Saturday, February 02, 2013

Makoto Hirano: “If Honda had given up oval piston development, there wouldn’t have been any VTEC”

1992 Honda NR750 1992 Honda NR750 1992 Honda NR750 1992 Honda NR750
Only Honda could have done the oval-piston NR, says Hirano and he's right of course. Even after two decades, the NR represents unsurpassed engineering brilliance...

Honda produced just 300 units of the NR and that was back in 1992 – more than two decades ago – and yet, for us, that bike remains one of the most intriguing, deeply fascinating motorcycles ever built anywhere in the world. Some of that fascination is down to the NR’s oval-piston engine, of course – the NR’s massively complicated four-cylinder 750cc engine had 8 valves per cylinder and two conrods per piston, which allowed the engine to function as a V8. No, honestly, we don’t really understand how it worked, but the fact that it did, and that Honda actually built a streetbike – one that cost US$50,000 back in 1992 – around this engine was some kind of a miracle. And it really doesn’t matter that with 125bhp at 14,000rpm, the NR engine’s output doesn’t really look anything special today, when compared to modern-day 750cc sportsbikes.

“When I look back at it, I’m not sure if we were experimenting with cutting-edge technology or obsessed with foolish ideas,” says Toshimitsu Yoshimura, speaking to Inspire magazine. “We didn’t think much about whether the engine would actually turn over or even whether it would be practical at all. We weren’t worried about those things since we just wanted to make it work. To create anything, you must put your heart and soul to it. The development of oval piston engines impressed that upon me, as well as on the other young engineers,” adds Toshimitsu, who was one of the engineers who actually worked on the development of the Honda NR’s oval-piston engine.

Sunday, January 27, 2013

2013 MTT Y2K could be out by July this year

image host
How fast do you want to go? Would about 450km/h be sufficient...?

According to a report in Autocar, Marine Turbine Technologies (MTT) are now working on a new version of the Y2K hyperbike, which is expected to be launched in the US and in Europe by mid-2013. Fitted with a Rolls-Royce C-20B gas turbine engine that produces 420 horsepower (100bhp more than the original Y2K that was launched in the year 2000), the 2013 MTT Y2K, which is currently undergoing wind tunnel testing in the UK, is expected to have a top speed of more than 440km/h. And since the original Y2K was able to accelerate from zero to 320km/h in 5.4 seconds, the new one should be able to do it in a bit less than that.

Other new bits on the 2013 MTT Y2K could include things like carbonfibre wheels, carbonfibre full fairing, an aluminium alloy chassis, bigger brake discs with radial-mount calipers at the front, a 240-section rear tyre and in keeping with developments in technology that have happened in the last 10 years, more advanced electronics, including ABS. The price hasn’t been confirmed yet, of course, but expect to pay about US$200,000 for the privilege of owning the world’s fastest, quickest accelerating jet-propelled motorcycle…

Source: Autocar