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61 votes
Accepted

Why aren't flights continued after losing a tire on rotation?

Blown tire - can't raise gear, shredded tire will not fit in the bay. -> Gear down - much lower maximum speed and lots of additional drag -> Both of those mean very poor fuel economy -> Very ...
Harper - Reinstate Monica's user avatar
52 votes

Can I land my aircraft on the grass next to the runway at a public airport?

It depends on the airfield. Landing on grass is only recommended if the ground is maintained to a reasonable standard and clear of obstructions. Some airfields have grass strips maintained for that ...
GdD's user avatar
  • 54k
50 votes
Accepted

Why did the space shuttle use bias-ply tyres instead of radials?

Simply put, for the weight bearing factor bias-ply is a lighter tire, and when building a spaceship weight is the top concern. The reason they were thin and single use also had to do with weight, ...
Dave's user avatar
  • 101k
42 votes
Accepted

How do airplane wheels differ from automobile wheels and why?

Let's start with tire pressure. A car tire has somewhere between 2 and 3.5 bars (that's 29 to 51 psi) while airplane tires go up to 24 bars (350 psi). Next, they must withstand extremely heavy loads ...
42 votes

Why aren't flights continued after losing a tire on rotation?

That kind of thing would be a judgment call on the part of the crew (ultimately the capt) and would come down to what is the safest action based on the circumstances, with logistical/convenience ...
John K's user avatar
  • 132k
36 votes

Can I land my aircraft on the grass next to the runway at a public airport?

Well, you're using land that is under the authority, or delegated authority, of somebody, so technically you need that authority's permission to use other than a designated landing area under the ...
John K's user avatar
  • 132k
12 votes
Accepted

Why are the wheels of aircraft relatively small?

As usual in the aerospace world, it is a compromise among contrasting requirements. Wheels must be big to pack enough disks for the (disk) brakes. But they must be as small as possible too, in order ...
sophit's user avatar
  • 12.8k
10 votes

Why aren't flights continued after losing a tire on rotation?

Because an emergency landing is preferred to gambling the airplane and the lives of everyone on board just to save a few bucks. One of the fundamental rules of professional flying: Never attempt ...
Romeo_4808N's user avatar
  • 73.8k
10 votes
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How often is a tire replaced on a 777?

Aircraft tires are replaced on condition, but maingear tires usually last about 250 cycles. A 777 in longhaul usage might only get two cycles a day, so a set of tires would last about four months. ...
Pilothead's user avatar
  • 20.2k
7 votes
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Wheel or skid? Which advantages does each one have when used as the landing gear system compared to the other one?

It really depends on how you intend on landing the vehicle, how you intend on using the vehicle, and generally any design limitations that may come into play. For fixed wing aircraft that need to ...
Dave's user avatar
  • 101k
7 votes

Why don’t aircraft use run-flat tyres?

The same reasons that run-flat tires aren't more common on cars or trucks are amplified with aircraft. They're more expensive and can wear out faster. They will also be much heavier. This has to be ...
fooot's user avatar
  • 73.4k
6 votes
Accepted

What causes airliner tyres to burst as often as they do?

Car tires aren't really comparable. Car tires: make a lot of miles, but in mostly benign circumstances. Low speeds mean little heating (and slow changes in temperature). failures are often caused ...
Hobbes's user avatar
  • 10.2k
6 votes
Accepted

What is the wear limit for tires?

Yes, there is, but it is not by regulation. It is in Advisory Circular 20-97B. For example, section 7 would apply to most of your pictures: (7) In-Service Inspections (Operator). (a) Tread ...
Ron Beyer's user avatar
  • 36.2k
6 votes
Accepted

What is the air temperature inside of a tire right after landing?

I'm not sure that there is a maximum design temperature and even if there was it wouldn't be that high, probably no more than 120C. The problem is not the temperature inside the tyre but actually ...
Adrian's user avatar
  • 697
5 votes

For large commercial aircraft, how are the tires changed?

