Aircraft turning performance – “Doghouse” plot

Multiple hour flight and delays on my way back to Canada, got to do some analysis of a classroom tutorial on turning performance. Part of it was the creation of a “doghouse” plot (indicating both sustained and instantaneous turning performance) for a fictional IF-35A. The doghouse is complete with the load factor and turn radius curves, and in a form which I consider to be appropriate for inclusion in an AFM.

There are few assumptions in the modeling performed to create this plot which may raise the eye brows of the most experienced readers of this blog… I am fully aware of those, but I will keep their identifications as a student exercise :)

(Shiba is there just for the joke of it, and to indicate why the shape of this plot is named as doghouse :)

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Back from Hamburg

Back from Hamburg and from an extensive day of testing. Overall I did well, but I don’t know if well enough to get me to the next stage.

There were tests I know I excelled, some others I did very good, some good and a couple of average. In the technical and math questions, my main concern was the time pressure. All subjects were within my capabilities, but for some I was not very sharp/fresh and that combined with the time pressure, the stress, the jet lag and even some ambiguous English language resulted in some slips which I though afterwards.

Anyway, overall I am satisfied and optimistic. I will accept any result positively.

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Stage 2 of the ESA Astronaut selection process

I got invited to Stage 2 of the ESA Astronaut selection process in Hamburg later in September and I am very happy just because I made it to this Stage.

I am aware of the very slim chances for success, but in the same time I am certain about how just my participation in this process will benefit me as an individual.

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My second article in SETP Cockpit Magazine

My second article published in SETP’s Cockpit Magazine. Cockpit Magazine is a peer reviewed journal created to share the lessons learned and milestones of the Society of Experimental Test Pilots.
The article looks in-depth in the wind-up-turn test technique flight dynamics and the effect of engine thrust.

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40th birthday sunset

Santorini, GR

Staring at the sunset on my 40th birthday sipping a glass of Assyrtiko, filled with awe and gratefulness, feeling blessed for every single moment up to now.

I am not by myself any more. The person that took the photo is my dear co-traveler.

Let the new era begin…

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SciTech 2022 – Abstract reviewing

After more than a year of virtual/online events we are back at least to partially physical. Currently reviewing flight test abstracts for SciTech 2022.

From the position of an AIAA Associate Fellow I just feel it is my duty to contribute more to the organization.

(Oh! and 9th birthday of aeroscience!)

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Inspiration

The greatest adventure in history…

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MathCAD rocks!

I wished I had used this software much earlier for analytical calculations required in aerospace problems (definitely not by chance that Bjarni has been using this for ages…)

Anyway, better late than never.

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Thrust effect on lifting boundary as determined by a WuT

The following part is from an article I recently submitted to be published in the SETP Cockpit magazine and follows up an analysis I had performed few years ago.

To complete this analysis and quantify the effect of the thrust setting on ITR, a specific example is considered. The following figures (3 and 4) are analytically generated and correspond to a high-performance fighter aircraft assuming a 9g limit, a weight of 20,000kg, altitude 20,000 ft and max thrust at that altitude of 20,000lbs. The primary analysis considers a α_max of 50deg and δ=0 (Fig.3(a) and Fig,4(a)), and a sensitivity analysis is performed for α_max of 60 and 40 deg as well (Fig.3(b) and Fig,4(b)).

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Having fun flying for currency

Back into flying to get my currency up… all fun and good stuff!

Other than that too busy with multiple projects and preparations, as well as travelling internationally under harsh COVID restrictions…

Oh, and I love the take-off runway view!

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