Tubeless Tire | The interesting Physics behind it
Summary
TLDRThis video script explains the difference between tubed and tubeless tires using a balloon analogy. Tubed tires, with an inner tube, deflate quickly when punctured. Tubeless tires, however, are designed to seal punctures slowly, preventing sudden deflation. The script describes how tubeless tires use a self-sealing mechanism, similar to a balloon wrapped in sticky tape, to maintain air pressure after a puncture. It also covers the technical aspects of converting a tubed tire to tubeless and the importance of rim design for a proper seal.
Takeaways
- 🚗 The blue car with tubeless tires survives a puncture while the red car with tubed tires ends in a fatal accident.
- 🌐 Tubeless tires are based on a simple balloon principle where a punctured balloon with sticky tape around it leaks air slowly.
- 🔍 Tubed tires contain an impermeable rubber tube inside to prevent air leakage through the porous rubber.
- 📌 If a nail punctures the tube of a tubed tire, air leaks out rapidly, which can lead to a blowout and loss of control.
- 🔧 The valve in tubed tires is not fixed to the rim to allow for the sudden escape of air in case of a puncture.
- 🛠 To prevent the tire from slipping off the rim during sharp turns, metallic beads are used in the tire design.
- 💡 The tubeless tire design uses a sticky tape-like mechanism to prevent sudden deflation when punctured.
- 🔄 The inside region of the tube in a tubeless tire is removed, and the tire is glued to the rim for structural support.
- 🔒 A special rim with a hump is required for tubeless tires to ensure an airtight seal.
- 🔄 Tubeless tires can be made to fit on an asymmetrical rim design by applying force and using compressed air.
- 🔄 Tubeless tires often contain a latex-based sealant that can self-repair small punctures, but it needs to be replaced every few months.
Q & A
What is the main difference between tubed and tubeless tires?
-Tubed tires have an inner tube that holds the air, while tubeless tires do not; they are designed to be airtight and self-supporting.
Why do tubed tires need an inner tube?
-The rubber of the tire is permeable, so an impermeable rubber tube is placed inside to prevent air leakage.
What happens when a nail punctures a tubed tire?
-Air will suddenly leak out of the punctured tube, potentially causing rapid deflation and loss of control of the vehicle.
How does the valve attachment affect the deflation process in a tubed tire?
-If the valve is not attached to the rim, the air will quickly escape through the valve hole, leading to a rapid deflation.
What is the role of the metallic beads in a tire?
-The metallic beads help ensure that the tire remains seated inside the rim, even during sharp turns, to prevent the tire from coming off and causing accidents.
How does the sticky tape balloon experiment relate to tubeless tire technology?
-The sticky tape prevents the balloon from bursting when punctured, similar to how tubeless tires are designed to prevent sudden deflation and allow for a slow, controlled air leak.
What is the purpose of gluing pieces of normal tire around the tube in a tubeless tire?
-This provides structural support against sudden deflation, allowing the tire to maintain its shape and prevent rapid air loss.
Why is the rim design important in a tubeless tire?
-The rim must have a locking mechanism, such as a hump, to ensure an airtight seal with the tire and prevent air from escaping.
How do engineers make it easier to fit a tire onto a rim with a hump?
-By making the rim asymmetrical, the tire can be fitted by applying force in a particular way, allowing the bead to stretch slightly and seat properly.
What is the self-repairing mechanism in tubeless tires?
-A latex-based sealant is used that can seal small punctures automatically, but it needs to be refilled every three to four months to maintain its effectiveness.
Is it possible to convert a tubed tire to a tubeless tire? If so, what is required?
-Yes, it is possible, but the rim must have a hump to provide an airtight locking mechanism, which is essential for the conversion.
