Innis Cunningham wrote: > Hi Josh > > Josh Babcock writes >> Innis Cunningham wrote: >>> >>> Josh Babcock writes >>>> Innis Cunningham wrote: >>>>> Hi All >>>>> >>>>> >>>>> Josh Babcock writes >>>>>> Jeremy Santizo wrote: >>>>>>> can anyone tell me what's pitot heat and if that reallly work on >>>> planes? >>>>>> Where can I find the procedures for programing the cessna 172's NAV >>>> panel >>>>>> (in the 2D panel model)? >>>>>> Pitot heat prevents pitot tube icing in icing conditions. If that >> were >>>>>> to happen, the air speed indicator would cease functioning. >>>>> More serious than cease to function.It starts to work as an >>>> altimetre.I.E >>>>> the higher you >>>>> fly the faster you appear to go.Resulted in the loss of a 727 some >> years >>>>> back.Also resulted >>>>> in the loss of a commercial jet liner,cant remember what type,when the >>>>> static ports were >>>>> left taped over after aircraft cleaning.Dont know if the loss of pitot >>>> or >>>>> static is modelled >>>>> in FG >>>>> >>>> Ah, another reason to have an AoA readout. Those carrier pilots know >>>> where it's at. >>> Well in the case of the 727 they had both the stall warning and the >>> overspeed >>> warning going off at the same time so what do you beleave.That the stall >>> warning >>> is correct and lower the nose and risk ripping the aircraft apart with >>> overspeed or >>> that the ASI is correct and continue to pull the nose up making a worse >>> situation >>> untill, in a tail engined aircraft,you enter what is called a super >> stall >>> for which the >>> pilot has only one recourse and that is to stick his head between his >> legs >>> and kiss >>> his a---- goodbye.In this case the pilots choose the later which cost >> them >>> there >>> lives. >>> >>> Cheers >>> Innis >>> >> I would tend to believe the AoA meter if it matched what my gyro and >> eyeballs were telling me. It's hard to get your airspeed that way >> though. Is the superstall that you mention a case of flying at full >> power on the back side of the lift curve? I have heard stories of GA >> planes stuck in that position. > > No it occures when the AoA becomes so great as that the wings block > airflow over the elevators hence no pitch control so the aircraft falls > backwards out of the sky.So serious is the problem that most commercial > tail engined aircraft have a stick pusher that lowers the nose when the > aircraft is entering a dangerous attitude. > With the 727 they actually had the throttles at idle.You would think they > would have tweeked that something was wrong that the aircraft was still > increasing speed even though they had the throttles at idle and the aircraft > in a climb. > Task saturation. I know the problem you are talking about. It's why I'm not a fan of T tails.
Josh ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Flightgear-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-users
