Pneumatic coaxial piston air cannon teaser

Made out of a bicicle pump! The idea is to use the one way valve that every bicicle pump has on its piston, to improve the performance of the gun, instead of using loose pistons as usually. I know the difference may not be crucial but it's for the sake of well-design. The piston is too heavy but seems to prove the theory. At only 75psi it shoots a 0,2g 6mm plastic bb through a steel (yes, steel. This is Europe) coke can. Filled with water it pierces the can and leaves a mark on the other wall. Air leak detected, soon to be fixed. UPDATE 20150719 Air leak was fixed with teflon tape. Cannon was intended to be tested to 10bar / 145psi. At 8bar / 116psi the back bursted off the main body, propelling it against a wall, with the cannon hitting at a great speed. Result is a bent cannon. Speed doesn't seem to have decreased but precision has been seriously affected. Plans for now are to test the energy at 75psi (like this teaser shows), then cut the cannon to the unbent part (which is about half the lenght), glue the back permanently and test energy again at 75psi to see the relationship between cannon lenglt and muzzle energy. Afterwards, with the back end fully glued, repeat tests at 116psi / 8bar and hopefully get the same energy as full-lenght-cannon @ 75psi. If not, test pressure until total burst, or the desired energy achieved. Advise is greatly appreciated. Thanks for watching! A FewFriendsFace production Likeyright FFF2015 All likes reserved

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Transito di saturno ripreso con Nikon 7500 montata su telescopio SC 9,25. Il video è stato prodotto il 20 settembre 2019, l'interferenza del cielo era media.

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A quick highlight from our recent trip to Riga, Latvia 🇱🇻, where Katia went behind the scenes at Latitude Yachts to see the LANIAKEA 88’ power catamaran taking shape. This is one of those milestones that never gets old — the moment the hull comes out of the mould and the project suddenly feels real. In the full film, Katia meets the team, walks you through key elements of the build, and shares some of the construction techniques that make a huge difference to strength, finish, and long-term quality. We also take a moment to show a bit of Riga itself (including the Christmas market) because the city is a big part of the story — this is where LANIAKEA is being built, and you really get a feel for the environment and the people behind the project. 🎥 Full behind-the-scenes episode is now live on our @yachtbuilders YouTube channel. If you enjoy shipyards, build processes, and seeing what goes into a project before launch, it’s well worth watching.

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We’re starting the GRP repair after our recent boat fire 🔥. This is a quick look at the polythene containment tent we set up inside the boat to control dust and fumes during fiberglass work. Watch this space as we rebuild and restore our liveaboard yacht one layer at a time! Don’t miss upcoming videos on the repair process, surveyor reports, and how we’re getting back on the water. ----------------------------------------------------------------------------------------------------- If you found it informative or entertaining please give it a thumbs as it helps get YouTube to promote it outside of the existing subscribers. If you haven't already and you want to follow along with our journey, hit the subscribe button. We do now liveaboard our sailboat and are inspired by those channels to do similar. So please join us along our journey. Production Music courtesy of Epidemic Sounds. https://www.epidemicsound.com/referral/tj3lov/ Click on the link above to get access to great copyright free music. We receive a small commission for all referrals. We've also added some links next to the equipment we use if you want to check them out on Amazon. If you are in the market for any new kit we'd appreciate it if you could click through one of our links, it puts a few coppers in our account :) even if you purchase something totally different. Thanks ------------------------------------------------------------------------------------------------------ ***** LINKS ***** Don't forget to drop by our website, found out a bit more about us, read the latest blog or even subscribe to our newsletter. http://www.carlandjenny.com // Video Stories, Pictures and more about us and what we get up to on our blog. ------------------------------------------------------------------------------------------------------ ***** HELP US KEEP THE VIDEOS COMING ***** Want the chance to come aboard or get unseen footage privileges? Please become a Patron and support our video productions. http://www.patreon.com/carlandjenny // Get fun rewards for supporting Carl and Jenny’s videos and becoming a patron -- Rather just buy us a beer? You can do that via PayPal You can also buy us a beer at paypal.me/CarlandJenny ------------------------------------------------------------------------------------------------------ ***** CONNECT WITH US ***** Don’t forget to Like us on Facebook https://www.facebook.com/carlandjenny // Like for daily pictures and stories from us both See our latest pictures on Instagram https://www.instagram.com/CarlandJennysailing // Follow for great pictures from Carl and Jenny Get our latest updates on Twitter https://www.twitter.com/carlandjenny // Follow to get our real-time updates ------------------------------------------------------------------------------------------------------ ***** CAMERAS ***** Interested in what gear we use? Here's a list of some it and links to Amazon where you can get your own. Panasonic Lumix GH5 https://amzn.to/2OlMdo5 Panasonic 35-100 2.8 lens https://amzn.to/2DbfdbF Rode Videomic pro https://amzn.to/2XMqEQE Rode smart lav mic https://amzn.to/2OGHe02 Canon G7x mkii https://amzn.to/2pKwqp4 Panasonic Lumix waterproof compact DMC-FT3 https://amzn.to/2DdzGMT GoPro Hero 3 black GoPro Hero 6 black https://amzn.to/34jsIC1 Rode Micro https://amzn.to/2Oh3YEM iPhone 6+ . https://amzn.to/2pSLD7K Drone - DJI Mavic Pro Fly more https://amzn.to/2KTP0T5 DJI Osmo pocket https://amzn.to/37EnYsz DJI Osmo pocket accessories https://amzn.to/2XLQLXM Zoom H1 Sound recorder . https://amzn.to/2OOkmvM Zoom H4 Sound Recorder https://amzn.to/2s8ABMf ------------------------------------------------------------------------------------------------------ ***** EDITING SOFTWARE ***** MacBook Pro https://amzn.to/2KTblA9 Final Cut Pro x with Marantz external mic https://amzn.to/2QOoIpd Lacie external Rugged Hard Drive https://amzn.to/2shNBzp ------------------------------------------------------------------------------------------------------ ******Navigation******* Navionics https://amzn.to/2KQBTSP Garmin inReach https://amzn.to/2QSk09R ------------------------------------------------------------------------------------------------------ Get Tubebuddy for great stats for your YouTube Channel http://bit.ly/2eHmFPK