F-35 HMD demo at OPL, Iowa


Short two day trip to University of Iowa on behalf of ITPS, in order to evaluate a Rockwell Collins F-35 HMD setup in an L-29 LVC simulation environment at the Operator Performance Laboratory (OPL). During the flight A/G and A/A scenarios were loaded demonstrating the operation and mode relevant symbology of the F-35 HMD, while in the same time, electrocardiogram (ECG) sensors were providing via telemetry real time assessment of the workload involved in the various phases of the missions. Additionally a hop was performed in an Mi-2 helicopter equipped with a LIDAR generating real-time obstacle cues on the HMD. Pretty cool flights and lots of lessons learnt on HMDs.


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Multi engine rating received


ME rating received flying a Piper P-23 Apache. Great experience. Flying on more than one engines and handling engine failure cases adequately raises flying skills to a higher level. Off to the next one!

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EAA AirVenture Oshkosh 2017


After 5 years (2012) back in Oshkosh for two days full of aviation madness, witnessing thousands of airplanes, latest technology, the Blue Angels and an Apollo night forum with Buzz, Lovell, Borman, Haise, Worden an others… (speechless)

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Evaluation flight in the Jet Provost


As part of an ITPS student project on the Jet Provost Mk.4, a qualitative evaluation flight of 1.5 hrs was assigned to me as the supervising instructor. Instead of performing a standard qualitative evaluation flight gathering comments and qualitative ratings, a more flight test engineering approach was followed, targeting the flight towards the collection of quantitative data. Possibly a presentation on the flight to take place in the next Annual SFTE Symposium. Following images include a sample of the raw data collected from portable instrumentation.

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TM demonstration and display optimization

A telemetry (TM) demonstration took place at ITPS facilities. In the mobile control room myself with the SETP Vice President monitoring relevant airplane parameters during a standard training test flight. The technical parts of data transfer and radio comms worked very well, but a number of deficiencies were identified on the monitoring real-time displays, to be fixed in the very near future.

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Back to basics: Vortex lattice method for stability derivative estimation

The Vortex Lattice Method (VLM) roots back to the principles of lifting line theory and is thus also limited by the incompressible, inviscid and irrotational flow field assumption.

Basically the method works on splitting the geometry to a number of panels and calculating the contribution of all panels in terms of velocity potential (φ) on a control point in each panel. The resulting velocity, in combination with the free stream speed (Vinf) and the Kutta condition provide a solution for the vortices’ strength (γ) and through the integration of those, lift and induced drag forces are calculated. An output of the VLM is the stability derivative estimation used for an initial assessment of the aircraft stability and flying qualities.

As with many other subjects, while this method is taught during standard aerospace courses, students most often lack deeper understanding due to not going through the method’s application principles by writing a part of the computational code required to solve a panel method problem.

Below some images of applying the VLM for a B737 model using the AVL program.




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Beach reading on the first man

Back to fatherland for short vacations, reading on the life of the first man and gathering inspiration to continue the trip towards my own moon.


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