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Dave Scott

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Posts posted by Dave Scott

    The human side of the railway...

    in UK Prototype Discussions (not questions!)

    Posted

    I know what you are saying but if it had been air braked for today's railway it would have a main res pipe

    The problem I have found is total lack of info on braking system fitted on any loco. Data sheets have every piece of info bar brakes. It is annoying. What is even more anoying is that I was at Whitby recentlly and could have checked but didnt give it a thought and it was the B1 which hauled the train to Pickering

    OO Gauge class 71 Electric Locomotive

    in DJModels

    Posted

    I managed to get some 'quiet time' this morning, so set up the camera wagon behind the class 71 for a change (usually when I am doing a "cab ride" I have the wagon in front of the locomotive).

     

    I have demonstrated some, but not all of the features of the locomotive and legomanbiffo sounds. For the record, the speed was settled at step 50 (out of 126) on my NCE Pro Cab.

     

    Sounds include the roar of the traction motor blower (I think I need more bass for this, so a larger, bass reflex speaker may be finding its way into the locomotive in the future), the two slightly different air whistle tones (F2 and F3), the marker lights (F0 - left on to give the locomotive some 'presence' in the darkness of the tunnels), directional cab lights (F19), cab door slam (F6), and the lovely compressor sound (F7).

     

    As you can see, the LokSound v4 decoder seems to have no problems with controlling the locomotive smoothly. It was originally set for a class 350 (hence the written label visible in an earlier photo I took) but I did a reblow with 'Bif's sounds late last year, and have changed nothing in the settings except the volume (CV63).

     

     

     

    I have noted the slight wheel wobble on the low-sided wagon just ahead of the camera - a wheel change will be executed soon!

    Good video however the guard in me kept yelling - turn the red marker lights off - its not the rearmost vehicle - guards have a fixation with tail lamps

    OO Gauge class 71 Electric Locomotive

    in DJModels

    Posted

    Mines exactly the same. Had a long series of emails with Dave Jones re. CV settings but it still sounds like an old diesel tractor ticking over & jerks like a very jerky thing at low speed. Mines going back as well.

    I would seriously suggest that before sending it back you try it on DC from a non feedback controller to decide if a loco problem or a decoder problem

    OO Gauge class 71 Electric Locomotive

    in DJModels

    Posted

    Took delivery of my weathered 71 today. Lovely model with exquisite moulding (particularly the bogies) and fine details (pantograph).

     

    There was a couple of oil marks on the body which slightly marred the weathered finish, but the faded with gently rubbing with a slightly damp cotton bud.

     

    The one thing that is a slight concern is that the loco is developing a slight surging effect. It can't be heard but I can see it slightly pulsing at about once per wheel revolution.

     

    It's unchipped at the moment and I delicately placed a couple fo drops of oil on the gears as instructed.

     

    Has anyone experience something similar? And has anyone got a suggestion as to what is causing it and / or suggestions of how to stop it?

     

    It seems like a slight binding in one of the gear towers / bogies but I may be wrong.

     

    Thanks

     

    Luke

     

    PS it is not at all sufficient to return it!

    Are you running DC or DCC. I run DC and got jerky running on an old ECM controller but not on a gaugemaster. If running DCC there appears to be a need to tune the decoder to the coreless motor. See posts in this thread

    OO Gauge class 71 Electric Locomotive

    in DJModels

    Posted

    ISTR - not too well initially - but they are longer and have a co-co bogie so the shoe centres are further apart and less likely to run into a full gap - at least one shoe is usually on the c/rail somewhere (all the shoes being connected together) - I suspect they also have clever traction packages that "accumulate" - bit like a electronic booster set too .......................

    I was once told of a tale at Waterloo. A12 car train got gapped so it was decided to bring forward the train behind which was also 12 car to give it a nudge. The operators discovered you can gap  a 24 car train

     

    I was also told of a problem at Adiscombe depot, now demolished. Sometimes the unit would not roll as expected and got gapped. A very dodgy local fix was to rest a shorting bar on an adjacent third rail lined up with a shoe.The driver would select notch 1 and the shunter would pivot the shorting bar to touch the shoe and nudge the unit forward This tale was told to me by one of the fitters at the depot

    • Like 1

    OO Gauge class 71 Electric Locomotive

    in DJModels

    Posted

    Thanks for that, just intrigued. Thought they probably did just coast over gaps, think that's  what happens on AC lines too. 

    The difference between AC OHL and DC third rail is that on AC the neutral sections are specific defined points. On third rail the gaps are more random. For example the gaps will be different for different platforms at a big station like Waterloo or Victoria. The collector shoes are quite happy to hang in clear air between the gaps in the third rail being guided back into contact by the end ramp on each third rail rail. A driver will not know where the shoes are in relation to the gaps hence the potential for large arcs. OHL of course needs to be continuous hence the structures found at neutral sections.

    OO Gauge class 71 Electric Locomotive

    in DJModels

    Posted

    Daave - great model, runs well at running in stage. Havn't tried it on load yet.

     

    Re controlers I have three, up, down and a handheld for the yard. The yard and up are gaugemasters and give smooth running for the 71. The down controller gave a poor response and a jerky noisy running at slow speeds. I am going to replace it with a non feedback gaugemaster just to be on the safe side. In the meantime the 71 will have to do all its running in on the up line

    OO Gauge class 71 Electric Locomotive

    in DJModels

    Posted

    In the "stop read me now" info is a warning that older feedback controllers may not be suitable for coreless motors. Of the three DC controllers I have the oldest has poor slow running characterestics. Looks like I will have to get a new controller as well.

    The human side of the railway...

    in UK Prototype Discussions (not questions!)

    Posted

    Lovely clip there Mike - I do recognise the Driver but can't recall his name, the Secondman looks very familiar but likewise, I don't recall his name either. I'll post the link on the Old Oak farcebook group and see what transpires.

     

    Edit - it's already on there... the HST Driver is Earnie Stead, the young Second man on the 47 is Gareth Williams while his Driver is Bryn Jones and the Guard is Eric Berry.

    The second man on the 47 has the curly mop that was common back in the day. I wanted to shout "get yer hair cut"

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