On 6 Jul, 11:35, Adrian wrote:
Boltar ) gurgled happily, sounding much like they
were saying :

shrug
How often do bus engines require full power? Not very.
Agreed but when they do need it they really need it. The steep hills
around mill hill, highgate , hampstead and southgate spring to mind. A
hybrid bus with an exhausted battery going up one of those hills won't
be very popular with other motorists.

Nor would a diesel bus with an empty fuel tank...

I really don't think it's going to be an issue.

A buses diesel fuel probably lasts all day. If these hybrid buses are
anything like hybrid cars then the battery would run down after only a
few miles without topping up which means its quite possible the bus
could be relying on engine power alone on difficult routes such as I
mentioned if the engine doesn't have the surplus to charge the battery
as well as supplying the motors.

B2003