Outlines
🚗 The Difference Between Tubed and Tubeless Tires
This paragraph explains the difference between tubed and tubeless tires and their respective safety implications. Tubed tires have an inner tube that holds air, which can lead to sudden deflation and accidents if punctured. The paragraph uses the analogy of a balloon to illustrate how a puncture can cause a rapid loss of air, leading to a tire blowout. On the other hand, tubeless tires are designed to prevent such incidents by allowing air to leak slowly, preventing sudden tire flats and enhancing vehicle control. The concept of tubeless tires is based on the principle that a punctured balloon wrapped in sticky tape can prevent rapid air loss, similar to how tubeless tires are designed to contain punctures and maintain air pressure.
🔧 The Innovation of Tubeless Tires
The second paragraph delves into the practical design and benefits of tubeless tires. It describes how tubeless tires are constructed with a self-sealing mechanism that slows down air leakage in the event of a puncture, similar to the sticky tape around a balloon. The paragraph also explains how tubeless tires are fitted with specially designed rims that have a locking mechanism to ensure air-tightness. The rim's asymmetrical shape allows for easier tire fitting, and the bead of the tire is designed to stretch slightly to fit perfectly. Additionally, the paragraph mentions the self-repairing feature of tubeless tires, which involves a latex-based sealant that can plug small holes automatically. The video concludes by addressing the question of whether tubed tires can be converted to tubeless, confirming that it is possible provided the rim has the necessary hump for airtight locking.
Mindmap
Keywords
💡Puncture
💡Tubed Tires
💡Tubeless Tires
💡Rubber Permeability
💡Deflation
💡Valve
💡Metallic Beads
💡Self-Repairing Mechanism
💡Rim
💡Asymmetrical Rim
💡Latex Sealant
Highlights
The blue car with tubeless tires survives a puncture while the red car with tubed tires ends in a fatal accident.
Tubeless tire technology is based on a simple balloon experiment with sticky tape.
Tubed tires require an impermeable rubber tube inside to prevent air leakage.
If a nail pierces the tube of a tubed tire, air leaks out quickly causing a sudden deflation.
The valve in tubed tires is not fixed to the rim to allow for sudden air escape.
Sudden deflation can cause the tire to burst and the car to become uncontrollable.
Metallic beads in the tire ensure it stays inside the rim during sharp turns.
Tubeless tires use a sticky tape-like mechanism to prevent sudden deflation.
Puncturing a balloon with sticky tape allows for slow air leakage instead of an explosion.
The tubeless tire design uses pieces of normal tire glued around the tube for structural support.
The rim of a tubeless tire has a hole for the valve and a locking mechanism to prevent air escape.
A hump on the rim ensures an airtight lock with the tire.
The rim is asymmetrical to allow the tire bead to fit with less flexibility.
Tubeless tires have a self-repairing mechanism using a latex-based sealant.
The latex sealant needs to be refilled every three to four months to maintain its effectiveness.
It is possible to convert a tubed tire to a tubeless tire if the rim has the necessary hump.
The video concludes with a thank you note to viewers for watching.
Transcripts
in the event of a puncture for both
these cars the blue car survives and
pulls over while the red car ends up in
a fatal accident
to understand why this is the case look
no further than the tires
the car that crashed has tubed tires and
the one that survived has tubeless ones
you might be amazed to know that a
simple balloon case forms the basis of
tubeless tire technology
this balloon based when i prick it
but
when the balloon has a sticky tape
around it
it just goes for a very slow leakage
without any issue
let's get in the design details of the
tubeless test based on the simple
experiment
before understanding tubeless tires we
must first look at the basics of tubed
tires
in order to inflate the tire we never
fill the air inside the tire directly
the rubber of the tire is permeable this
is because it is chemically processed to
achieve good strength
therefore if we fill it with air
directly the air will leak out through
the materials small pores
the solution is to keep an impermeable
rubber tube
inside the tire if you fill this tube
with air there won't be any leakage
this is a good design however if a nail
pierces the tube
air will suddenly leak out of it
let's pause here
now we have two design options
we can either leave the valve not
attached to the rim
or we can fix the valve with the rim
which option is best
majority of the air particles which are
leaking out from the tube puncture are
trapped between the tube and the tire
