What level of negative pressure?

[Flyn]

Hi. If I wanted to use a small petrol engined fan or propellor to
create a low vacuum in a container, what level of negative pressure
could I reasonably expect to achieve? I know it's going to be dependent
on fan or propellor type, size and engine power but let's assume the
prop is a conventional 2 bladed model aircraft type approximately 18"
in diameter. The engine would be of appropriate power for such a blade.


I'm not looking for a deeply scientific answer given the vague nature
of my definition but could I get at least -3psi from such an
arrangement?

Any feedback is welcomed and much appreciated.

Flyn

[R. Wink]

It's been my experience that a commercial fan provides about 2-3" WC draw. Vacuum pumps, on the other hand, can draw to near
perfect vacuum. What kind of volume are you expecting?
R. Wink

Post by Flyn
Hi. If I wanted to use a small petrol engined fan or propellor to
create a low vacuum in a container, what level of negative pressure
could I reasonably expect to achieve? I know it's going to be dependent
on fan or propellor type, size and engine power but let's assume the
prop is a conventional 2 bladed model aircraft type approximately 18"
in diameter. The engine would be of appropriate power for such a blade.
I'm not looking for a deeply scientific answer given the vague nature
of my definition but could I get at least -3psi from such an
arrangement?
Any feedback is welcomed and much appreciated.
Flyn