Elliot Seguin | The Cone - Airspeed Calibration - JellyBeanThorp @utopiasnow | Uploaded 4 years ago | Updated 1 hour ago
We had determined that there was likely a significant airspeed error and I had a hunch it was the newly installed pitot/static probe. So after getting a firm baseline with the original system we used a trailing cone to confirm the source of the error. The trailing cone confirmed the error was coming from the P/S probe, but more importantly from the static side of the probe. This gave us the confidence to move forward.
A trailing cone is a device used for pitot static calibration. The device consists of a drag cone that trails behind the airplane suspending a static probe. By positioning the static cone well behind the airplane the static measurement is less affected by the presence of the airplane itself.
I was trained on trailing cones at the NTPS (www.https://www.ntps.edu/).
The FAA provides some limited guidance in AC 23-8C "Flight Test Guide For Certification Of PArt 23 Airplanes", in appendix 9.
There are some drawings of trailing cones with dimensions that were released by Bede (27 & 28). bd5.com/BedeDesign27.jpg
Elliot's First Flight in the JellyBeanThorp:
youtu.be/HSjGD-TApMA
Pitot Static Baseline:
youtu.be/p8OC2VTQMnY
www.WasabiAero.com
We had determined that there was likely a significant airspeed error and I had a hunch it was the newly installed pitot/static probe. So after getting a firm baseline with the original system we used a trailing cone to confirm the source of the error. The trailing cone confirmed the error was coming from the P/S probe, but more importantly from the static side of the probe. This gave us the confidence to move forward.
A trailing cone is a device used for pitot static calibration. The device consists of a drag cone that trails behind the airplane suspending a static probe. By positioning the static cone well behind the airplane the static measurement is less affected by the presence of the airplane itself.
I was trained on trailing cones at the NTPS (www.https://www.ntps.edu/).
The FAA provides some limited guidance in AC 23-8C "Flight Test Guide For Certification Of PArt 23 Airplanes", in appendix 9.
There are some drawings of trailing cones with dimensions that were released by Bede (27 & 28). bd5.com/BedeDesign27.jpg
Elliot's First Flight in the JellyBeanThorp:
youtu.be/HSjGD-TApMA
Pitot Static Baseline:
youtu.be/p8OC2VTQMnY
www.WasabiAero.com
