aircraft tires are designed to carry
heavy loads at high speeds in the
smallest and lightest configurations
practical but this means they’re
subjected to enormous pressures and
friction they’re highly engineered
structures they carry weight similar to
the tires on the largest earth movers
but at the speed of a Formula One car
pound for pound they endure the harshest
service life of any tire made on takeoff
the load on aircraft tires makes them
heat up to temperatures of between 130
and 150 degrees centigrade
Dunlop aircraft tires in Birmingham has
been designing and making aircraft tires
since 1910 they hand make tires for all
types of aircraft from Jumbo’s to
Harrier Jump Jet they carry out rigorous
tests that push aircraft tires to more
than four times their operational safety
limits to ensure they can withstand all
the stresses they might undergo they’re
tested on a dynamometer that simulates
taxiing takeoff and landing conditions
but the most impressive test is when
tires are overinflated in the first sale
so Nate what’s the purpose of this test
this is to check the strength of the
casing this particular tire is off a
Boeing 737 it’s a main oil tire and it’s
rated to 220 psi right Wow so what we
need to do we need to get to 880 psi and
we’ll probably go beyond that we
probably gets around about a thousand
and I’ll see we’re putting air in here
only no no we can’t use air we have to
use water if we used air that the volume
of air that would be generated in here
would cause a tremendous bang will
probably destroy most of the surrounding
buildings the last time an aircraft tire
was overinflated with gas here at Dunlop
was in the 1960s and here’s what’s
happened it’s never been done since
overinflating aircraft tires to more
than four times their normal pressure is
an extremely dangerous business so
Richard and Johnny have to retire to a
safe distance and watch the action on a
monitor it takes nearly 10 minutes to
fill the tire to just its normal
operating pressure of 220 psi
of course the anticipation is killing me
exciting isn’t it yeah to overinflate
the tire the water pressure is stepped
up again and is pumped hydraulically
into the casing I’m not missing this
moment oh I’m glad yeah don’t look away
because you know if you do this is this
a once-in-a-lifetime opportunity see
this the pressure is building
Nick how we doing on pressure where
we’ve reached the minimum that we
required done 880 are where we have yet
I think we’re probably about 900 where
we’re coming up to 900 well Richard may
have missed it but you won’t
we sure will we are we’re at 905 psi 905
doing cuz when I turn around to you Wow
look at that
destroyed yeah that’s a typical burst
that happens on crossroads by reaching
over four times its normal operating
pressure before bursting and even then
still retaining its basic form this type
of aircraft tire has proved that it has
the strength and integrity to cope with
extreme situations very reassuring in
the event of an emergency landing is
there any way we can film on a custard
heavy loads at high speeds in the
smallest and lightest configurations
practical but this means they’re
subjected to enormous pressures and
friction they’re highly engineered
structures they carry weight similar to
the tires on the largest earth movers
but at the speed of a Formula One car
pound for pound they endure the harshest
service life of any tire made on takeoff
the load on aircraft tires makes them
heat up to temperatures of between 130
and 150 degrees centigrade
Dunlop aircraft tires in Birmingham has
been designing and making aircraft tires
since 1910 they hand make tires for all
types of aircraft from Jumbo’s to
Harrier Jump Jet they carry out rigorous
tests that push aircraft tires to more
than four times their operational safety
limits to ensure they can withstand all
the stresses they might undergo they’re
tested on a dynamometer that simulates
taxiing takeoff and landing conditions
but the most impressive test is when
tires are overinflated in the first sale
so Nate what’s the purpose of this test
this is to check the strength of the
casing this particular tire is off a
Boeing 737 it’s a main oil tire and it’s
rated to 220 psi right Wow so what we
need to do we need to get to 880 psi and
we’ll probably go beyond that we
probably gets around about a thousand
and I’ll see we’re putting air in here
only no no we can’t use air we have to
use water if we used air that the volume
of air that would be generated in here
would cause a tremendous bang will
probably destroy most of the surrounding
buildings the last time an aircraft tire
was overinflated with gas here at Dunlop
was in the 1960s and here’s what’s
happened it’s never been done since
overinflating aircraft tires to more
than four times their normal pressure is
an extremely dangerous business so
Richard and Johnny have to retire to a
safe distance and watch the action on a
monitor it takes nearly 10 minutes to
fill the tire to just its normal
operating pressure of 220 psi
of course the anticipation is killing me
exciting isn’t it yeah to overinflate
the tire the water pressure is stepped
up again and is pumped hydraulically
into the casing I’m not missing this
moment oh I’m glad yeah don’t look away
because you know if you do this is this
a once-in-a-lifetime opportunity see
this the pressure is building
Nick how we doing on pressure where
we’ve reached the minimum that we
required done 880 are where we have yet
I think we’re probably about 900 where
we’re coming up to 900 well Richard may
have missed it but you won’t
we sure will we are we’re at 905 psi 905
doing cuz when I turn around to you Wow
look at that
destroyed yeah that’s a typical burst
that happens on crossroads by reaching
over four times its normal operating
pressure before bursting and even then
still retaining its basic form this type
of aircraft tire has proved that it has
the strength and integrity to cope with
extreme situations very reassuring in
the event of an emergency landing is
there any way we can film on a custard
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