# Body Rocket

Am I the only person out there who is confused by the Body Rocket? I read the piece on Feb 23rd, and have contacted Body Rocket with questions but have had no answers. How do they intend to measure horizontal force with a sensor? They give the equation for calculating CdA- it includes measurement of slope, gravity, and air pressure. Do the sensors measure these or make a guess? Gravity will be pretty easy but not the others. Anyway, if slope is zero and you're not accelerating, and you estimate air pressure as about 1.25kg/m3, the equation is basically CdA= 2F/1.25x velocity of air squared. Force is measured in Newtons. You get a power meter, so I presume this calculates the force, by dividing the Watts by speed in metres per second. So what are the sensors measuring? It must be wind speed, on three tiny sensors fixed to your bike. How do they do that- with a teeny turbine? Someone please help!! Because it sounds like a con to me.

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

• VIPcyclist 0 sec ago

I love victim blaming, I just love it,"' Ian Speed, defending, told the court: “The injuries were totally not intended, and could have been partly...

• Mungecrundle 5 min 26 sec ago

It was what the American airmen called the B52 Stratofortress. I've always been mildly amused when someone refers to being BUFF as a compliment....

• Argos74 21 min 18 sec ago

Anecdote is not data, but I just finished an hour of fasted ride in lycra shorts, hi vis hoodie and wooly hat, doing laps on the dual carriageway,...

• brooksby 2 hours 39 sec ago

So the complainant was arguing that you can't call something a tragedy because there's worse stuff happening? I'm not sure that language works like...

• Philh68 8 hours 39 min ago

The Macan is based on the Audi Q5, so they're (wall) kissing cousins.

• ktache 9 hours 36 min ago

Total lack of situational awareness from the buildinga nd the railings there...

• AlsoSomniloquism 10 hours 23 min ago

Yep, good job they didn't decide to pay back all the additional VAT for people who bought from abroad but whose bikes weren't ready until Jan for...

• Simon E 10 hours 27 min ago

Well done. Posting the same dumb thing over and over within seconds, reinforcing the stereotype of pro-Brexit voters as being both stupid and...

• madmicra 13 hours 14 min ago

It's slid on ok as you can see. I did find the part number of the edco lock ring that was supplier with the previous gen, which another group has...

• zero_trooper 13 hours 43 min ago

That car came… out of the blue. Thank you, I'll get my coat