On-road BL project

[MetalMan]

Just to add this, the XL4200 and the MM 4600 motors should draw about the same current, the 4600 a slight bit more.
If you go by Feigao's turns, the 4600 could be like the loaded kv of a 7s.

The only way to get longer runtimes is to get batteries with higher capacity (Lipo) or go with higher voltage. For higher voltage, extra NiMh cells would add extra unnecessary weight - Lipo's the option for high voltage as well. For 6 NiMh cells, you're going to have a bit of a hard time coming by a motor that's powerful enough yet light enough at the same time - a Feigao 380C 6L would probably be the best choice for 380 motors (and that has a similar kv to the MM 4600 motor).

[BrianG]

Squee: Yeah, that's my E-Revo (v1) on Ebay. I like V2 much better so I'm keeping that one. Just curious, what is a good and fair price for something like that? The proceeds from this sale will be going to the purchase of a good Lithium charger and batteries for V2 Revo.

Batfish: I'm glad the tranny and diff is strong. Like the title says, it will be for on-road use only, so it won't be subjected to the same rigors as a normal MT or buggy. Once I get the roller and get a feel for its structural strength/weight/etc, I'll have a better idea if I want to go with 3s or 4s and then an appropriate motor. I know enough of BL to know the relationship be and power. I'm leaning to a slower turning motor at higher voltage, but that depends on the physical space on the truck and the weight.

MetalMan: Feigao's chart is what I'm using to get a rough idea of the kv vs turns ratio and therefore, current draw. I'm hoping that by using higher voltage and less vehicle weight, I can keep current draw to ~80A peaks with ~20A (or less) average current draw. I figure the E-Molis might be a good pick for this. I know and realize that e-molis drop voltage after 30A or so, and I'm actually counting on this a little to help keep the "punch" down a little on take-off to protect the drivetrain.

Thanks for the assistance! Once I get going with this project, I'll post back with my progress and pics...

[Batfish]

Originally Posted by BrianG

Batfish: I'm glad the tranny and diff is strong. Like the title says, it will be for on-road use only, so it won't be subjected to the same rigors as a normal MT or buggy. Once I get the roller and get a feel for its structural strength/weight/etc, I'll have a better idea if I want to go with 3s or 4s and then an appropriate motor. I know enough of BL to know the relationship be and power. I'm leaning to a slower turning motor at higher voltage, but that depends on the physical space on the truck and the weight.

Just keep in mind that on-road applications typically have much more traction than off-road. This extra traction can actually be more harmful to a drivetrain than slipping in the dirt off-road.

[BrianG]

Originally Posted by Batfish

Just keep in mind that on-road applications typically have much more traction than off-road. This extra traction can actually be more harmful to a drivetrain than slipping in the dirt off-road.

Good point.