Originally Posted by Vans101
Does anyone have the spreadsheet that has blank fields for data that needs to be acquired and I ask because the PEC spreadsheet that the Test Pilot School is already filled out so I was looking for something that made the data points obvious.
Also if you perform this test protocol at only one altitude and only one airspeed then there could be significant static port location errors based on different IAS due to the the different pitch attitudes and or boundary layer turbulence from high speed to low speed so the questions is...I presume you want to do this test at the same altitude but at a number of different IAS from VS+5 to whatever the airplane can maintain with max power in level flight.
The GPS-PEC from NTPS is basically the correct way to do this. I have a version of it I modified to only have the 4-leg version, that I have posted here:
You can save a copy locally, but you still have to fill it out and fly it. Each test point is a different KTAS point, so record all of the pertinent information (temperature, altitude, indicated airspeed, barometer setting, etc)
Yes, in general this should be flown at a range of altitudes to verify the data. Essentially what you are looking for is "is my static port influenced by airflows at certain speeds or angles of attack and giving me errors?" I will hazard a guess that most people never even bother to determine their pitot-static error at any speed, much less a range. But I found it very informative to fly from as near stall as I could to WOT at three different altitudes (~1000 ft, ~8000ft, and 12,000). What I found was my error at stall at any altitude was nearly zero. My error at WOT was ~13 knots optimistic (displayed 180 KTAS, actual 167). I've been adding steps to my pitot ports since then trying to dial it it. Getting closer, but still not perfect.