TBTC Testing Nov 26, 2010 21:15:16 GMT
Post by d7666 on Nov 26, 2010 21:15:16 GMT
Nov 23, 2010 21:22:50 GMT @sw206 said:I heard that the 96 stock run in 'full performance' mode under TBTC as well. Does anyone know exactly what the difference is? Is it top speed increase or what? They are pretty quick off the mark in normal mode, so other than ATO 'efficiencies' what else changes?
I read somewhere the 95 stock on the Northern is only running at 60% power too - is this also going to have a performance increase when TBTC finally gets installed on the Northern too? I don't think the Jubilee track 'line speed' will increase, just perhaps the ability to get trains to a higher speed more quickly with the 'performance' increase.
Indeed thats more or less it.
Traction packs are current limited. Once TBTC is in and fully working, there is a post TBTC stage that uncaps them. Cutting out a lot of maths and physics, more current = higher acceleration, and corresponding uplift in regen braking for deceleration.
It was called stage J6 at one time, following J5 TBTC Dollis Hill - Stanmore; I don't know if the terms still apply. I did once see a whole list of proposed dates and proposed WTT numbers for all this but JNUP has drifted so far it would be all out of date anyway.
It is important to remember that is is not just TBTC alone that reduces headway to increase TPH, TBTC permits traction and braking capability beyond clockwork signalling.
Similar proposals apply to Northern line.