Zach Bond "Momentum Van" project

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Old Man Aaron
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Re: Zach Bond "Momentum Van" project

Post by Old Man Aaron » Thu Dec 31, 2020 4:24 am

Soar Valley Light wrote:
Sat Dec 26, 2020 3:10 pm
Achieving at least some sort of scale speed and 'controlability' is crucial to me gaining any sort of satisfaction from model railways of any scale or gauge. It will need to look right or I will get brassed off.
Couldn't agree more. I'd sooner not have a loco, than an uncontrollable one. Looking forward to seeing what comes of your railway and zecar.

Incidentally, The original pair of Zecars I'd ordered from Kikkerland back in March 2020 never arrived, and after contacting them in August I'd still heard nothing. By November, I thought I'd make a last-ditch through the "contact us" page of their website. Not expecting a reply, I thought "dear this" then went to EvilBay, and bought another pair from someone else. Amazingly, a reply from Kikkerland was in my inbox the next day, and they promptly mailed out a replacement pair of Zecars free-of-charge - arriving from the US in a week, which was doubly impressive.

So, assuming the Evilbay pair actually arrive, (I'm a bit skeptical of this, as I've had several packages from the US go missing over 2020) my number of momentum wagons will in 2021, grow from one, to five! Assuming I can think of appropriate wagons in which to hide the Zecars.. So far, it's a tool wagon, a farmers' molasses tank wagon, and a small van from Swift16..

Regards,
Aaron
Last edited by Old Man Aaron on Wed May 12, 2021 4:53 am, edited 1 time in total.
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Aaron - Scum Class Works

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Re: Zach Bond "Momentum Van" project

Post by Lonsdaler » Tue May 11, 2021 10:14 pm

After I bought my first steam locomotive in 2014, I found Zach's article about the momentum van, and like many, I decided to have a go with a Zecar friction drive. I constructed a goods van freelance from plasticard, scored to give the plank effect, and scaled to suit the Zecar chassis (a bit squat and dumpy), fitted 25mm wheels in place of the supplied ones, and shortened the axles to fit within some dummy axleguards. This was the end result, from below
Image

And viewed side on
Image

I weighted the van with lead sheet to about 500 grams, and also applied some foam packing to the interior to try and reduce the awful whine which emanated from the drive. In trials, I found the results to be variable, and felt that the main problem was the short chassis length, which seemed to make the van work sometimes, but not others (someone earlier identified that the driven wheels need to be located at the locomotive end - not something I had considered when I ran my trial).
Eventually I replaced the Zecar with standard axles, and continue to use the van as a regular part of my stock.

Re-reading this thread a few weeks ago, I noticed that Simon Wood had combined 2 Zecars to make a momentum van, something that I had considered but taken no further when I decommissioned the Zecar unit from mine. Having acquired, some time ago, a goods van (I think an Andel models kit) which proved a poor runner, mainly due to the axle spacing on it and it's light weight, I began to consider a second attempt.

Having kept an eye on Zecars on Amazon over the intervening years, I noticed that prices (from a peak of nearly £30 a couple of years ago), were now more reasonable at about £12. I took the plunge and purchased another (having first made sure I still had the old one safely stored :scratch:).
Not for me the easy route of placing both devices in line, or angled so the undriven axle is within the body of the van. I decided to indulge in some bodgelling, attacked both carcasses with my Dremel, and then very skilfully cobbled the two surviving parts together with some brass plate and nuts and bolts. The axleguards are IP, and the axle stubs are retained in the brass bushes within the guards. so far, it all appears to be smooth running.
This is the stage I'm at at the moment - still to do is - install weighting, add foam insulation for noise suppression, refurbish and repaint. I'll update as it goes.
Image
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Re: Zach Bond "Momentum Van" project

Post by SimonWood » Thu May 13, 2021 4:18 pm

Lonsdaler wrote:
Tue May 11, 2021 10:14 pm
Re-reading this thread a few weeks ago, I noticed that Simon Wood had combined 2 Zecars to make a momentum van, something that I had considered but taken no further when I decommissioned the Zecar unit from mine. Having acquired, some time ago, a goods van (I think an Andel models kit) which proved a poor runner, mainly due to the axle spacing on it and it's light weight, I began to consider a second attempt.
Wow that's vastly neater than my effort! Mine is currently disassembled, to be rebuilt into a new wagon when the round tuits arrive, with a bit more thought on my part on designing in sufficient weight in the wagon. I'm also tempted to compare how a two flywheel wagon compares to a single flywheel wagon with "4WD" as it were... but since I haven't yet found time to rebuild the original wagon let alone construct a second, my findings are not going to be published for some considerable time...

