Life-changing, dreamed contract just received!
I’LL DO IT!
More details soon…
I hadn’t seen Stelios for a long time, till I received a call from him some days ago. The project is on the design of an unconventional unmanned airship looking for technical report support and the proof of concept flying as soon as possible. The design objective is an airship that will be able to achieve performance and resistance to weather conditions which will surpass competition initially at low altitudes, with further development aiming for high altitudes.
Unconventional designs are always interesting, but they should be approached with a critical eye. So I do play devil’s advocate, not to hinder the development, but in order to raise those questions that might have not been considered enough or at all and I think that there is a big question mark in one of the basic flight areas.
All details are under an NDA till the project is presented publicly (hopefully…), so not much information can be revealed at the moment.
I am not sure whether I will have the time to fully contribute to this one, but when a guy drives for 5+ hours to meet you, invests his time and money on a potential “game-changer”, struggling to account for all details and trying to overcome his limitations, then I cannot ignore him.
Whether it works or not, it doesn’t matter. This is how pioneers are born…
The Cooper–Harper rating scale is a set of criteria used by test pilots and flight test engineers to evaluate the handling qualities of aircraft during flight test. The scale ranges from 1 to 10, with 1 indicating the best handling characteristics and 10 the worst. The criteria are evaluative and thus the scale is considered subjective .
This scale has been translated in many languages around the world from Test Pilot School students, but not in Greek. Whether it is needed or not, as I have receieved considerable training on its use, I considered creating the Greek version of the scale. A common issue with this scale is that pilots rush to use it with out first reading the descriptive report  (well, pilots are usually like that…) and as a result the ratings can be biased. Any how…
Be aware that the Greek version is not a raw translation, but some points require an aviation perspective in the translation; despite this the wording rules described in the report still hold.
Below the Greek HQR scale v.1.0. Contact me through my website for the .pdf version or any feedback on the scale.
 Cooper–Harper rating scale, Wikipedia
 G. Cooper and R. Harper. The use of pilot rating in the evaluation of aircraft handling qualities. Technical Report TN D-5153, NASA, April 1969.
Flying with a friend and enjoying the beauty of the Greek weather and islands… some of the very few things that remained in this country.
I am currently contributing in the testing for a mesh adapter release. Mesh adaptation is a computational feature that can be of significant value in many CFD cases. The initial grid is refined based on an initial solution and an improvement in accuracy can be observed at the regions that are computationally more demanding. The application though is not as simple as it seems, as mesh adaptation relies on smart algorithms that should be able to detect the regions that new grid points should be added (and regions that grid points should be removed!).
Below a case that was examined which regarded an adaptation around shock waves formed in a supersonic duct.
Spin aerodynamics and aircraft behavior still remains a grey area in aviation. A number of upright spins were flown from London, Ontario in order to investigate the spin characteristics for various control inputs. The first aircraft to be flown was the Giles together with aerobatic pilot MT. (More aircraft are planned to be span to complete the study).
Basic IMU instrumentation was installed on the aircraft for data collection. Significant differences were observed during left and right spins, aileron-in and aileron-out spins, and a flat spin that followed a tumble maneuver. In a 50-minute fight we completed 7 spins of 5 turns each as well as some basic aerobatics. The data is now waiting for analysis…