Sweet Pea pony truck

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andyhigham
Elder Statesman

Posts: 2,803

Sweet Pea pony truck Apr 2, 2019 19:33:36 GMT

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Post by andyhigham on Apr 2, 2019 19:33:36 GMT

I am fitting a pony truck to my sweet pea. This is the truck (not mine, knicked off t'internet)
My brain keeps telling me there should be braces from just behind the pivot to the bottom of the horns. I like triangles

DSC07750-web by Sigma Projects, on Flickr

2-4-4 Baldwin B&SR No7 "Alice Nutter"
0-4-2 Sweet Pea "Manny Gardner"
2" minnie traction engine "Demdyke"
0-4-0 Narrow gauge "Chattox"
0-4-0 Quarry Hunslet (undecided on name)
0-4-0 Well tank Hunslet "Malkin Tower"
5" Darjeeling and Himalayan railway NDM6 "Alizon Device"
3" scale Foden steam lorry "Elizabeth Device"

JonL
Elder Statesman

WWSME (Wiltshire)

Posts: 2,906

Sweet Pea pony truck Apr 5, 2019 20:13:30 GMT

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Post by JonL on Apr 5, 2019 20:13:30 GMT

If its bearing forces are vertical from the axle then that piece from the pivot backwards is just to tow it along in the right ballpark anyway, isn't it? If it rolls nicely there should be minimal torque, but I guess cross bracing wouldn't hurt.

_____________________________________________________________________________________
3.5" Britannia "Derek Stokes" (my build)
3.5" William "Jamie" (1/2 built by me)
3.5" Doris (currently undergoing rebuild)
3.5" King (3/4 built by previous owner, being finished)
2" Burrell Gold Medal Compound
Various Stuart stationary steam engines