Manually pumping air into an underground shaft - GIF

[Altair]

Manually pumping air into an underground shaft.




Previously:

Hospital pneumatic tube system - photo
Coal miner poma lift - GIF
How an old miner's lamp works - GIF
Spedding mill illumination device - photo
Coal mine canary reviving chamber - photo

[trigger]

I would rather build a bellows think it would be more efficient?

[nova_robotics]

I would rather build a bellows think it would be more efficient?

Most definitely, but if your ventilation system looks like that the people in that hole are probably more disposable than that plastic bag. A bellows is not in the budget.