Greetings to all,
months ago we stopped our work on this model. Actually called: Fiat G.91 R4 v.10109 - By the last R4 version number series produced after years. That pause was conditioned by a problem with our personal perspective we had on the licenses used by our project. All the licensing speech is born by me, probably. Your discussions has clarified your respective points of view that I greatly respect. Mine is that: For my 3D model and some FDM parts made by me, I use this License: Creative Commons, CC-BY-NC-ND 4.0 - If my plane is not within the canons of purity of GPL License - Patience. That's not my problem anymore. From my point of view, the use of mixed licenses for aircrafts like mine, will give the way to many great 3D artists, to be able to enter the world of simulation without the fear/anxiety of seeing their model sold by another person for another simulator. I would call it as a "protection" of the artist's work, rather than the programmer/coder job. Everyone couldn't be the best artist, or so skilled programmer like many of you on this Forum. This is a starting point for us - totally beginners; for our commitment that we spend into our Fiat G-91 R4. An italian airplane, made this time, by italian makers like us, more interested on the quality of our job. Me and abasign we cleared up between us months ago. Saying plain and simple we'll continue to do our work as we please and as we like to do. We'll always continue to use Flightgear for our personal purposes and airplanes case study, because it is a really beautiful and powerful simulator. Anyway other discussions about licenses we use and digressions that will go off topic the development of the aircraft will be considered absolutely not relevant and absolutely no longer acceptable. By this time I'd like to speak only about our plane. I'm sure you will understand perfectly! It's time to restart with some history about our plane:
The Fiat G.91, was a single-engine jet fighter-reconnaissance arrow wing designed by Eng. Giuseppe Gabrielli and produced by the Italian company Fiat Aviation. The G.91 is a low-wing monoplane, with arrow configuration with a 37 ° angle; the fuselage, with a half-shell made of light alloy, supports the engine in the rear trunk, immediately in front of which are arranged the fuel tanks and housings of the landing gear. In the forward section of the passenger compartment is arranged, under which is positioned the dynamic air intake for the engine; the pilot station was equipped with an ejection seat Martin Baker Mk.3 that it was later brought to the configuration 0 and 0 share speed, thanks to a pack of inferiorly arranged rockets which led him to a share such as to be able to open the parachute and let back ground the pilot without damage with the aircraft stationary on the ground. Machine guns (or, depending on the version, the cannons) are arranged next to the air intake under the cab and at the bow are mounted cameras and the same control equipment. The tail planes over the empennage are also compounds from a ventral fin of reduced size. Cart is front type tricycle: the front leg, in withdrawing backward, rotates 90 ° and the wheel is fitted flat below the air intake; the rear legs are space in the wing panels, with the wheels, retracting inwardly, are housed in the fuselage. Depending on the version, the wing panels are hooked two or four pylons which you can apply to fuel tanks or war loads (typically unguided bombs or rocket launcher). Throughout its lifetime the G.91 was powered by the Bristol Siddeley Orpheus turbojet (the same engine that powered the Folland Gnat). The prototype was equipped with a turbojet engine derived from that used for a surface-to-surface missile. For this reason it had a life span of only 300 hours (TBO) at the end of which was to undergo a general overhaul. With an excellent weight / thrust, it had a complex of parts comprising fuel adjustment system variously located on the engine. Characteristic the starter system that occurred at the hands of a small turbine driven by exhaust gases from the combustion of a charge of cordite.
Dimensions and weights
Length 10,29 m
Wingspan 8.56 m
Height 4.00 m
wing area 16,43 m²
curb weight 3100 kg
Maximum take-off weight 5500 kg
Propulsion
Bristol Siddeley Orpheus turbojet engine 803-02
Thrust 22.26 kN
Performance
max speed 0.78 Ma (1075 km / h at high altitude)
Autonomy 1150 km
Tangency 13 260 m
Armament
4 machine guns Browning M2 12.7 mm
Bombs free fall: up to 2000 kg
Missiles rockets: 38 SNEB 68 mm
4 underwing pylons
More updates about the Fiat G.91 R4 v.10109 - JSBSim will come soon... Thank you!
"According to the laws of aerodynamics, the bumblebee can't fly either, but the bumblebee doesn't know anything about the laws of aerodynamics, so it goes ahead and flies anyway."