3 December 2018
A quick update on the differences between US and European arrangements for placing air-pipe connection and lights on the front of a train. This is the result of my ER (equally retired) BiA (brother in arms) David Sell from California, ex-Santa Fe & Amtrak pedigree, someone worth to hold on to. He replied to my inquiry about the array of air lines between loco and train. His answer was revealing in a number of ways, as it deals with technical matters as much as what is considered necessary for keeping up public safety when operating trains. Europe and North America differ on a number of issues there and I thought you might like to hear about it. For what is coming now you’ll need Amy’s picture of the Amtrak AEM-7 and PRR GG1 number 4800, the black one with the riveted skin, published earlier.

Point is that this picture actually gave me a chance to have a good, detailed look at the buffer beam of modern US traction for the first time since the 1980’s. Incidentally, in the new book I mention the restricted forward view from the driver’s windscreen on the GG1. The minimal windscreen that you see on this machine is the one that the driver sits behind. Good thing that the fireman, now the shunter and the one with the responsibility for the oil-fired steam generator, sat at the left hand side of the cab when travelling. No way this loco could be used without two pairs of trained eyes in the cab, the situation as on a steam engine.
Let’s first look at the brake/ main reservoir pipe arrangement on the GG1, as the differences between de European set-up and the US array are not yet that obvious here. On the lower right hand side, next to the coupler, we see the brake pipe and the main reservoir pipe. Properly stowed, incidentally; not doing that is a problem everywhere one goes and visits railway premises with a knowledgeable eye. On the left side of the coupler the steam heat connection, above the coupler the coupler-release levers. Nothing that much different from what we can see here. The six covers are for m.u jumpers and the like, pretty much standard on the Pennsylvania Railroad in their days. If we now turn to the AEM, we see that the coupler release lever sits uncomfortably low and that there are grab handles higher up to aid the shunter to use force without doing his back in. The brake and main res pipes are in fact right there where the GG has them as well, which should have given me a hint. So the four shiny new pipes hanging down have a different function.They do indeed. As David reports from scorched California, the two pipes directly either side of the coupler are Multiple Unit Main Reservoir Equalizing pipes and the ones outside either side are application and release pipes for the independent brake, or in British Rail parlance they connect the Straight Air Brakes on coupled up locomotives with each other in order to be able to use the independent/ straight air brakes on all available loco’s from the working cab. Which answered another question I had for a long time: why did locomotives of the first post WWII generation in The Netherlands have an extra brake pipe in the centre of their front above the coupler. The answer turned out to be a M.U. straight air brake pipe connection, especially useful when Netherlands Railways started to use four in m.u. on the coal and ore trains from the coast into the German Ruhr Area. The US influence on Dutch details in the operating area breaking surface; even the French built Alsthom electric and DE locomotives had them here, but not in France in France or elsewhere where they were used (Russia, as the case is, possibly replacing the GE “Little Joe’s” that never were sent over).In the US case, the equalising main reservoir equalising connection probably has to do with ensuring that compressors and brake control installation on the loco’s behind the controlled one will not start to charge the brake pipe when the driver up front is using the brake and therefore lowers the pressure during braking (Dave?). It is that I remember similar but electrically controlled arrangements in the UK on Southern DC multiple unit trains.The brake release pipe is interesting as I worked with brake valves in the UK that could be used to give an overcharge when attempting to release the train brakes on a long train. You could temporarily blow a higher pressure into the brake pipe to induce the triple valve or other air brake control units to give up being a nuisance and move other to release the brake block or pads from the wheels/ brake discs. Handy if early in the morning you had to prepare locomotives after a night standing around with working engines and the brakes didn’t come off easily. Or you had to use the air brake on stock that had been sitting around for a long time.
The head and tail lights. As we see on the GG, the headlight is very obvious and the tail (marker-) lights can be found in the Raymond Loewy arrangement up there either side of the nose, with the loco-number (reporting-) lights in their sides. Then the AEM from top to bottom. In the USA it is mandatory that a train entering a public area makes its approach unmistakeably clear to the congregated public. Hence the “sexy” horn array and the two white coloured strobe blinking lights on top, often bells are added. This is no longer mandatory in Europe and with the amount of trains entering and leaving stations it would probably lose much of its use indeed. The red light between the reporting light boxes above the windscreen is an emergency indicator; it flashes when used and indicates to a train on an adjacent track that it is not allowed to pass the train showing this signal due to potential fouling equipment or people on the track. Similar function to steady or flashing red and white all-light indications on a vehicle this side of the Atlantic, therefore. The two red lights, steady indication when switched on, under the windscreen are the marker/ tail lights. This adheres to the rule that when the loco forms the tail of a propelled push-pull service, its passing must be clearly indicated as much as that people working on the track are aware that the train is moving away from them. The white double light is the same as seen on US-built loco’s in the UK, which is called the headlight here. Like we can see over here, the light can be switched to a bearable brightness with one lamp lit, or a foul-language inducing brightness if the driver forgets to switch the second lamp off or bears a grudge against you (East Robinson in the book). The two white lights low on the front have the name ditch lights in the US and Marker Lights in the UK. Normally they show a steady indication and form a triangle with the headlight as we see over here, but they can flash as a wig-wag to once again form a warning to people on level crossings, platforms and along the track to look out for the approaching train. Not something seen in Europe but most certainly in many African and South American countries, Australia and New Zealand.
In the book I talk about Budd rail vehicles with their characteristically ribbed sides, we had them in Europe (France, Portugal) as well. The coach behind the AEM is such a Budd cladded coach in stainless steel.
The picture: The bogie/ truck of an AEM. The lose hanging wire is a negative bond between the loco-body and the axle/ wheel to conduct static, stray and Earth Fault electricity to the track to avoid it causing hazards on the loco like malfunctions or unjustified indications On the axle box of the front axle we see what looks like the speedometer connection. The primary suspension is made up of rubber and steel laminate springs, nothing wrong with that but as can be seen here tightly caught in the truck to avoid uncontrolled side-ward excursions like it was possible with the GE floating bolster in the secondary suspension. The sizeable vertical motion dampers point at a similar tight control in that direction, actuating between the big grey bolster-box that is not fitted to the truck frame but to the loco-body and covers the no less than three doubled secondary suspension spiral springs either side that carry the loco-body on the truck. Notice the levers that hold the forward/ rearward and traction power bolster-arrangement in place between the top end (grey box) and the bottom-end (plank under the secondary suspension springs. Have a good look inside the outside springs to see the springs inside them. There are steel wires under this box, fitted to ensure that the truck will not break away during a derailment. Something that was much discussed in Britain after the high-speed Ufton-Nervet derailment, where broken-loose air-sprung Bt-10 bogies caused severe damage to the stricken train. The wheels are interesting: they are Swedish SAB resilient wheels. Inside the rusty looking tyre with the bolts that hold them to the main wheel there are elastic blocks that enable movement of the tyre on the main sections of the wheels. Failure of this set up was what caused the terrible Eschede high-speed accident with 101 fatalities in 1999 (see the book).


















