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Author Topic: Pilot and push engines  (Read 655 times)

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Online crewearpley40

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Re: Pilot and push engines
« Reply #15 on: May 25, 2019, 06:35:40 AM »
I thought drs provided a top and tail with mk 2s and two locos. More comfortable than a dmu for the cumbrian communities

Online chrism

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Re: Pilot and push engines
« Reply #16 on: May 25, 2019, 07:35:40 AM »
I thought drs provided a top and tail with mk 2s and two locos. More comfortable than a dmu for the cumbrian communities

Nope - two top and tails with two 37s (when they didn't break down) and two DVTs.

The only trains I've seen (from my front window, I might add) with two locos have been the nuclear flask trains.

I'd certainly have noticed two 37s on a regular service train, they were noisy enough with just one ;-)

Online crewearpley40

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Re: Pilot and push engines
« Reply #17 on: May 25, 2019, 08:26:58 AM »
Bet that would make a fine sight let alone the noise

Online chrism

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Re: Pilot and push engines
« Reply #18 on: May 25, 2019, 08:40:02 AM »
Bet that would make a fine sight let alone the noise

Each to their own ;-)

Offline paulbeckwith

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Re: Pilot and push engines
« Reply #19 on: May 25, 2019, 09:05:43 AM »
hi  all

  drs  2 x 37 s    between  Norwich  and  great  Yarmouth  virtually   daily     some  times  2 x  68 s


   paul

Offline Bramshot

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Re: Pilot and push engines
« Reply #20 on: May 25, 2019, 01:09:49 PM »
Iím a bit surprised that no has mentioned running the two locos as a Ďconsistí, which most dcc systems are surely capable of doing. You still need to speed match them and watch out for the back emf settings so they donít fight each other, but with a consist you can control both locos with a single throttle.

Offline jpendle

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Re: Pilot and push engines
« Reply #21 on: May 25, 2019, 02:58:56 PM »
I deliberately didn't mention Consisting as on the Z2, which I use, it does it for you, there are no CV's to program when double heading, or top & tailing.

You run each loco at least 3 times (more is better) over a fixed distance (the absolute distance doesn't matter, but the longer the better) using different speed step settings each time and time the run. In the loco screen on their app you record the speed steps versus the time.

Then you add a 'train', pick the 2 locos you want and you're done. When you've finished double heading you select one of the two locos and drive it away.

I've never needed to explore consisting using CV programming.

As I tried to imply earlier your choice of DCC System and DCC decoders will determine how hard it is to do double heading or top & tailing.

Regards,

John P
Check out my layout thread.

Contemporary NW (Wigan Wallgate and North Western)

https://www.ngaugeforum.co.uk/SMFN/index.php?topic=39501.msg476247#msg476247

Offline LowerQuadrant

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Re: Pilot and push engines
« Reply #22 on: May 25, 2019, 03:34:53 PM »
Iím a bit surprised that no has mentioned running the two locos as a Ďconsistí, which most dcc systems are surely capable of doing. You still need to speed match them and watch out for the back emf settings so they donít fight each other, but with a consist you can control both locos with a single throttle.

I believe that this constellation shouldn't cause too much trouble if the locos are synced well enough. I'm a bit more concerned about cars being pulled/pushed out of the curve with a (motorised) loco on each end.

Today I made an experiment with a simulated dummy loco. I fixed some coins onto the roof of a hst coach with blu tack, in total 120 grams of dead weight. I pulled and pushed a rake of five mk3-coaches over some tight curves and points for several times. No trouble.

Offline Garyf

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Re: Pilot and push engines
« Reply #23 on: May 25, 2019, 05:33:39 PM »
Hi, the North Norfolk Railway run their 'mainline dining' specials with a Class 20 (Sherlock Holmes) pulling the diners plus the Std 4 from Sheringham to Cromer, then the Std 4 pulls the return route. This is because there's no run round at Cromer. It's quite a caper as the road has to be temporarily closed to allow the train to cross from Sheringham (NNR) to Sheingham ( Network Rail).

Gary

Offline TrevL

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Re: Pilot and push engines
« Reply #24 on: May 27, 2019, 12:00:37 PM »





I have, just, setup 2 of my 68's to run push pull with a nuclear flask train.



Regards,

John P

Just a heads up John, I regularly see nuclear flask trains on the North Wales coastal line, (presumably coming from Anglesey), and they are never push pull, always double headed.
Cheers, Trev.


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