if we leave the valve loose obviously
the valve will fall within the rim all
the air will quickly rush out through
the valve hole
and the tire flattens out
however with the second option since the
valve is fixed the air will be trapped
between the tire and tube and deflation
could be a slow process
so is the fixed valve design your choice
if so this will lead to a catastrophe
the issue is that if the high pressure
air cannot escape from the tube then the
tire will go for a blast as shown
due to this the valve is not fitted to
the rim in the tube tire design
in the tubed tire case we must allow the
sudden escape of air to save the tire
another important aspect of the tire is
to ensure that the tire always remains
inside the rim even when the vehicle
takes sharp turns
here a pair of metallic beads is
inserted inside the tire
as this tire flattens suddenly its
radius is reduced
and it will now have a lower velocity at
the contact point
this situation will lead to a
differential action
where the car will have an instantaneous
turn as the driver attempts to rotate
the car in the opposite direction by
steering the car becomes uncontrollable
resulting in a devastating accident
now it's time to explore how the
tubeless tire overcomes such fatal
accidents with the help of an
interesting sticky tape balloon
experiment
here i have a balloon with me is
obviously impermeable
but here the main issue is that in case
of a small puncher the balloon just
explodes
here's the main taste
when the balloon has a sticky tape
around it
when i prick it with a needle
it just goes for a very slow leakage and
never best
this interesting combination of sticky
tape balloon forms the foundation of the
tubular stairs
let's get into more details of it
first we must explore why the balloon
popped in the first place
the compressed air inside the inflated
balloon keeps it in tension when you
puncture this balloon with a needle the
compressed air will rush out through
this narrow gap
this escaping air will generate radial
force on the balloon thus expanding the
punctured hole
the air rushes out quickly due to this
the same thing happens with a tube also
and air rushes out quickly
what happens with the sticky tape is
interesting
when you puncture with a needle here
also the puncture wants to expand due to
the radial forces but the sticky tape
won't allow that
thus the opening remains the same and
the air leaks out slowly
now let's extend this fundamental
knowledge to create a tubeless tire
consider this inflated tube
it is impermeable making it equivalent
to the balloon we looked at before
the tube needs good structural support
against sudden deflation
instead of using sticky tape we can
simply glue pieces of normal tire around
the tube
now when you puncture the tire it will
not suddenly deflate
instead the air will leak out slowly and
steadily
hooray we have now achieved a safer tire
so no sudden tire flats
to make this design more practical let's
remove the inside region of the tube and
this tube material stuck to the tire
arrangement is fitted with a rim
this rim has a hole to fit the valve
the valve is inserted from the inside
portion of the rim and it is made so
that when pulled out it locks properly
there you have it a tubeless tire
the new tubeless tire design will only
be leak-proof with some specially
designed rims
first let's try out the old rim and see
what happens
here the pressurized air can easily
escape as shown
to make the tire air proof the tubeless
tire needs a good locking mechanism
this is why engineers added an
additional protrusion called a hump on
the rim
this perfectly locks the tire onto the
rim so that the air doesn't escape at
all
however this presents a new challenge
with the tire bead the tire has less
flexibility
how can we then get it to fit on the rim
engineers have come up with a clever
solution for this problem
they made the rim well asymmetrical in
shape as shown
for this rim design fitting the tire is
easily possible by applying force in a
particular way as shown
please note the bead is just slightly
allowed to stretch and the tire fits
perfectly
[Music]
only the upper right side bead will face
some difficulty in fitting
this region also can be fitted when you
fill the tire with the compressed air
did you know that tubeless tires have a
self-repairing mechanism
this is a latex-based sealant method
watch how this liquid self-repairs this
hole
to ensure that the latex sealant
performs as intended you will have to
refill it with a new one every three to
four months
here's an interesting question
can you convert a tubed tire to a
tubeless tire in practice
yes you can the only condition here is
that your rim must have the hump to
provide airtight locking
we hope you enjoyed the video
thank you for watching
تصفح المزيد من مقاطع الفيديو ذات الصلة
5.0 / 5 (0 votes)