Slinker From United States of America, joined Feb 2006, 16 posts, RR: 0 Posted (7 years 9 months 1 week 3 days 6 hours ago) and read 12206 times:
I've always wondered why the levers for landing gear in commercial airliners usually have a wheel on the end of them (instead of just being a toggle switch or something like that). Anyone care to enlighten me?
Sinlock From United States of America, joined Dec 2000, 1560 posts, RR: 3 Reply 4, posted (7 years 9 months 1 week 3 days 2 hours ago) and read 12097 times:
It's a carry over from the day when aircraft had more levers in the cockpit.
It was standard and in many cases an Federal Aviation Regulation that different controls ended with a different shape handle so during reduced visibility such as darkness or smoke that the pilots could determine the type of control by feel. Different manufactures used different shapes and color for Throttle, Prop Pitch, Mixture, Turbo/Supercharger. The same thing is done for Lights, Flaps and Trim.
EssentialPowr From United States of America, joined Sep 2000, 1820 posts, RR: 2 Reply 7, posted (7 years 9 months 1 week 2 days 16 hours ago) and read 11909 times:
We covered some of this quite a few years ago...The 1950s really started some human factors input in to aircraft design. Boeing, for example, would even make switch position (off/on) on the overhead of the 727 airline specific...Later, standards started to develop...to include the Boeing philosophy of electrical on the left over head, fuel left center, lights above the glareshield, hydraulics/bleeds/pneumatics over the FO...
Buzz From United States of America, joined Nov 1999, 697 posts, RR: 23 Reply 9, posted (7 years 9 months 1 week 2 days 12 hours ago) and read 11836 times:
Hi Slinker, Buzz here. Besides what the other guys have said about being a good human-factors idea, it's required in FAR 25.
I forget the sub part, but there's a page that shows what shape each control is supposed to be: Landing Gear, Throttle, Prop, Mixture.
The DC-3 was certified under CAR 3 (or was it CAR 4?) and it's been grandfathered so you don't have to replace the knobs. They're all round. But they come in different colors to help you grab the right one.
SATX From United States of America, joined Apr 2005, 2840 posts, RR: 8 Reply 20, posted (7 years 9 months 1 week 1 day 4 hours ago) and read 11512 times:
Quoting David L (Reply 19): Oh well, I guess there's always the retractable ballpoint pen.
I think someone needs to design an actual inflatable spinning wheel for the end. You could spin it and let out the air and then move the flaccid tube around and then pump it up with air again and go back to spinning it.
Open Season on Consumer Protections is Just Around the Corner...
His colleagues up front didn't appear to disagree with him
Which is why I refer to our pilots as the "lumps in the right seat or left seat". Our f/o does not care for the characterization, but as "the boulder" (the unmovable source) I have the last say.
Quoting David L (Reply 19): Quoting AmericanAirFan (Reply 18):
Nope it's just part of the lever at the end
Oh well, I guess there's always the retractable ballpoint pen.
On one of our planes we had a switch which was to NOTHING. We refer to it as the "diddle" switch. It's sole function is to allow the "lumps" to diddle with it as opposed to a real switch, thus not breaking something of importance when they are bored.
IFACN From Italy, joined Nov 2005, 153 posts, RR: 0 Reply 22, posted (7 years 9 months 1 week 1 day ago) and read 11463 times:
Quoting Amtrosie (Reply 21): we had a switch which was to NOTHING. It's sole function is to allow the "lumps" to diddle with it as opposed to a real switch, thus not breaking something of importance when they are bored.
As per the current regulations, can it be operated under 10'000 ft or boredom is banned in a 'sterile cockpit' environment?
By the way, let me know which airline you work for so I'll book my future flight with someone else. See, I'd be very disappointed if the last things I hear in my life are "yawn - click click - yawn - click click - crash!"
CitationJet From United States of America, joined Mar 2003, 2311 posts, RR: 3 Reply 23, posted (7 years 9 months 1 week 23 hours ago) and read 11454 times:
I have heard of a Gulfstream operator that added a buzzer to the cockpit instrument panel that goes off every so many minutes, and the pilot has to turn it off. The goal is to keep the crew awake and alert.
EssentialPowr From United States of America, joined Sep 2000, 1820 posts, RR: 2 Reply 24, posted (7 years 9 months 1 week 23 hours ago) and read 11446 times:
Quoting CitationJet (Reply 23): I have heard of a Gulfstream operator that added a buzzer to the cockpit instrument panel that goes off every so many minutes, and the pilot has to turn it off. The goal is to keep the crew awake and alert.
I've know most modern locomotives have a deadman switch, but never heard of a Gulfstream. Usually there's enough interaction with ATC to preclude that need.
25 TEBguy: I take it this was a switch from something that was deactivated? what had it been for?
26 David L: I like that... flicking the switch to and fro while thinking "I'm flying the plane!".
27 Amtrosie: Not sure what its original function was, but it sure prevented them from breaking something that was needed. Sterile cockpit rules definately do appl
28 HAWK21M: Symbolism......Resembles the Control used.Noticed the Flap lever at least on B737 & B757. regds MEL
29 StealthZ: Perfect for the multi modal transport conglomerate, cross qualify your EMD SD70M & GE AC4400 engineers to fly the G-V as well..!! Hope the Gulfstream
30 ThirtyEcho: Recip pilots have some real advantages, here. You can irritate others by constatantly fooling with mixture, synchrophaser, fuel flow, prop pitch, CHT,
31 BAe146QT: Such things are not always harmless or benign however; I refer you to the following story; http://www.livingstonmontana.com/access/dan/191magicswitch
32 DH106: Just out of interest - how does that red strap attached to the overhead panel in the DC-4 prevent gear retraction? Doesn't look like the lower end is