Col Hajj
Recruit
Is there a consolidated list out there some place that gives data on various plane statistics like roll rate, turning radius, and other "maneuverability" stats?
Thank you,
Keith
Thank you,
Keith
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Check out some of the air combat simulator sites like the one above. I suspect some of them are pretty close to reality.
Gee, you think you could be a little more pessimistic?no way that any of the Sim designers have accurate data
You would have to be able to peel the math model apart to make that judgment - I see no way that any of the Sim designers have accurate data for drag buckets for each type, Hp to altitude, prop efficiency by altitude by a/c type, energy models which take into account the drag profile by velocity, trim drag for high deflection rudder/elevator, etc. etc.
In short some may be resonable at sea level in level flight, including climb as the standard aero performance sets are close - but it is a toss up at altitude for two stage engines, high altitude turn performance, true turn performance from SL to high altitude, effects of gross weight to the wing L/D as the ship nears stall profile.
Look at the enrgy and emotion expended in various debates here for example. without a drag bucket which looks somewhat lie a bowl with Drag on vertical scale and Velocity on the horizontal scale, you have no idea where to get Total Drag except for the far right at Max Velocity for a flight test - simply because Thrust is totally balanced by Total Drag (induced, parasite and form drag) - and you can calculate Induced Drag component at that data point.
But Parasite Drag is not linear and does not vary in a straight line as the airframe loses speed from top velocity -
You have to have a Drag Polar (bucket) for each aircraft as well as relaible wing section plots for both CL as f(AoA) and well as Cd as f(CL) for the wing on that airplane... These are minimum accurate data in hand to come close to performance calcs, particularly in turn performance
Good post. Fresh out of college, but with 5 years AF flying time behind me, I was assigned the task of computerizing max range performance of the F-5 for display on an Horizontal Situation Display. Going to one of the aerodynamicist with all my aeroperformance formulas in my head, I asked what were the formulas for fuel usage. I was quickly slapped down when the engineer, who was responsible for the flight manual data, stated that if he used formulas for the charts he would fired. He only used flight test data. So, I went to numerical analysis of graphs! As the Avionics Controls and Displays manager on the B-2, I had a major interface with the moving base B-2 flight simulator. The simulation of the B-2 was reported to be very good (I believe a lot of the flight control data was actually developed in the simulator and then programmed into the B-2 flight control computers) but I can tell you that Northrop Grumman spent a whole lot more money on the B-2 simulator programming, with a lot more talented aerodynamist, than a game company has ever spent on a game!
Dave - on top of everything else thrust for a jet engine is much more straightforward than a prop disk and drag interference is also more complicated for a propeller wash with the turbulent tube..even 'calculating' lift on the wing has its issues due to the signifcant amount of highly turbulent flow over the wing in the stream tube.
When you were doing your project your guy could have given you sfc for the engine on a test stand but it is a complicated task integrating the cruise equations as the airframe loses weight due to fuel consumption and the wing changes angle of attack as the weight decreases, etc, etc.
My eyes glaze over when the sim 'engineers' jump into these discussions..if Aero was easy everyone could do it.