I wrote that 20 years ago.
When Mark was looking for 6LDA28 related stuff for his web pages I submitted it and its been there ever since.
It was about the first traction related article I ever wrote. Intended for a magazine I forget which one now, might have been Traction, but for some reason did not fit at the time and was forgotten about.
I did a lot of original research for it, it is not based on lifting stuff out of other articles as the subject had hardly been touched at the time. But since then I have noticed anyone publishing anything on this subject has taken much from this.
Nice to see people can find this stuff today and still find it useful.
--
Nick
--- old post above --- --- new post below ---
I disagree the Bps had anything to do with HST development.
And BP are not described correctly as written above.
HST are BoBo power quasi-locomotive power cars - and all the intermediate cars were trailers.
BP were not like that. The end motor coaches were not BoBo but 2Bo - the bogie under the cab is not powered - while the adjacent intermediate coach is not a trailer but a Bo2 motor coach fed off the traction generator. Each pair of vehicles at the each end of each set is a fixed pair. Thus the wheel arrangement of a 6BP is : 2Bo-Bo2-22-22-2Bo-Bo2, insert -22-22- mid train for an 8car.
BP is a true multiple unit with distributed traction .
HST is and never was a distributed traction train.
I am aware of what is stated in the 125 DVD but I suggest that itself is wrong.
The only link is they were fixed formation trains - but you can take any DMU DEMU or EMU and cite them. Indeed a Hastings DEMU is more linked to HST then ever a BP is, as DEMU like that were not distributed traction sets but true end power cars.
--
Nick
--- old post above --- --- new post below ---
As I posted it was myself who wrote that article.
I am not too sure of this which is why it did not get into the article : but I think the Mk1 driving cab car was the vehicle that later became Test Car Hermes DB975081. I believe then this car was functionally more or less the same as a BR SR 4TC driving trailer but instead of BR SR 27way push-pull it carried normal 27way Blue Star but with a seperate engine control air pipe i.e. none of the Westode conversion devices 33/1s had. Anyway, certainly that car was around when those tests were done, but don't think it was called Hermes then. I have never seen photos of the test trains referred to.
I found out much later that one reason ScR went for push pull and using small engines was the idea came from within ScR - from EastFIELD - where around about the time using Type 4s was precluded by their perceived value elsewhere, the new depot engineer transferred in from EastLEIGH and conversant with push-pull 33/1s.
--
Nick
Last edited: