Unusual technical questions

[ldrcycles]

Such as: if i'm riding into a 10kmh headwind and doing 27kmh, is that the same as doing 37 in still air? I am cursed when it comes to headwinds so that's how i deal with it mentally lol.

[Chef]

Fair enough - but make sure you deduct from your speed when you have a tail wind

[goneriding]

... tail wind

There's no such thing!

[BarryTas]

my bike computer "random" stops working. It's not going up or down hill just in some "random" spots or zones. I "random" as it always happens at the same seemingly unrelated spots. I blames the magic, ninja, alien fairies

[you cannot be sirrus]

If my average speed is 30km/h and I cycle with a tailwind at 35km/h, why can't I ride into the wind at 25km/h?

[Alex Simmons/RST]

Such as: if i'm riding into a 10kmh headwind and doing 27kmh, is that the same as doing 37 in still air? I am cursed when it comes to headwinds so that's how i deal with it mentally lol.

Head and tailwinds are not linear scenarios.

i. power required to over come air resistance is proportional to the (square of relative air speed) x (ground speed)
ii. power required to overcome rolling resistance is proportional to ground speed

so
in case of i, while the relative air speed is same in each scenario, the ground speed is not, and
in case if ii. the rolling resistance is lower at slower speeds.

[BarryTas]

Such as: if i'm riding into a 10kmh headwind and doing 27kmh, is that the same as doing 37 in still air? I am cursed when it comes to headwinds so that's how i deal with it mentally lol.

Head and tailwinds are not linear scenarios.

i. power required to over come air resistance is proportional to the (square of relative air speed) x (ground speed)
ii. power required to overcome rolling resistance is proportional to ground speed

so
in case of i, while the relative air speed is same in each scenario, the ground speed is not, and
in case if ii. the rolling resistance is lower at slower speeds.

science!!!

[snark]

If my average speed is 30km/h and I cycle with a tailwind at 35km/h, why can't I ride into the wind at 25km/h?

No idea about the "why", but here's a recent example curtesy of the weather bureau and a Garmin Edge 500: With a 20km/h north wind, I was sitting between 35-38km/h heading south over a reasonably long section of road and 23-36km/h heading back on the same section of road (on a road bike with 23mm tyres). If someone does the math, let me know if that's expected .

Cheers,
Simon.