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Last Modified 10:57 AM, April 15, 2010

Moped Senior Design team members Andrew Bomstad, Ben Vindedahl, Adam Bieber, Jared Recker and Josh Schmidt

April 15, 2010—

What do you get when you cross a couple of scuba tanks and a 1978 Sachs moped? Ideally, an air-powered two-wheeler to give you a boost up Houghton's hills, backed up by leg power if the air runs out before you get home.

That's the idea behind an air-driven moped developed as a Senior Design project in the Department of Mechanical Engineering-Engineering Mechanics. Advisors James De Clerck, a professor of practice, and graduate student Nick Mastricola lead the five team members: Adam Bieber, Andrew Bomstad, Jared Recker, Joshua Schmidt and Benjamin Vindedahl. The moped was exhibited at Tech's Undergraduate Expo.

"It's a hybrid between a moped and a bicycle, " says Bomstad. Two standard scuba tanks containing 3, 000 psi of air are mounted on either side of the rear wheel. The driver can pedal around using the moped's bicycle gears or engage the pressurized air to reach a top speed of about 12 mph on the flat.

The team wanted to build a moped that never needed to stop at a gas station and could be powered by a renewable energy source. However, they noted, just being air-powered doesn't necessarily make it environment-friendly. Powering an air compressor to fill the tanks takes energy, so the moped is only as green as the compressor's power source.

That said, the air-powered moped has a quality that not even a hydrogen-powered vehicle can claim: no emissions other than plain old air. Period. "It would be perfect for getting around in enclosed spaces, like a warehouse, " Bomstad says.

While the team members are pleased with their handiwork, they didn't get to build the moped of their dreams. It can only travel about a mile and a half on air power alone, much less than they had hoped. The shortfall is due in part to "overly optimistic estimates of torque requirements" and funding constraints. A little research revealed that using super-light carbon fiber air tanks and the ideal air motor would push their budget well over the limit.

That's OK, says De Clerck. "They learned a lot about the design process; they started with ideal goals and had to compromise, " he says. "And they did a great job of applying mechanical engineering concepts. This was a very good approximation of a real-world experience."

Michigan Technological University ( is a leading public research university developing new technologies and preparing students to create the future for a prosperous and sustainable world. Michigan Tech offers more than 130 undergraduate and graduate degree programs in engineering; forest resources; computing; technology; business; economics; natural, physical and environmental sciences; arts; humanities; and social sciences.

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2009-07-21 06:30:41 by GenElec

Laws concerning motorcycles, scooters, and mopeds are different here in Minnesota, but I looked up the New York State regulations (NYC may be different yet?) and from what I gather all motorcycles and "Vespa" type scooters must be insured. Just FYI -- but you should get a copy and understand your regulations before buying a scooter.
Also, in most states scooters are divided into two classes: those that can go 30 mph max, and those (including some 50cc models) that can go faster than 30. You usually need a "motorcycle" license/endorsement to ride the faster ones.

Is This BMW the Ultimate Maxiscooter?  — New York Times
By STUART F. BROWN. Published: July 5, 2013. Of all the head-of-the-class vehicles one might expect from the wizards at BMW's research and development works, a high-performance scooter would probably be well down the list. If it made the list at all.

Aprilia SRV 850 In Australia This Month: World's Most Powerful Scooter  — The Motor Report
Aprilia describes the SRV 850 as an “ultra-high performance scooter, the meeting point between the scooter world and the motorcycle world”, and there's plenty of mechanical evidence to back that claim.

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  • Avatar bobton4 Looking For Sachs Flying Dutchman Moped Parts?
    Sep 05, 2009 by bobton4 | Posted in Motorcycles

    I have a 1978 Sachs Flying Dutchman Moped and a couple of the parts are not working. I was wondering if anyone new a website or a shop in London where i could buy some spare parts.

    • I like Sachs. They make good bikes. But your bike is too old. Get rid of it mate.

  • Avatar Kody I have a 1978 sachs westfall moped?
    Jul 14, 2013 by Kody | Posted in Motorcycles

    I bought this 1978 westfall Sachs moped got it home got it started but was boging out so put a new plug in it n still running like crap ne ideas what it could be?

    • Clean the carb,especially the bowl.