Direct to Diff Redcat Updates

[sikeston34m]

How hard does it accelerate?

[BL_RV0]

let us know how that fan works.

[lincpimp]

Originally Posted by sikeston34m

How hard does it accelerate?

Very Hard!!!!

If you punch it from a standstill it takes off spinning the tires violently, and then usually torques the chassis and unloads both tires on one side and then spins out, sometimes flipping over. Once the tires warm up the grip much better and that helps. It is not slow at all, must be near 40mph, need to radar it when I charge the battery again.

[sikeston34m]

Originally Posted by lincpimp

Very Hard!!!!

If you punch it from a standstill it takes off spinning the tires violently, and then usually torques the chassis and unloads both tires on one side and then spins out, sometimes flipping over. Once the tires warm up the grip much better and that helps. It is not slow at all, must be near 40mph, need to radar it when I charge the battery again.

There has been some concern expressed in the past about "spool up" time when using outrunner motors. How would you describe the AXI's "spool up" time?

Can you get us a video sometime?

I thought you might be pleased with that motor.

[lincpimp]

Ahh "spool up time"

I will say that it does not spool up as fast as an inrunner with a transmission. Now I will also say that I do not have any experience with a direct to diff setup using an inrunner. I will say that my experiences running an align 600 l and xl thru a stock emaxx tranny on 5s was different than a similar inrunner setup. The align had tons of power, but it did accelerae more smoothly, and slightly slower. Still emough rpm to brake the tires loose and wheely, but not as violent as a similar kv inrunner with the same batts, gearing, etc.

The axi in the redcat can still light up the tires till 20mph or so and has enough rpm to flip it over if the tires get loose and it slides sideways. I may try a monster 125 and 4s 5000 20c batts with some taller tires and see how the startup is. The taller tires should make the motor work harder and the 125 and 5k batts should be able to provide the necessary current if the motor needs alot to get moving. Performance on 5s is great, but I would like to run a taller tire and if I stick with 5s it will be geared for almost 60mph, which is a bit much.

[sikeston34m]

Originally Posted by lincpimp

Ahh "spool up time"

I will say that it does not spool up as fast as an inrunner with a transmission. Now I will also say that I do not have any experience with a direct to diff setup using an inrunner. I will say that my experiences running an align 600 l and xl thru a stock emaxx tranny on 5s was different than a similar inrunner setup. The align had tons of power, but it did accelerae more smoothly, and slightly slower. Still emough rpm to brake the tires loose and wheely, but not as violent as a similar kv inrunner with the same batts, gearing, etc.

The axi in the redcat can still light up the tires till 20mph or so and has enough rpm to flip it over if the tires get loose and it slides sideways. I may try a monster 125 and 4s 5000 20c batts with some taller tires and see how the startup is. The taller tires should make the motor work harder and the 125 and 5k batts should be able to provide the necessary current if the motor needs alot to get moving. Performance on 5s is great, but I would like to run a taller tire and if I stick with 5s it will be geared for almost 60mph, which is a bit much.

The outrunner has plenty of torque to push it geared for 60mph. When you do tire/battery changes, let the starting behavior show you the limits.

With the Revo, I have noticed if I "blip" it to about 1/4 throttle just for an instant, then back off, it starts great.

It doesn't seem to like trying to start with that first small step on the trigger.

Aaah, Rain, Rain, go away. I wanna take my Revo outside and Play.

[lincpimp]

Originally Posted by sikeston34m

The outrunner has plenty of torque to push it geared for 60mph. When you do tire/battery changes, let the starting behavior show you the limits.

With the Revo, I have noticed if I "blip" it to about 1/4 throttle just for an instant, then back off, it starts great.

It doesn't seem to like trying to start with that first small step on the trigger.

Aaah, Rain, Rain, go away. I wanna take my Revo outside and Play.

I noticed the same thing with my outrunner setups, a quick blip gets it moving and as long as it is rolling small throttle inputs work fine. I wish the quark had an adjustable throttle curve like the mm. You could give the curve a sharp rise at the beginning and then level it out again. I think that would given the motor enough "kick" to get it moving. Just ordered a fan for the axi and when that comes in I will rearranege the chassis so that the battery can lay flat. I will also try larger tires before I do anything and see how that works.

I know what you mean about rain, it rained here yesterday and it is so nasty and humid outside now.

[sikeston34m]

Can you get us a Video when the weather gets perty?