Thanks for all your responces i really appreciate it.

The only thing i wouldnt understand now is why the London Underground would
actually BUILT/ORDER 3 trains just so people can choose "color" and "design"
and after they choose one then they got to chuck away all the set !! it isnt
very financially-wyse is it ?

Plus that whenever new vehicles are involved either busses or trains i thought
the compoany takes decisions themselves and instead of building prototypes they
just choose one design order 100 makes of it then they release it

Thats what happened anyway for trains in waterloo and northern, there were no
prototypes.

thanks a lot

Soniakostas wrote:
Thanks for all your responces i really appreciate it.

The only thing i wouldnt understand now is why the London Underground
would actually BUILT/ORDER 3 trains just so people can choose "color"
and "design" and after they choose one then they got to chuck away
all the set !! it isnt very financially-wyse is it ?

Plus that whenever new vehicles are involved either busses or trains
i thought the compoany takes decisions themselves and instead of
building prototypes they just choose one design order 100 makes of it
then they release it

Thats what happened anyway for trains in waterloo and northern, there
were no prototypes.

thanks a lot

AIUI there were also new on train equipment systems installed that they
wanted to try out in service. It wasn't simply for passenger/customer
feedback.

Colin Rosenstiel wrote:
In article ,
(Brimstone) wrote:

Soniakostas wrote:
Thanks for all your responces i really appreciate it.

The only thing i wouldnt understand now is why the London
Underground would actually BUILT/ORDER 3 trains just so people can
choose "color" and "design" and after they choose one then they got
to chuck away all the set !! it isnt very financially-wyse is it ?

Plus that whenever new vehicles are involved either busses or trains
i thought the compoany takes decisions themselves and instead of
building prototypes they just choose one design order 100 makes of
it then they release it

Thats what happened anyway for trains in waterloo and northern,
there were no prototypes.

thanks a lot

AIUI there were also new on train equipment systems installed that
they wanted to try out in service. It wasn't simply for
passenger/customer feedback.

Weren't the 1986 prototypes also the first tube trains to use solid
state electronics control systems? A big technological step forward
requiring non-trivial testing on the real system.

Most probably, although I think the one or both of the Experimental Tube
Train (ETT, 73 stock based) units had electronic control. The previous
stock introduced were the 83s.