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>>928448

You will have issues getting a reliable reading, as the tanks tend to be small (in volume) and prone to fluid level changes due to flight attitude.

Most light aircraft, the fuel gauge is a suggestion at best, and fuel remaining is based on knowing the volume of fuel consumed at the desired power setting.

TL-DR?

Use a watch.

>>928470
Basically to do this : I have 5 liters and engine consumes 3.2 liters at 7000rpm/h. i have a little more than one hour. Is that it?

>>928475
Basically, except you have ~1 hour of total op, so your radius is 25 minutes with a 5 minute cushion.

Think flight time, and not fuel time.
Even though you're in a paraglider, you don't want to go wetfoot or hug a tree, because you thought you had a few more ml of fuel.

>>928478
If I run out of fuel I can glide though, that's what's cool about a paramotor

>>928480
Yeah but not for very long (unless of course you happen to run out in the middle of a thermal)

>>928448
And there is the issue of scuba pressure gauges being 200 or 300 bar....

>>928478

In maritime we don't even risk that close of a buffer. Smaller tanks we check operational range by including a buffer of 1/3 of run time.

>>928490
You try to avoid thermals in PPG