140H Grader

[rc_farmer]

Originally Posted by JensR

Great to see you, Rob

As you mentioned the tires, maybe going a bit smaller with these?
http://store.rc4wd.com/Rock-Crusher-...res_p_730.html
Those are the popular 2.2" wheel size.

Next size up is Series 40 - with tire diameters of 200mm or more - so these would be too large.

Apart from that, maybe the traction could be improved a bit with more weight? I guess your wood construction is fairly lightweight?
If so, some people put lead or steel into the tires. I am a bit scared of lead's toxicity, so would look at different solutions first

Cheers
Jens

Contrare to belief about the weight, it is quite heavy, I estimate about 30 lbs at least. I have plastic BB's in the rear tires. I had them in the front, but turning was harder.....it just pushed the frontend. The other issue is the surface area of the tires. They are very flat and covers the entire foot print on the ground. There needs to be some hump in the tire. I will experiment with additional weight attached to the front.

[rc_farmer]

Guys and Gals, I can't say thank you enough for the kind words. I don't know what my next major endeavour may be as of yet.

Again thanks everyone.

[JensR]

Ah, good with the extra weight!

Yes, the tires are not known to be great performers...

I couldn't resist a bit of numbercrunching.

From

http://www.ritchiespecs.com/specific...&modelid=91709

I get the scale as:
width 2464/(13*25.4)=7.5
length 8713/(43*25.4)=8
height 3131/(15*25.4)=8.2

So, let's go with 1:8.

Then the rule of thumb for the weight would mean we should be looking at a weight of very roughly (models tend to be lighter almost always) 14677kg/8^3=29kg which would be about 65lbs!

Cheers
Jens

[sparkycuda]

Really a great model. Details and finish are awesome and it functions extremely well. I like the cab interior detailing the best because it is something that does not always get finished and you really hit it - including the color. Closeup pictures match the sales brochures!

Congratulations on a fine build!

Ken