A sprung Class 24 or an exercise in ignorance and persistence...
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
So, having temporarily fitted the gear towers and the secondary springs, we now have a bouncy Class 24
I have to say that I've always been a little sceptical about springing - I have half a dozen sprung wagons and, on my small layout at least, I cannot tell the difference between them and the rigid wagons when running along but this is a whole different ballgame, even just pushing the loco along, it feels so different to a loco that has just had a wheel conversion in a rigid chassis. Whilst this revelation is great for running qualities, I can't see it being good for my wallet as I'm not going to want to spring all my locos.
John
I have to say that I've always been a little sceptical about springing - I have half a dozen sprung wagons and, on my small layout at least, I cannot tell the difference between them and the rigid wagons when running along but this is a whole different ballgame, even just pushing the loco along, it feels so different to a loco that has just had a wheel conversion in a rigid chassis. Whilst this revelation is great for running qualities, I can't see it being good for my wallet as I'm not going to want to spring all my locos.
John
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
I can't see it being good for my wallet as I'm not going to want to spring all my locos.
I think you meant:-
I can't see it being good for my wallet as I'm now going to want to spring all my locos.
Regards
Resisting but just got my third Penbits kit.
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
Thanks for that Keith, you are, of course, correct.
As this one has, so far, gone so well, I'll definitely be picking one up for the Bachmann 47 which, as you well know, has wobbly bogies...
John
As this one has, so far, gone so well, I'll definitely be picking one up for the Bachmann 47 which, as you well know, has wobbly bogies...
John
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
John, it does get addictive!
I think the class 24/5 kit is a great place to start! The others look more complex but are just the same but with a few extra parts!
I think the class 24/5 kit is a great place to start! The others look more complex but are just the same but with a few extra parts!
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
Looks like you've enjoyed it!
Ian's design and instructions are excellent - some other manufacturers could learn a thing or two from these...
Ian's design and instructions are excellent - some other manufacturers could learn a thing or two from these...
Re: A sprung Class 24 or an exercise in ignorance and persistence...
What did you do about pick-ups? I assume that the Bachmann ones have to be discarded.
DT
DT
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
David Thorpe wrote:What did you do about pick-ups? I assume that the Bachmann ones have to be discarded.
They do indeed - the instructions cover this well. Far better than most kits!
I chose to use the 'American' system, so one bogie picks up on one side, and the other on the other.
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
David Thorpe wrote:What did you do about pick-ups? I assume that the Bachmann ones have to be discarded.
DT
Not got that far yet but, as James says, there are full instructions...
John
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
jameswells83 wrote:David Thorpe wrote:What did you do about pick-ups? I assume that the Bachmann ones have to be discarded.
They do indeed - the instructions cover this well. Far better than most kits!
I chose to use the 'American' system, so one bogie picks up on one side, and the other on the other.
FWIW; I understand what you mean by the terminology but all the North American diesels I've owned for at least the past 40 years have picked up from all wheels on both bogies.
Cheers,
David
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
David Knight wrote:jameswells83 wrote:David Thorpe wrote:What did you do about pick-ups? I assume that the Bachmann ones have to be discarded.
They do indeed - the instructions cover this well. Far better than most kits!
I chose to use the 'American' system, so one bogie picks up on one side, and the other on the other.
FWIW; I understand what you mean by the terminology but all the North American diesels I've owned for at least the past 40 years have picked up from all wheels on both bogies.
Cheers,
David
The "American style" pickup system is called that because it's what is used in imported brass steam engines. Pickup from one rail is from the locomotive, the other rail is picked up by the tender.
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
garethashenden wrote:The "American style" pickup system is called that because it's what is used in imported brass steam engines. Pickup from one rail is from the locomotive, the other rail is picked up by the tender.
That's it - the instructions do refer "the 'American' system of pickup". In this case, rather than split over loco and tender, it is each bogie.
http://www.penbits.co.uk/Content/KitDoc ... ckups.html
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
As I wait for a few supplies to arrive to finish the chassis, I've started work on the body and, so far, I've removed the rain strips from the centre of the roof as they sit far to high up the roof and need to be replaced with microstrip, removed a vent from the roof and filled in the body side steps.
Next up to correct is the grille in the centre of the roof and the large triangles on the body sides...
