Originally Posted by adamge
What impossible hurdle prevents 7.4v from being usable in 12th scale?
You probably would need to run a 14-16 turn motor instead of a 10-12 turn motor, but you're right, I don't necessarily see the voltage as an issue. I wonder if you could regulate the voltage in some way like you can with A123 cells and limit it to 6V or so for 12th scale. Of course, policing the regulator could be a pain for a sanctioning body...
The other interesting limitation to Lipos is their weight.... I can't imagine how a 12th scale car would handle with nearly 4oz of weight taken off of it...could be scarry
There also isn't a lot of room in a 12th scale to add the weight back...could be interesting...
In my offroad cars, the weight issue is much more pronouced. My B4, T4 and XXX-CR all push like crazy since I started using them because of the loss of 6oz over the nose and middle of the cars. Even when adding weight back (if you can accomplish this..it's hard to get 6oz to fit!) handling can be an issue. I may get an X-6 conversion as a result, or get a Tamiya 501X or Yokomo 4WD that has the motor in the middle and a saddle pack at the rear (I would get the Maxamps saddle lipo for that application...although I wouldn't like the softer shell of these packs..
I wish Orion wouldn't wait for ROAR or other sanctioning bodies to legalize Lipos before they develop these different forms of packs, since other manufactures are making money filling in the configruation gaps and since they introduced their current lipo packs without ROAR approval in the first place...
). You can always get the rear to hook up, but elimiating push is a different matter.
From what I've seen, the on road touring cars don't seem to have as many issues regarding the weight of the lipo packs.. I may have to add some back on my new Evo V, but I haven't heard of any issues. Also Losi and Schumacher have made cars that have been specifically designed to accomidate lipos as well as nimhs and I assume they have been tested for the proper handling characteristics with each type /weight of battery.
I think nimhs when at their optimum performace can outperform a lipo powered car because a lot of cars are designed around the nihms shape and weight, and lipo racers may have trouble finding spots to add weight in the optimal positions. I think the voltage adavantage nimhs possess at the start of a race may not make much difference if you like to run a few warmup laps...that adavantage may get burned up some before the race even begins.
Still, now that a few manufactures are making cars specifically around lipos, the gap could narrow or even favor the lipo car depending on weight allowances in classes..... but I'm not sure if one form fo battery is purely better than the other at the moment...
Personally, I'm a club racer and like the Orion 4800s I have a bunch...I got so tired of replacing bad nimh cells ever 2 months and having to buy 3 packs every 3 or 4 months... I also like the fact that I don't need to worry about getting the battery peaked at just the right time right before the next heat and discharging it /matching it, etc... I just top them off after each race and
do other things...takes a lot of stress out of the racing experience
I have a 12th scale car, but It's going to be on the shelf for a while because I really don't want to go back to nimhs again. If they made nimhs that were more durable and less expensive, I wouldn't mind going back... but they're just a hassle right now as is... I just got a Darkside 10th scale pan car that I'll race instead...using a 4800 lipo down the center of the car..should be fun