Deltics have an advanced [for the time] wheel slip detection system that backs off the pneumatic throttle input to the engine governor automatically as soon as any slip is detected, and re-enables it once all six traction motors are back in sync. The engine speed cycling is presumably that system working as intended, not the driver doing anything wrong. You can hear an air hiss each time the revs drop, likely from the slip detect system causing the pneumatic system to vent. Too low throttle to maintain speed and it will never climb a hill!
Yes, the engine revs rise and fall is automatic not manual. I recall back in the day that drivers were encouraged to let it happen rather than select lower power and (depending on location) risk stalling.
Llamgunlo was always wet., along with The Sugar Loaf and Pennybont tunnels. There in Wales,, its always bloody wet here lol. Dad used to have the Old Swindon cross country Dmu's slipping . He wasnt a Nit Wit. He was Top Link Driver at Shrewsbury. Had many a good cab ride with him . Deltics weren't built for the Cetral,,, too slow and windy that route. They need to stretch there legs,,, bit like a Racehorse 😁😁👍😎
Wow. We are so lucky to have the country's top deltic drivers gathered here! If only one of you had been there eh? Then we would be rubbishing you rather than a professional doing his job.
The driver handed D9009 well over the same route northbound on the climb of the Sugar Loaf on a dry day.. 55022 was well driven on the 1 in 120 gradient to Llangyfelach while returning from West Wales.
Maybe this is a heavy load on wet track, but i went up and down from london to edinburgh in the 60's behind deltics and i never noted slipping. It would roll out increasing speed and the driver would then open it out, with that distinct engine noise, and it woul take off. It would be going a good speed, maybe 40 or 50, before opening up, presumably to avoid slipping. Certainly this one was being driven in a totally different way to the Kings Cross and Haymarket drivers.
Deltics were always slow accelerating from stationary but once past 20 mph !!! Wheelslip is a common problem on the railways and it's just something the driver has to cope with
625 tons behind loco on a 1 in 44 rising gradient in pouring rain, of course its going to slip. Best let the built in Wheelslip device do its job. After fourth slip driver does ease it back a bit but this has no effect, its the loco versus gradient .
English Electric fitted pnuematic sanding equipment to nearly all its locomotives from new class 55 Deltics had it, and needed it! I believe only the class 50s had it isolated in later years from memory? The problem with this locomotive is the Driver not the machine.
The idea is when you have high power wheel slip you ease off the throttle until the power level is accepted by the traction motors . The Deltic is a very powerful loco and its power to weight ratio is one of the highest. Something this driver seems to have forgotten or maybe never knew? This is not like driving modern traction that maybe the driver is used to?? I would hate to be the owners watching this video!
Deltics have an advanced [for the time] wheel slip detection system that backs off the pneumatic throttle input to the engine governor automatically as soon as any slip is detected, and re-enables it once all six traction motors are back in sync.
Crikey, some of these drivers, you wouldnt let them drive a car in snow. And before anyone goes on about armchair drivers,my Grandfather was a driver for the L&Y Railway.
Deltics have an advanced [for the time] wheel slip detection system that backs off the pneumatic throttle input to the engine governor automatically as soon as any slip is detected, and re-enables it once all six traction motors are back in sync. that's what is in action her. The driver did in the end reduce the power and that didn't help at all. 625 tons behind loco on a 1 in 44 rising gradient on a loco that had for it's time, highest power to weight ratio
If he was clueless he would not even be in the cab of model Deltic let alone a real one, all drivers have to pass stringent training, health checks and have fast reaction times!
Deltics have an advanced [for the time] wheel slip detection system that backs off the pneumatic throttle input to the engine governor automatically as soon as any slip is detected, and re-enables it once all six traction motors are back in sync. The engine speed cycling is presumably that system working as intended, not the driver doing anything wrong. You can hear an air hiss each time the revs drop, likely from the slip detect system causing the pneumatic system to vent. Too low throttle to maintain speed and it will never climb a hill!
