Do aircraft tyres expand at high altitude and how are other rubber things like flexible hoses protected.?

Question

I understand that hoses are reinforced but are tyres only inflated to about 5lbs psi to take expansion into consideration.
As a P.S. to another question congrats to the HX558 team on completion to get this aircraft flying again.

Answer 1

Assuming the aircraft flew all the way into space; the difference would only be 14.7 PSI. Some large jets have tires inflated to over 200PSI. Hyrdaulic lines are pressurized to 3000PSI (5000 PSI on the new A380).

The difference is present but negligible.

Yeah, that HX558 is cool!

Answer 2

Yes they do expand, but the pressure differential between sea level and outer space is 14.7 pounds per square inch (psi).

if you was to remove 14.7psi on the outside of the tire, the stresses would be the same if you added 14.7 psi on the inside of the tire.

Most tires can take over inflation of 15psi with no problem.

For aircraft tires there is a larger pressure increase due to heating on landing, (notice big black skid marks on runways). As a gas is heated the pressure increases.

For nitrogen, the theory is that nitrogen is approximately 6 time larger than oxygen, therefore is less likely to leak out or through a tire. Therefore a tire filled will nitrogen will hold the same pressure longer than air. But since air is already approximately 80 percent nitrogen, is the cost justified?

Answer 3

Small airplane have air cooled engines because of the fact they're lighter and much less complicated then water cooled engines. there is besides the shown fact that a diesel engine that's accessible that does have water cooling. uncertain why that's water cooled different then its makes for greater useful engine temperature administration. the main engine cooling required is at low altitudes and severe capability placing while placing out and hiking to altitude so the chilly of severe altitudes isn't available for cooling.

Answer 4

Aircraft tires do expand at altitude, but not much. High performance tires are inflated over a hundred pounds. Hoses are always metal whenever possible so it is not an issue.

Answer 5

Somewhat. But they're filled with nitrogen so it is negligible. It also prevents ice crystals from forming in the tire. Or tyre for you red coats.

Answer 6

The tyres and tubes are designed to contain any internal pressure. So I guess they expand a little.

Answer 7

Aircraft tires are pressurized with nitrogen, which neither expands or contracts with changes in temperature or altitude.

Answer 8

Yes, they do take expansion into consideration... however, the fact that the air is EXTREMELY cold up there also helps with thermal contraction to counteract the expansion due to pressure differential... Cold gases are less dense than warm gases...

Answer 9

Lots of ukas testing to approved industry and European standards in test houses which simulate conditions.

Answer 10

Just a little note on the P.S. it should be XH558.