Re: Discrepancy between odometer and sat nav
Posted: Tue Sep 28, 2010 2:21 pm
If it's a vertical hill and you travel forwards, you will find it's a bit like banging your head against a brick wall 
Total misunderstanding on my part scanner - I do apologise.scanner wrote:Well there is where you are going wrong ..........
I said a mile TRAVELLED uphill, so now redo your diagram with the slope of the "hill" as the 1 not the horizontal and vertical distances.
Perhaps I should have said "it sees you travel 0.8(ish) of a mile whereas the side view and the odometer shows you have actually travelled 1 mile".
Where did you get the idea I had driven 1.414miles up the hill? I didn't say that.
I'm not disagreeing with Pythagorus
Somebody has broken his triangle 
How intriguing is this? (no really, i was determined to fully understand all this rather than just click off the thread with unanswered questions) I just demonstrated the principle to my daughter (she was wondering what i was doing with my arms) I'm lay on the floor here with my laptop in front of me. Whilst still lying down i raised my left arm (elbow resting on floor) straight up, then lay my right hand on the floor with my fingers touching my left elbow, now raise your right arm to a 45 degree angle (simulating a 1 in 1 gradient) You'll notice that your fingers are quite a bit short of touching your other fingers, thus more distance needs to be travelled to make the fingers meet. Yep, follows the maths, which of course MUST be correct, maths is always correct, but not always implemented correctly.