John
Next up to correct is the grille in the centre of the roof and the large triangles on the body sides...
John
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
John, didn't know if these notes from when I was doing one of my class 24s may be of use?
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
Cheers James.
John
John
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
Glad to be of help - hope you can read my writing!
You've already on the main job with the roof, the rainstrips - they do make a big difference!
You've already on the main job with the roof, the rainstrips - they do make a big difference!
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
You very kindly sent me some other notes via email a couple of years ago. I noticed on your model you opened up the bottom door of the battery charger compartment which was so typical of the 24s that ran on the line and I'm doing the same.
What I didn't realise until someone told me today is that, on the new SLW 24, the panel is removeable and the battery chargers are modelled behind the panel...
John
What I didn't realise until someone told me today is that, on the new SLW 24, the panel is removeable and the battery chargers are modelled behind the panel...
John
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
Work is progressing on the chassis and I've got the pickups fitted but I've hit a bit of a snag...
The wheels turn perfectly in their bearings and, when the bearings are slotted in to their guides, the wheels turn and the bogie can be pushed along with no problems at all. Clip the wheels in to the Bachmann drive unit and turn the drive shaft and the wheels revolve with no resistance at all.
However, if I then fit everything together like so:
Then all the freedom has gone and the driveshaft takes quite some force to turn the wheels...
John
The wheels turn perfectly in their bearings and, when the bearings are slotted in to their guides, the wheels turn and the bogie can be pushed along with no problems at all. Clip the wheels in to the Bachmann drive unit and turn the drive shaft and the wheels revolve with no resistance at all.
However, if I then fit everything together like so:
Then all the freedom has gone and the driveshaft takes quite some force to turn the wheels...
John
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
John,
It may just be a matter of distortion in the image but the two sides of the tower supporting the worm gear appear to be splayed out ever so slightly. Is there an added bit in this picture that's not there when you have the wheels in the straight Bachmann drive?
Cheers,
David
It may just be a matter of distortion in the image but the two sides of the tower supporting the worm gear appear to be splayed out ever so slightly. Is there an added bit in this picture that's not there when you have the wheels in the straight Bachmann drive?
Cheers,
David
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
Have you checked it with all parts except the worm? You need to make sure the axles are free to rock slightly so the springs can do their thing and this involves opening out the Bachmann bearings a bit and checking everything is free, and its easier to check without the worm in place allowing all the gears to turn.
Regards
Regards
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
Thanks gents.
Having looked at it further, the bearing guides are now very stiff in their slots so I'm guessing the the axle holes on the Bachmann mouldings are not lining up exactly with the bearing guides on the PE bogie so it looks like some fettling might be required.
John
Having looked at it further, the bearing guides are now very stiff in their slots so I'm guessing the the axle holes on the Bachmann mouldings are not lining up exactly with the bearing guides on the PE bogie so it looks like some fettling might be required.
John
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
Hi John,
My guess would be a mismatch between the axle locations of the drive unit and the subframe. Before you open out the bearings any more, I notice that you have not removed the clips from each end of the drive unit. Are these bearing on the end transoms of the brass subframe? - there should be some daylight between them and the ends of the drive unit, and lack of same might be shifting the axle locations.
HTH
Ian
My guess would be a mismatch between the axle locations of the drive unit and the subframe. Before you open out the bearings any more, I notice that you have not removed the clips from each end of the drive unit. Are these bearing on the end transoms of the brass subframe? - there should be some daylight between them and the ends of the drive unit, and lack of same might be shifting the axle locations.
HTH
Ian
Ian
PenBits Model Railways - Diesel bogie springing and detailing
PenBits Model Railways - Diesel bogie springing and detailing
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
Thanks Ian, I hadn't noticed that. I've removed them and it's made no difference, the Bachmann bearings have, as per your instructions, been opened out to 2.1mm so I guess I'm going to have to fettle the bearing slots...
John
John
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
Check the fit of the drive unit and wheelsets into the subframe without the springs first - just in case it's not a wheelbase mismatch.
Cheers
Cheers
Ian
PenBits Model Railways - Diesel bogie springing and detailing
PenBits Model Railways - Diesel bogie springing and detailing
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Re: A sprung Class 24 or an exercise in ignorance and persistence...
Thanks again for the suggestions, a very slight easement of the bearing and their slots has solved the problem.
John
John
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