So this does nothing to help with tailstrikes on landing, only work to “catapult” the airplane off the runway. Color me unimpressed.
Ok, I have now noticed how the bottom end extension also drops down on landing, but unless there is a serious downward force on that linkage, it will hardly help with a hard landing, tailstrike case. Time will tell.
I would "assume" (we all know what that does) that they would extend by gravity on approach and do the reverse of takeoff on touch down.
It seems from the video that the telescoping mechanism is automatic and doesn't "know" if it is extended for landing or it is taking off. It seems like the gear telescopes out whenever the gear is deployed and there is less than a certain weight threshold on it.
It points out that I don't really know the dynamics of what is going on at takeoff/touchdown time. Maybe I'm not alone on that.
The videos show on the takeoff roll that the wings are gradually developing lift so taking weight off the wheels. I imagine if the gear works like a hydraulic strut/shock the reduced weight allows the hydraulic fluid to enter via an aperture that limits rate of fluid flow. This means the gear will not rapidly compress if the weight should be reapplied, which is what you want. The opposite is true on landing: it's firmly extended on touchdown and then gradually compresses. The energy to move the fluid comes from gravity of the gear on takeoff and gravity of airplane on landing. Yet if this is not good enough, one could introduce a pump to move the hydraulic fluid, and that pump could be controlled by a microprocessor with various sensory inputs. I have absolutely no idea if such a pump is needed, since I absolutely suck at mechanics.
Where's a good mechanical engineer when we really need one?
Last edited by Revelation
on Thu Aug 30, 2018 11:15 pm, edited 1 time in total.