The trend towards optimised aerodynamics is producing strange results - a new aero backpack deserves a prize for the most bizarre invention. A rucksack filled with air is offered under the model name Ram Air Fairing (RAF). With its long tail, it is said to significantly improve aerodynamics and also increase safety as an "airbag". "Experience a new level of cycling efficiency with our state-of-the-art, air-filled backpack, carefully crafted to revolutionise your riding experience," promises the Kickstarter page. The product video promises a reduction in air resistance of 19.6 per cent. A fantasy figure whose calculation is not disclosed. It would also be interesting to see how the airbag behaves in crosswinds.
The advertising promises sound promising: "Our backpack is a beacon of innovation and practicality like no other on the market. Combining cutting-edge technology and user-friendly design, it offers a unique accessory that will make you stand out from the crowd on the road." Will a giant air-filled aero backpack just make you stand out from the crowd or make you more of an aero clown?
Aero backpack on Kickstarter
The RAF is not yet available to buy. In October, money for the 300 g lightweight aero backpack is to be raised on the Kickstarter crowdfunding platform and production is to start in November. However, there may be so much headwind that the campaign is cancelled altogether.
The makers from Hong Kong do not even rule out its use in cycling races: "While compliance with the regulations depends on the rules, you can be sure that our backpack prioritises safety and performance. We recommend contacting the race organisers for approval of the equipment."
A starting field full of riders with air-filled rucksacks - who wouldn't laugh heartily at the thought? We ask ourselves the question: are the inventors really serious, or is the aero backpack a well-planned satire?
Real aero tips can be found at TOUR
You can become really fast if you take care of all the components of resistance and optimise your posture, clothing and material. Ideally in this order. The rider causes much more Air resistance than the wheel. The first and biggest step towards faster riding is therefore to reduce the frontal area: head down, arms inwards! Leaning on an aero handlebar would make you even faster - but this is only permitted in time trials.
Savings at 35 km/h: approx. 54 watts -> 3.9 km/h faster
Kristian Bauer
Editor
