Professional Career Aircraft Projects
job got into was as an aeronautical engineer at "a" famous Dutch Fokker
on, got into extensive methods developing on preliminary aircraft design.
Particularly for very advanced EVAERO aerodynamics with up to 5% accuracy
including low speed aerodynamics. Without CFD! Design methods evolved up
till the stage that rapid sensitivity studies on various designs could
be performed. The accuracy was so good that complex CFD calculations and
windtunnel results could be verified on general accuracy by using preliminary
design methodology. Methods were based on empirical, experimental data
and plain reasoning ! And that looks more simple than it is! The ADA language
programmed computer program used a few thousand formulas and these were
derived from not only available methods, but also by using my own methods
developed that were base on hundreds on test data and industry data to
evolve into EVAERO.
Projects, projects, which ones?
was a high Mach number regional airliner (Mach 0.72) family with 80-105
passengers. Advanced propulsion consisted of two "free turbine" engines
with counter rotating props with swept composite blades. Engine configuration
was checked with Rolls Royce, a well known engine manufacturer.
one of the first
CAD models (CADAM system)
was a 95-130 seat airliner family (Mach 0.78) with several variants being
studied. One variant shown here is an version without slats but very high
aspect ratio wing (12). It had an advanced wing that offered same performance
as many conventional slatted aircraft in existence today. A careful balance
was made on desired high speed (low Mach dragrise and low induced drag)
ande low speed (high CLMAX). Full Reynolds effects were estimated including
effects on local peak pressure in both high and low speeds. The L/D ratio
was extremely well without using any new technology surface roughness manufacturer
Projects P1 and P2 took over 6 up to 14 months and some designs were checked in windtunnel testing. Test results were so good that some people really got scary!
last update this page November, 2015
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