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Originally Posted by X5 Addict
(Post 4515920)
For some reason I thought you stated it, but my mistake:( I am dosed up to the eyeballs with flu medication, the world is spinning....:confused::sweat:
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Originally Posted by mharlow
(Post 4515933)
Legalising Lipos would not have any effect on people still using Nimh's. Nimh's will still be more than competitive in most if not all cases (if you had used Lipos you would know this). All it will do is make it cheaper for people once there current Nimh need replacing. They may well choose to stay with Nimh but at least they would have a choice. By the way your cells you got late last year are already obsolete haven't you seen the 4600 Nimh's.
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The word "invest" and RC don't go together.;)
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Where do we stop?
Easiest way to stop the battery issues is to go NITRO!;):sneaky::lol:
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Personally I am not sure WHERE electric racing is going...
We have Lipo's becoming available yet in a lot of European racing the move is to 5 cell EVERYTHING... I was speaking to a guy from Germany a few weeks ago and they have 5 cell 540 over there!!!... where does Lipo fit into classes like that? I have always been someone thats said "lets have longer races"... we've had the technology to do so now for many years... what we don't have, as a majority, is the right attitude... its always been about going as fast as possible (in ANY class) for 5 minutes (some clubs 6) and thats all that matters to most.. My last "point" is the limitation of Lipo... at the moment it seems to be 3.7v per cell is the norm... not sure why, maybe one of the battery experts can explain how the chemistry etc sets that limit... which makes them totally useless for any class that uses 4 cells, 5 cells etc... I think that will need addressing at some stage... But thats just what I think :sneaky: |
Originally Posted by ShadowAu
(Post 4516853)
My last "point" is the limitation of Lipo... at the moment it seems to be 3.7v per cell is the norm... not sure why, maybe one of the battery experts can explain how the chemistry etc sets that limit... which makes them totally useless for any class that uses 4 cells, 5 cells etc... I think that will need addressing at some stage...
But thats just what I think :sneaky: |
If you like a 1.1V (approx 25%) disadvantage:p
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Originally Posted by X5 Addict
(Post 4516895)
If you like a 1.1V (approx 25%) disadvantage:p
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Originally Posted by ShadowAu
(Post 4516971)
Exactly... 4 cell = 4.8v with a peak charge approx 5.4v or so... no way even the flattest discharging Lipo can ever overcome that
once you actually run lipo competitively you discover that you have to go down winds in the motor to make up for the difference in battery voltage I reckon if 1/12th you could both in a 2.5 brushless with 1C 6000mAh lipo and it would be on the money. |
When will it stop
Will it stop ,I dought it.:rolleyes:
They could stop reducing the car weight.That may make the cells easier to make reliable as they could be heavier.But that aint guna happen its driven by manufacurers of top end cars the lighter the car needs to be the more they can charge. They could limit the amps of batt but that wont work manufactures would just under rate their cells. Lipo is already super seeded our shop has allready got Lithium Mangenese Batts ,a slightly safer cell than polymers. Nano phosphate cells are out there as well. Ive had NiMH cells for 2 years what are you guys doing to them :lol: Dont get me started on brushless:lol: |
Originally Posted by X5 Addict
(Post 4516895)
If you like a 1.1V (approx 25%) disadvantage:p
Originally Posted by mharlow
(Post 4516871)
3.7v Lipo in 4 cell racing would be useable you would just need to use the appropriate motor.
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Originally Posted by Radio Active
(Post 4517656)
Ok, so my club currently runs 4 cell 1/12th scale Stock, where does that leave us? (I believe that this is common in other parts of the world as well)
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Ok, getting back to the original question, Where do we stop??
Being a person that has been involved in RC racing for over 20 years, this is a question that I have often asked.. I remember the "good ole days" where you were a god if you had a pack of "Sanyo Yellows" and the speed of your car, or the gear ratio you used was governed by being able to finish your 6 min race. Thankfully, the worry of dumping before you finished is now a thing of the past. Progress, technology, development, evolution, call it what you like, but this is what has happened here.. It's that continual need for the racer to gain some form of an advantage over his / her competitors that does it, and it doesnt matter how small that advantage is, or how great the cost.. Unfortunately it is the majority of the racers that are not at the pointy end of the stick that are now starting to feel the cost of this, especially when it comes to batteries. IMO, at some point this evolution will have to stop, and hopefully it will before it kills the hobby.. (or everyone converts over to Nitro) Radio Active, remember that nothing in life is free. When we charge a NiCd / NiMh battery (and I assume LiPo is the same), that we must put more capacity into the pack, than what we can expect to ever get back out of it.. So if we charge a NiMh pack at 1C, it will take approx 80Mins (not 60Mins) to reach full charge.. TIME.. is one area that LiPo should be an advantage (given that you dont need to discharge before recharge) in that you will only need to "top-up" the battery after each race.. |
Originally Posted by mharlow
(Post 4517793)
Make stock 19 turn/Brushless 10.5 problem solved you still then have your spec class.
How do you feel that making stock a 19turn / 10.5 BL class will solve the voltage difference when comparing 4x NiMh cells (4.8V nominal) to 1x LiPo cell (3.7V nominal)?? |
Originally Posted by StumpyRC
(Post 4517829)
I dont understand..
How do you feel that making stock a 19turn / 10.5 BL class will solve the voltage difference when comparing 4x NiMh cells (4.8V nominal) to 1x LiPo cell (3.7V nominal)?? |
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