RMweb Premium cctransuk Posted July 24, 2013 RMweb Premium Share Posted July 24, 2013 A couple of years ago I measured the diameter of the wheels on a CCT at the Bodmin Raillway, and they were 3 foot 3 inches ..... .... or 1.0 m. Given that the BR CCT and GUV were developed in parallel with the ferry versions, perhaps the metric diameter of the wheels is significant!? Link to post Share on other sites More sharing options...
Combe Martin Posted July 24, 2013 Share Posted July 24, 2013 My point though, is that unless the CCT that I measured isn't typical, all those modellers that are rewheeling their Lima/Hornby CCTs with 14mm wheels are using the wrong size. Link to post Share on other sites More sharing options...
mark54 Posted July 24, 2013 Share Posted July 24, 2013 The wheel diameter is quoted as 3'6" in the 1986 BR NPCCS diagram book. The wheels of the one you measured at Bodmin may have been very worn. Mark Link to post Share on other sites More sharing options...
RMweb Premium cctransuk Posted July 24, 2013 RMweb Premium Share Posted July 24, 2013 The wheel diameter is quoted as 3'6" in the 1986 BR NPCCS diagram book. The wheels of the one you measured at Bodmin may have been very worn. Mark Also - where you measure the wheel diameter is critical. Remember, the wheel tread is coned and the diameter should be measured, I believe, at the flange root. Regards, John Isherwood. Link to post Share on other sites More sharing options...
Bob Reid Posted July 24, 2013 Share Posted July 24, 2013 No John, the nominal wheel diameter is measured in the middle of the tread and always has been. The size 3'-6" as Mark states is the correct size for a new Mk1 CCT wheel. Link to post Share on other sites More sharing options...
Combe Martin Posted July 24, 2013 Share Posted July 24, 2013 I accept the wheels may well have been worn, but would it be by as much as 1.5 inches off the radius ??, and again, yes the wheel tread is coned, but it's very slight ! Link to post Share on other sites More sharing options...
Bob Reid Posted July 25, 2013 Share Posted July 25, 2013 Sounds like they are at scrapping size (or past it)! By the old BR "standard" of the day for coaching stock on "tyred" wheelsets, there was a difference between new and scrapping diameter of about 2 1/4" i.e from new at 3'-6" down to 3'-3 3/4* so in scale any wheel from 13.25mm to 14mm could, if following prototype practice, be fitted (in reality there were/are many other reasons that wheelsets were scrapped and some before the wheel had reached the scrapping size) You have to bear in mind though model manufacturers use the nominal 'New' size i.e. 14mm as a datum at which they set the 3'-5 1/2" buffer height, so altering one would (just like the real thing) have an effect on the other, which would need compensating for..... Stick with 14mm and you can't go wrong.... If you wanted realism of course you could get them turned down but I'd say that's taking it a bit far! Link to post Share on other sites More sharing options...
LNERGE Posted February 1, 2015 Share Posted February 1, 2015 I've had a good look through the net looking for information on the lighting in CCT's. I've currently got one going over the workbench getting new couplings and a renumber. I intend to fit pickups to the wheels and a resistor between them for the benefit of my track circuits. It's only a small step further to install a light or two. Would the lighting be left on during the journey if it had been switched on? I have a photo taken somewhere of 94242 in line for firing at Snailwell and when i fiddled with the lighting switch the lights came on... Link to post Share on other sites More sharing options...
45125 Posted February 1, 2015 Share Posted February 1, 2015 I've had a good look through the net looking for information on the lighting in CCT's. I've currently got one going over the workbench getting new couplings and a renumber. I intend to fit pickups to the wheels and a resistor between them for the benefit of my track circuits. It's only a small step further to install a light or two. Would the lighting be left on during the journey if it had been switched on? I have a photo taken somewhere of 94242 in line for firing at Snailwell and when i fiddled with the lighting switch the lights came on... Generally the lighting would be turned off whilst in motion, the lighting was provided for loading/unloading.. the lighting was pretty poor but you could see what was what, unlike the earlier vans. Al Taylor. Link to post Share on other sites More sharing options...
LNERGE Posted February 1, 2015 Share Posted February 1, 2015 Probably just the resistor then. Quick and easy. Link to post Share on other sites More sharing options...
Down_Under Posted July 7, 2015 Share Posted July 7, 2015 Are Bill Bedford Heavy Plate Sprung W-Irons suitable for use as replacement W-Irons on these coaches? (https://www.eileensemporium.com/index.php?page=shop.product_details&flypage=eny_fly_default.tpl&product_id=5757&category_id=288&option=com_virtuemart&Itemid=9) Will they take 14mm wheels? And then a combination of MJT or scratch built springs and dampers? I ask, as it is not so easy to get in contact with ABS or make white metal ones over in Ozzie. Are the prototype slightly deeper in section to take account of the deeper wheels? Thanks in advance, J Link to post Share on other sites More sharing options...
RMweb Premium cctransuk Posted July 7, 2015 RMweb Premium Share Posted July 7, 2015 Are Bill Bedford Heavy Plate Sprung W-Irons suitable for use as replacement W-Irons on these coaches? (https://www.eileensemporium.com/index.php?page=shop.product_details&flypage=eny_fly_default.tpl&product_id=5757&category_id=288&option=com_virtuemart&Itemid=9) Will they take 14mm wheels? And then a combination of MJT or scratch built springs and dampers? I ask, as it is not so easy to get in contact with ABS or make white metal ones over in Ozzie. Are the prototype slightly deeper in section to take account of the deeper wheels? Thanks in advance, J I'm not aware of a etched plate axleguard for 14mm. wheels, but I have to concede that getting anything from ABS has become an exercise in itself ! Regards, John Isherwood. Link to post Share on other sites More sharing options...