In general, the jack is put under the axle of the wheel to be changed. Thus the oleo still carries the weight of the airplane and stays at the same extension, and the jack just has to lift the wheel ...
RAC's user avatar
  • 4,616
5 votes
Accepted

Front and / or Rear Tires Doors or Windows testing in Aircraft

There are no 100% guarantees in life, certainly not in aviation. But in the interest of safety pilots have multiple indications available, and options in case things go wrong. In most planes the ...
fooot's user avatar
  • 73.4k
5 votes
Accepted

What do the numbers and letters mean in landing gear tire sizes?

$ \begin{array}{|c|c|c|c|c|c|} \hline \textsf {(H) M x N} & \textsf{(R)} & \textsf{D} & \textsf{(PR)} \\ \hline \textsf {27 x 8.5} & \textsf {R} & \textsf {12} & \textsf {16} \;...
mins's user avatar
  • 74.3k
4 votes
Accepted

is nitrogen put in airplane tires? and Why?

Transport airplanes use dry (completely dehumidified) nitrogen from high pressure bottles for tire servicing. Shop air is "dehumidified" using water separators but will still have water ...
John K's user avatar
  • 132k
3 votes
Accepted

Are nose wheel tyres designed differently from the main wheel tyres?

Wheels on the 747-400 are the same all round. One operator I worked with had a mixed fleet of -400 and -200s. They used the -200 wheels on the -400 nosewheel (mainwheels had to be -400).
Anilv's user avatar
  • 4,566
3 votes

Were my airplane's wheels under-inflated?

High tire pressure means less rolling resistance at least on a good road. However it also reduces grip that makes braking less efficient (source). Hence high pressure may make sense for a bicycle but ...
h22's user avatar
  • 12.1k
3 votes

What causes airliner tyres to burst as often as they do?

It really isn't that common in the big scheme of things, but there may be a factor that makes them more common than they might otherwise be. A lot of airlines retread their tires because they go ...
John K's user avatar
  • 132k
3 votes

Do I need FAA permission to install tundra tires on a Piper PA-28 Cherokee 140?

Any time you make a modification to a certificated aircraft you need FAA approval. Even what appear to be minor things, like replacing you sun visors with better ones requires an STC. Putting in ...
JScarry's user avatar
  • 7,464
3 votes

What needs to be considered when changing a tire during boarding/deboarding?

I have never seen an airline (or the military) have a maintenance procedure where a tire can be changed with pax on board the aircraft. Normally, if the problem is found when pax are on the aircraft, ...
Juan Jimenez's user avatar
2 votes

What is the rejected takeoff procedure for a blown tire?

With smaller planes, if you blow a tire on takeoff and have enough runway left to abort, then you should do so. Staying on the ground can be a much better option than a go-around and landing with a ...
Aaron Holmes's user avatar
  • 4,847
2 votes
Accepted

Would this modified tire work to prespin an aircraft tire?

The idea is good in concept but it would be pretty difficult to match the rpms to the actuual ground speed, in fact if the wheel was spinning faster it would actually wear the tyre more! Another ...
Anilv's user avatar
  • 4,566
2 votes

What needs to be considered when changing a tire during boarding/deboarding?

I stood on the tarmac at Ben Gurion TLV/LLBG and watched them change a tire on an El Al 747 prior to departure. My dad and I were the last two to board and we were walking our dogs prior to putting ...
FreeMan's user avatar
  • 16.3k
2 votes

When the aircraft tires are "worn to limits", should it be recorded as a pireps or mareps?

A "PIREP" (pilot-report) is an in-flight report of weather or other things that other aircraft should be aware of that ATC may not know. I'm not sure what MAREP you are referring to, the only one I ...
Ron Beyer's user avatar
  • 36.2k
2 votes

is nitrogen put in airplane tires? and Why?

Nitrogen has a lot of benefits when used in tyres, not just in aircraft but in cars, trucks, motorbikes and so on. First consider the alternative. If you fill the tyre with air you will get some water ...
Paul Smith's user avatar
  • 1,095

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