Sariel Posted July 20, 2015 Posted July 20, 2015 (edited) So, I've been working on water pumps for a while and this is something like my testbed: Now, I know that using a non-LEGO element such as the syringe may be controversial. In my defense, I did that only after testing a number of pure-LEGO solutions, such as a peristaltic pump, where LEGO tubes proved too thick-walled to work. I was also testing a traditional pressure pump, with water being pushed out of a reservoir by pressurized air, but it did not provide the exit pressure I wanted. So in the end, I have used a regular 5ml medical syringe as a watertight container that can be easily operated by LEGO mechanism. Note that thanks to combining syringe with an automatically operated pneumatic valve, the resulting pump can empty and refill itself in a continuous cycle. It's effective and very easy to control remotely. Pics & some reading: http://sariel.pl/2015/07/fire-boat/ Edited July 20, 2015 by Sariel Quote
TheNextLegoDesinger Posted July 20, 2015 Posted July 20, 2015 Perfect just perfect i also like how you used the outriggers Quote
Epic Technic Posted July 20, 2015 Posted July 20, 2015 Very cool, could you maybe replace the syringe with the new pneumatic cylinder? What about a small water container (approx size of the air tank) and pump air in? Wouldn't thar work? Did you even read his post? Quote
MaxSupercars Posted July 20, 2015 Posted July 20, 2015 Really nice Pawel... and starts water mania... :D Max... Quote
Sariel Posted July 20, 2015 Author Posted July 20, 2015 (edited) What about a small water container (approx size of the air tank) and pump air in? Wouldn't thar work? I tried something like that, the exit pressure was below my expectations. As mentioned in the first post. could you maybe replace the syringe with the new pneumatic cylinder? The cylinder has metal parts. and starts water mania... :D Better: water wars! --> Mad Max ;) Edited July 20, 2015 by Sariel Quote
Epic Technic Posted July 20, 2015 Posted July 20, 2015 The cylinder has metal parts. I have put my pneumatics in water and I haven't gotten any rust if that's what your worried about. Or we could get Effe to design us a stainless steel rod for the pneumatic cylinder Quote
Sariel Posted July 20, 2015 Author Posted July 20, 2015 I have put my pneumatics in water and I haven't gotten any rust Yet. Quote
Epic Technic Posted July 20, 2015 Posted July 20, 2015 Yet. Maybe if the rod was coated in something that would protect it? Quote
Godtshep Posted July 20, 2015 Posted July 20, 2015 Very nice model. I especially like the front. Quote
BachAddict Posted July 21, 2015 Posted July 21, 2015 Maybe if the rod was coated in something that would protect it? And the seals would wipe the coating off! Quote
Rockbrick Posted July 21, 2015 Posted July 21, 2015 I have put my pneumatics in water and I haven't gotten any rust if that's what your worried about. Or we could get Effe to design us a stainless steel rod for the pneumatic cylinder Mine got rust and they have never been in water! where we live has very high humidity... Quote
braker23 Posted July 21, 2015 Posted July 21, 2015 (edited) Such an amazing project, you always impress me, Sariel. The way you use that syringe is pure genius, makes your boat the first one that kids could use to actually play in the bath-tub ;) Edited July 21, 2015 by braker23 Quote
Blakbird Posted July 21, 2015 Posted July 21, 2015 Such an amazing project, you always impress me, Sariel. The way you use that syringe is pure genius, makes your boat the first one that kids could use to actually play in the bath-tub ;) Personally, I wouldn't put myself in a small tub with motorized propellers. Quote
MaxSupercars Posted July 21, 2015 Posted July 21, 2015 (edited) Personally, I wouldn't put myself in a small tub with motorized propellers. Today I bought the Lego City Coastguard Ship because this thread inspired me and motorized it... Propellers are not so dangerous as gears... I touched the 2 gears with my finger and ... auwaaa... like scissors... :O Max... :) Edited July 21, 2015 by MaxSupercars Quote
aeh5040 Posted July 22, 2015 Posted July 22, 2015 That's a fascinating creation, and very playable! Pity it's not pure Lego, but I understand the difficulty. I'm interested and surprised that rotating the propeller cowlings works so effectively for steering... Quote
Sariel Posted July 23, 2015 Author Posted July 23, 2015 Today I bought the Lego City Coastguard Ship ... auwaaa... like scissors... :O Sorry but what else did you expect from a set that comes with 3 sharks in it? ;) Quote
MaxSupercars Posted July 23, 2015 Posted July 23, 2015 (edited) Sorry but what else did you expect from a set that comes with 3 sharks in it? ;) Ha ha... yes the sharks are lovely... :D Hey Pawel... come to make some better propulsion for our ships... maybe it's interesting also for you... :) You got also small performance propulsion on your ship... I know that that was not main function, but it's interesting... I made Idea to use 2 propellers and make steering without rudder, only to steer with changing of rotation of each propeller like on the tank... The advantage is that ship can turn on the small place... See discussion in Elveship topic... Max... Edited July 23, 2015 by MaxSupercars Quote
Sariel Posted July 23, 2015 Author Posted July 23, 2015 Well, I still have these 3D-printed propellers from Efferman that I need to test. Quote
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