For testing I set up a mission in full mission builder, for 1000ft it was set up to spawn at 1500ft and 490kmh as soon as it spawned engage autopilot, wait till it settles down and gets up to max speed then disengage autopilot, still flying level adjust radiator and revs then shallow dive to 1000ft hold it level for 20 seconds while any speed from diving has bled away then press pause and take a reading of the speed.
~S~ 56RAF_Rumba
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