In other words, when the take-off roll begins, do the numbers switch really really fast like this: 123456789 and so on.....or, since the IRS gatheres the ground speed information from a satellite, do the numbers switch or "lag" like this: 1 3 8 10 18 23 36 47 59
So, what I mean, I have this handheld GPS unit, it measures the Ground Speed very slowly when I accelerate...So, it would start its ground speed measurements like this...
1 and then after a few seconds later....25.....then a few seconds later....32...then a few seconds later.....44...then a few seconds later....55...and so on....
So, on an aircraft like in the picture where it shows "GS" does it measure the same way as my GPS unit that I have or, does it measure the speed (during take-off roll) more faster like this: 123456789 and so on????
Please help on this...I would appreciate it.
Photo © Guy Daems - Brussels Aviation Photography
ALso, one more question.
The GS indicator in the picture above, does that measure the speed the same way as we see the speedometer meter in our cars?? Is this the same?