Video: Ultra Slow Motion (1200 fps) Of A Boeing 777 Burning Rubber!
Friday, February 8, 2013 at 08:36AM
Have you ever wondered what the landing gear on a Boeing 777 looks like at 1200 frames per second as it makes contact with terra firma? Well, wonder no more! This video offers up a fascinating look into the world of rapidly accelerating rubber! You also get a really cool view of the fan on the right engine spinning in the opening sequence. It's all very, very cool stuff to see in my opinion.
I do need the help of someone smarter than me tho to figure out why the front wheel and tire of the right gear leg makes contact with the runaway and starts to spool up before the center wheel and tire. Maybe it just has more tread on it and is actually a slightly larger diameter? Anyone have ideas on this?
Lastly, I'm just really glad that youtube doesn't have a 'smell' app to go along with the video : )
Video screenshot of a Boeing 777 landing: where the rubber meets the road runway : )
Reader Comments (5)
Another great video, Martt. I'm not positive, but it looks to me as if there is a linkage in the gear that allows the front and rear wheels to hang a little lower than the center. I think that would make it easier on the strut, since those wheels would be "planted" before the strut begins to get major loading.
If you watch the video in real speed, you can see that the gear slams down pretty hard on the rear tires and then it looks like the rear of the truck bounces back up a bit which I assume puts a bit more pressure on the front of the truck as they are pivoted in the center.
At least that is what it looks like to me.
I asked my dad once (a 30 yr AA pilot) why they didn't have some motors in the wheels to spin them up before contact. He told me that they had indeed experimented with something along those lines but the added cost and weight didn't justify their use.
It would be interesting to see a video of the A330 as their gear hangs way down on the back. Or, a 767 as their gear hangs front down a bit.
Terrence- the slow mo and the real time are not the same landing or airline. I'm on my way to the Hobbico e-rest right now but I'm gonna try to get more info on all this when I can : )
My GUESS is that the trucks are designed with some upward bow in them. This results in the front tire contacting before the center, but it will more evenly distribute the force when the full weight of the aircraft is applied, flexing the truck frame until all three wheels are in contact. Otherwise, the center tire would have greater stress than the front and rear when under load. Bridge spans, highway truck flat beds, and many other structures are similarly designed to have an upward bow when under no load, which straightens out when a vertical load is applied.
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