Yes, the engine revs rise and fall is automatic not manual. I recall back in the day that drivers were encouraged to let it happen rather than select lower power and (depending on location) risk stalling.
Llamgunlo was always wet., along with The Sugar Loaf and Pennybont tunnels. There in Wales,, its always bloody wet here lol.
Dad used to have the Old Swindon cross country Dmu's slipping . He wasnt a Nit Wit. He was Top Link Driver at Shrewsbury.
Had many a good cab ride with him .
Deltics weren't built for the Cetral,,, too slow and windy that route. They need to stretch there legs,,, bit like a Racehorse 😁😁👍😎
Thanks. I was going to say "it's in a tunnel so it can't be wheelslip", but I forgot about wet tunnels!! :o)
Trouble is armchair loco drivers on this site
The echoed noise within the tunnel is the stuff of sci-fi series sound effects😂
Wow. We are so lucky to have the country's top deltic drivers gathered here! If only one of you had been there eh? Then we would be rubbishing you rather than a professional doing his job.
The driver handed D9009 well over the same route northbound on the climb of the Sugar Loaf on a dry day.. 55022 was well driven on the 1 in 120 gradient to Llangyfelach while returning from West Wales.
Maybe this is a heavy load on wet track, but i went up and down from london to edinburgh in the 60's behind deltics and i never noted slipping. It would roll out increasing speed and the driver would then open it out, with that distinct engine noise, and it woul take off. It would be going a good speed, maybe 40 or 50, before opening up, presumably to avoid slipping. Certainly this one was being driven in a totally different way to the Kings Cross and Haymarket drivers.
Looks like it’s struggling to get grip
It's a Deltic. Whatever goes wrong they're forgiven. The problem is sitting in the tunnel with all those geeks.
Deltics were always slow accelerating from stationary but once past 20 mph !!! Wheelslip is a common problem on the railways and it's just something the driver has to cope with
Is that Jeremy Clarkson up front??
625 tons behind loco on a 1 in 44 rising gradient in pouring rain, of course its going to slip.
Best let the built in Wheelslip device do its job.
After fourth slip driver does ease it back a bit but this has no effect, its the loco versus gradient .
must have burnt a fair bit of diesel there 😮💨😮💨
Trouble with deltics, no sanding gear
Roger has plenty of sand Kev!
English Electric fitted pnuematic sanding equipment to nearly all its locomotives from new class 55 Deltics had it, and needed it! I believe only the class 50s had it isolated in later years from memory?
The problem with this locomotive is the Driver not the machine.
The idea is when you have high power wheel slip you ease off the throttle until the power level is accepted by the traction motors . The Deltic is a very powerful loco and its power to weight ratio is one of the highest. Something this driver seems to have forgotten or maybe never knew? This is not like driving modern traction that maybe the driver is used to?? I would hate to be the owners watching this video!
Deltics have an advanced [for the time] wheel slip detection system that backs off the pneumatic throttle input to the engine governor automatically as soon as any slip is detected, and re-enables it once all six traction motors are back in sync.
Crikey, some of these drivers, you wouldnt let them drive a car in snow. And before anyone goes on about armchair drivers,my Grandfather was a driver for the L&Y Railway.
Deltics have an advanced [for the time] wheel slip detection system that backs off the pneumatic throttle input to the engine governor automatically as soon as any slip is detected, and re-enables it once all six traction motors are back in sync.
that's what is in action her. The driver did in the end reduce the power and that didn't help at all. 625 tons behind loco on a 1 in 44 rising gradient on a loco that had for it's time, highest power to weight ratio
Cut back on the throttle nit wit...
Have you driven a deltic?
Thats an appalling show from the ehem driver.
Clueless Driver.....
Possibly, but sounds good though doesn't it?!!!!!
@@12crepello it's struggling to get enough sufficient power to move on wet rails.
@@davidhoward2444 would never have thought that 🙄
If he was clueless he would not even be in the cab of model Deltic let alone a real one, all drivers have to pass stringent training, health checks and have fast reaction times!