Metered Orifice

[Whocares]

I'm reading a lot about the oil pressure line needing a metered orifice in the fitting off the engine to reduce fluctuations in the reading.  Is this necessary for the Dynon instrumentation?
Thank you.

 

[skysailor]

Even if Dynon can damp the pressure pulses you should consider using the very small opening. The line only needs to access pressure, there is no flow in the line. As such, the orifice can be very small. The primary benefit of this is that if the line were to fail, oil would be pumped out of the engine through this very small opening. Since your Dynon would have alerted you to low oil pressure (in the line) you might have time to get the plane on the ground before the engine actually runs out of oil and fails. Certified aircraft normally use a very small orifice in the oil pressure line when one is used for the same reason.

 

[Whocares]

I get it that one issue is the hose failing and more time to land. But there are several other hoses a whole lot bigger that can fail and make that issue moot, as a buddy of mine can attest...
I'd like to know more about the issue of instrument reading.

 

[dynonsupport]

SkyView does not need a restriction to filter out the variation in oil pressure. However, we still very much recommend the restriction for the reasons listed.