Originally Posted by Local racer
I don't think making the jump to lipo is the way to go,if you look at touring car the cost has not been reduced as they said it would.The constant change in the lipo battery's are the same as nickel metal.
I have seen guys at my local track go thru for lipos this season and at 80 dollars a pop that's very expensive.
If you care for your nickel metal cells they will last a good long time.
and this is not an attack towards you, but a number of us old timers in the industry get insulted when we hear that "if you care for your nickel metal cells they will last a long time". Who the hell has time to baby sit NiMH...
For the consumer who wants to "race" RC, the current providers of NiMH's are screwing us with crap products as their cells remain the weakest link. On my post above, #153, I just discarded over $1000 worth of NiMH batteries ranging from 3300-4600 (2+ year time period). The fact that I just purchased 4x 4600 packs during the summer and left them "NEW" in the box until November to build and they failed to take a charge is a disgrace. Where's the abuse in that...
When Sanyo left the market, electric racing took a downturn. Overtime, people are getting sick of having to deal with cells that fail or lack in performance unless you "take care of them". Hence the reason why fuel racing has remained popular, off-road is thriving (driving is the equalizer) and Lipo's will rule the electric on-road racing.
The fact that my Lipo wired transmitter still had 11.8v available after sitting since the summer makes life easier to focus on the aspect of racing and all thats fun with this hobby.
I went on the website for these NiMh "providers" (I won't use their name as they are only repackagers and not the manufacturers - so its not right to bash them on this forum) and "some" have a reasonable return policy. So long any cell that fails is returned with a receipt that reflects the pack was purchased within the past 30 days.
So they know that the cells deteriorate over time and will not take a charge if sitting too long at either the distributor and/or the LHS.
With Lipo's you do not have this risk...I wish ROAR's electric committee would resolve the issue for 1/12th scalers so we can be done with NiMH's once and for all. Years ago, we use to race 6-cell 1/12th scale, 4-cell introduced only because 8-minute of run time was the issue. Not to slow the cars down.
IMO: If a 2s 17.5 1/12th scale is too fast for some indoor tracks, than us racers have the option to (i) use a slower motor, (ii) drive within control...and throttle back, or (iii) turn throttle endpoints down to drive at a speed we can control and slowly build up to higher speeds.
Years ago we were forced to have to "throttle drive" to manage our battery power and finish a race. We benefited by learning throttle control and we had reserve power if/when we wanted to make a pass.
R/C racing is becoming like restrictor plate racing....and what's the fun it that....
I still fail to see how Lipo's cost more in the long term. The voltage is monitored at the start of each race, so the need to purchase a higher capacity Lipo to enhance the voltage output over the discharge curve yields marginal benefits. Today's Lipo capacity has enough mah to handle our race periods without a noticeable difference in voltage over the discharge period. Now if ROAR increases a race period to 10 minutes than mah will become an issue.
I know guys using a 1year old Lipo pack in their TC without the need to change it. They all rave about the fact they've not purchase NiMh in over a year. Sounds like they're saving money.
I'm please to hear my local track has taken a position on the use of Lipo's for 1/12th scales. The fact that I will never have to waste a dollar on NiMH's is awesome.