GGTharos Posted August 23, 2014 Share Posted August 23, 2014 Higher altitude should have more problems. [sIGPIC][/sIGPIC] Reminder: SAM = Speed Bump :D I used to play flight sims like you, but then I took a slammer to the knee - Yoda Link to comment Share on other sites More sharing options...
effte Posted August 24, 2014 Share Posted August 24, 2014 Still in the dark as to why it couldn't be done. Above Va, you're going to overstress the airframe before the stall. Enough above Va, and things are going to break, preventing you from reaching the stall. That's universal for all aircraft though. Elevator deflection is pretty much an AoA selector, so what limits elevator deflection at speed in the F-15? Why isn't the limiter active at lower airspeeds? Why will it let you bend the airframe, but prevent a stall? Or do you, by "can't", refer to excessive control forces alone? What constitutes 'high speed'? >M.3? >Va? >M1.0? ----- Introduction to UTM/MGRS - Trying to get your head around what trim is, how it works and how to use it? - DCS helos vs the real world. Link to comment Share on other sites More sharing options...
GGTharos Posted August 24, 2014 Share Posted August 24, 2014 There is no limiter. High speed is transonic. [sIGPIC][/sIGPIC] Reminder: SAM = Speed Bump :D I used to play flight sims like you, but then I took a slammer to the knee - Yoda Link to comment Share on other sites More sharing options...
effte Posted August 24, 2014 Share Posted August 24, 2014 So there's a loss of control authority in the transonic region, preventing the pilot from increasing AoA to the stall? Or are you talking about the normal supersonic stability increase reducing control authority to that point? Which leads to the interesting question of what control authority remains. A reference or two would be of interest. ----- Introduction to UTM/MGRS - Trying to get your head around what trim is, how it works and how to use it? - DCS helos vs the real world. Link to comment Share on other sites More sharing options...
GGTharos Posted August 25, 2014 Share Posted August 25, 2014 Thinking about it again, the PRC (Pitch Ratio Changer) will have changed the pitch ratio at high speeds so that it is simply not possible to deflect the elevators enough to do such a thing (but you still have enough authority to bend the aircraft - like I said, there's no limiter). Perhaps if the PRC was damaged/off and had shifted to 1.0, you could deflect the elevators enough to stall the aircraft at high speed. I don't know what would come first: The airframe disintegrating or the stall. So there's a loss of control authority in the transonic region, preventing the pilot from increasing AoA to the stall? Or are you talking about the normal supersonic stability increase reducing control authority to that point? Which leads to the interesting question of what control authority remains. A reference or two would be of interest. [sIGPIC][/sIGPIC] Reminder: SAM = Speed Bump :D I used to play flight sims like you, but then I took a slammer to the knee - Yoda Link to comment Share on other sites More sharing options...
Rainmaker Posted August 26, 2014 Share Posted August 26, 2014 There is no limiter. High speed is transonic. Depends on what you mean by "limiter". The system itself is not "full" authority meaning the aircraft will only allow certain inputs based on what it knows. Then there are certain limiters that are mechanical stops, such as the rudder limiter, for instance. Link to comment Share on other sites More sharing options...
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