Why is the LANDING GEAR TILTED? Explained by CAPTAIN JOE
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Published 2018-07-26
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Gear down, three green and let´s get started!
So let´s look at the different types of landing gears. The most common one out there is the single axle landing gear with a tyre fitted on each side mounted to a large strut. Mostly used on passenger jets such as the Boeing 737 and Airbus A320.
With increasing weight, you need more surface, so more tyres to evenly distribute the weight of the aircraft.
So if we look at the main landing gear of the Boeing 757, you have the main landing gear strut, which by the way is filled with nitrogen acting as a spring force and hydraulic fluids for dampening. Then you have the truck or boogie, and four tires in tandem pairs. But more importantly, for today´s topic, you see this little hydraulic actuator right here, the so-called truck positioning actuator aka the tilt actuator. This little actuator is attached aft of the main gear strut and pushes the rear wheels downwards forcing the forward wheels to move upwards as the truck is axially mounted to the main strut.
As the plane comes in for landing, the rear wheels touch-down first. The actuator holds up against the pushing force, otherwise, the rear tires could bounce up, slamming the forward tires into the ground. Once the weight of the plane presses the tires onto ground, a pressure relief valve opens up and the actuator collapses letting both tires touch down. This all happens in the split of a second. Once the actuator is fully compressed, so weight on wheels, it triggers the air/ground sensing unit from air to ground before the nose wheel has touched down, automatically extending the ground spoilers and allowing thrust reverser deployment and depressurizing the aircraft etc.
But see more in the video
Thanks for watching, all the best your "Captain" Joe
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All Comments (21)
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I’ve been an aircraft maintenance professional for 20+ years, and I can tell you that very few pilots have this much knowledge about aircraft systems. Troubleshooting discrepancies would be much simpler if all pilots were this well informed. I’m very impressed.
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comments: 1% about the video 4% about the video being 7 minutes and 47 seconds long 95% about why the heel was there
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As a retired airline pilot, I am amazed, despite their complexity, how durable and reliable the landing gear are. Respect to the engineering and maintenance that went into the sequencing of the gear doors.
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That was awesome. After spending 28 years as an electro-environmental tech, I loved it. Pilots are not required to know the details. If it didn’t operate properly, they have a checklist, can they continue, abort or IFE. As a private pilot student, it gives me more confidence knowing how things work. It’s an advantage as long as it doesn’t make you a cocky pilot.
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Haha dutchpilotgirls heels? Joe performed a consentful 'touch and go' last time she was there ;)
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What were you guys doing together when she forgot her heels ;-)
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3:59 The answer is so simple, you think I am Joe-King
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"The 777-300 is at great risk of a tail strike on rotation" 737-900: Hold my beer
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i think it is tilted so pilots can butter
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Antonov pilot when gear down: "600 green..."
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4:30, ahh yes, a 747 made of the strongest material ever, plywood
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Captain Joe: Explains everything professionally and is very detailed Also Captain Joe: "So the triple 7 300 has this big diagonal THING..."
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How does Dutch Pilot Girl leave one shoe behind Did she go home with one shoe??
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30% of the comments: appreciating the video 1% of the comments: Video length being 7:47 69% of the comments: About the highheels...
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He wa probably checking her flaps
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Thank you so much, this is such a learning experience for me. I am currently building a model 777, and was curious on its running gear, it's like my favorite. You've helped me understand it much more 🤗
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5:57 *raises landing gear while on ground [x-files theme plays]
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This is really helpful Joe! I've been on many 777-200s before, and never noticed this difference! Keep on making more videos!
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I wish he could be our physics teacher in our school. He explains so patiently. Lovely♥️♥️
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I'm glad you mentioned the C5. The first time I saw one up close at an airshow, when I was 15, I couldn't figure out how it fit in the wheel wells.
