RC Tank Warfare community hobby forum

It's possible that if you hollow out the tyre then it may stretch over the rim, so have a play with the scad.

Alwyn

Here's the hollowed out version
module tyre() {
$fn=100;
difference () {
union () {
translate ([0,0,-1.5])cylinder(15,34,34);
rotate_extrude (angle=45, convexity = 9) translate ([32,-0.5,-2.75]) circle (r=2);
rotate_extrude (angle=45, convexity = 9) translate ([32,12.5,-2.75]) circle (r=2);
difference () {
union () {
translate ([0,0,-2.5])cylinder(17,32,32);
translate ([0,0,-3])cylinder(18,27,27);
}

translate ([0,0,13.6])cylinder(1.5,20,25);
translate ([0,0,-3.1])cylinder(1.5,25,20);
}
}
translate ([0,0,-3])cylinder(18,17,17);
translate ([0,0,0.5])cylinder(11,26,26); // hollow out tyre
for (z = [0:12:360])rotate(a=(0)+z,v=[0,0,1])translate([28.8,0,-3]) cube ([6,3.5,8]);

for (z = [0:12:360])rotate(a=(30)+z,v=[0,0,1])translate([28.8,0,7]) cube ([6,3.5,8]);

}
difference () {
union () {
translate ([0,0,-0.5])cylinder(13,32,32);
rotate_extrude (angle=45, convexity = 9) translate ([30,0.5,-2.75]) circle (r=2);
rotate_extrude (angle=45, convexity = 9) translate ([30,11.5,-2.75]) circle (r=2);
}
translate ([0,0,-3])cylinder(18,17,17);
translate ([0,0,0.5])cylinder(14,20,20);
}

}
tyre ();



I think this version may go over the rim of the hub so long as you print using TPU

Alwyn

Does anyone know where Playmobile tyres can be bought?
I found that the heavy duty 51x24/1 fits nicely on the app truck rims.
I want a couple sets to stick on my road going GAZ hot rod truck.
Unless of course a Lego tyre is going to work.
Approx 50mm od and 17-24mm width.

Playmobil operate a spare parts service. It says to contact them for a quote.

Well, another motor thudded through the letterbox this morning.
So here we go, left to right...
STD setup
High torque Tamiya motor
Dual geared motors
Small block 200 rpm geared
BFO bigblock 750 rpm geared

The BFO bigblock is probably overkill, but I want my Hanomag to tow anything easily up to as scale speed of around 40kmh.
Cheers
Wayne


Sent from my iPhone using Tapatalk

The hanomag is gonna need metal axles with that big block haha

I haven't had a lot of time to work on the WC51 lately, but I have managed to get a few things done. Hopefully in the next video it will be moving under it's own power.



And here's what the tail lights look like, but I think different variants may have had only a single light on each side. More research required.



This variant has just one tail light per side.



Yeah, I know, we'll have to do that one, eh? I think I can do that top, too. Maybe. We shall see.

Thanks to Midlife for the photos

www.banggood.com
Expect to have the metal prop shafts in stock from April 1st 2018. They are priced at under £6 a pair.
Shaun.

I've found some reasonably priced TPU filament
https://www.ebay.co.uk/itm/NEW-Surreal- ... SwuUBanr9f

and ordered a reel, so I'll report back on how it works

Alwyn

Here's a slightly smaller tyre - 50x12mm, I'm working on it for my M9 trailer.




and here's the code - I've slightly hollowed the centre as I'm going to try printing with TPU

module tyre() {
$fn=100;
difference () {
union () {
translate ([0,0,-1.5])cylinder(10,24.5,24.5);
rotate_extrude (angle=45, convexity = 9) translate ([23,-1.5,-1.75]) circle (r=1.5);
rotate_extrude (angle=45, convexity = 9) translate ([23,9,-2.75]) circle (r=1.5);
for (z = [0:12:360])rotate(a=(0)+z,v=[0,0,1])translate([20.5,0,-3]) cube ([5,2.5,7]);
for (z = [0:12:360])rotate(a=(30)+z,v=[0,0,1])translate([20.5,0,3.5]) cube ([5,2.5,7]);
difference () {
union () {
translate ([0,0,-2.5])cylinder(13,23,23);
translate ([0,0,-3])cylinder(13,23,23);
}

translate ([0,0,9.1])cylinder(1.5,15,20);
translate ([0,0,-3.1])cylinder(1.5,20,15);
}
}
translate ([0,0,-3.1])cylinder(15,14,14);
translate ([0,0,0])cylinder(7.5,18,18);
}
}
tyre ();

The tyre centre is 30mm so it will need a redesigned hub if you want to use it for the WPL truck

Alwyn