In article , "Matthew S. Whiting"
writes:

However, enter a climb and you were toast.


Like...a missed approach.

- Andrew


Bingo. And the only vacuum failure I ever had was during climb-out
right before entering the soup, where the standby system likely would
have been useless.

Not really so. I can hold level at 8000 and climb at 400 to 500 at 3000 while
getting 3 inches of vac with the precise flight standby vac. So it depends on
the alt of the airport. Here in Ohio we don't have those 5000 ft airports.

Chuck