I’m currently working on version 2 of the Tyre Size Calculator, it’ll fix some inconsistencies in the current version and add a few new features that commentors have asked for e.g.
I’m also thinking of adding the option to specify the wheel width so you can see how fat or stretched the selected tyre size will be on a given wheel width.
If anybody has any comments of suggestions then feel free to post them below 🙂
While most of the world follows the Lithium-Ion battery based electric car design there are some others that still believe in the Hydrogen Fuel Cell. GM have recently improved their fuel cell design further by halving the size of the fuel cell and reducing the cost of production.
The size of GM’s fuel cell is now comparable with an average four cylinder engine whilst still maintaining the same 93 kW (125 BHP) power output as previous designs. The test-bed Chevy Equinox fuel cell vehicle has a maximum range of 150 miles and a top speed of 100mph, if they had used a smaller model then I expect these figures would have been better.
Production costs have been cut by halving the amount of platinum used in the fuel cell, with further reductions expected in the future. With production planned for 2012 the only concern is the costly drive train which will need refining in order to make the cost of the car viable.
Whilst there is still a carbon cost associated with producing hydrogen it is still by far the cleanest of current alternative fuel designs. My main concern is that a hugely expensive infrastructure will be rolled out to accommodate the recharging of popularised Lithium-Ion cars. Nobody is going to want to repeat the process for Hydrogen refilling stations.
Auto Express have gotten hold of photos of what appears to be a Porsche 911 Hybrid in testing.
Luke Madden writes:
Here’s a shocking revelation – it’s an electric hybrid version of the Porsche 911!
With the announcement of hybrid versions of the Cayenne and the Panamera, it was only a matter of time before the brand’s performance models received the same treatment.
These photos show a 911 prototype with an interesting bulge on the bonnet carrying a lightning bolt sticker. Our photographers noted that the prototype seemed unusually quiet as it pulled away.
The position of the bulge suggests the electric motor will be located at the front of the car, powering the front wheels whilst a boxer engine at the rear will drive the back wheels.
This technology could offer the option of a front-wheel drive, all electric vehicle or, when performance is needed, a four wheel drive petrol-electric hybrid.
Porsche purists may be sceptical as weighty batteries in the front will balance out the trademark rear-heavy 911, however, a high-mpg, high performance supercar may prove to be a winning formula.
As regulations on CO2 emissions become ever stricter, the hybrid 911 could open the floodgates for other high-performance hybrids. Competitors such as Ferrari are rumoured to be working on a hybrid version of the recently announced 458 Italia.
via Porsche 911 hybrid | Auto Express News | News | Auto Express.
I’m not entirely sure why companies are diving at hybrid concepts when it has been shown that the CO2 and power output of Hybrids such as the Prius and Insight can be matched or bettered by diesel engines. I expect the main reason for us seeing this hybrid before a 911 diesel is the perceived image. I don’t think that diesels have yet escaped the dirty, noisey, farm machinery stereotype that has plauged them for so long. When compared to the current trend for space aged, eco warrior hybrid engines and drive train its obvious which would be easier to market.
Its a shame really as I think it would be a better idea to use tried and tested diesel technology now and spend the big money researching hydrogen fuel cells, batteries, electric drive trains and transmissions.