drewn Posted September 13, 2017 Share Posted September 13, 2017 I've got a Bachie 08 which I feel needs to run a little faster. I have a Powercab controller and when I tried to adjust CV5, the max voltage Cv, I was told it could not read the value. I can read and adjust others, like CV3 &CV4. So why does it only read certain CV's ? Secondly, I've read about "yard" running but I can't find the bit in the manual to check if indeed it is on yard running! Am I missing something obvious ? Link to post Share on other sites More sharing options...
johnb Posted September 13, 2017 Share Posted September 13, 2017 Some chips do not permit alteration of some CVs. what chip are you using? John Link to post Share on other sites More sharing options...
RMweb Gold imt Posted September 13, 2017 RMweb Gold Share Posted September 13, 2017 I've got a Bachie 08 which I feel needs to run a little faster. I have a Powercab controller and when I tried to adjust CV5, the max voltage Cv, I was told it could not read the value. I can read and adjust others, like CV3 &CV4. So why does it only read certain CV's ? Secondly, I've read about "yard" running but I can't find the bit in the manual to check if indeed it is on yard running! Am I missing something obvious ? You might have seen the other threads on programming track and a fried chip in which I have been involved. I too use an NCE PowerCab. I think you will find that Yard Mode is for PowerPro only. I have to say that in program track mode (not program on main - the fourth option on the Prog/Esc key) I have been able to read CVs 2,5 and 6 as well as change them. Link to post Share on other sites More sharing options...
HLT 0109 Posted September 13, 2017 Share Posted September 13, 2017 Don't forget that the 08 had a maximum speed of about 18mph - scaled down, that is about 4" per second in 1:76 scale - less than the length of the loco. Link to post Share on other sites More sharing options...
RMweb Gold imt Posted September 13, 2017 RMweb Gold Share Posted September 13, 2017 Don't forget that the 08 had a maximum speed of about 18mph - scaled down, that is about 4" per second in 1:76 scale - less than the length of the loco. Wow that threw me. I don't know why I doubted you but I went and checked it for myself. This is way off topic but it's the reason I like DCC sound - it makes you drive to the sound. Nothing is more disappointing at exhibitions than to see locos whizzing about and stopping abruptly. I'm not sure what to set the CVs at to get this performance but I'll redouble efforts. Link to post Share on other sites More sharing options...
HLT 0109 Posted September 14, 2017 Share Posted September 14, 2017 Wow that threw me. I don't know why I doubted you but I went and checked it for myself. This is way off topic but it's the reason I like DCC sound - it makes you drive to the sound. Nothing is more disappointing at exhibitions than to see locos whizzing about and stopping abruptly. I'm not sure what to set the CVs at to get this performance but I'll redouble efforts. My 08 is a Bachy - out of the box it travels at only about a scale 20mph - no sound chip, just a basic decoder without any facility to adjust speed settings. I have been able to check speed settings as I have a speedometer that I bought from "Steve's Depot" in the States. A very useful aid to speed matching. Link to post Share on other sites More sharing options...
Pete the Elaner Posted September 15, 2017 Share Posted September 15, 2017 I have been able to check speed settings as I have a speedometer that I bought from "Steve's Depot" in the States. A very useful aid to speed matching. An alternative to this is to make your own speed trap. Measure a section of your layout & use the formula for speed: distance/time. The distance will not change so you can compile a lookup table to measure the speed at different throttle settings. Link to post Share on other sites More sharing options...
drewn Posted September 15, 2017 Author Share Posted September 15, 2017 An alternative to this is to make your own speed trap. Measure a section of your layout & use the formula for speed: distance/time. The distance will not change so you can compile a lookup table to measure the speed at different throttle settings. Actually guys, I've measured the scale speed of this loco and it manages about 20mph. Which of course is pretty good. So I'll leave it at that. Thanks for replies Drew Link to post Share on other sites More sharing options...
RAF96 Posted September 15, 2017 Share Posted September 15, 2017 I saw an instant speed calculator - using coach lengths. 1 & 1/2 coach lengths passing in 1 second is equivalent to 60 MPH in any scale. No doubt someone will come back with the calcs based on feet per second and length of a typical coach and words that prove scale doesnt matter as the length of the coach and speed on track varies according to scale but the time is a constant ratio. Rob Link to post Share on other sites More sharing options...
