Steam speed records including City of Truro and Mallard

Welcome back.
Defend a standpoint until one gets wiser.
This happens quite often for me as well.

I have tried to find the place to buy a copy of roll, but cannot

Hope to find where that strange looking,breakdown- prone locomotive ,did not run 124.5mph.
I need that to calibrate my cheap , dirty and easy to use train resistance model and hope to get a medal and a Nobel prize.

 

I at no time suggested anything you have said in your first paragraph and am surprised at your OTT reaction..
As a matter of fact I have long admired your research on Thompson et al and was only remarking that in spite of your and many others research, we are still no nearer to a definitive conclusion.
I am not and have never been critical of your research and am unaware why you are not using the site as I have always enjoyed reading your posts and would like to see you back.

 

The details you need are on this page - send them a request form, or an email if you're not sure exactly what to ask for, and they'll advise the cost:
https://www.railwaymuseum.org.uk/research-and-archive/further-resources/copying-and-copyright

 

Thank You for link.
Have difficulties navigating it and will probably try again later.

 

If you're having trouble navigating a link, what makes you think you can accurately interpret a dynamometer roll?

 

Or just email search.engine@railwaymuseum.org.uk

 

Have done.Thank You

 

Yawn.

 

I wouldn't worry - if he can't navigate links to the RM, what hope has he got of interpreting a dynamometer roll?

It is beyond tedious though.

 

It's also a ball of wibbly-wobbly, timey-wimey stuff (with credit to S Moffat)

 

And that’s just the line on the dynamometer car tape

 

A much more plausible question is what was recorded at 99mph.before the Flying Scotsman? Eh?

 

I would take a sundial if I could get on the footplate. I suspect the uphill sections were even more enjoyable than the down gradients but perhaps not for the fireman.

 

Truro was a punchy little monster. I just wonder if the outside frames and rods reduced the drag coefficient somewhat?

 

Well, I believe people could still see it , , ,

 

I need to stop breaking my rule…

The point I am making to you is that you need to open your mind up to the possibilities of research.

If you think nothing can be “proved” then the work I did for Thompson shouldn’t have happened. I was told often enough (even on this very forum) that I was wrong, it was daft, there was enough research done, etc etc…

…and it turned out that Thompsons story had been recorded completely inaccurately.

So I am going to be careful in my choice of words.

I’ve said this to you before, being antagonistic in the way you have been is not a good look if you want your research to be taken seriously.

Mallard did achieve 125mph, I am in no doubt of that. You will find the record is very clear there.

I think you will be surprised what you find when you read the roll.

Three different researchers, including me, have had different interpretations. Two out of the three concluded that 126mph was more likely than not (I am one of them).

All of us agree it was for a very short section, and by far more impressive is the acceleration up stoke bank and maintaining the over 120mph for more than a mile.

More than just the frames and the rods, tbh. This has cropped up in my research and my answer is a firm “no” on the basis of aerodynamics and basic power calculations.

 

For a nineteenth century precedent, you have to look to Stroudley for someone who was well ahead of the pack when it came to streamlining.

I believe this fairing was added in an attempt to increase speeds off Drumochter to make up any time lost on the preceding climb. Stroudley was evidently proud enough of the innovation to be photographed standing on the running plate of his creation ...





Tom

 

Surely though that’s the picture of the air brake in its deployed position? Necessary because of the speed the fairing underneath allowed coming down the bank!

 

Thank You for advice.
Getting pensioned means that one can research without thinking of how to get more future support from comitees of green concerned women or patriotic book customers.
I hope You live long enough to try it.
126mph?
Can you give an estimate of power needed to accelerate 400 ton from 124.25mph to 126 mph within one eigths of a mile(200m will do)?