Forum Discussion
Groover
Mar 09, 2021Explorer II
RoyJ wrote:Reisender wrote:
Plus, downtown deliveries with Electric heavy trucks will have much less impact on down town air quality. As cities outlaw vehicles with tail pipes in downtown cores trucks like these will have an advantage as no depot action is required switching between a diesel tractor and an electric tractor. Win win. Everybody likes good air quality.
No doubt at all about that. All in-town applications, from food delivery to Translink, should be EVs.
I just think high hp long haul applications would be the last frontier for EVs, and it will be conquered, just more in the future.
Here's another way of looking at it: most of our newer city busses are hybrids now, but you'll never see it on tour coaches (Prevost, MCI, etc.) Because there's very little opportunity for energy re-capture at high speeds.
I've driven 50k lbs loaded Prevosts from Calgary and back many times, and used the jakes maybe once the whole trip (8% section on the Coq). All other times it's nearly foot to the floor (430hp Detroit).
I have never seen a Prevost struggling to get up even the steepest hills. That would lead me to believe that they have a lot of throttle left on level ground.
But, let's just say that you are right and it does take 400hp to move a Prevost. That would take around 20 gallons per hour meaning that they only get about 3mpg. I found this statement online: "As a result, the average fleet-wide fuel economy of the trucks in the study was 7.28 mpg in 2017, up from 7.14 in 2016."
That indicates that semis use a lot less power than your Prevost does and I would guess that they are much heavier too. Add in regenerative braking and better streamlining then allow for other drags on the fuel economy of semis like idling and engines not well maintained and I believe that you would see mpg go up quite bit more.
Another factor is that I have not seen a Tesla shown with a bull guard or any trailer other than a streamlined box trailer. Open trailers like car haulers probably do suck up more power than box trailers do.
Maybe you just have a bad engine. I have heard others complain about the Detroit diesel being fuel guzzling weeklings. You would think that a 7 figure motorhome would come with an engine that could both climb hills and pass a few gas stations.
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