Diet Coke and Mentos Engine Page 4

Diet Coke and Mentos Engine Page 4

Pour a small amount of Diet Coke into the bottle, maybe one fifth to one quarter of the bottles height.

Diet coke in the bottle

Diet coke in the bottle

The Next step is to put the lid on and make the whole setup airtight. Liberally apply sealant around the bottle screw threads –

Sealant on bottle screw threads

Sealant on bottle screw threads

Put the lid on. Wait ~ ten to fifteen minutes to allow the sealant to cure enough so that it can withstand the pressure created by the coke and mentos reaction. Go and look at some of my other pages while you’re waiting ;).

Release the exterior magnet and allow the mentos and interior magnet to fall into the diet coke. The reaction should start straight away. The carbon dioxide created will increase the pressure inside the engine.

If you hear any air leaks quickly cover the location with silicone sealant and cover the sealant with tape. Within 5-10 minutes the bottle should have built up enough pressure to power the engine. Give the main engine shaft a spin to get it going and she should take it from there :)
Hopefully you’ll end up with something similar to or better than this –

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