Normal GIV Takeoff:
The following procedures are recommended for the Gulfstream IV
and V aircraft for either an Autothrottle engaged or Manual takeoff:
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1) Utilize EPR (Min/Rated or Flex) and 20° flaps for all takeoffs.
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In Santa Ana John Wayne/Orange County (KSNA) for example, you have a "Quiet Flying" procedure which asks to perform a flaps retraction to 0° at 500 feet AGL.