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

0

0

0

249

0

0

0

0

171

UPDATE 9/11/18 - just in from Boris Best from the upwind bouncing bam bam bam. All good here so far.Liebe grüße Tech talk: I had broken a lashing between the mast and the block for the mast rotation purchase. I left the mast rotation loose as upwind it aligns itself usually pretty nicely. This morning around 4 the boat was suddenly starting to act weirdly. I checked the wind angle display but i was upwind, although the boat was jumping over the waves and reaching at 2 knots. Heeled over a lot. I felt quickly that it was wrong with the wind instruments. I switched on the B system and find out that was broken. No surprise that the wind vane on the top of the mast was damaged after all the slamming. My heart beat rises imagining sailing the rest of the race with no instruments like in the TJV. It means a big penalty in performance. To figure out what was going on i swapped over some elements and could find that on my main system only the mast angle sensor had broken, possibly as a consequence of leaving the mast rotation open. I repaired the lashing, adjusted the mast to this upwind angle and gave the instruments a manuel input for mast angle instead of the sensor. That way my A system is now fully up and giving nice wind data again. A small issue but in the darkness and upwind - slamming is quite annoying. So happy now that i still have one functional wind vane at the top of the mast and can sail with autopilot following the wind angle… that helps a lot! To see more of Boris and his adventures check out the website at: www.borisherrmannracing.com or follow us on instagram or facebook at borisherrmannracing. We are still looking for more sponsors so if you are interested you can get in touch with us via the website.

0

0

0

183

Mise à l'eau et inauguration du 4X "Ritual" de Jean-Pierre Balmès! Il participera à la Route du Rhum - Destination Guadeloupe 2018 qui reliera Saint-Malo à Point-à-Pitre en novembre prochain. Une course qui se fera en soutien à l' Association Rire, clowns pour enfants hospitalisés.

0

0

0

3,084

Un week-end per aspiranti comandanti. Nei nostri fine settimana di corso prenderai confidenza con la navigazione per acquisire l'autonomia per poter gestire un'imbarcazione da solo. Questo corso vela è dedicato a chi ha già qualche esperienza e vuole migliorarsi. Imbarco e sbarco a Caorle, navigazione in Croazia.

0

0

0

64