Freicycle Is the World’s Lightest e-Bike at 15 Kilos. It’s Quick, Too
The Freicycle is much more costly than that, nevertheless it’s additionally lighter nonetheless. It’s additionally only a prototype and there are not any present plans to convey it into manufacturing.
The Freicycle was designed by mechanical engineer Dennis Freiburg from Germany, and was verified by the Guinness E-book of World Data because the lightest e-bike on the planet in December 2019, in Dortmund, Germany. It weighs as little as 15.5 kilos (6.872 kg) and, despite the fact that you’ll be able to’t inform by it, it’s motorized.
“Principally, the folks can’t consider that it’s an e-bike,” he mentioned on the time. “They preserve lifting it up and saying loopy how gentle it’s.”
Although Dr. Freiburg set the file some time again, it’s simply now that he’s disclosing the recipe to his profitable design. The key, he tells New Atlas, was to take the lightest body on the market (carbon fiber, in fact) and add to it solely the naked requirements, both from carbon fiber or 3D printed. The objective was, from the beginning, to get into Guinness – however the challenge additionally served as a part of a challenge for his doctoral diploma. Speak about killing two birds with one
Ranging from a 2016 Merida Scultura bike, which has a carbon fiber body that weighs 2.2 kilos (1 kg), Dr. Freiburg added rim-mounted brakes, carbon rims, full carbon crank and 3D printed pedals. He went by means of a number of mixtures and alternate options till he bought the bottom weight doable.
For energy, Dr. Freiburg additionally wished one thing that may add as little as doable to the whole weight. There are some hub or mid-mounted motors on the market which are gentle, however not as gentle as he wanted them. So he turned his consideration for one thing that’s been round for years: friction drive, the place a powered curler is pressed in opposition to the rear tire, making it spin.
Dr. Freiburg took the brushless motor from a mannequin helicopter delivering 660W of energy and used it on the Freicycle. When the motor is on, the swing arm on which it’s mounted drops the curler onto the tire and its abrasive sleeve has sufficient grip to show the wheel. When the motor is off, the spring-loaded mechanism pulls the curler off the wheel.
As a result of Dr. Freiburg lives in Germany, the bike has been electronically restricted to 250W and 25 kph (15.5 mph), however he says it will probably attain high speeds of 48 kph (30 mph) with out the constraints. In contrast to with commonplace e-bikes, the load on this one makes it as straightforward to experience in non-assisted mode because it’s in motorized mode.
One other problem with the bike was the battery, as a result of Guinness calls for a 137-Wh battery with a view to set up any file within the e-bike class. So Dr. Freiburg constructed a battery inside a water bottle, which is he then positioned in a 3D-printed cage on the seatpost. The battery, he says, is sweet for 19-35 km (12-22 miles), however the rider can at all times carry a secondary “water bottle” for additional vary. The lid on the bottle turns the battery on and off, and will also be used to set the pedal help ranges.
Since this was a motorcycle constructed for science (and Guinness) and since Dr. Freiburg had loads of backup from companions just like the TU Dortmund College, Karlsruhe Institute of Know-how, Velotech and Merida Bikes, cash was not a difficulty.
The overall value of the Freicycle shot as much as €20,000 ($23,866 at right now’s change charge) which, sure, is a ton of cash. And it additionally hints that this will by no means transcend this challenge stage.