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Re: Zach Bond "Momentum Van" project

Post by Lonsdaler » Thu May 13, 2021 6:20 pm

SimonWood wrote:
Thu May 13, 2021 4:18 pm

Wow that's vastly neater than my effort!
You're very kind Simon, but I think the camera angle disguises the bodgelling quite well! This is the unit ready to put into the van body, the two halves are connected by a brass strip either side. The carcase of the van is cleaned and ready to be repainted in GWLR colour(s) as soon as the weather pretends to be dry :roll:
Image
SimonWood wrote:
Thu May 13, 2021 4:18 pm
Mine is currently disassembled, to be rebuilt into a new wagon when the round tuits arrive, with a bit more thought on my part on designing in sufficient weight in the wagon. I'm also tempted to compare how a two flywheel wagon compares to a single flywheel wagon with "4WD" as it were... but since I haven't yet found time to rebuild the original wagon let alone construct a second, my findings are not going to be published for some considerable time...
As I intimated, I wasn't that impressed with a single mechanism and I'm still not convinced that this will be any better, but we shall see.
Phil

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Re: Zach Bond "Momentum Van" project

Post by Old Man Aaron » Sat May 15, 2021 2:41 am

Zecar or not, that's a very cute little van.

Looking forward to hearing how the second mechanism goes.
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Re: Zach Bond "Momentum Van" project

Post by FWLR » Sat May 15, 2021 9:03 am

Brilliant Phil, this is a future project for me. :thumbright:

I presume it is instead of slo-mo's, which I couldn't afford to get right now.
Rod

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Re: Zach Bond "Momentum Van" project

Post by Lonsdaler » Sat May 15, 2021 10:49 am

Old Man Aaron wrote:
Sat May 15, 2021 2:41 am
Zecar or not, that's a very cute little van.

Looking forward to hearing how the second mechanism goes.
Thanks Aaron, I like it to, which is why when I originally gave up on the single zecar, I kept it running with normal undercarriage :thumbup:
Phil

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Re: Zach Bond "Momentum Van" project

Post by Lonsdaler » Sat May 15, 2021 10:54 am

FWLR wrote:
Sat May 15, 2021 9:03 am
Brilliant Phil, this is a future project for me. :thumbright:

I presume it is instead of slo-mo's, which I couldn't afford to get right now.
This thread should demonstrate how easy it can be to do Rod, and you are more than capable of building a suitable waggon for it, so go for it.
And yes, it is in effect trying to replicate the impact of a Slomo.
Not only are the Slomo's expensive, it appears that it's very much a one man band. It's a shame a larger enterprise isn't interested in taking it on and offering a broader range to suit more engines, but it is what it is :dontknow:
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Re: Zach Bond "Momentum Van" project

Post by Old Man Aaron » Tue Sep 14, 2021 2:56 pm

Finally got round to starting another much-needed momentum van. Stole Garethh's idea to drive via delrin chain, had to pry the mech apart to fit the sprocket. The IP Eng. axle needed a knurl on it before the ⅛" sprocket would stay put - a drop of superglue was used too, though I doubt it's efficacy with delrin. Fitting the chain was a sh*t, won't be removing that one for painting..

This wagon will be a molasses tank, made to look as if it were converted from a cane truck - will look far more at home on a rake of cane trucks, than my guard's van. The tank (when I bother doing it) will be made of styrene to a boxy, riveted design, and likely fitted with captive nuts, so it's removable to allow repair or replacement of the Zecar mech if needed. Those ugly M2.5 nuts on the solebars will eventually be hidden by steps.

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Image
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Re: Zach Bond "Momentum Van" project

Post by philipy » Tue Sep 14, 2021 3:18 pm

Looking good so far Aaron

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Re: Zach Bond "Momentum Van" project

Post by Lonsdaler » Tue Sep 14, 2021 11:13 pm

Old Man Aaron wrote:
Tue Sep 14, 2021 2:56 pm
Finally got round to starting another much-needed momentum van. Stole Garethh's idea to drive via delrin chain, had to pry the mech apart to fit the sprocket. The IP Eng. axle needed a knurl on it before the ⅛" sprocket would stay put - a drop of superglue was used too, though I doubt it's efficacy with delrin. Fitting the chain was a sh*t, won't be removing that one for painting..

This wagon will be a molasses tank, made to look as if it were converted from a cane truck - will look far more at home on a rake of cane trucks, than my guard's van. The tank (when I bother doing it) will be made of styrene to a boxy, riveted design, and likely fitted with captive nuts, so it's removable to allow repair or replacement of the Zecar mech if needed. Those ugly M2.5 nuts on the solebars will eventually be hidden by steps.

Image

Image
Looking good so far Aaron. don't forget some sound insulation. Mine is still a noisy old bird - I need to think about different insulating media rather than the sponge type foam I've used - I have some sound deadening foam left over from a project I've done on my van. I think I'll try that and see if it's more effective. :thumbleft:
Phil

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