Faulty train at Edgware Road

what's the difference between a C69 and a C77?

ugh; the difference between a c69/77/08... (unless they tried an s stock too early)

The C77s were indeed built to augment the C stock fleet when it took over the "Wimbleware" route, but all C stock was common user and both types could be seen anywhere on the H&C,Wimbleware and Circle: indeed both types would be found in the same train.
The C77s were built could be distinguished from the C69s by having silver roofs, where the C69s were black. 5585/6685 was unusual in having a C69 trailer matched with a C77 DM, added to the second run to replace the original 5585 which had been written off by terrorist activity. As far as I am aware the refurbishment programme removed any significant differences between the two types.

77 minus 69 equals 8, but the C08s were cars built, mainly new but with some recovered parts) to replace those damaged by more recent terrorist activity.

Still wandering aimlessly !

I am sure that, apart from ther cosmetic differences between the two types mentioned above, the C77s was the first LU stock to be built in metric (i.e. mm) rather feet and inches.

1) Don't know
2) Probably Circle
3) C Stock
4) Probably

This topic has turned into a C69/77/08 discussion even more quickly, without answering the question. Uzair was giving the quite obvious answers (except the Circle part & the C stock - happy now?, part which is known to be unreliable apparently - read tubeprunes website which sometimes seems kinda outdated)

Reg; surely both the C69 and 77 stock were metric? Took a quick glance at Steam to Silver, which has the date of 1970 on it, and that says the C69s were the first metric stock? It goes on to attriubute the general differences between the A stock and C stock to this.

Chris: Have patience and chill out. Some questions on here have taken months to answer, but answered they are, eventually.

That's interesting Ben. My memory must be playing up. You may well be right. I'll have a further 'dig' in my records and come back when I can.

C Stock trains are, as said by LU, in a poor condition. C Stock failures occur regularly, and there won't be much to prevent these from happening in the future. I'm sure that the lessons learnt from the negative aspects of the C Stock were taken into consideration and improved for the S7.

Yea, last time I was on the C stock they seemed pretty reliable on the inside. (in the age when graffiti wasn't a problem... last summer xD)