For any questions or suggestions about routes or flights etc.
Posts: 1068
Joined: Sat Mar 03, 2018 5:29 am
Has thanked: 309 times
Been thanked: 393 times

Re: Airports

Post by Plog »

One issue with the "tractor to the runway" idea is that it would only work or produce a significant improvement in fuel burn/reduction in emissions at certain airports and in certain circumstances.

Most commercial jet engines usually have mandatory a warm up time, typically of the order of three to five minutes, during which it's prohibited to apply "take-off" power. That's to prevent the thermal shock the engine components would get if you just started the thing up and then a few seconds later pushed it up to a high power setting. There's also often a minimum allowable oil temperature limitation for the same reason and in very cold weather it can also take some time to heat that side of the system up....end result is even if being pulled by a tug you'd need the engines running well before you actually got to the runway.

There are some other issue with the idea - ATC would lose the option of changing the order of aircraft departing if most of them are hooked up to a tug with cold engines- but OTOH though I could see the tug idea working at the likes of JFK where > one hour taxiing out was the norm during evening rush hour and on a bad day it could be nearer two...

User avatar
Posts: 384
Joined: Tue Nov 05, 2019 5:32 pm
Location: 23
Has thanked: 59 times
Been thanked: 136 times

Re: Airports

Post by Polarengineer »

Bringing up the subject of taxiing aircraft. It looks like someone was listening to this forum ... bad6021a2b
Absolute-ly..I have become comfortably numb (with ice it's nice)

User avatar
Posts: 5513
Joined: Fri Mar 02, 2018 12:55 am
Has thanked: 554 times
Been thanked: 555 times

Re: Airports

Post by Nifty »

Omg! I must be turning French.
Before Les Pujols was modernised about twenty years ago it contained one of the most memorable restaurants that I have ever eaten at. Going there felt bit like one had been transported back to the mid 1930s. The Head Waiter or whatever he was used to inspect and drill his staff as if practicing for a military parade.

Post Reply