The International Simutrans Forum

Development => Extension Requests => Topic started by: Tazze on October 01, 2013, 05:48:49 AM

Title: Power-back or pushback
Post by: Tazze on October 01, 2013, 05:48:49 AM
I found the deferent motion of airplane from the real in simutrans.
When the airplane leave from stops,almost of them are backward to runway.
According to Wikipedia ,many aircraft are capable of moving themselves backwards on the ground.(it called as powerback) And it often used in Europe.
IIRC,In japan, almost aircraft must pushback by a vehicle ,because of old machine imported from other country.
That is to say,we have never seen aircraft turning  on the stops.

Title: Re: Power-back or pushback
Post by: prissi on October 02, 2013, 11:17:34 AM
I never have seen an airplane pushing itself back with its jets. I highly doubt it would be allowed (at least in central europe) apart from some turboprops. Furthermore, most reverse trust does not generate actually much trust backwards, it rather generates a huge sideblow which increase resistance considerably.

The new A320 can have a system for taxiing using electric power (and hence also pushback). Although without backward sight, I think this is rather dangerous.

Although used by other airlines, Eastern Air Lines is generally credited as the first to do powerbacks with specific approved instructions and procedures (circa 1980). It started with their 727s and was extended to DC-9s. Other airlines used the procedure for MD-80s, Fokker 100s, and even Boeing 717s. The 727-200 depicted here has clamshell thrust reversers with deflector doors, and the procedure was also used with 727s which were retrofitted with cascade style thrust reversers. The powerback procedure was generally banned for use with airliners having wing mounted engines. The EAL (non-advanced) model 727-200 was powered by Pratt and Whitney JT8D-7 engines.

After reading this: None of these oldtimers fly with any eurpean airline, so there are not even planes capable of doing this in europe (apart from turboprops obviously).
Title: Re: Power-back or pushback
Post by: wlindley on October 02, 2013, 01:43:07 PM
The only place I have seen "pushbacks" done in the USA was Love Field in Dallas, Texas, and even there, "Tugs" are used now.  One could indeed imagine an inner-simutrans which covers the Tugs, the baggage-haulers, and people-movers *inside* an airport...
Title: Re: Power-back or pushback
Post by: Tazze on October 02, 2013, 03:36:25 PM
Oops! When  I read my post again, I found big miss wrghting; it is not backward  to runway  but  to taxing way .

This Japanese airport sumilation game is usuful to understand the airport system in japan airport.