Pump Up Inner Tube without Pump?

[Yellow Saddle]

Pimp my ride?

No! Can't you read. Pimp my Puncture.

 

[johnnyb47]

I don't understand the point to this question. If you get a puncture just simply change the tube and pump the tyre up with a small pump that can be carried in your saddle bag. Once home repair your punctured tube. I've barely got enough oxygen to supply my ageing body whilst out on a bike ride. I certainly wouldn't have enough to blow a tube up lol. If I was caught short out on a ride with a puncture and no pump find a field with some straw and pack the tyre out as tightly as you can with it lol. At least it will enable you to ride it home " abait slowly" and will avoid having ruptured lungs.

 

[winjim]

I see, yes the experiment itself is possible but the outcome is unknown, I'm wondering if the little understood matter of friction would come into play, if you think about it, inflating a tyre with a hand pump can generate an incredible amount of heat, does the OP run the risk of 'Spontaneous Combustion'?

That's not friction, that's gas compressing according to the ideal gas law pV=nRT

 

[Velominati]

That's not friction, that's gas compressing according to the ideal gas law pV=nRT

Or....Charles' Law: The Temperature-Volume Law. This law states that the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature. As the volume goes up, the temperature also goes up, and vice-versa. Either way it could still result in burnt lips, there's a joke in there somewhere but I think I'll give it a miss.

 

[winjim]

Or....Charles' Law: The Temperature-Volume Law. This law states that the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature. As the volume goes up, the temperature also goes up, and vice-versa. Either way it could still result in burnt lips, there's a joke in there somewhere but I think I'll give it a miss.

You're assuming constant pressure. In a bike pump both pressure and volume change. You need to combine Charles' and Boyle's laws to account for that.

ETA: and Avogadro's obviously, seeing as how your amount of gas is, essentially, constant as it compresses.

 

[Velominati]

You're assuming constant pressure. In a bike pump both pressure and volume change. You need to combine Charles' and Boyle's laws to account for that.

ETA: and Avogadro's obviously, seeing as how your amount of gas is, essentially, constant as it compresses.

or as I like to say,

 

[Velominati]

or as I like to say, View attachment 143292

The OP, Callum, I hope your keeping up with all of this.

 

[tyred]

If you have a Woods valve you can unscrew the valve core very easily and it is quite easy to blow a tube up to take shape but definitely not enough to ride on.

A young version of me tried this many years ago and ended up feeling light headed and sick and with a taste of rubber in my mouth.

Don't try this at home kids. It's safer to play on your playstation.