214mpg from this?

Cool DIY Streamliner Motorcycle Gets 214 MPG

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We love eco-modders and hypermilers because their singular pursuit of superlative fuel economy often results in innovative thinking and interesting vehicles. Like, say, this Honda streamliner. Not only did Allert Jacobs’ slick DIY fairing make a pedestrian Honda Innova motorcycle downright cool, it boosted the bike’s fuel economy to 214 mpg.

The Honda Innova is no slouch out of the box, returning 133 mpg from a 125cc engine producing a whopping 9 horsepower. But the Dutch “efficiency enthusiast,” as EcoModder calls him in its write-up, couldn’t leave well enough alone.

He’s put in a lot of miles on recumbent bicycles and knows a thing or two about aerodynamics, so the first thing he did was convert the Inova to a recumbent by moving the seat waaaay down on the bike’s step-through frame and moving the footpegs. That and a simple fairing boosted the bike’s top speed from 56 mph to 69 mph. Together with taller gearing, Jacobs raised his fuel economy to 156 mpg.

But why stop there? Jacobs spent several months designing and building the full fairing, which splits in two vertically just behind the windshield so he can get in. While it looks like you’d blow right over with a sneeze, Jacobs claims the bike is stable even in a 40-mph crosswind.

The bike’s record is 214 mpg, and Jacobs says it averages 199. But he’s not done yet. He’s shooting for 235 mpg — which for those using the metric system is 1 liter per 100 kilometers.

More info and pics at EcoModder, where one member is doing a similar mod with a Suzuki Burgman scooter.

source Wired
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DIY Hyper-Modified Honda Motorcycle Hits 214 MPG

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Fans of the hypermiling super-modded Aerocivic, meet its motorcycle counterpart! Designed and built by velomobile enthusiast Allert Jacobs, this streamlined recumbent motorcycle has been outfitted with an aerodynamic fairing that increases its top speed and enables it to get over 200mpg while cruising at 55mph!

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Jacobs built his hyper-efficient Honda from a Innova motorcycle that weighed in at 231 pounds with a 9 horsepower 4-stroke 125cc engine. An avid recumbent bicycle designer, Jacobs decided to apply the same design principles to his motorcycle, lowering the bike’s riding position and giving it an aerodynamic shell that reduces exposure to oncoming air.


Before modification the motorcycle was capable of hitting a fairly impressive 114mpg, but Jacobs’ modifications pushed that number up to 214mpg. The finished bike features provides enhanced weather production, comfort, and speed, and splits in half to allow easy mounting and dismounting


It’s incredible how a few aerodynamic modifications can dramatically increase the efficiency of a production vehicle. It kind of makes you wonder why the companies producing these vehicles don’t take similar steps to increase their efficiency.


+ Allert Jacobs’ Recumbent Motorbike
Via Ecomodder and Gas2.0






source inhabitat

 

Honda aerodynamic scooter conversion results in 214 mpg

Adding a self-built aerodynamic outer shell to a brand new Honda Innova 125i big-wheeled, step through scooter has resulted in its already pretty impressive fuel efficiency being improved considerably. Experienced Dutch cycle designer Allert Jacobs has spent the last couple of years designing, building and tweaking his machine before hitting the road recently for the all important road test.

After designing an aerodynamic, recumbent pedal-powered three-wheeler, Jacobs started to think about the possibility of moving onto bigger and more powerful vehicles. Considering the rules and regulations involved in building a roadworthy car to be too restrictive, he set his sights on a motorbike.

Streamlining performance motorcycles is by no means new. Sport machines began getting some pretty impressive results from enclosed fairings before the Fédération Internationale de Motocyclisme put the brakes on full enclosure fairings for sport motorcycles in the 1950s due to safety concerns.

Since then, work by (amongst others) Craig Vetter has shown that not only does streamlining provide gains in the speed department but also results in some impressive fuel savings. Vetter has, in fact, just recently managed to persuade the Fédération to lift its ban for electric motorbikes, opening the floodgates for electric fairing enhancements for future performance riders.

Aerodynamics is a real drag
Forward movement is of course met with resistance to that movement, from the air and from any surface an object happens to be in contact with. Most of the resistance encountered on a motorcycle however is aerodynamic. Any motorcyclist who has tucked down close to the bike will know that reducing drag results in a speed boost without the need for increased throttle. Jacobs calculated that at 55mph, a naked motorbike is likely to suffer 90% of its resistance due to aerodynamic drag.

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The ideal solution for a fuel efficient motorbike would be an electrically-powered one, but Jacobs considered limited range to be problematic so he opted for the small and light engined Honda Innova 125i, which was first made available to Europeans in 2006 and was intended to replace the popular Super Cub. The Innova is already highly regarded for efficiency, Honda UK claiming it gives: "a robust 46 miles of operation on a single liter of fuel (measured at an operating urban speed of 33mph)".

Filling its 3.7 liter fuel tank got Jacobs around 140 miles to the gallon (mpg) during the initial run in period required for a new vehicle. When he started to increase throttle activity somewhat, the scooter still offered between 107 and 122mpg. Inspired by the work of the likes of Vetter, Jacobs decided to aim for 235mpg fuel efficiency for his creation.

Trimming the fat
In the Winter of 2007 Jacobs started his project by stripping away the Innova's body work and seating. He then installed footrests above the front wheel to cater for a recumbent riding position, threw in some seating and attached a nosecone. An early evaluation showed that even these modest modifications had increased the bike's top speed and fuel efficiency but there was still much more to be done.

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As a result of instability issues, he was forced enclose the front wheel within the streamlining casing instead of underneath the nosecone and modify the riding position so that his feet moved down to rest at each side of the wheel when in motion. The latter half of 2008 was spent taking the design suggestions offered by a 1:5 scale model and creating a full size template from PU foam.

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2009 dawned and with it the creation of the mould for the final streamlined casing. Modifications were made to the steering and the exhaust was lowered so that it sat outside of the casing. Getting in and out of the casing was made possible by slicing it down the middle and attaching the front end to a rail which extended it forward by 18 inches. Rubber cones and trips ensured a snug fit when in cruising position and an open bottom design catered for stable ground footing when at rest. The lights were also wired up and tested.

Hit the road, Jack
With everything in place and working it was time for the all important road test. Jacobs climbed into the 319 pound vehicle (88 pounds heavier than the original scooter) and set off for a 160 mile stretch of open road. His creation managed to achieve an amazing 214mpg at around 55mph with good conditions and only a 25mph wind.

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Jacobs suspects that some fine tuning will see his vehicle reach that target fuel efficiency of 235mpg but as of writing, the poor weather being what it is, he has been putting his time to good use by pimping his ride, adding reflective striping and other embellishments. As the weather improves, his work in progress may yet see his target achieved and perhaps even exceeded.

source gizmag

 

The bicycle-inspired scooter that delivers 214mpg

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It is perhaps because small capacity motorcycles regularly travel 100 miles on one gallon of petrol that so few are designed to maximise their aerodynamic efficiency, but a Dutch cycle designer has done just that and achieved an impressive 214mpg.

Allert Jacobs fitted a Honda Innova 125cc scooter (best known in Britain as the pizza delivery scooter of choice) with an aerodynamic outer shell.

In its standard form the Honda delivers an already-impressive 110mpg, but the addition of the bodywork boosted the figure to 214mpg. Mr Jacobs hopes to eventually achieve a figure of over 230mpg.

A spokesperson for the Environmental Transport Association (ETA) said: “There is a history of fitting aerodynamic shells like these to recumbent bicycles to boost performance – the results are no less impressive in this case.”

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source eta.co.uk
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