IFM applications to complex store configurations

Cenko, A.; Metzer, J.; Phillips, KY Post Eldon

doi:10.2514/6.1990-275

Cited by 2 publications

(1 citation statement)

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“…Lacking this, it has been demonstrated that unexpected results may occur during the flight test. 2 Ground test techniques that use wind tunnels to examine traditional store separation characteristics are well established and accepted. However, UAVs present possible complexities that should be addressed when developing a wind-tunnel test plan.…”

Section: Introductionmentioning

confidence: 99%

Wind-tunnel test techniques for unmanned aerial vehicle separation investigations

Moyer

Talbot

1994

Journal of Aircraft

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Wind-tunnel tests of an unmanned aerial vehicle (UAV) separating from two fighter aircraft have been conducted. UAVs present different concerns in separation testing than do conventional stores due to the presence of large lifting surfaces, physical size, and control surface effects. The planning and results of these recent investigations give several new results with respect to the separation testing of complex configurations. Separation trajectory simulations using experimental data have been used to demonstrate the unique requirements of UAV separation testing. The simulation demonstrates that simplifications in the aerodynamic grid proximity testing matrix can be made without sacrificing simulation accuracy. Results indicate that simplification in ejector modeling used with simple stores should not be applied to UAVs. The simulations also indicated that it is important to properly model the aircraft control surface effects on the UAV. NomenclatureMy.-freestream Mach number X, 7, Z = store longitudinal, lateral, and vertical displacements in the aircraft axis system (aligned with the aircraft longitudinal axis, origin is at the store center of gravity); positive forward, right and down, ft X P , y/>, Z P = store longitudinal, lateral, and vertical displacements in the pylon axis system (aligned with the store longitudinal axis, origin is at the store center of gravity); positive forward, right and down, ft a = aircraft angle of attack, deg 0 = store pitch angle, positive nose up as seen by the pilot, deg 0 = store roll angle, positive clockwise rotation looking upstream, deĝ = store yaw angle, positive nose right as seen by the pilot, deg

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Section: Introductionmentioning

confidence: 99%