What is the Evergreen Supertanker s drop speed over the fire?
At no time in flight will the Evergreen Supertanker operate outside the Boeing 747 s normal operating parameters. The drop speed is approximately 140 knots. This provides a 30% cushion over the Boeing 747 s stall speed. During a retardant drop, the Evergreen Supertanker is configured as if it were approaching for a landing and is well within all the typical speed parameters that a Boeing 747 would normally be in when approaching an airport for a landing.