Down_Under Posted July 9, 2015 Share Posted July 9, 2015 I know that comet(now Wizard) make a w iron that takes 14mm wheels, but it is the RCH style rather than the plate type. Have to have a play with parts.... Does anyone have a diagram to measure the height of the w iron? From bottom of the w iron to the bottom of the chassis rail? Link to post Share on other sites More sharing options...
Ravenser Posted July 9, 2015 Share Posted July 9, 2015 I know I used someone's etched heavy duty W-irons for mine, but I've forgotten who exactly Link to post Share on other sites More sharing options...
Ravenser Posted July 9, 2015 Share Posted July 9, 2015 It was MJT. Should be reasonably readily available then Link to post Share on other sites More sharing options...
Fat Controller Posted July 10, 2015 Share Posted July 10, 2015 It was MJT. Should be reasonably readily available then http://www.dartcastings.co.uk/mjt.php Link to post Share on other sites More sharing options...
RMweb Premium cctransuk Posted July 10, 2015 RMweb Premium Share Posted July 10, 2015 It was MJT. Should be reasonably readily available then Did you manage to get 14mm. diameter wheels into the MJT plate axleguards? They are designed for 12mm. dia. wheels. Regards, John Isherwood. Link to post Share on other sites More sharing options...
Ravenser Posted July 12, 2015 Share Posted July 12, 2015 Did you manage to get 14mm. diameter wheels into the MJT plate axleguards? They are designed for 12mm. dia. wheels. Regards, John Isherwood. Sorry about the delayed response - I've only just seen this. Yes - Hornby carriage wheels were fitted. I know it was MJT because it's etched on the unit, but it looks like I used these, which are stated to take 14mm wheels http://www.dartcastings.co.uk/mjt/2297S.php Link to post Share on other sites More sharing options...
RMweb Premium cctransuk Posted July 12, 2015 RMweb Premium Share Posted July 12, 2015 Sorry about the delayed response - I've only just seen this. Yes - Hornby carriage wheels were fitted. I know it was MJT because it's etched on the unit, but it looks like I used these, which are stated to take 14mm wheels http://www.dartcastings.co.uk/mjt/2297S.php Spot on - a useful bit of info', thanks. Regards, John Isherwood. Link to post Share on other sites More sharing options...
Il Grifone Posted July 28, 2015 Share Posted July 28, 2015 I'm interested in this as I have a couple to do. On one, I've cut off and shortened Lima's axleguards and refitted them and then installed 14mm wheels with inside bearing, which is not 100% successful. The MJT W-irons look like the answer, but the instructions make no mention of 14mm wheels. I would think it is necessary to file the bearing holes 1mm upwards to set the vehicle ride height correctly, modifying the spring units to suit. Does anyone have any further thoughts on this? Link to post Share on other sites More sharing options...
RMweb Gold Enterprisingwestern Posted July 28, 2015 RMweb Gold Share Posted July 28, 2015 Current state of play with my bodgings using the body only and slinging the chassis. ABS underframe details, brass channel solebar, ABS axleguards with Bill Bedford springy bits, (not shown yet). Mike. Link to post Share on other sites More sharing options...
RMweb Premium PaulCheffus Posted July 28, 2015 RMweb Premium Share Posted July 28, 2015 7-20141013_181218.jpg 5-20141013_181134.jpg 4-20141013_181052.jpg 3-20141013_180929.jpg 1-20141013_180921.jpg Current state of play with my bodgings using the body only and slinging the chassis. ABS underframe details, brass channel solebar, ABS axleguards with Bill Bedford springy bits, (not shown yet). Mike. Hi I did something similar with the N Gauge version, 2mm SA parts and some Ultima Models left overs. Cheers Paul Link to post Share on other sites More sharing options...
Ravenser Posted July 28, 2015 Share Posted July 28, 2015 I didn't have to file or bodge my MJT etchings at all. Just remember when cutting down the ABS castings that for at least half the vehicle the coils on the end of the spring will be fixed to the solebar - so if they break off the spring as you cut down (as they probably will) it's not a problem: you reattach them when gluing the lot in place to the solebar Link to post Share on other sites More sharing options...
RMweb Gold Enterprisingwestern Posted July 30, 2015 RMweb Gold Share Posted July 30, 2015 For anyone interested, I have underframe pics available. Mike. Link to post Share on other sites More sharing options...
Down_Under Posted July 30, 2015 Share Posted July 30, 2015 7-20141013_181218.jpg 5-20141013_181134.jpg 4-20141013_181052.jpg 3-20141013_180929.jpg 1-20141013_180921.jpg Current state of play with my bodgings using the body only and slinging the chassis. ABS underframe details, brass channel solebar, ABS axleguards with Bill Bedford springy bits, (not shown yet). Mike. Hey Mike, thanks for sharing! What depth brass channel did you use? Interesting - didn't realize that ABS made all the other underframe parts also. Still getting round to ordering a bunch of parts from MJT. Link to post Share on other sites More sharing options...
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