Thread: Joeaksa
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FOG FOG is online now
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Join Date: Apr 2006
Location: DFW
Posts: 557
Air,

I have a passing familiarity with aero for nasal radiators and the equations.

We’re talking different things. What are the standards? As an example the turbulent airspeed for a KC-130 (since I have access to both NATOPS and performance manuals) is below Vp. Part of the certification standards for .mil acft as explained includes full control movement with reversal at or below Vp. If the acft doesn’t meet the standard then either fix it or address it appropriate notes, warnings, and cautions. I may be wrong on the acceptance/testing standards but I have some familiarity with accepting a couple of fixed wing acft. If you want to talk to rotary or Osprey then I’m not well versed.

It is interesting what the FMF and fleet aviators figure out by studying the performance manuals added to knowledge and experience. Wonder how the unrecoverable (as defined by the manufacturer and TPS) F/A-18 became recoverable? Fleet aviators went out and safely did it repeatedly then they instrumented it. KC-130 take off and landing data is still as specified and use the numbers for the nuggets. I can go on.

Part of the reason that the above happens is the test folks have to go with parameters that are specified by someone else. Service and cruise ceilings along with max endurance numbers are defined with flaps up though the fleet beats these numbers by the simple expedient of dropping flaps to 10-12 percent and reducing overall drag.

Back to the AA example. The other transport that warns about full rubber reversals is the C-130 series. The warning has to rudder fin stall that can lead to other very bad things if not properly recovered from. As stated here and talking to a couple of Airbus instructors the admonishment is only after the mishap and no one will answer the question they have on certification.

I don’t take you as being a jerk but as ill informed civilian aviator who views the military the publicly presented knuckle dragging neanderthal who may have been a NASA engineer advanced degrees in various “hard” disciplines” etc. combined with real world experience.

S/F, FOG
Old 12-10-2006, 09:31 AM
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