Chainless Challenge: A Hydraulic Bicycle?

Parker Hannifin Chainless ChallengeIn about 2006, those of us who are involved in hydraulics and love it began to worry that students were losing interest in the technology. To better attract bright young students to hydraulics, Parker Hydraulics Group sponsored a competition in which the challenge was to build a bicycle powered by hydraulics instead of a chain drive. It seemed like a fun idea to focus on bicycle design and we dubbed the competition “Chainless Challenge.”


Competition grows through the years

The first competition, held around 2006, was interesting because while some students developed efficient solutions, other students designed bicycles that, well, sometimes required a bit of pushing! Contrast that with a recent competition where our hydraulic bike designs achieved speeds of up to 40 miles per hour.

2013 Parker Hannifin Chainless Challenge TrophyThe competition features different categories such as drag, endurance, start-stop, and efficiency races. Winning teams get awards and scholarships. The competition is capped at 10 teams but we are hoping to expand by getting a consortium of other companies, academia, and perhaps an association such as the SAE involved.

The Chainless Challenge has long since gone viral. Last year, we even had to turn some schools away after our initial spots were taken.



A Bicycle = A Big Multiplier?

Parker Hannifin Chainless Challenge bike sprint 2013Note that from an engineering standpoint, when you compare man to other animals in regards to speed, the bicycle is a “big multiplier.” Man runs a lot more slowly than a panther, for example; but a human on a bicycle can move at relatively high speeds and for long distances. The basic format of a bicycle hasn't really changed much in 150 years — triangular shape, a chain, a sprocket — because the design is very efficient. Hydraulics, though, are notoriously inefficient at low speeds. And the amount of horsepower a person can generate is pretty small. For the Challenge, students basically were tasked with marrying hydraulic pumps and motors with a bicycle frame.

Over time, the Challenge is also a winner because it is now attracting students to hydraulics like never before.


Read the next post in this series to find out more about the bike design.


Craig Maxwell VP Chief Technology and Innovation Officier Parker HannifinArticle contributed by  Craig Maxwell, Corporate Vice President Technology and Innovation, Parker Hannifin




Parker’s Chainless Challenge Prompts Innovative Approach to Vehicle Mobility

An Adult Tricycle Wins the Chainless Challenge Race

Chainless Challenge Inspires Engineering Student Creativity


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Comments for Chainless Challenge: A Hydraulic Bicycle?

Steve Bradway
My son will be on the team from Purdue. Will the competition be in a publically accessible venue?
Nahum Goldenberg
My Hydrostatic Bicycle is a Human Power Drive of (~250 Watt)that enable IN Wheel Motors Driven by Direct Pedal rotating directly Radial Piston Pump at 0-100 RPM with Volumetric Efficiency of nearly 100%. Like in any automotive machine it enable Front Wheel High Speed, Rear Wheel Medium Speed or All Wheel , 2x2, Drive. The Bicycle is a working prototype and I look for cooperation in production of a Commercial Bicycle.
Call me for further details. I the past I had some
contacts with Parker in Cleveland.
Sincerely-Nahum Goldenberg

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