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Erratic Oil Pressure 912ULS

  • Wm Hertzel
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4 months 5 days ago - 4 months 5 days ago #18052 by Wm Hertzel
Erratic Oil Pressure 912ULS was created by Wm Hertzel
Some of you may recall This Thread from last spring.

While it may appear that it the thread suddenly went Quiet, much has happened in the interim.
John, Alex and I have been working on a solution to the problem.

We have found that the underlying problem is that the Oil Pressure Regulator Valve is prone to fluttering in the oil stream in some engine installations.
While the Rotax design looks quite reasonable, once the Valve Opens and moves away from the Valve seat, there is no longer anything stabilizing its position. It is free to become a "Bobble Head" if it wishes.



This is evidenced by the wear marks on the side of the stem of the Mushroom Style Valve.



After more than a dozen design changes and over 60 hours of in-flight testing, we think we have an elegant solution.
The new valve is a simple drop-in replacement for the current valve and requires minimal effort to replace.
The end result is Rock-Steady Oil Pressures that varies very little over wide RPM and Temperature ranges.

What we are looking for at this time is one or two Candidates that would be willing to Beta-Test the New Valve in their 912ULS Powered Aircraft.
If you find the Valve beneficial, you will be welcome to keep the Valve for your personal use as compensation for your efforts.

If anyone has a 912USL Engine that shows the Oil Pressure Varying Rapidly in excess of 10 PSI (or Much More!) once at operating temperatures,

Please contact me at ... WHertzel1@Yahoo.com

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Last edit: 4 months 5 days ago by Wm Hertzel.
The following user(s) said Thank You: DHeal

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4 months 1 day ago #18076 by przemekmac
Replied by przemekmac on topic Erratic Oil Pressure 912ULS
This e-mail is not woking

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  • Wm Hertzel
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4 months 1 day ago - 4 months 1 day ago #18080 by Wm Hertzel
Replied by Wm Hertzel on topic Erratic Oil Pressure 912ULS
That e-mail has been working for more than 20 years.

Try again, or post your Email Address in the 'About You' Tab of your profile.
Or just post it here and I will contact you.

Bill.

Edit: I just noticed your GMAIL message came through. Never Mind! :)
Last edit: 4 months 1 day ago by Wm Hertzel.

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