Forum Discussion
azrving wrote:
Didn’t think whole electric thing start because of global warming and resource depletion? How is this type of thing saving the planet? Not that I'm a global warming nut but wth. How would anyone associated with an RV be concerned about all this electric stuff anyway? Surely it’s not out of a concern of resource depletion or GW. If anyone is worried about that skip the RV stuff and stay home. That would be much greener, right?
It does seem that the EV industry tends to lean toward development of expensive playthings rather than affordable, practical transportation.- I suspect they are using some sort of a servo motor or a hybrid DC motor and they can have maximum torque at zero RPM. Many factory automation machines have those types of motors.
- It will be interesting to see some real owners reporting back on how these electric trucks and SUV'S do in the real world of towing, especially distance such as a cross country trip.
- Might be a bit hard on tires.
Groover wrote:
With completely different gear ratios between ICE engines and electric motors torque has become an irrelevant number. What we need to know is what the motive effort is at the ground under specific circumstances. Even on ICE engines we need to be clear whether torque multiplication from the torque converter would be factored into that.
This is not a new concept, farm tractors and train engines have been rated that way for over 100 years.
"Electric motors have maximum torque coming off zero rpm. That is why the Tesla is fast in the 1/4 mile."
Tesla acceleration is also due to AWD with very effective torque management that is very difficult to replicate with an ICE engine.
What is crazy is some developing plug in elec hybrids with transmissions. Nothing like going through the effort and not using the most useful aspect of the electric motor.- With completely different gear ratios between ICE engines and electric motors torque has become an irrelevant number. What we need to know is what the motive effort is at the ground under specific circumstances. Even on ICE engines we need to be clear whether torque multiplication from the torque converter would be factored into that.
This is not a new concept, farm tractors and train engines have been rated that way for over 100 years.
"Electric motors have maximum torque coming off zero rpm. That is why the Tesla is fast in the 1/4 mile."
Tesla acceleration is also due to AWD with very effective torque management that is very difficult to replicate with an ICE engine. Me Again wrote:
ShinerBock wrote:
Why Hummer's Massive Torque Number in Super Bowl Ad Is Misleading
What Does the Hummer EV's 11,500 LB-FT of Torque Actually Mean?
Based on how they are calculating this, my 2014 Ram 2500 with it's 1,270 lb-ft coming from the engine on my highest tune sends 14,034 lb ft to the rear wheels in first gear going by the actual gearing calculation, but it is actually more than that since since the torque converter multiplies torque coming out of the engine. On my "tow" tune, it sends 12,045 lb-ft to the rear wheels not accounting for torque multiplication.
Electric motors have maximum torque coming off zero rpm. That is why the Tesla is fast in the 1/4 mile.
I know that. I am just commenting on how they are coming up with this 11,500 lb-ft number. It is very misleading, but then again it is GM. I wonder if Huntindog will comment on whether these numbers are "certified" or not?ShinerBock wrote:
Why Hummer's Massive Torque Number in Super Bowl Ad Is Misleading
What Does the Hummer EV's 11,500 LB-FT of Torque Actually Mean?
Based on how they are calculating this, my 2014 Ram 2500 with it's 1,270 lb-ft coming from the engine on my highest tune sends 14,034 lb ft to the rear wheels in first gear going by the actual gearing calculation, but it is actually more than that since since the torque converter multiplies torque coming out of the engine. On my "tow" tune, it sends 12,045 lb-ft to the rear wheels not accounting for torque multiplication.
Electric motors have maximum torque coming off zero rpm. That is why the Tesla is fast in the 1/4 mile.- Why Hummer's Massive Torque Number in Super Bowl Ad Is Misleading
What Does the Hummer EV's 11,500 LB-FT of Torque Actually Mean?
Based on how they are calculating this, my 2014 Ram 2500 with it's 1,270 lb-ft coming from the engine on my highest tune sends 14,034 lb ft to the rear wheels in first gear going by the actual gearing calculation, but it is actually more than that since since the torque converter multiplies torque coming out of the engine. On my "tow" tune, it sends 12,045 lb-ft to the rear wheels not accounting for torque multiplication.
