Tuesday, February 7, 2023
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Physique Rocket’s drag measurement package claims to be a “wind tunnel in your bike”

The Physique Rocket is a brand new sensor package that’s designed to measure drag in real-time, serving to you obtain optimum positioning in your bike in any state of affairs. By combining sensors on the seatpost, handlebar, and pedals, it measures velocity, weight, energy output, and extra to provide you a reside CdA determine proper in your Garmin biking laptop, letting you see instantaneous suggestions in your place.

The system is looking for funding within the U.S. and simply closed a €439k European funding spherical. Former hour file holder Alex Dowsett is amongst their advisers and buyers, they usually’re working with a number of prime street and triathlon professionals and coaches. Right here’s the main points…

How does Physique Rocket measure drag?

body rocket drag measurement graphic

The distinction between Physique Rocket and different methods that we’ve seen  is that it’s utilizing a number of elements to measure all kinds of forces. Thus far, on-bike drag measurement has come from a clip-on air strain sensor with piton sticking off the entrance (see Notio, SwissSide, AeroPod and Velosense).

These methods measure the system drag of the rider + bike, supplying you with a complete CdA quantity that mixes drag created by your physique and the bike itself. Physique Rocket says that makes it tough to isolate the affect your physique is making versus a part swap, the place you might concurrently change your driving place barely.

body rocket drag sensors on the bike

As an alternative, Physique Rocket locations (at the least) three sensors on the bike, one every below the saddle, handlebar, and pedals. This isolates the rider from the bike and provides different metrics to the info.

Physique weight is one in every of them, as is downward pressure. This lets them see how your modifications in weight (sweat loss) over long-distance occasions change your CdA quantity. It additionally reveals them how you modify your physique place and weight steadiness between saddle and handlebar…not simply micro changes to remain comfy, however how you might favor one leg or one other, weight the bar on assaults, climbs & descents, and so on.

Additionally they measure horizontal forces, telling it how a lot the wind is pushing (or drag is pulling) you backward in relation to the bike.

prototype body rocket drag sensor on a bike

And, hiding in there someplace are air strain and wind velocity sensors, however they are saying they’re going to be refined and slimmed down (and is perhaps an extra half that’s added to the bike, which is what you see on a few of their check bikes.

body rocket drag sensors for bicycle pedals

The system continues to be in improvement, so these photos are renderings and the appear and feel might change…and there’s no present clarification for a way these pedal inserts (platforms?) work aside from that no, they don’t add stack peak, and “the pedal sensors are literally constructed into our proprietary pedal system which varieties a part of the whole system”.

So, no, you possibly can’t use your individual pedals, however their system can have a inbuilt energy meter, so that you don’t want so as to add one to your bike simply to make use of this. They’ll be suitable with Look cleats initially.

They are saying there are two totally different stem or handlebar choices deliberate, however initially it’ll be targeted on aero extensions for TT, monitor, and triathlon purposes.

chart showing what the body rocket system measures on a bike

Goal worth vary is between €1,500 to €2,000, with a objective to launch it in mid to late 2023. For now, they’re inviting events to contact them straight for funding alternatives.




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