electric car and transport, wire news

[Christophe]

the aerodynamic jaws of this truck makes me laugh, it's not before it happens but behind!

...

I think inflatable tail could be useful to a lot of vehicles, not just trucks

Quite ... I think of this idea of ​​inflatable pointed tail since I'm paragliding ... without ever having had the courage to put myself in the calculations ... estmation gain in SCx and therefore consumptions .. .Implementing the idea ...

And I fear that the idea is dead born because of various approvals ... and road safety ..

Imagine extra space by truck? At least 5 m ...

But the idea deserves a subject alone! Because aerodynamically it's exciting ... and there are lighter alternatives ...

[chatelot16]

an inflatable tail of 5m is negligible if one respects the safety distance from 50m to 90km / h

it deserves to open a subject!

a long time ago that I want to go to the realization

1) mount it on a citroen C35: more expensive than a model but easier to measure the result

2) make a model that circulates on rail ... more economical in materials than on a real vehicle but much more complicated to make measurements ... without forgetting that the more the model is small more it must advance quickly

3) simulation with solidworks ... it's the easiest way to get a result without any production costs ... I had this idea of ​​an inflatable tail a very long time ago, and there was no accessible simulation software ... 5 years ago I had the opportunity to use the aerodynamic simulation of solidworks, but did not think to use it for that ... it's a good idea of ​​talking about it on this forum

[Christophe]

I do not understand the problem too well because for thermal vehicles it is the same: we almost never reach "normalized" consumption ... there is always 20 or 30% more (being careful ... if not much more)

Electric cars are less enduring than promised

According to Test-Achats, several models of consumer electric cars have a significant deficit between advertised endurance and that observed in real circulation, report Le Soir and De Standaard Monday. Three cars tested by the consumer association are 40% less enduring than promised.

Placed under real traffic conditions, both the Renault Zoe, the Nissan Leaf and the Opel Ampera have a true range of only 58% of that announced for sale.

"This scientifically demonstrates what some specialists suspected," writes Test-Achats. “The real autonomy of electric vehicles is between 80% and 50% (in the event of driving on expressways or difficult weather) of the autonomy announced in cycle NEDC”.

This "New European Driving Cycle" is the laboratory energy performance test procedure to which vehicles are subjected and which therefore no longer seems to stick to reality. Test-Achats requires that the tests be carried out in real conditions and therefore in principle provide much more reliable results.

http://www.levif.be/actualite/auto/les- ... 61607.html

[Remundo]

all serious people know that NEDC is not at all realistic.

and the Lithium with the cold, it is very bad household, perso I have + 30% of conso between the 0 ° C and 25 ° C, without heating of course!

[Grelinette]

There have been several recent announcements on the first electric agricultural tractors, including a French one!

Given the power required for agricultural work, I have often heard the manufacturers of tractors of known brands say that electric agricultural tractors are not ready to be developed ... but the first are on the market! They are not as powerful as their gasoline and diesel counterparts but they are lighter and the technologies will now evolve quickly.

https://www.terre-net.fr/materiel-agric ... 32456.html


http://www.agriavis.com/news-9496-%2523 ... ique+.html


one again : https://youtu.be/Vh9N13iwlug

[chatelot16]

lithium batteries are very bad at low temperature, and moreover they do not heat ... so you have to heat them ... it does not require a great power if it is thermally insulated ... but we must also think about summer and not overheat, so thermal insulation more ventilation it opens in summer

electric tractor? little hope of success because the main interest of electric cars is to replace the road tax heavily taxed by electricity slightly taxed ... as the tractor uses less taxed fuel oil that diesel reduces the economic interest

however a large number of agricultural tractor and used with low autonomy, with very frequent return to the farm, so it would be enough battery easily interchangeable to work all day

main problem, I'm not sure that electric motorization is a good solution for the CO2 given the high energy gray battery manufacturing ... the electric motor is a good solution to reduce the pollution of the air in city centers ... but the tractors do not drive in the city centers ... so it is not the agricultural tractor the first machine to electrify

that we start by electrifying the buses of the big cities ... as long as all the buses are not electric it is not necessary to speak to me of other electric gear!

[Did67]

There are certainly, frequent returns ...

But in addition, an agricultural tractor (there, these are vineyards or green spaces), it is 15 l / h of diesel for heavy work (plowing ...) So 150 l of diesel onboard. Or the equivalent of 1 500 kWh .... Even if the electrical efficiency is much better, it's huge. Let's say 600 kwh electric mini to ship. One zoe is 40 batteries kWh! This gives an idea of ​​what this would mean (and cost).

Of course, the other Californian Tesla announcing a truck, will surely soon announce tractors ... And then rockets for March ... and soon pedal bikes for jupiter ...

I think we are here in the bobology - finally marketing, to speak. And keep the media busy. And it works: the proof, we are talking about it! AND undoubtedly a niche market for the Green Space tractors of the communities (which are, them, in city center). And used as a "wheelbarrow push" has very low powers ...

The tractor of the future seems to me to be the biomethane tractor! With indeed interchangeable tanks.

[sicetaitsimple]

Indeed, the agricultural tractor does not seem to me to be the best candidate "utility vehicle" for electrification.

Simply because its use is very variable in the year, with huge periods of peak activity where the capacity of the batteries would become a limiting factor for essential work and do not wait, and periods of depression where the l investment in batteries would be underutilized.

There is, at least from my point of view, at first concerning professional uses much better to do, I think of urban bus-style vehicles, delivery vans, company-style fleets La Poste or EDF ,. ... which globally have a known and regular activity profile throughout the year.

The personal vehicle falls under another scheme.

[chatelot16]

And used as "wheelbarrow pushers" has very low powers

... shovel rake is soon the hour of the aperitif ... we agree the electric power is largely sufficient

but for the farmer who makes the 3 8 alone to finish the hay before the rain arrives the energy limitation of the electric is impossible

[Remundo]

I would rather see for myself a hybrid system predominantly electric.

the all-electric tractor seems impossible to me on "real" agricultural work. If it's just a matter of dragging a small trailer nearby, yes it can ...

a publication on this subject: http://sycomoreen.free.fr/syco_annonces ... l#12122016