Fury's cockpit footage

[Mluvara]

Re: Fury's cockpit footage

Why Ground Speed jumps those miles so fast? due to air temperature, due to instrument sensibility, wind speed?

Indicated airspeed is from the pitot-static probe and is very stable. The ground speed is from GPS. There are several factors that affect the GPS. Basically, the GPS receiver that was being used for the telemetry is being pushed to its limits. With the aircraft pulling 3-4 G's, the system has a hard time calculating the speed because of the receiver dynamics. Add to the fact of banking, and the antenna is now looking at a different part of the sky. GPS is really good for straight line measurements.

The speeds that are 470-495 are appropriate for the flight. Others are errors due to the above mentioned dynamics.

If you add about 40-45mph to the IAS value, it will give you an approximate true airspeed.

Michael

[Inverted]

Re: Fury's cockpit footage

Michael go fly your Citabria today!!!!!!!!

[taglialavore]

Re: Fury's cockpit footage

Indicated airspeed is from the pitot-static probe and is very stable. The ground speed is from GPS. There are several factors that affect the GPS. Basically, the GPS receiver that was being used for the telemetry is being pushed to its limits. With the aircraft pulling 3-4 G's, the system has a hard time calculating the speed because of the receiver dynamics. Add to the fact of banking, and the antenna is now looking at a different part of the sky. GPS is really good for straight line measurements.

The speeds that are 470-495 are appropriate for the flight. Others are errors due to the above mentioned dynamics.

If you add about 40-45mph to the IAS value, it will give you an approximate true airspeed.

Michael

I would´ve never thought about that influence on the equipment, considering that they are all solid, without moving parts. Thank you very much Michael.

[Mluvara]

Re: Fury's cockpit footage

I would´ve never thought about that influence on the equipment, considering that they are all solid, without moving parts. Thank you very much Michael.

No problem! The dynamics of GPS are pretty interesting. Military equipment is much better. Its mostly all software and processing though, as the erroneous data points are just calculations from the receiver that come out.

Michael go fly your Citabria today!!!!!!!!

Yes, It was finally nice out today,so I took the Citabria out =)

Michael

[MRE]

Re: Fury's cockpit footage

Was that you I saw at the Ding a Ling today?