tailwheel vs trike has nothing to do with nose angle on takeoff and speed to lift off. Compare the following aircraft if you don't believe me; Vans RV-7 Vans RV-7A Both takeoff at the exact same speed if flown correctly. Both can lift off with the exact same nose high attitude. Both can accelerate to a higher speed using a nose low attitude. Both stall at the exact same nose high pitch attitude for a given airspeed. Takeoff speed is a function of the stall speed and nothing else. Also, tailwheel pilots who do STOL flying, like to lift the tail into a nose low attitude on takeoff, even though it has been proven many times that the nose low attitude results in shorter takeoffs.
a tricycle gear airplane absolutely can nose over with hard braking and misapplication of controls, we call it "wheelbarrowing". Just less likely to happen in general is all.
Great job! I really like the detailed and to the point technical tidbits (angles, distances, ..etc.) very useful and clearly explained visually as well. Do you recommend any specific software for landing gear design and testing? Especially for simulating stresses "in-motion". For example, deployment in very high airspeed? Most software can only test them while fixed in one position and doesn't support animation. Thank you very much,
I don't know any specific software that can simulate stresses "in-motion". Usually, engineers analyze structures by using NASTRAN and Femap to look for Von-Mises stress and max principal stress for example, but as you said, they test structures while fixed in one position. However, you can always analyze your structures with the maximum applied load, and when you design your structure, use safety factors to keep your structure stress way below failure. Also, be aware of fatigue that can happen to your structure after a certain cycle of life. In this case, you will also need Damage Tolerance Analysis.
thanks
Great information. Just what I needed to know. Thank you
tailwheel vs trike has nothing to do with nose angle on takeoff and speed to lift off.
Compare the following aircraft if you don't believe me;
Vans RV-7
Vans RV-7A
Both takeoff at the exact same speed if flown correctly. Both can lift off with the exact same nose high attitude. Both can accelerate to a higher speed using a nose low attitude. Both stall at the exact same nose high pitch attitude for a given airspeed.
Takeoff speed is a function of the stall speed and nothing else.
Also, tailwheel pilots who do STOL flying, like to lift the tail into a nose low attitude on takeoff, even though it has been proven many times that the nose low attitude results in shorter takeoffs.
a tricycle gear airplane absolutely can nose over with hard braking and misapplication of controls, we call it "wheelbarrowing". Just less likely to happen in general is all.
The designer of the Bf 109 should have seen this video
Great job! I really like the detailed and to the point technical tidbits (angles, distances, ..etc.) very useful and clearly explained visually as well.
Do you recommend any specific software for landing gear design and testing? Especially for simulating stresses "in-motion". For example, deployment in very high airspeed? Most software can only test them while fixed in one position and doesn't support animation.
Thank you very much,
I don't know any specific software that can simulate stresses "in-motion". Usually, engineers analyze structures by using NASTRAN and Femap to look for Von-Mises stress and max principal stress for example, but as you said, they test structures while fixed in one position. However, you can always analyze your structures with the maximum applied load, and when you design your structure, use safety factors to keep your structure stress way below failure. Also, be aware of fatigue that can happen to your structure after a certain cycle of life. In this case, you will also need Damage Tolerance Analysis.