1988 Mazda Rx7 Convertible With 17k Miles, Outstanding Original Condition on 2040-cars

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Tougher than steel: Wood pulp could make lighter auto parts

KYOTO, Japan — The global push among carmakers to make ever lighter vehicles is leading some auto suppliers in Japan to turn to what seems like an unlikely steel substitute — wood pulp. Japanese researchers and auto component makers say a material made from wood pulp weighs just one-fifth of steel and can be five times stronger. The material - cellulose nanofibers — could become a viable alternative to steel in the decades ahead, they say, although it faces competition from carbon-based materials, and remains a long way from being commercially viable.> Related: Jay Leno drives the Renew cannabis car — hemp you can't dent Reducing the weight of a vehicle will be critical as manufacturers move to bring electric cars into the mainstream. Batteries are an expensive but vital component, so a reduction in car weight will mean fewer batteries will be needed to power the vehicle, saving on costs. "Lightweighting is a constant issue for us," said Masanori Matsushiro, a project manager overseeing body design at Toyota. "But we also have to resolve the issue of high manufacturing costs before we see an increased use of new, lighter-weight materials in mass-volume cars."A NEW PROCESS Researchers at Kyoto University and major parts suppliers such as Denso Corp, Toyota's biggest supplier, and DaikyoNishikawa Corp, are working with plastics incorporated with cellulose nanofibers — made by breaking down wood pulp fibers into several hundredths of a micron (one thousandth of a millimeter). Cellulose nanofibers have been used in a variety of products ranging from ink to transparent displays, but their potential use in cars has been enabled by the "Kyoto Process," under which chemically treated wood fibers are kneaded into plastics while simultaneously being broken down into nanofibers, slashing the cost of production to roughly one-fifth that of other processes. "This is the lowest-cost, highest-performance application for cellulose nanofibers, and that's why we're focusing on its use in auto and aircraft parts," Kyoto University Professor Hiroaki Yano, who is leading the research, told Reuters in an interview. The university, along with auto parts suppliers, are currently developing a prototype car using cellulose nanofiber-based parts to be completed in 2020.

The Miata is always the answer, but which one is the answer for you?

If you follow along with our long-term vehicles, you know that we had a 2016 Miata Club in the fleet. It's a Miata that had every sporty bit available installed, but there are other ways to spec out an MX-5. Just recently, we had the chance to sample the other end of the MX-5 spectrum, the Miata RF Grand Touring. While they're cut from the same sheetmetal, they're surprisingly different cars. So we thought we'd put together a little guide to help you figure out what bodystyle and trim level of Miata is right for you. How do you like the wind in your hair? If you're someone who loves soaking up the sun and having the wind blow through your hair, or lack thereof, there's no replacement for the soft-top Miata. The manual folding mechanism will get you out into the fresh air faster than virtually any other convertible, and it will go back up just as easily when the rain comes. Raising and lowering it is quick and easy, and can be done with one hand from the driver's seat. And with the top down, you'll be greeted by breeze from virtually every direction, and an airy, unencumbered feeling that only comes with a full convertible. However, if you prefer to keep your hair in place and just get some sun, the RF is the better choice. The retractable targa top still descends and reemerges quickly, taking just 13 seconds either way. Keeping the windows up with the targa stowed will allow in plenty of sun, but will keep wind to a minimum. But when the windows drop, you'll still get a healthy dose of airflow. It still doesn't feel as open as the soft top, though, since you'll be able to catch the fastback pillar out of the corner of your eye. But if you value protection over airflow, that won't be an issue. View 11 Photos Does your Miata need to be a daily driver and occasional road tripper? While many Miatas will be weekend toys, one of the appealing things about them is that they're reliable enough and have just enough cargo space that they can serve as an everyday vehicle. For people who want to use a Miata as a daily commuter, and even take it on road trips, we would recommend an RF with the Grand Touring trim, as seen above. Although it still isn't a quiet car in the grand scheme of things, the RF's solid top makes it more livable for highway stints both short and long. The Grand Touring trim comes recommended for these purposes for a couple of reasons. Foremost is the more forgiving suspension shared between it and the base-level Sport.

Patent application suggests Mazda rotary return

A recent patent application by Mazda reveals that the Japanese automaker is still working on the rotary engine. This could in fact be the Skyactiv-R engine found in the RX-Vision concept from the 2015 Tokyo Motor Show. As with anything Wankel-related, nothing is certain until Mazda makes a production commitment. But this filing suggests that serious development is happening in Hiroshima. The 2011 Mazda RX-8 was the last rotary-powered car you could buy in America. Slow sales, poor fuel economy, and tighter emissions standards prevented Mazda from committing to a follow-up. But the fundamental principles of the rotary - compact size and light weight - perfectly fit Mazda's Skyactiv ethos. (For an explanation of how rotaries work, click here.) In this new engine the intake port sits at the bottom of the engine with the exhaust port on top instead of the other way around. That allows for lower mounting, which improves a car's center of gravity. This rotary is also turbocharged. Putting the turbo up high helps ensure it doesn't get in the way of any body or chassis crossmembers. The implication of those claims is that somebody is thinking about how to put this engine in a car. There are other benefits as well. The short path from the exhaust port to the turbo ensures minimal turbo lag. It also allows for a close-mounted catalyst on top of the enigne, which will help emissions. Another innovation in this new engine is a triangle-shaped rotor that covers part of the exhaust port. This allows for different exhaust flow characteristics. The filing claims that that two of the four orientations allow for less airflow resistance in the exhaust port. As in previous Mazda rotaries, there are two spark plugs to manage ignition timing and combustion. But unlike in the 16X concept, Mazda's last public display of such an engine, the new rotary uses port fuel injection. Keep in mind this is only a patent application. A Mazda spokesperson refused to comment on future product, but commented "As we stated at the Tokyo motor show, Mazda is doing all that it can to bring a rotary to the market." In the meantime, keep your RX-7 prayer candles lit and hope for the return of the rotary before the end of the decade. You can bide your time by reading the entire application here. Related Video: Related Gallery Mazda RX-Vision Concept: Tokyo 2015 View 11 Photos News Source: USPTO via autoevolution Rumormill Mazda Performance rotary mazda rx7