2010 Mazda Mx-5 Miata on 2040-cars

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Watch what happens inside a rotary engine

Since it looks like Mazda may very well revive the Wankel rotary engine as a range extender for electric cars, there's no better time to become reacquainted with the quirky internal-combustion engine. And there's hardly a better way to become reacquainted than by peering into a running rotary engine, which you can do with the video above. The video comes to us from the YouTube channel Warped Perception. The channel has already shown what happens inside a conventional internal-combustion piston engine by putting a clear cylinder head on top of a flathead engine. This new video shows off the rotary engine by adding a clear side to a tiny model-airplane engine, something that we weren't aware existed and are glad to know about now. Despite the tiny size, the engine is functionally almost exactly like the bigger versions you'll find in Mazdas from about 1967 to 2012. It has intake and exhaust ports on the edges of the rotor housing, and the triangular rotor swings about in a peanut-shaped housing. For maximum effect, jump to right around the 7:40 timestamp. This is the point at which a bit of acetylene is added to the air-fuel mix for a brighter flame. It's at this point that you can really see when the mixture combusts and how the pressure of the flame pushes the rotor to produce rotational motion. Each stage of the video does slow things down to make everything as clear as possible. Even if you already knew how rotary engines worked, it's still fascinating to watch, first because it's something you don't get to see usually, and also because of the engine's elegant simplicity. Related Video: Image Credit: YouTube / Warped Perception Weird Car News Mazda Technology Videos rotary rotary engine

1993 Mazda RX-7 Retro Review | A '90s hero turns 25

Boom times build interesting cars. In the late 1980s, Japan was flush with capital, and automakers spent like the party was never going to end. Suddenly building the third-generation RX-7 — the world's most advanced twin-turbo rotary sports car — seemed like the most natural thing a small car company hailing from Hiroshima could do. On this side of the Pacific, however, there was no context for the sudden influx of unusually tricked-out Japanese hardware flooding American dealerships. And none of the Japanese sports cars of the era was more unusual than the FD-generation Mazda RX-7, imported from 1993 to 1995 (and continuing on in Japan until 2002). Although the island nation's economy was headed on a downward spiral by the end of 1990, Mazda was in no position to pull back and walk away from the development dollars that had already been spent on its latest RX-7. As a result, Americans were able to briefly bask in the glow of one of the most unique engineering experiments ever unleashed on unsuspecting buyers. For its time, the Mazda RX-7 was a spaceship. With fluid lines that screamed "exotic," it joined the NSX in showing that supercars didn't have to have European blue blood running in their cooling systems to elegantly snag eyeballs. The twin-rotor, 1.3-liter 13B-REW situated behind the RX-7's front axle revved all the way to 8,000 rpm on its quest to produce 255 horsepower and 217 pound-feet of torque, with a pair of sequential turbos handing boost duties back and forth around the 4,500 rpm mark. A five-speed manual gearbox was standard with the FD (a four-speed automatic was optional), as was a curb weight in the neighborhood of 2,800 pounds — nearly 500 lbs less than the contemporary Toyota Supra. Significant figures for the era, to be sure. While they might pale in comparison to the average sports car today, slide into the RX-7's cockpit and drive the car, rather than just crunch the numbers. You'll quickly discover what can be accomplished when the company that engineered the Miata pulls a full John Hammond and "spares no expense" developing a world-beating sports car platform. The 1993 Mazda RX-7 I've been loaned from Mazda's classic collection is an R1 car, which means tighter suspension tuning, a few cosmetic upgrades, and a Competition Yellow paint job.

Mazda recalls 374,500 vehicles because of Takata inflators

The Basics: Mazda will recall 374,519 examples of the 2003-2008 Mazda6 manufactured from May 29, 2002, to May 5, 2008; the 2006-2007 Mazdaspeed6 built from July 1, 2005, to June 29, 2007; and the 2004 RX-8 made from June 25, 2003, to June 30, 2003. The Problem: These vehicles contain front passenger airbag inflators from Takata that could rupture in a crash. If this happens, it could spray metal shrapnel at an occupant, which could seriously injure or even kill the person. Injuries/Deaths: The report from the National Highway Traffic Safety Administration didn't mention injuries or deaths, but Autoblog reached out to Mazda for confirmation. Takata's rupturing inflators allegedly have links to nine deaths globally and around 100 injuries. The Fix: Mazda dealers will replace the passenger side airbag with a new one. If You Own One: Mazda has not said when the replacements for these vehicles will begin. Experts believe that prolonged exposure to high humidity can cause the inflators' ammonium nitrate propellant to ignite too quickly in an accident. More Information: This recall is a nationwide expansion of Mazda's passenger's side airbag recall, which was previously limited to high-humidity regions. The population now includes 310,592 additional examples of the Mazda6, Mazda spokesperson Tamara Mlynarczyk tells Autoblog. The company discovered this new issue after Takata tested an inflator taken from a Mazda6, and it ruptured, according to NHTSA documents (PDF). The company already had a national safety campaign to fix the driver's side airbags in these vehicles. Related Video: RECALL Subject : Passenger Air Bag Inflator May Rupture Report Receipt Date: DEC 23, 2015 NHTSA Campaign Number: 15V869000 Component(s): AIR BAGS Potential Number of Units Affected: 374,519 All Products Associated with this Recall Vehicle Make Model Model Year(s) MAZDA MAZDA6 2003-2008 MAZDA MAZDASPEED6 2006-2007 MAZDA RX-8 2004 Details close Manufacturer: Mazda North American Operations SUMMARY: Mazda North American Operations (Mazda) is recalling certain model year 2003-2008 Mazda6 vehicles manufactured May 29, 2002, to May 5, 2008, 2006-2007 Mazdaspeed6 vehicles manufactured July 1, 2005, to June 29, 2007, and a limited production of model year 2004 RX-8 vehicles manufactured June 25, 2003, to June 30, 2003. The inflators in the front passenger air bags are susceptible to rupture in the event of a crash necessitating the deployment of the front passenger air bag.