Class 172's

[YorkshireBear]

http://www.youtube.com/watch?v=uT9ok2Kg5oU

spied this video on youtube, it looks to me to be doing more than 60?

If so does this mean it has been succesfully modified?

Only looks faster i may be wrong.

 

[asylumxl]

I saw one going at a fair old rate towards London through Luton Airport Parkway a while back. But people told me they weren't capable of over 45mph...

 

[Class377/5]

http://www.youtube.com/watch?v=uT9ok2Kg5oU

spied this video on youtube, it looks to me to be doing more than 60?

If so does this mean it has been succesfully modified?

Only looks faster i may be wrong.

It was reported in Rail I think that they solved the problem.

 

[ainsworth74]

I've heard that they have solved the problem so presumably that is one of the units that has had the fix applied and is either continuing its testing programme or testing the fix.

 

[swt_passenger]

I've heard that they have solved the problem so presumably that is one of the units that has had the fix applied and is either continuing its testing programme or testing the fix.

I don't think it is fixed. If you stop the vid you can still see the combined vertical exhaust between the carriage ends. The solution is to run the exhaust through the saloon by one of the doors.

 

[Mojo]

Had a ride on 172005 (I think) on the Goblin yesterday. Air conditioning was very cold and passengers were complaining. Also hearing the mechanical transmission was very strange, hearing the gears change sounded almost like a bus.

 

[the sniper]

According to Roger Ford (aka Captain_Deltic) via Twitter today:

Class 172 exhaust 'problem' is not a problem says LOROL. Tests were flawed apparently and mods will not be needed after all.

Bizarre, heh? Looks like Derby can build decent trains then, they just can't test them properly...

 

[Fincra5]

Off topic really but why are the 172s mechanical, rather than hydraulic transmission, like the other turbostars?

 

[WatcherZero]

How can a vehicle engine choking at 2/3rd its planned max speed be a testing issue?

 

[asylumxl]

How can a vehicle engine choking at 2/3rd its planned max speed be a testing issue?

I don't know what tests they are reffering to.

But it may just be a misreading of back pressure in the exhaust systems and as such a calculated restriction.

 

[the sniper]

Looking on Roger Ford's Twitter page again, he has subsequently said that the 'exhaust pressure readings were taken in the wrong location'.

 

[Peter Mugridge]

All three GOBLIN diagrams today were 150s. All the 172s ( apart from the one not delivered and the one that ran back to Derby ) appeared to be on shed at Willesden.

 

[Wyvern]

Off topic really but why are the 172s mechanical, rather than hydraulic transmission, like the other turbostars?

Fuel efficiency? Just a guess

 

[ailsa]

Fuel efficiency? Just a guess

Improved fuel efficiency and reduced weight are the reasons I have heard.