JMRCA change touring rule to 4cells! Is this the future?
#91
Tech Adept
Originally Posted by EddieO
They blew apart.....why, cause the designs can't take the stuff we subject them to........and IFMAR ( I don't blame ROAR for this) decided it was best to not allow any of the motors the top brushless companies were making in (hacker, etc) under the rules....
The Novak's don't blow up much, but they thermal.....the LRP/REEDY units.....they just explode......probably before they can thermal...
Later EddieO
The Novak's don't blow up much, but they thermal.....the LRP/REEDY units.....they just explode......probably before they can thermal...
Later EddieO
It just does not make any sense. But you can see from all the posts on RCTECH, the BL/LiPo wave is getting stronger whether or not ROAR, IFMAR or any other governing body wants to acknowledge it.
I don't understand the resistance to embrace new technology. I could go on...but I won't.
Thanks,
Matt
#92
Originally Posted by mpetrich
I don't understand the resistance to embrace new technology.
#93
Tech Adept
Originally Posted by JKA
Safety and subsequent liability?
Plus, I don't really see an insurance carrier asking a race director if they allow BL and LiPo's.
Thanks,
Matt
#94
Originally Posted by mpetrich
Please explain. From what I have seen, I think there is more of a safety issue with a car hitting someone (full throttle, no failsafe) then with a motor or battery pack blowing up.
#95
Tech Adept
I can't understand the 4 cell idea .. 5 will be much much better .. you dont have to have a receiver pack.. you still have less tire wear .. less batteries needed.. It will be cheaper to run, but still fast enough.. So 5 batteries with 27t 19t and mod (7 or 8t.. whatever)..
-Hugo
-Hugo
#96
Originally Posted by hugovdb
I can't understand the 4 cell idea .. 5 will be much much better .. you dont have to have a receiver pack.. you still have less tire wear .. less batteries needed.. It will be cheaper to run, but still fast enough.. So 5 batteries with 27t 19t and mod (7 or 8t.. whatever)..
-Hugo
-Hugo
One example of how 5 cells will not affect the outcome is this past years IFMAR offroad electric world championships when a 5 cell buggy won the title.
#97
Now what is the future? Are we aiming on brushed motors or brushless. Most brushless can be programmed through the computer. I have read somewhere that is impossible for some racers to race with speeds over 100km/u. What about nitro onroad cars most of them easily can achieve 100 km/u even the 1/10 cars. It takes practice. I run myself a 1/8scale hydroplane with speeds over 120km/u, Although it needs a lot of concentration it takes practice (and of course a lot of water ) I think the tracks has to be redesigned. We run now mostly technical tracks but if it has longer straights the only problem will be the cooling. What about the introduction of the new LIPO's. Orion is now offering 7.4V packs what about them? Will they come with 4.8V or 5.0V packs?
#98
Tech Elite
iTrader: (6)
One example of how 5 cells will not affect the outcome is this past years IFMAR offroad electric world championships when a 5 cell buggy won the title.
Mr. Unlimited,
a single lipoly cell puts out 3.7 volts so 7.4 is two cells in series. the next step down in lipo would be way under 4 cells of NiMH.
Safety and subsequent liability?
#99
Getting a pack blown up in your face is no walk in the park. I know several guys whos packs have exploded and sent shrappnel flying towards me. It hurts
#100
Originally Posted by kufman
We are not really talking about the lowest traction, crappiest offroad track ever built here. we are talking about high traction, onroad, with 4wd.
Originally Posted by kufman
Mr. Unlimited,
a single lipoly cell puts out 3.7 volts so 7.4 is two cells in series. the next step down in lipo would be way under 4 cells of NiMH.
a single lipoly cell puts out 3.7 volts so 7.4 is two cells in series. the next step down in lipo would be way under 4 cells of NiMH.
Please do not take me wrong, I acept every view on this, for I am just trying to understand better why people keep wanting more power(is evident because Lipo is rated at a higher voltage and people like its rip due to that extra little voltage) when 15 years ago we dropped from 7 cells down to 6 cells.
#101
Originally Posted by kufman
Everything is dangerous, even NiMH and NiCAD's, much less a gallon of alocohol with nitro in it. I have seen 3300's blow up and it isn't pretty.
I'm not saying Lipo's won't or shouldn't be the future of electric RC. I'm just trying to add some perspective to the lack of acceptance so many people rant about.
#102
Tech Elite
iTrader: (6)
What depicks the reason the Lipo Battery must be built with a certain voltage. Could the Lipo Industry change what the starting voltage of a lipo cell from 3.7 to say 3.0?
#103
[QUOTE=kufman]Mr. Unlimited,
a single lipoly cell puts out 3.7 volts so 7.4 is two cells in series. the next step down in lipo would be way under 4 cells of NiMH.
QUOTE]
I know but also Lipo's can be redesigned. Let's say they develop 2,5V Lipo's. A pack would be 5V. Now JMRA accepts this rule who says IFMAR, EFRA, ROAR will follow? In Europe we've always sticked to 6cells while in the USA many yrs ago offroad was racing 7cells. IFMAR didn't allow 7cells for world champions, so let's wait.
a single lipoly cell puts out 3.7 volts so 7.4 is two cells in series. the next step down in lipo would be way under 4 cells of NiMH.
QUOTE]
I know but also Lipo's can be redesigned. Let's say they develop 2,5V Lipo's. A pack would be 5V. Now JMRA accepts this rule who says IFMAR, EFRA, ROAR will follow? In Europe we've always sticked to 6cells while in the USA many yrs ago offroad was racing 7cells. IFMAR didn't allow 7cells for world champions, so let's wait.