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A closer look at the motorcycle El Chapo used to escape prison

Joaquin Archivaldo Guzman Loera, better known by his nickname, El Chapo, stands five-feet, five-inches tall. This defining trait – his nickname, not coincidentally, can be translated as "Shorty" in Spanish – is an important detail in his escape, as the tunnel that stretched a mile underground that led the drug kingpin to safety measures just one inch taller than Guzman's height. Clearly, this was a well-planned and executed escape. The tunnel that was custom-sized to perfectly fit El Chapo started at an abandoned building in the middle of an empty field and ended in a tight shaft that led to the shower stall in Guzman's jail cell. In between those start- and finish-points was an impressively dug-out hole in the Earth, complete with ventilation shafts, wiring for electricity and lights, and rails on the bottom to serve as tracks for a custom-built motorcycle that El Chapo apparently rode to freedom. There are specific traits that could be useful in figuring out what kind of motorcycle we're looking at. All of these facts are well-known to anyone who's been following the story of how the most notorious criminal in Mexico could escape from a maximum-security prison in broad daylight. Especially considering that this event marks the second time since 2001 that Guzman has arranged his own prison break. There's one detail, though, that has caught our attention. A close look at the images released by Mexican authorities shows us a motorcycle that's been heavily modified specifically to work underground. We can't be certain, based on the grainy shots and limited viewing angles of the pictures we have access to, but there are some specific traits that could be useful in figuring out what kind of motorcycle we're looking at. For starters, there's the engine. It's a single-cylinder, air-cooled powerplant, canted slightly forward. The exhaust exits on the right side of the bike, when looking from above, and there's a short chain guard on the opposite side. Granted, that doesn't narrow it down all that much. A look at the shape of the fins on the cylinder and the shape of the head, though, makes us think this may be one of Honda's ubiquitous CG-series of engines. A quick look at the bike's frame shows a single downtube, dual shocks and a steel-tube swingarm. That means it's probably not of particularly recent vintage, but we can't really pinpoint exactly what model it may be.

Honda patents engine with different cylinder displacements

A basic rule of engine design states that the displacement of a cylinder is equal to the engine's total displacement divided by its cylinder count. Honda, according to a recently surfaced Japanese patent, is looking to break that rule with an engine containing cylinders of different sizes. We've done our best to translate it from patent-ese. The idea is that different-sized combustion chambers give more flexibility when any combination of cylinders are deactivated, or rested. Because the different numbers can be combined in various ways, it provides more and smaller increments than would an engine with equal-displacement cylinders. Take a 2.0-liter four-cylinder, for example. Following the golden displacement rule, each of the four cylinders has a volume of 500 cc, giving displacement increments of 500 cc when any cylinder is deactivated. But suppose instead that the four cylinders displace 300, 425, 600, and 675 cc, respectively. This would give the engine 15 available displacements instead of just four, and the spacing between each option would be far less than 500cc. As a result, those different virtual displacements would provide more adjustment between power and efficiency than a cylinder-deactivation system can on a conventional engine. Honda's patent describes cylinders with equal bore size, with the displacement from cylinder to cylinder varying based on the crank throw radius – the longer the throw, the longer the stroke and the larger the displacement of that particular combustion chamber. The patent describes how the cylinder sizes would need to be arranged to spread the load on the crankshaft and presumably limit vibration that would be introduced by the different pulse magnitudes. If we're interpreting things correctly, the largest cylinder (the one with the longest crank throw radius) sits in the middle of the bank with the smaller ones alternating on either side as they decrease in displacement. This concept is described for multi-cylinder inline and V-type engines of various sizes. The patent was filed in March of 2014 and published in January of this year. Whether or not this arrangement will reach production is of course unknown, but the advantages in terms of both efficiency and power seem promising. Related Video: News Source: Japan Patent Office via Auto Guide Green Honda Fuel Efficiency Technology patent

Acura to roll out NSX Prototype for Mid-Ohio IndyCar race

Acura will tease us yet again with its next-gen NSX when it makes an appearance at Mid-Ohio Raceway before the circuit's IndyCar race early next month. To be fair, the car's in-motion debut won't take the form of a production model - that's still a ways off - the vehicle will be a prototype. It'll be sporting custom graphics and an eye-catching paint (wrap?) job to draw the attention of the spectators, but really, we just want to hear this thing rounding the legendary road course at full chat.
The NSX prototype doesn't look to be much different from the various showcars we've seen over the last couple of years, with the same mid-engined, hybrid V6 power and all-wheel drive all present and accounted for.
The display will take place before the Honda Indy 200 IndyCar Series on August 4. The race itself starts at 3:00 pm and will be shown on NBC Sports Network.