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Dr. Rog
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Joined: 30 Dec 2008
Posts: 491
Location: Kingsclere
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 Posted: Wed Aug 26, 2009 9:40 pm Post subject: Heavy Haulage low-loader |
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This is my low-loader, built several years ago specially for STIA where I displayed it with two TEs pulling and a Mamod loco as load.
I believe I was inspired at the Great Dorset Steam Fair. 
I have now disassembled it because it was a bit heavy and the way I mounted the wheels gave too much friction. I hope to rebuild it narrower, lighter and with Mamod wheels.
Any comments or examples I should follow?
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Dr. Rog |
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Wallace
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Joined: 19 Jul 2006
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Location: New South Wales, Australia
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Bugsy
Steam Legend!!
Joined: 28 Jan 2009
Posts: 3143
Location: Sala, Sweden
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| Posted: Thu Aug 27, 2009 10:14 am Post subject: |
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I think it looked great the way it was.
Pity you took it apart, couldn't you find the cause of the friction?
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Si fractum non sit, noli id reficere. |
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Graham-Jilly
Steam Legend!!
Joined: 04 Mar 2007
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Location: Brisbane Qld Australia
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| Posted: Thu Aug 27, 2009 10:19 am Post subject: |
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looks great love it
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Dr. Rog
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Location: Kingsclere
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| Posted: Thu Aug 27, 2009 8:48 pm Post subject: |
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| Bugsy wrote: | I think it looked great the way it was.
Pity you took it apart, couldn't you find the cause of the friction? |
Thank you for the kind comment.
Meccano is for building and taking apart, I need the space!
The friction was due to axles running directly in normal holes, so there is a small contact area which tends to displace oil. Mamod wheels have a long journal with plenty of area to hold a hydrodynamic wedge of oil. they are also infinitely stronger than these plastic wheels.
Also I had to lock the outer wheels on, which means they fight each other. the combination is just a little too much.
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Les
Steam Supreme Being
Joined: 03 Nov 2007
Posts: 17551
Location: Bournemouth, Dorset, England.
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| Posted: Sat Aug 29, 2009 9:20 pm Post subject: |
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That looked great and I am looking forward to seeing version #2.
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DouglasC
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Joined: 21 Apr 2009
Posts: 28
Location: Scotland
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| Posted: Sat Aug 29, 2009 11:13 pm Post subject: |
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Sounds like you need a better way of providing bearings for your axles.
You could try using a bush wheel pn 24b. You can use the hole where the grub screw normally goes to apply oil.
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Dr. Rog
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Location: Kingsclere
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| Posted: Sun Aug 30, 2009 8:21 pm Post subject: |
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| DouglasC wrote: | Sounds like you need a better way of providing bearings for your axles.
You could try using a bush wheel pn 24b. You can use the hole where the grub screw normally goes to apply oil. |
Thanks Douglas, I have used such an arrangement before, however it can be difficult to get right. Basically the longer the bearing the more critical the alignment. With my rather battered Meccano getting two faces perfectly parallel is pretty much impossible.
However here is Mk II:
You will note that I have used 5 X 7 flanged plates between the frames rather than 5 x 11, so the width is more appropriate.
The tank and truck kept my 7yr old son happy while I considered trailer perfection.
This feels as if it rolls better, I think I must have got the wheels on too tight with MkI. That said the Army wheels have crowned treads so run very well on hard surfaces. 
My main problem is the rear end, I need a good prototype to serve as an example. 
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Burnmafingers
Full member
Joined: 27 Jul 2009
Posts: 854
Location: Devon UK
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| Posted: Fri Sep 04, 2009 8:58 pm Post subject: |
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Ooooh, one of the military kits  i spent many a happy hour playing with mine as a kid! Mum and Dad cleared their loft out a couple of months back and gave it to me and it is now buried in my garage. seeing that picture will spur me on to dig it out!
[/quote]
Both transporters look great BTW. |
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Dr. Rog
Junior Member
Joined: 30 Dec 2008
Posts: 491
Location: Kingsclere
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| Posted: Sun Sep 06, 2009 5:03 pm Post subject: |
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There is two Military kits in the picture, one made the tank the other the truck.
I too had one as a kid, and bought another on ebay recently for about £14, good value as it was complete and there is quite a lot of parts in it. I also got some extra wheels.
The wheels are available new for about a £ each. So never pay too much.
Keeping to thread here are some pics from the Great Dorset Steam Faire.
Both these prototypes are impressive, but probably too big for my needs 
I still need a more modest example to base my model on.
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Dr. Rog |
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