geared motor

[Lil Giants]

So the motor you have pictured is 10RPM? Multiply 3.75 axle ratio = 37.5RPM

2nd gear was a little slow on the junk 740, so maybe you got it right with a bit faster ratio & .7 inch taller tire. Those tires RC4WD too? (I would assume so) very thin side walls, the tires will squat alot without packing adding.

The hinge looks much better, how well it will work will depend on how sharp you turn. Perhaps with your front axle so far ahead of the hinge, you won't need to many degrees angle to turn sharply.

[rc4ever]

Thanks lilgiants,
So, do u think the 40rpm output speed geared motor will work? About the tires I have no luck to find a better n harder foam to handle the weight! Do u have any suggestion?

[RCP57]

Wouldn't a 10 rpm gear motor driving an axle with a 3.75-1 gear ratio give you an output of about 2.6rpm?

I purchased some foam from an automotive upolstry shop and made my own inserts with it. It looks a little like carpet underlay but it's 2 inches thick. It works out great in my Euclid. I can haul a car battery in the box now and the tires stay put with no glue but it still has a little give for traction while empty. I can take a picture of the foam for you if you like.

Reg

[rc4ever]

Thanks reg, I'm more than happy to c the pic of the foam! please post it n tell me where to buy it? About the geared motor, what do u recommend? I've seen many of them on eBay but unsure which one I should go for
Thanks in advance
Leon

[Lil Giants]

Originally Posted by RCP57

Wouldn't a 10 rpm gear motor driving an axle with a 3.75-1 gear ratio give you an output of about 2.6rpm?

Reg

You're right! I don't know what I was thinking?! I should have divided, not multiply.

You'd need atleast 120rpm to achieve 32rpm wheel speed... 140rpm would be just over 37rpm.

[RCP57]

Here are the pics of the foam that I bought. It cost me $15 for this piece so it's not that expensive. I used a bandsaw to cut the outside and a razor blade for the inside.

I think Joe is right about the rpm of the gear motor you need. Personally I wouldn't buy anything that was over 200rpm or it will be pretty fast. My skidder for example has 152rpm motors with a 2.6-1 axle and 7 3/4" tall tires and the speed it quite good.

Reg