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update 13/6
Old 06-13-2018, 10:32 AM   #241
johann mor
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Default update 13/6

This is my 10th attempt to post this update, it sucks.

I now have 10 complete wheels, ready to have their polyurethane tyres cast on, 10 oil seal housings and 10 end caps. I am currently machining the shafts that go between the radius arms and the wheels, hopefully by the end of the week the radius arms will be finished and ready for assembly into the hull.


Jon
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Old 06-14-2018, 01:27 AM   #242
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Stellar job!
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Old 06-14-2018, 05:31 PM   #243
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Amazing work, quite incredible,
Reminds me of an old 80`s film John Carpenters the Thing when Blair builds his own space ship in the sub basement

Not taking the mick, I do think its great
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Old 06-14-2018, 05:35 PM   #244
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Outstanding work!!! I am amazed at the ability and skill you have to build this and the intensity of the project.
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Old 06-14-2018, 06:03 PM   #245
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Hello, Jon!
Jon, in this arrangement, the polyurethane sticks to the rim of the wheel securely?
Usually under the cover rubber bondage make the notch on the rim.





Similarly, the T-60

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Old 06-15-2018, 02:57 AM   #246
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Morning Alex,

You are correct and that is why I have only put large tack welds rather than seem welding the rim edges in place and a tall rim edge. In the mists of time, when I was young and worked in a machine shop, we were given a regular job turning the old rubber tyres off of fork lift truck wheels and the ribbed effect is one of the features of these wheels that intrigued me. The reason given by the manufacturer was that it stopped the rubber moving sideways off of the wheel rim and that the increased surface contact stopped the rubber rotating on the rim. My wheels are not solid, so this method was not a practical option. To stop the side ways movement, I am relying on the tall rim edges and the bonding of the polyurethane around the long tack welds should stop the rotational concerns. And yes, they will be shot blast prior to
the bonding process.

Jon
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Old 06-15-2018, 03:06 AM   #247
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Hopefully there won't be much in the way of a lateral force that would try to push the tyre off to the side anyway and hopefully the guidehorns would help keep the tyre where it should be as well. I did wonder if drilling a few holes around the rim would help anchor the polyurethane?
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Old 06-15-2018, 03:23 PM   #248
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Jon, I would still not discount the experience of previous generations.
In the photo, burned in 1941, Soviet tanks. Light BT and medium T-34. Pay attention to the support wheels. All the same longitudinal scars.





probably did it for a reason.
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Old 06-15-2018, 03:50 PM   #249
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The load on the chassis components need to be considered in the dynamics. The most difficult mode is a high-speed turn on the spot. The lateral load on the support wheel bandage is very large.
To rely on the high edges of the rim, very rash, in my opinion.
See what happens to the crawler belt when the crawler turns in place.



Just as it happens with the wheel of a car on a turn.



And this is a tracked all-terrain vehicle weighing 1 ton. The width of its track chain is 1.5 times greater than on your tank. And still bends inside
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Old 06-15-2018, 04:07 PM   #250
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I always try to learn for others but sometimes you have to follow your own path and hopefully my tank will not catch fire.

10 completed radius arms and one fitted just to see what it looks like. I will be visiting the tank museum in August to get some more dimensions, so I am going to have a break from the project and see how much I can achieve on my Morris and maybe ill be back in September.

Thanks for now,



Jon
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Old 06-15-2018, 04:12 PM   #251
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Comparing apples with pears - your vehicles move much faster than this Panzer II...

Quote:
Originally Posted by Alex1967 View Post
The load on the chassis components need to be considered in the dynamics. The most difficult mode is a high-speed turn on the spot. The lateral load on the support wheel bandage is very large.
To rely on the high edges of the rim, very rash, in my opinion.
See what happens to the crawler belt when the crawler turns in place.



Just as it happens with the wheel of a car on a turn.



And this is a tracked all-terrain vehicle weighing 1 ton. The width of its track chain is 1.5 times greater than on your tank. And still bends inside
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Old 06-15-2018, 05:24 PM   #252
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Gran Sasso, the laws of physics are the same for Apple and pear. This small tracked vehicle is no suspension of the wheels and moves with a maximum speed of 30 km/h On the freeze frame shows the moment of rotation, the speed is not more than the PZ-II.

Jon, no one can stop a man from stepping on his rake. We can only warn against this.
Nothing prevents you from attaching electric welding through the holes of 2-3 steel strips, rolled on rollers. For the probability of separation of bandages greatly reduced. I would not like to redo again such a difficult work.



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Old 06-30-2018, 11:22 AM   #253
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Jon, I think you'd like to see this.

https://www.youtube.com/watch?v=QNOt...ature=youtu.be
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