Quote:
Originally Posted by 27AllIn
What's the biggest change in aviation since you stared this thread years ago?
Quote:
Originally Posted by baronworm
I find it hilarious that this is such a valid (great!) question.
It really
is a very good question, and there have been a lot of changes. The biggest? Probably the level of automation, which presents itself in many different areas. I'm not talking about flight automation (the autopilot); believe it or not, that hasn't changed much since the 70s. But there have been great advances in navigation and communications.
When I took my first lesson back in 1977, ADF (automatic direction finder) equipment was a standard instrument in an IFR airplane. This piece of gear had a pointer which would show the direction to an NDB (non-directional beacon) which operated in the KHz spectrum. AM radio stations could also be dialed up and the big ones (like WMAL in the DC area, a 50,000 watt station at 630 KHz) could be tuned and tracked from over 100 miles away.
Planes today still have ADF capability, but it's going the way of the dodo. We don't even practice NDB approaches in the sim anymore and that used to be a rite of passage for instrument students because of the inherent problems that arise from
homing to a station rather than
tracking to a station.
(Here's a link to video about this issue, if you're interested.)
VOR was the gold standard when I started flying, although LORAN was making its way into GA flying. I installed a Marine LORAN in my Grumman Yankee (N6107L, which now apparently lives in Georgia according to
FAA records). This wasn't IFR certified, but it was pretty nice to have.
LORAN lost the battle to the much more accurate GPS, which was only a pipe dream when I started flying. The accuracy of GPS allows for increased flight volume in the approach environment, flying precise arrival procedures, and across the North Atlantic Track System (NATS).
(They use to have several flight tracks across the Atlantic, separated by 60 miles, but now they've cut that separation in half. Of course, GPS is much more accurate than 30 miles, but the separation of tracks has more to do with providing adequate airspace in case of weather avoidance or emergencies requiring a departure from the track. I'm getting off on a tangent...)
TCAS only came to the cockpit in the early 90s and, oddly, it was initially resisted my some pilots for reasons I can't explain. Now, if I get a plane with the TCAS deferred, I consider it a very real reduction in the safety level of the flight. It's really great in the approach environment, where aircraft separation is reduced and volume of aircraft increases. It's a great tool for providing in-trail separation when cleared for a visual approach.
VHF communications haven't changed at all since I started flying, but now we have additional tools in the comm department. Perhaps foremost among these is
CPDCL, Controller-Pilot Data Link Communications, which provides a means to obtain clearances via the ACARS without using voice communications. CPDLC first appeared in overwater flights, on the NATS (trans-Atlantic) and WATRS (offshore U.S. and Caribbean) routes, when out of reach of VHF communications. Now, we use it a little bit in domestic flying. On the 737, I receive all of my initial route clearances by logging into CPDLC and the clearance is sent directly to us.
We also have SATCOM on all of our international planes, and that makes it possible to make a phone call to anywhere in the world from the airplane. On my TOE (Trans Oceanic Experience), when I first started on the 767, the check airman let me phone home from somewhere near Iceland at 38,000'. "Can you hear me now?"
One advance that I'm really enjoying is the HUD on the 737, which is only on the Captain's side. I'm not sure if HUDs were around in 1977, but if they were, it was only on military planes. What a great device. It makes it possible to hand fly the plane to a landing in visibility of less than 1/8 mile and ceilings of 50'.
Lastly, the automation with respect to charts is fairly recent and seems long overdue to this humble airman. Just a few years ago, it was common to walk into the pilot lounge before a flight and see pilots all over the place updating their paper airport charts with the bi-weekly update we received from Jeppesen. This was no small task, especially when I was on the 767 and had charts covering
literally the entire world (using the classic meaning of the word). An update would come in a plain manila envelope and contain anywhere from a dozen to over a hundred gossamer-thin paper charts (approx 5"x8"). Great care had to be taken to follow the replacement guide that came with every update and replace an old chart, sometimes simply delete old charts, and sometimes add new charts. Easy to screw it up and that's why we always cross-checked the date of each chart when using them for a briefing in the cockpit.
We now have iPads which contain all of the charts and company manuals, along with built-in update capability so that we are always current. It makes everything so much nicer, and now I don't have to carry a flight bag with 40 lbs of airport and navigation charts, as well as company manuals. Next time you fly, take note of the fact that not many pilots still lug the classic flight kit along. Now, most guys have their roll-aboard along with a smaller bag for their iPad, headset and other incidentals.
So a lot has changed, but basic aerodynamics remain the same: pull back, houses get smaller; push forward, houses get bigger.