Why? – – Why should anyone be interested in “recreational” bicycle aerodynamics. Well does “allowing you to go faster without using more energy” sound appealing?
I find it interesting that “aerodynamic” products are rarely researched further to make it the best it can be. Aero Wing products are developed by this rider/inventer that continually uses the product for personal use. A mediocre performance simply is not good enough. Aero Wing performance products are developed with practicality of daily use in mind as well as having a need for “easier speed”. Everytime I go for a bike ride, I’m always looking for refinement of Aero Wing products.
So “how much” can one expect using aerodynamics? Here is an example of comparative figures to help with those of you that wonder about “how much” benfit is expected by use of aerodynamics.
Let us set the stage first with an un-scientific example “me”. By using what I call the “comfort zone” a speed the rider can hold comfortably all day. As you review the results notice how the average speed moves up the mph scale significantly when aerodynamics is applied.
MTB bike – – 14 mph
Upright Cannondale bike – – 15 mph
Un-faired Tour Easy “TE” – – 16 mph (more comfort)
Front faired TE – – 18 mph
Bacchetta ti-Aero High Racer – – 19 mph
Body Socked TE – – 20 mph
Body Socked Gold Rush – – 21 mph (stiffer BB)
ZOX clone FWD lowracer – – 18 mph
Zephyr lowracer – – 19 mph
99% faired Varna Clone/Zephyr chassis – – 39 mph
Angletech Quadraped trike – – 15 mph (sits high)
Terra Trike Tour – – 18 mph (lowracer height)
Velomobiles like the – Mango – Strada – Quest – Milan all carry a “comfort zone speeds” of (28/30 mph) with open canopy – 32/34 mph canopy closed. Real time data from me driving behind, along side of these machines for nine days supporting Roll Over AMerica “ROAM” in 2011.
Keep in mind regarding the data listed above are “Comfort Zone” speeds for me – not racing speeds. I may be a competetor – but I am not a proclaimed racer.
The chart below pretty much says it all by comparing the aerodynamic drag differences of human powered vehicles.
Sorry for the poor resolution of the chart.
Notice the Easy Racer listed as .005 @ 75% compared to a fully crouched time trails postion of an upright rider.003 @ 73%. I concur these figures from years of riding an Easy Racer GRR. What is not mentioned “and should be” are the numbers “that are not” on this chart demonstrating what happens when a Easy Racer is fairied. The Easy Racer platform is designed to be faired. When a Easy Racer GRR is in an aerodynamic Body Sock configuration, it has the same .003 @ 47% coefficent “solo” where as it takes a paceline of four upright riders trading pulls to have the same numbers. So the Socked GRR has a pace line speed all by it’s self plus a comfortable body position. Hmm – says something for the power of aerodynamics. Also confirms – “allowing you to go faster without using more energy” statement at the top of the page.