Pete the Elaner Posted September 15, 2017 Share Posted September 15, 2017 No doubt someone will come back with the calcs based on feet per second and length of a typical coach No need because you have already done it. a 75' Mk3 would have to move faster than a 57' LMS coach to pass the same point in 1 second. Using 1 coach is also a little short to get any accuracy. Link to post Share on other sites More sharing options...
drewn Posted September 15, 2017 Author Share Posted September 15, 2017 No need because you have already done it. a 75' Mk3 would have to move faster than a 57' LMS coach to pass the same point in 1 second. Using 1 coach is also a little short to get any accuracy. I just selected a fixed length of track, 6ft to be exact, measured the time taken to travel over it in seconds then extrapolated into 12in.: 1ft speed. (Thanks for giving me the chance to use the word "extrapolated") Link to post Share on other sites More sharing options...
RMweb Premium PaulCheffus Posted September 15, 2017 RMweb Premium Share Posted September 15, 2017 You might have seen the other threads on programming track and a fried chip in which I have been involved. I too use an NCE PowerCab. I think you will find that Yard Mode is for PowerPro only. I have to say that in program track mode (not program on main - the fourth option on the Prog/Esc key) I have been able to read CVs 2,5 and 6 as well as change them. Hi Yard mode or shunting mode is usually setup in the decoder and uses one of the handset function keys to activate it. For example the default for my Lenz decoders is F3 for yard mode and CV58 selects which function key is assigned. Cheers Paul Link to post Share on other sites More sharing options...
Nigelcliffe Posted September 15, 2017 Share Posted September 15, 2017 No doubt someone will come back with the calcs based on feet per second and length of a typical coach and words that prove scale doesnt matter as the length of the coach and speed on track varies according to scale but the time is a constant ratio. There are issues which individuals have to decide for themselves, such as: Most model railways are compressed in length, very few people model things to dead-scale lengths. So, how long should it take to a train to pass through the length-compressed scene ? If running at "scale speed" the train gets through the scene quicker than the prototype. Some modellers operate to a timetable with a "fast clock", either explicitly ticking away, or implicit (timetable takes 2hrs to run, but represents a day's traffic). How fast should the trains run to be correct with such time keeping in operation ? Answers on a postcard please, to "Number 1 Rule Applies, My Model Railway, The Fat Controller's House, Island of Sodor. " Link to post Share on other sites More sharing options...
Crosland Posted September 15, 2017 Share Posted September 15, 2017 Scale time, anyone? Link to post Share on other sites More sharing options...
RMweb Gold BoD Posted September 15, 2017 RMweb Gold Share Posted September 15, 2017 Scale time, anyone? So a new scale based on 1:60. What should we call it? And what gauge should we use? Link to post Share on other sites More sharing options...
DCB Posted September 16, 2017 Share Posted September 16, 2017 I saw an instant speed calculator - using coach lengths. 1 & 1/2 coach lengths passing in 1 second is equivalent to 60 MPH in any scale. No doubt someone will come back with the calcs based on feet per second and length of a typical coach and words that prove scale doesnt matter as the length of the coach and speed on track varies according to scale but the time is a constant ratio. Rob The calculation was based on the 64 foot Mk 1 and Mk 2 coaches which are 67 feet overall with buffers extended or about 66 feet with buck eye couplers in use. 66 feet is 22 yards, is one chain, and is 1/80th of a mile. 4 X Mk1s are 1/20th of a mile long and will take 1/20th of a minute or 3 secs to pass by at 60 mph. I wrote out a chart based on this and extrapolated it to cover speeds from 5 to 120mph in various increments, and further extended it for 12 ft wheelbase wagons and often carry a copy to exhibitions and preserved railways. Usually at exhibitions kids run at scale speed and the oldies run trains ludicrously slowly. What matters to me is the rotational speed of the wheels of steam engines (and Gronks), if you run scale speed with coupled wheels it will look right. Bogie Diesels are different they give no clue as to wheel rotation speed Preserved railways run passenger trains at the same speed unfitted goods and mineral trains ran pre 1968, Back to the Gronk, Don't forget that the 08 had a maximum speed of about 18mph - scaled down, that is about 4" per second in 1:76 scale - less than the length of the loco. I think the 08 was 15 Mph max but agree around 4" sec maximum. But the Gronk was very much an exception, 204 hp 03/04 diesels and even 1880 vintage industrial 0-6-0T steam locos could run at twice that. Link to post Share on other sites More sharing options...
RAF96 Posted September 16, 2017 Share Posted September 16, 2017 (edited) Scale time, anyone? If we could do this then stuff like model water flow and rolling stock rocking across dodgy track would look real instead of like on those old silent movies. And I wouldn't be as old. Rob Edited September 16, 2017 by RAFHAAA96 Link to post Share on other sites More sharing options...
w124bob Posted September 24, 2017 Share Posted September 24, 2017 The max speed of an 08 depends on how close to opening or closing time it is. Link to post Share on other sites More sharing options...
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