Overview of Experiment Flight Conditions M=0.56.25000feet (Subsonic condition M=0.86.36000feef (Transonic condition) Nose-To-Tail (N2T) Distances 20,55,110and190feet Nomenclature X-direction(longitudinal) Y-direction(lateral) Z-direction(vertical) The subsonic flight condition(M=0.56, h=25000 feet) was selected to match pre-existing data from vortex-effect prediction codes. These codes needed to be validated to determine their utility ure applications of AFF. Since a possible future application of A FF is for transport airplane, flight data were also acquired at M=0.86 and h =36000 feet. This transonic flight condition is representative for that class of vehicle The vortex effects were also mapped at different longitudinal distances behind the leader airplane. These Nose-To-Tail (N2T) distances were monitored by the control room and maintained by the pilots through periodic radio calls. Only the results from the subsonic condition, 55 N2T will be presented here. 55 is equal to the length of the FlA-18. The reference axis system was as shown above. It should be noted that although Z is positive down, this presentation will refer to positions above the lead airplane(or high)as positive and positio below the lead airplane(or low)as negative BELT Autonomous Formation Flight Page 1Overview of Experiment • Flight Conditions – M = 0.56, 25000 feet (Subsonic condition) – M = 0.86, 36000 feet (Transonic condition) • Nose-To-Tail (N2T) Distances – 20, 55, 110 and 190 feet • Nomenclature – X-direction (longitudinal) – Y-direction (lateral) – Z-direction (vertical) The subsonic flight condition (M=0.56, h=25000 feet) was selected to match pre-existing data from vortex-effect prediction codes. These codes needed to be validated to determine their utility on future applications of AFF. Since a possible future application of AFF is for transport airplane, flight data were also acquired at M=0.86 and h =36000 feet. This transonic flight condition is representative for that class of vehicle. The vortex effects were also mapped at different longitudinal distances behind the leader airplane. These Nose-To-Tail (N2T) distances were monitored by the control room and maintained by the pilots through periodic radio calls. Only the results from the subsonic condition, 55’ N2T will be presented here. 55’ is equal to the length of the F/A-18. The reference axis system was as shown above. It should be noted that although Z is positive down, this presentation will refer to positions above the lead airplane (or high) as positive and positions below the lead airplane (or low) as negative. Page 1 Autonomous Formation Flight Program NAS4-00041 TO-104