What class of 'Peak' is this?

[Simon E]

I took this photo a year or so ago and I'd like confirmation as to which class of Peak loco it is. I think I know but don't want to say as this might lead to agreeing with me rather than a true identification from an expert!

 

[43096]

Class 45/1. The ETH jumper on the buffer beam gives it away.

 

[delt1c]

45

 

[Simon E]

Thank you

45

Thank you that's what I thought it was but didn't take any notes when i took the photo!

 

[VicH]

I believe you can't tell them apart

 

[Neptune]

45/1 to be more precise as it contains an ETH cable (the orange box by the buffer for the unintiated).

 

[hexagon789]

The ETH connector basically confirms it as a 45/1.

If that wasn't present, there are two ways of telling 45s apart from 46s, but where they would be are not visible in that photo!

 

[Neptune]

The headlight between the marker lights also confirms it is one of the locos which lasted later in service (fitted around 1986 I believe) and the last of the surviving locos was withdrawn in 1988.

Not sure which of the preserved locos retain this feature but from memory 132 and 133 retain them.

 

[Elecman]

Class 45

 

[Intercity110]

What’s the difference between the different classes of peak?

 

[Simon E]

Thanks again for all the answers. the photo was taken last summer at The Midland Railway Centre

 

[Neptune]

Thanks again for all the answers. the photo was taken last summer at The Midland Railway Centre

That makes it 45133

 

[Skymonster]

45133

 

[Kneedown]

What’s the difference between the different classes of peak?

Not too sure about 44's apart from disc headcodes and driving controls.
The main difference between 45s and 46s is Crompton Parkinson electrics on the 45, and Brush electrics on the 46.
45s also had big brass power handle and reverser, along with a visible "X" form on the fuel tank. A 46 had similar controls to a 47, and a plain sided fuel tank.

 

[2392]

What’s the difference between the different classes of peak?

The main differance between the class 44 and 45 being the type of engine used. With differences between the 45's and 46's being the electrical equipment [i.e. traction motors and the like], otherwise they had the same engines.

 

[Simon E]

Thanks for kneedown and 2392 for the posts on the differences between the two. I figured this was photo was 45133 from previous internet searches but had another peak class photo (44 ?) from the same day so wanted to be sure

 

[2392]

The 44's were part of the modernization plan I believe an shared the same style body. There are two survivors from memory one being Penyghent and there were IIRC only 10 built all named after various "peaks" hence the generic name of the three classes....

 

[12LDA28C]

Thanks for kneedown and 2392 for the posts on the differences between the two. I figured this was photo was 45133 from previous internet searches but had another peak class photo (44 ?) from the same day so wanted to be sure

A 44 looks very different from a 45, apart from 44009 which had a central headcode panel at one end in later life.

 

[Pigeon]

Not too sure about 44's apart from disc headcodes and driving controls.

12LDA28A engine rather than 12LDA28B, 2300bhp rather than 2500.

 

[70014IronDuke]

12LDA28A engine rather than 12LDA28B, 2300bhp rather than 2500.

Perfectly true - but you can't see that unless you are in the engine room, and can spot the lack of an intercooler between the turbocharger and cylinder heads.

 

[Kneedown]

12LDA28A engine rather than 12LDA28B, 2300bhp rather than 2500.

Cheers. Had a hunch it was something to do with the engine, but wasn't sure.

 

[E27007]

The main differance between the class 44 and 45 being the type of engine used. With differences between the 45's and 46's being the electrical equipment [i.e. traction motors and the like], otherwise they had the same engines.

A quirk of the Peaks, concerns multiple working, at new build , the 44 D1 to D10 had disc headcode and corridor end-doors on the cabnose, then the first few members of the class 45 from D11 onwards had split-headcode boxes and corridor end-doors, there was little call for multiple working, the end doors were soon abandoned, I'm not sure of the quantity of the latter, but around 8

 

[Richard Scott]

There are a few other differences between a 45 and 46. The 45 has 220V auxiliary electrical machines such as compressors and exhausted whereas the 45s are 110V. The fan on a 45 is electrical whereas a 46 is hydrostatic. The 45 has its traction motors wired in parallel and 5 stages of field weakening and the 46 is a series parallel arrangement with 3 stages of field weakening.

 

[12LDA28C]

There are a few other differences between a 45 and 46. The 45 has 220V auxiliary electrical machines such as compressors and exhausted whereas the 45s are 110V. The fan on a 45 is electrical whereas a 46 is hydrostatic. The 45 has its traction motors wired in parallel and 5 stages of field weakening and the 46 is a series parallel arrangement with 3 stages of field weakening.

Interesting but again not anything you can easily identify by looking at a loco from the outside

 

[Cowley]

On the subject of detail differences, does anyone know what the triangle (ish) shaped grille on the lower part of the body side is for?


It seems to me that all of the class 46s have them but not all of the 45s, unless I’m looking at it wrong and they’re only one side of the loco maybe?

 

[Ken H]

Why the 1Co-Co1 wheel atangement. And what allowerd Cl47 to be Co-Co?
Did the 'peaks' share a common bogie design and were they interchangeable? Or does a bogie feature help telling the classes apart.
No-one has mentioned traction motors yet!

 

[Richard Scott]

Interesting but again not anything you can easily identify by looking at a loco from the outside

No, appreciate that but seemed to have drifted onto general differences.

== Doublepost prevention - post automatically merged: 14 May 2023 ==

On the subject of detail differences, does anyone know what the triangle (ish) shaped grille on the lower part of the body side is for?
View attachment 135037

It seems to me that all of the class 46s have them but not all of the 45s, unless I’m looking at it wrong and they’re only one side of the loco maybe?

They were added as part of a 60s refurbishment, I believe. Air filters added to side grills at the same time and not all 45s have them but, as you say, sure all of 46s had this modification. 45149 certainly doesn't have the modification.

 

[Cowley]

They were added as part of a 60s refurbishment, I believe. Air filters added to side grills at the same time and not all 45s have them but, as you say, sure all of 46s had this modification. 45149 certainly doesn't have the modification.

Another long time question answered. Thanks Richard.

 

[12LDA28C]

Why the 1Co-Co1 wheel atangement. And what allowerd Cl47 to be Co-Co?

In a word - weight.

 

[Ashley Hill]

No, appreciate that but seemed to have drifted onto general differences.

== Doublepost prevention - post automatically merged: 14 May 2023 ==


They were added as part of a 60s refurbishment, I believe. Air filters added to side grills at the same time and not all 45s have them but, as you say, sure all of 46s had this modification. 45149 certainly doesn't have the modification.

And yet looking at JohnW1s photo of 45139 today shows one plated over.