[HELP] Question... XL vs L

[Beck]

Hi everyone,

Currently I am working on an 8258 sized truck (will upload pictures soon), and was wondering which motor (XL vs L) would be better suited for driving such vehicle. I am have a two speed gearbox with ratios of: 1st: 1:1.5 and 2nd: 1:1.8. Any advice is appreciated!

[Saberwing40k]

I'd go with an XL motor, although a ratio of only 1:1.8 would make the truck awfully fast, so I'd recommend that you put a 3:1 gear ratio after the gearbox. Actually, with your gearbox, you're gearing up, making the output spin faster than the input, whereas with a truck you want the output to be slower than the input. That will give you more torque, and make the truck move better.

[Kiwi_Builder]

It depends on how much space you have and in what places.

I tell you this because I am working on a semi-RC 10x6 tractor unit with truck mounted crane and stabilizers, this means that I don't have enough space in the centre of the chassis to install an XL motor, but I do have the space to add two L motors on each side of the chassis and hard wire them together. If space isn't an issue and if you only have one L motor then go for the XL motor but if you have two L motors I would recommend them over a single XL motor having found that the performance of this truck is actually better with two L motors, with more torque and higher speed while still staying easily maneuverable.

[Jurss]

As i remember, XL has ~2 times more torque, but ~2x less RPM than L.