Monday, January 20, 2020

Integration test using water manometer

If you follow this blog, you know that we've done extensive water manometer testing of our system, especially the pressure sensors. However, in our quest to knock off hypotheses about the IAS discrepancy in N291DR (and as a way to, coincidentally, also build confidence in the components of our system), we decided to do a quick water manometer test of the whole system. Sort of like an integration test. Never hurts.

Sorry that we don't have pictures for this one ;) but what we did is apply pressure to the dp0 sensor of the probe, in inches of water, and read off the IAS from the cockpit display. This tests the whole thing -- end to end. If we convert applied pressure to IAS in knots, and compare to the reading on the instrument, we conclude that the full system is working correctly.

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