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I have a simple trick for that: I know the consumption of my car on a level road in 5th gear at 90 km/h, so when I'm in doubt about whether or not I'm going up,
by 0x12 15y ago
I have a simple trick for that: I know the consumption of my car on a level road in 5th gear at 90 km/h, so when I'm in doubt about whether or not I'm going up, down or level I look at the fuel consumption indicator.
If it is higher than 6.6L/100km then I'm going up, less is down.
If you don't have a fuel consumption indicator then that will not work but lots of cars have them these days and I think using them as a level is a useful unintended application.
- mkr-hn 15y agoThis is the first I've heard of fuel consumption indicators. What kind of car is it?
- 0x12 15y agoCitroen C8/Peugeot 807 (same car, different badge). It's built into the trip computer.
- apaprocki 15y agoAll car computers know this even if they don't display it to you. The computer directly controls the flow in the injectors and the computer knows their flow rate (unless you swap them out, of couse).
- dalke 15y agoFirst I saw was in a Saab 9000, around 1991.
- caf 15y agoMy Subaru Liberty has one.
- darklajid 15y agoNo offense intended, but this scares me. They are ~everywhere~ for a long time around me. Quite a lot of driving instructors (specializing in 'reduced fuel consumption' trainings) use them as a general guideline to "see" how your behavior drives the consumption up. Heck, mum and dad use that thing for years and drive even slower since they first saw that they could make their car use less gas. You need to get a new car.. :)
- mkr-hn 15y agoMy car is only 14 years old and still too reliable to need replacing, but I've seen a few newer cars with no fuel consumption gauge.
- apaprocki 15y agoAnother trick might be using star alignment. A fixed position camera on the top of the plane could sense pitch by tracking which stars are in view. Or similarly, if you boxed a sensitive GPS receiver so that it could not detect signals from the sides, the satellite IDs which are in view could possibly indicate alignment of the plane as well. The best model would tie in as many observations as possible to maximize the probability that it is right. EDIT: What about fuel sensors in the wing? If the computer knew the volume of the remaining fuel and the altitude was not dropping, it could determine the orientation of the plane if there were sensors inside the tanks to detect which were submerged.
- bobroberts 15y agoUnless the wind is blowing toward you.