Pilatus trainer aircraft

Project Information

Year: 1995
Duration: November - May 1996
Customer: Pilatus Switzerland
Contact Person: Juergen Dresel

Summary

The aim of this project is to select suitable antenna types and antenna mounting positions on the Pilatus trainer aircraft. This is an antenna placement study for the V/UHF communications antennas, the V/UHF navigation antenna, the UHF TACAN/DME and IFF antennas as well as the GPS and Radio Altimeter antennas.
Latout and evaluation of airborne Antennas in the frequency range 30MHz to 4.4 GHz, mounted on the new Pilatus Trainer.

Project details

Frequency range 100-150 MHz. Outputs as on Dakota transport aircraft. We required a more advanced version of the SuperNEC program because of the size of problems we were simulating and we rewrote our own program called "SuperNEC" in the C++ computer language. We introduced a new iterative solution method which produces results in the order of number of segments squared rather than the normal NEC2 where the computer time grows as number of segments cubed.

We also converted the program to run in parallel on workstations which are linked by an Ethernet LAN. In this way the program was run on 5 workstations in parallel (3 SUN10 and 2 IBM RISC 600 workstations) which had a combined memory of 5x64 MByte = 320 MByte RAM for storing the matrix.

Photographs above are of the Pilatus Trainer in flight and the copper scale models that were used to do measurements in the anechoic chamber.

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