1 / 13

LSA FAA definition

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

kelly-davidson
Télécharger la présentation

LSA FAA definition

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LSA FAA definition • Max gross takeoff weight = 1320 lbs • Max stall speed = 45 knots • Maximum speed in level flight = 120 knots

  2. 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 • Flight conditions • Design speeds

  3. 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

  4. Flight envelope VA VC,max VD Vs

  5. Total Loads • Level flight 1320 lbs • Design Limit load = 5280 lbs • Ultimate load = 7920 lbs (for 3 seconds)

  6. XFLR5 • Simulations • Various A.O.A. and Reynolds numbers • Wing panels • Data (spreadsheet) • Aerodynamic coefficients • Lift, drag, and moment forces

  7. XFLR5

  8. XFLR5

  9. XFLR5

  10. Distribution

  11. Shear and bending • Integrate ultimate load equations • From 0(root) to 8ft (airfoil switch) • F = -5.2139x + 318.37 • From 8ft to tip (15ft) • F = -3.255x2 +54.497x + 42.791

  12. Torsion/control loads • 75% positive maneuvering load, plus torsion from max aileron displacement • Gust loads at VF with flaps extended (7.5 m/s)

  13. Gusts • Symmetric vertical gusts (up and down) • 15 m/s at VC • 7.5 m/s at VD

More Related