA VC,max VD

Vs

• Level flight 1320 lbs

• Design Limit load = 5280 lbs

• Ultimate load = 7920 lbs (for 3 seconds)

### XFLR5

• Simulations

• Various A.O.A. and Reynolds numbers

• Wing panels

• Aerodynamic coefficients

• Lift, drag, and moment forces

### Shear and bending

• From 0(root) to 8ft (airfoil switch)

• F = -5.2139x + 318.37

• From 8ft to tip (15ft)

• F = -3.255x2 +54.497x + 42.791