Fa2004 16.33312-8 Standard approach: assume turbulence field fixed(frozen)in space aircraft is just flying into it Then can relate turbulence spatial frequency 2 to the temporal frequency w that the aircraft would feel Used to model how the aircraft will behave in bumpy air Atmospheric gust ofi Vertical gust sec 300 ft on radio Touchdown Figure 2: Wind gust examplesFall 2004 16.333 12–8 – Standard approach: assume turbulence field fixed (frozen) in space ⇒ aircraft is just flying into it. 3 Then can relate turbulence spatial frequency Ω to the temporal frequency ω that the aircraft would feel ω Ω ≡ ω = ΩU0 U0 ⇒ – Used to model how the aircraft will behave in bumpy air. profiles 10 ft/sec altimeter 10 ft/sec Longitudinal gust Atmospheric gust Touchdown 10 ft/sec 300 ft on radio 5 sec Vertical gust Lateral gust Figure 2: Wind gust examples