I'm testing two props. I've done several flights where I've climbed to altitude, gone level at four different power settings, descended to another altitude, repeated the power settings etc. I've recorded all this on my GRT EFIS. I've taken this data and converted to TAS at those density altitudes.
My question, is comparing the data. I have data for specific density altitudes with each configuration. But the density altitudes are not the same because each day was different temps, baro press etc. To compare two data points, I think I have to take the TAS and density altitude and convert to EAS at SL. Then take the difference in EAS at SL, convert back to TAS at the density altitude to see the difference in TAS. Does this make sense?
I found the CAS/Mach/TAS/EAS converter at www.hochwarth.com that I have used to convert from TAS to EAS and then take the EAS difference and convert back to TAS at altitude.
Is this valid? Is there a better way, other than flying the second flight at the same DA as the first?
Thanks
Jim Butcher
My question, is comparing the data. I have data for specific density altitudes with each configuration. But the density altitudes are not the same because each day was different temps, baro press etc. To compare two data points, I think I have to take the TAS and density altitude and convert to EAS at SL. Then take the difference in EAS at SL, convert back to TAS at the density altitude to see the difference in TAS. Does this make sense?
I found the CAS/Mach/TAS/EAS converter at www.hochwarth.com that I have used to convert from TAS to EAS and then take the EAS difference and convert back to TAS at altitude.
Is this valid? Is there a better way, other than flying the second flight at the same DA as the first?
Thanks
Jim Butcher