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Duration: 01:13 minutes Upload Time: 2007-02-14 18:50:41 |
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My best jam jar pulse jet engine so far, running at night so you can see the flame, with the added bonus of a spectacular finale. Find out how to make it at http://www.instructables.com/id/EJ6JA1OD4CEXCFO3PQ/ |
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| identiticrisis 2008-03-27 08:55:31 Submerging the jar fully in water will increase the speed at which heat is removed from the jar's outer surface (esp. if stirred) and hence reduce the outer temp. The 'jet' will take longer to warm up, in other words, and probably last a bit longer before shattering the jar. It's also safer. The jar will float, though, but only part-wetting the jar will cause a sudden temp. diff. along the jar's length ==> potentially faster failure. Weigh it down. :D __________________________________________________ | |
| boots247 2008-02-10 18:18:37 Thanks, I am building one myself, see my vids, My jar had a 15mm hole (but it was a large jar), it ran but struggled to keep going. __________________________________________________ | |
| TheLangfords 2008-02-10 18:03:35 About 10-12mm. Check the link in the video description for more details. If you want more detailed help, register with the site (for free) and send me (Kiteman) a PM - I check Instructables every day because I'm on the Feature team. __________________________________________________ | |
| boots247 2008-02-10 15:46:55 Cool vid, what size hole did you use??? __________________________________________________ | |
| zooyork232 2008-01-20 02:38:25 nope,it mainly produces heat __________________________________________________ | |
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