If you had a constant speed prop, it would have failed to a
high rpm and you would have probably had to reduce power to
stay under redline.

This might have happened before the gauge showed no oil
pressure.



wrote in message
...
| "Jim Macklin"
wrote:
| Not necessarily, the oil pressure gauge lines are very
small
| to prevent a major leak if the line breaks, in cold
weather
| or just with cold oil, the gauge will respond slower.
That
| is one of the reasons they say to allow 30 seconds for
oil
| pressure to show up after a start, it takes some time.
|
| But a stuck relief valve will cause the oil pressure to
go
| very high instantly and that blows the seals or oil
cooler
| which drops the pressure before the gauge has time to
| respond.
|
| My gauge didn't respond until 5-6 minutes into the flight,
but the
| cooler obviously split on start-up, as there was a huge
puddle there and
| another in the run-up area (and no, I had never been
taught to look
| behind when I pull away to assure there are no puddles,
though I sure do
| NOW! ... how many pilots that have not had an
incident/accident like
| this routinely do this?). The oil pressure gauge remained
in the normal
| position throughout start-up, run-up, takeoff, climb-out
and during the
| first couple of minutes of cruise; then it read zero
pressure.