Class 172

[90019]

I'd hazard a guess at that being a camera; the smaller LED lamps will turn Red for when needed.

You can see this in these photos;
White
Red

 

[aspierail]

I have found some pics of the class 172 turbostar.

 

[the sniper]

I have found some pics of the class 172 turbostar.

I think those have been posted before, what was your source?

 

[90019]

I think those have been posted before, what was your source?

It would be from this.
Why the upload to imageshack, I don't know.

 

[Pumbaa]

More pictures on test here, including full length track running.

http://www.old-dalby.com/present.htm

I'm unsure how well the new transmission packages and engines have done, will find out hopefully fairly soon. All I've heard is that it goes like the clappers off the mark!

 

[Aictos]

Probably a improvement on the 150s, any idea what the 150s are like vs the 172s for passenger capacity, how fast it takes to full operating speed ie 75 on the LOROL and 100 on the LM.

Still, could we see better timetabling on the NLL between Gospel Oak and Barking due to the better acceleration of the 172s?

 

[WillPS]

Is it just me that finds it weird that LM's and LO's Turbostars are both classified as 172s, despite being quite substantially different, when there are things like 158s and 159s where the differences are trivial.

 

[The Planner]

Im not convinced you are going to get much out of them timetable wise, whilst they go like the proverbial off a shovel from a stand Ive heard the doors take an age to do. What you gain in A-B time is shafted by the dwells.

 

[ailsa]

I wonder if the design could be adapted for 125mph?

 

[MCR247]

I wonder if the design could be adapted for 125mph?

You mean a 125mph 170 yeah I suppose

 

[ailsa]

You mean a 125mph 170 yeah I suppose

172 specifically - I would imagine the bogies being based on the 220 / 222 design would be good for it, and the 6 speed transmission would help with acceleration / hillclimbing ability.

 

[anonymous0101]

172 specifically - I would imagine the bogies being based on the 220 / 222 design would be good for it, and the 6 speed transmission would help with acceleration / hillclimbing ability.

Line speed on Gospal Oak to Barking line is 50 mph. The fastest line speed on LOROL lines is 60 mph. North London Line and Euston to Watford (DC lines)are 45 mph maximum.

 

[ailsa]

Line speed on Gospal Oak to Barking line is 50 mph. The fastest line speed on LOROL lines is 60 mph. North London Line and Euston to Watford (DC lines)are 45 mph maximum.

I was imagining for if there was a requirement for 125mph units in future, for other lines.

 

[starrymarkb]

Has anyone managed 125mph with a mechanical transmission, I'd have thought with the higher horsepower engines Electric would have been the way to go. Voyagers accelerate rapidly too, but are pegged from max performance

 

[MCR247]

Has anyone managed 125mph with a mechanical transmission,

Class 180 anyone

 

[starrymarkb]

The 180s have Hydraulic transmission.

 

[MCR247]

Sorry

 

[Fincra5]

Those bogies make the train look quite different from side-on.

 

[fgwrich]

Id be interested to know the technical reason why the exhuast manifolds stick out as much as they do on these, and then drop down before bending back upwards towards the outlet/exhuast pipe...

http://www.old-dalby.com/images/172 Widmerpool stn southbound1 9-4-10.jpg

http://www.old-dalby.com/images/Class 172 nr A46 bridge 9-4-10.jpg

http://www.old-dalby.com/present.htm

 

[ailsa]

What I find curious is that while each car has only one exhaust stack, there are pipes on both sides of the powered bogie. At least as far as I can tell by looking at the pictures.

 

[starrymarkb]

Boxer Engine?

 

[swt_passenger]

Id be interested to know the technical reason why the exhuast manifolds stick out as much as they do on these, and then drop down before bending back upwards towards the outlet/exhuast pipe...

I think it is because the bogies have inside frames, ie the frames are within the wheelsets, like on 220s. On older DMUs eg 158s the exhaust passes over the bogie, between it and the underside of the coach, where there is room available for it. So on these the only room is outside/above the wheels.

Be interesting to see the real thing close up but I'd expect the horizontal pipe is still within the bodyside limits, and the drop down before bending up will be to form a smooth curve for the gas flow, I think.

So now you might ask where does the exhaust go on a 220? Up through the carriage at the inner end of the bogie, and the inner end of the lobby. You can see where it comes out on the roof...

 

[2030720310]

Are there any pictures of the London Midland ones yet?

 

[the sniper]

Are there any pictures of the London Midland ones yet?

I haven't seen any, buy RAIL said in their most recent issue that work has started on LM's 172's. I'm dying to see them!

RAIL also said that LM should now be getting their first units in Autumn.

 

[Kneedown]

The 180s have Hydraulic transmission.

As do all Sprinter and Turbostar type units. The term "mechanical" is a bit misleading as they all use a Voith type automatic hydraulic transmission.

 

[jopsuk]

All the current ones do- but the 172s do, in fact, use mechanical transmission- that's why it has been mentioned.

 

[Kneedown]

All the current ones do- but the 172s do, in fact, use mechanical transmission- that's why it has been mentioned.

So........ How do the gears change then? I presume the Driver doesn't do it manually like on a blue square DMU?

 

[Wyvern]

It's a six speed automatic. Presumably epicyclic with a fluid flywheel.

 

[Kneedown]

It's a six speed automatic. Presumably epicyclic with a fluid flywheel.

Torque converter changing to fluid coupling? Same as on 15X's and 170's? Which would make it Diesel Hydraulic wouldn't it?

 

[anonymous0101]

Torque converter changing to fluid coupling? Same as on 15X's and 170's? Which would make it Diesel Hydraulic wouldn't it?

I read somewhere it is a 6 speed ZF automatic perhaps similar to what is used in buses and some coaches. However this transmission is limited to around 360 bhp.