7.4V li-poly eeeemmmmmaaaaarrrrroooootooooooo
Posted: Wed Apr 13, 2005 11:14 pm
I've been meaning to do a car like this for a while. The trouble of finding the right set of li-poly batteries to fit the dimensions of the battery holders was the main design challange I faced. In the end I did find some batteries and I have now a working chassis.
This mr02 smokes! lol....
In the pic below you can see the setup in it's pre-racing, "just wired up" state.

Sitting right up the front is my new Nelly Deluxe turbo, yum! The motor is one of my Plasmatomics (of course!), running with neo magnets for now. 24AWG silicon wire all the way around. You might think it quite thin for the application, but it works a treat.
My first set of li-poly batts I tried were based on set of ETEC HP 450mah batts. These had some good dimensions but are a tad long for the chassis so I needed to move the hplate into the middle notch in the chassis. Given that this is a MM chassis I will need to do some hacking to fit a shell on it. So far it's running naked! lol....
In the pic below you can see how I dremeled out the battery compartments.


Here's the current ETEC batteries, like my "saddle" pack? lol...

Since Nelly deluxe regulates the power to 5V for the RX, both the signal wires and the 5V wires are routed to the RX PCB through a small, rectangular hole in the front. The li-poly pack connects directly to Nelly Deluxe using some dean's micro plugs. The motor is connected directly to Nelly.

To swap out the batteries all I do is remove the oil shock from the motor side and swivel it off to the side. The batteries come out quite easily.
Here's some more pics showing the setup.



So far I haven't had much of a chance to try it out. I've got it running a 6t pinion at the moment. Needless to say that even with the 6t I have no room to really open it up and it's raining today.... arghhh....
On the speedchecker I'm getting 45kph with a 6t and plasmatomic (neo config). That's petty good considering that the same setup with 4 cells yields 29kph. It's a 50% increase in speed basically. It's also VERY light, given that the li-poly is a lot lighter than 4 AAA cells.
Anyways, that's enough for now. I'll get some video when I can, you won't be dissapointed, lol...
The next step is to get my other Powerquest 600mah lipo's going. These lipo's will be just sweet for this setup. They are shorter and will enable me to use a stock mr02 chassis without any mods and then I can use the stock battery covers to hold the buggers in.
I also need a ball diff, a proper motor mount(PN racing or Atomic alloy MM). I hate using spacers to get a fine gear mesh. The screw mounting method of the atomic and pn racing MM mounts is superior for fine tuning that mesh.
Stay tuned!
Expect Nelly deluxe within the woahnelly.com shop soon!
ph2t.
This mr02 smokes! lol....
In the pic below you can see the setup in it's pre-racing, "just wired up" state.
Sitting right up the front is my new Nelly Deluxe turbo, yum! The motor is one of my Plasmatomics (of course!), running with neo magnets for now. 24AWG silicon wire all the way around. You might think it quite thin for the application, but it works a treat.
My first set of li-poly batts I tried were based on set of ETEC HP 450mah batts. These had some good dimensions but are a tad long for the chassis so I needed to move the hplate into the middle notch in the chassis. Given that this is a MM chassis I will need to do some hacking to fit a shell on it. So far it's running naked! lol....
In the pic below you can see how I dremeled out the battery compartments.
Here's the current ETEC batteries, like my "saddle" pack? lol...
Since Nelly deluxe regulates the power to 5V for the RX, both the signal wires and the 5V wires are routed to the RX PCB through a small, rectangular hole in the front. The li-poly pack connects directly to Nelly Deluxe using some dean's micro plugs. The motor is connected directly to Nelly.
To swap out the batteries all I do is remove the oil shock from the motor side and swivel it off to the side. The batteries come out quite easily.
Here's some more pics showing the setup.
So far I haven't had much of a chance to try it out. I've got it running a 6t pinion at the moment. Needless to say that even with the 6t I have no room to really open it up and it's raining today.... arghhh....
On the speedchecker I'm getting 45kph with a 6t and plasmatomic (neo config). That's petty good considering that the same setup with 4 cells yields 29kph. It's a 50% increase in speed basically. It's also VERY light, given that the li-poly is a lot lighter than 4 AAA cells.
Anyways, that's enough for now. I'll get some video when I can, you won't be dissapointed, lol...
The next step is to get my other Powerquest 600mah lipo's going. These lipo's will be just sweet for this setup. They are shorter and will enable me to use a stock mr02 chassis without any mods and then I can use the stock battery covers to hold the buggers in.
I also need a ball diff, a proper motor mount(PN racing or Atomic alloy MM). I hate using spacers to get a fine gear mesh. The screw mounting method of the atomic and pn racing MM mounts is superior for fine tuning that mesh.
Stay tuned!
Expect Nelly deluxe within the woahnelly.com shop soon!
ph2t.