Misleading Notam

"Gary L. Drescher" wrote:
A hundredth-degree change in descent angle is
(barely) perceptible on the ASI or VSI.

I'd like to see a pilot or VSI which can notice the difference between
500 fpm and 502 fpm.

"Roy Smith" wrote in message ...
"Gary L. Drescher" wrote:
A hundredth-degree change in descent angle is
(barely) perceptible on the ASI or VSI.

I'd like to see a pilot or VSI which can notice the difference between
500 fpm and 502 fpm.

It's not even that much.

However, the charts always show the glideslope to the 100th. They never
show headings to that accuracy. If he'd actually looked hard at the chart
as to what they were changing, the fact that the elevation (which is depecited
on the chart in the same location) also changed would have been a big clue.

"Roy Smith" wrote in message
...
"Gary L. Drescher" wrote:
A hundredth-degree change in descent angle is
(barely) perceptible on the ASI or VSI.

I'd like to see a pilot or VSI which can notice the difference between
500 fpm and 502 fpm.

You're right, it would have been more accurate for me to say a *few*
hundredths of a degree. But that still justifies more than one decimal
place of precision. A few hundredths of a degree change of descent angle
moves the VSI needle almost as much as a one-degree heading change moves the
HI (and courses are routinely specified with single-degree precision).

--Gary