Adversity Spurs Innovation

It takes a crisis to start the little gray cells working. When fuel was 25 cents a gallon, we taxied airplanes around with abandon. Airport and airways congestion meant long lines of jets waiting their turn to take off, trails of heat shimmering behind...


It takes a crisis to start the little gray cells working. When fuel was 25 cents a gallon, we taxied airplanes around with abandon. Airport and airways congestion meant long lines of jets waiting their turn to take off, trails of heat shimmering behind each one and haze forming into dense clouds of smog. One of the sights at JFK was the occasion for ultimate horror — a change of runways. This could be caused by a radical shift in the winds or by changes in air traffic, mandating a different direction for traffic flow. You would see the jets form up into a long line, much like the elephants at Barnum & Bailey Circus, lacking only a trunk to grab the tail of the aircraft in front. Thirty or more big jets were in a row. They would trundle the long miles to the new hold areas, and one could imagine the cursing from passengers and especially the crews.

That condition became somewhat alleviated by gate holds. Why start four thirsty engines, taxi out and hold, creeping up yard-by-yard as the successive No. 1s roared down the runway until finally your turn came? The problem, though, was that there was not an infinite supply of gates. A departure not departing meant an arrival could not arrive. So often arrivals held ... and held and held. The frustration for the passengers was that they had indeed arrived but could not disembark, and if there was a connection to be made ... well. Meanwhile, too, there were still big engines running and waiting for the chance to move the aircraft that last few hundred yards into the gate. Snow or thunderstorms only aggravated the problem. The feds regulated this waiting, threatening huge fines against the airline who dared hold their passengers captive for more than a specified number of hours. Good thought, but the airlines instead began canceling flights rather than risk a long ground hold, and, “We are sorry, but there are no seats available until next Tuesday,” for the stranded traveler.

 

Aircraft Towing a Solution?

Well, no answers so far for the problems of traffic density. The promise of a new and improved air traffic control system has been dangled for years, always coming soon but not just now. But we are once again re-examining an old idea. Why have aircraft taxied under the impulse of the wasteful and thirsty power of their own turbine engines? Why not tow them out to the runway, only starting their main engines minutes before their takeoff? A thrifty high-efficiency diesel would certainly burn a lot less fuel than the aircraft’s own main engines in traversing the miles from terminal to gate. And we could meet inbounds in the same way, towing them from runway to gate.

It certainly is more practical than it once was, where a small crew was required to hook up a towbar to the nosegear and attach the tow tractor. Now, towbarless tugs have scoops for nose gears, or grippers and grabbers that can couple the tow vehicle to the aircraft quickly and easily. Of course, there are some practical problems that must be faced. The need for dedicated roads for tow vehicles to get to and from runways, and the potential for inadvertent runway incursions by tow vehicles come to mind immediately. GPS navigation would have to be fitted into the tug. It is one thing to taxi an aircraft from the cockpit 15 feet or more up, and quite another to be four feet off the ground inside a tug and trying to find your way at night in a fog. I have been out there under emergency conditions trying to find my way around, and it is frightening. Training for the ground crew in moving and navigating around active runways and taxiways will be paramount, as there is a huge potential for the already-mentioned runway incursions. Then there will be the added burden on the ground controllers, already maxed out in handling the aircraft flow and now having to handle the additional burden of lumbering tugs, intruding where only aircraft dared go.

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