What is the PSI of a 747 tire?

Tire Pressure A fully loaded 747-8 weighs nearly a million pounds. All that weight rides on a handful of tires. Automobile tires are pressurized to around 30-40 psi. If large aircraft tires were filled with 35 psi, they would be flat under the weight.

What are airplane tires filled with?

Aircraft tires indeed are filled with nitrogen to mitigate temperature fluctuations, but not because nitrogen has any special heat-absorbing qualities. Rather, it’s the presence of water that makes standard, commercially available compressed air a poor, even dangerous choice for aircraft tires.

Is 45 psi too much air?

Higher pressure generally is not dangerous, as long as you stay well below the “maximum inflation pressure.” That number is listed on each sidewall, and is much higher than your “recommended tire pressure” of 33 psi, Gary. So, in your case, I’d recommend that you put 35 or 36 psi in the tires and just leave it there.

How much air pressure does an aircraft tire lose in a day?

Daily pressure checks are critical because aircraft tire assemblies can lose as much as 5\% of inflation pressure in 24 hours. Aircraft tire pressure must be checked when the tires are cool (at ambient temperature) because heat generated during taxis, takeoffs, and landings can result in elevated pressure readings.

Why is nitrogen used in aircraft tires?

Aircraft Tire Inflation: When inflating aircraft tires, many regulatory agencies require nitrogen gas to be used. It provides a stable and inert atmosphere while also eliminating the presence of moisture within the tire’s cavity, preventing oxidative degradation of the rubber tires.

Why do airplane tires smoke on landing?

Answer: The smoke is the result of a wheel which is not turning in flight making contact with a stationary runway. The wheel must accelerate to the landing speed very quickly. During that acceleration, there is a short time when the tire is skidding, which produces the smoke.

Why plane tires do not explode on landing?

They’re like the tires on your car—but way stronger. The typical airliner tire can handle a 38-ton load. It can meet the ground 500 times before needing a re-tread, a refresh it can take on seven times in its life.

How do airplane tires not pop?

The mechanics take off the hubcap and reduce the tire pressure from 200 to 30 psi, which reduces the risk of it exploding as the bolts and nuts holding it on the plane are removed. A sleeve protects the axle, and a lifting tool pulls the tire off. The axle sleeve is then greased, and the new tire is slid smoothly on.

Is 40 psi OK for tires?

If there’s no sticker, you can usually find the info in the owner’s manual. Normal tire pressure is usually between 32~40 psi(pounds per square inch) when they are cold. So make sure you check your tire pressure after a long stay and usually, you can do it in the early morning.

What does the red dot on an aircraft tire mean?

mean? A: The red dot or triangle indicates the. circumferential location of the light spot on the tire. This mark should be aligned with the valve stem or the tube balance mark when mounting the tire.

How big are the tires on a 747?

4. Airplane tire size chart

Aircraft type	Tire size
Boeing 747-400	H49 x 19.0 – 22
Airbus A320	30 x 8.8 – 15
Boeing 787 – 800	50 x 20 – 22
Embraer 145	19.5 x 6.75 – 8