LEGO pneumatic compressor using large pumps and PF motors

[Gfok3]

and all you guys thinking that taking the springs off will make it faster are wrong. as one spring is compressing, its opposite one is expanding (regenerative characteristic) it will actually work worse without the springs.

[Gfok3]

interesting, but what is the point when you can pump it up by hand (at least) 5 times as fast with only one pump?

[SM96UK]

maybe gearing it up and removing the spring (make sure u store the springs in a safe place:)) very nive model!!! tho

[crashman434]

Now there is a small compressor in the pneumatic log lifter (8049). You can build a efficient high speed compressor and drive standard lego pneumatics instead of pumping by hand.

[williboooooy]

WAY, way too big for such a damn slow compressor

[aaronlittell]

where did you get the little cylinder

[ozzirt]

Very innovative, and neatly put together.

These "Toys" are too good for children to have :-)

[DrCaboom]

Whats midsensor? or did u mean Midstorm?

[SnoozersDog]

you should make it so when it senses all the pressure is released a moter turns it back on! :3

[abeemanator]

I made a compressor that used 4 of thoes pumps (Without the springs) two motors and a model train controller that output 16 volts, that was inanely powerful

[BubuSnow93]

remove spring :|

[IllegalMavamaarten]

I have only 1 PF motor, and it works fine even without gears :D

[sebtastik]

two pf xl motors don't need a worm screw gear box

[jep0rox]

so is this compressing the air or using compressed air cuz i got plans for a engine and i need a continuas sorce of comressed air plz tell me

[patton446]

for what i can see is this copmressing air but i can go a lotfaster nd higher presue up to 4 bar

[pivotcrazzy]

@jep0rox it makes semi compressed air if he would remove the springs on the pumps then speed it up it could b rly powerful

[sholtob]

you should make a gearbox so its fast at the begining but becomes slow and powerful at the end

[SuperK0rn]

@sholtob im trying to buils a 6 gear gearbox :P

[sholtob]

awsome, i built a 3 gear one but its on nxtprograms not youtube

[legomaniacman]

cutting the springs off the pump help the motor, but then thats just wrong to do that to lego :(

great project looks strong

[RjbsNXT]

its possible to bend the first coil off then then rest comes off easy, and you can put it back on :), no harm done

[legomaniacman]

true, didn't think of that

[topitapi]

Why does EVERYONE asks "why u use it slow" and something like that??!?!??!?! EVERYONE knows the answer! Simplified, its the same as The Slower = The Stronger. So SHUT UP!

[robby844]

slow = no air dipshit. DUH

[Tunerboii2045]

u should forget the regulator and just put all the air in a bottle and compress it all see how much PSI u can get it would be cool

[amj441]

the reason why it is going so slow is because of the spinning spiral on top that turns the other gears, it gives it more power so it can get more pressure into the tank. besides, torque is power not speed.

[urveen]

Power = Torque * Speed ;)

[corotor12345]

nope... torque isn't power. power is torque times angular velocity.

[harleysimon]

es ist besser, wenn man die federn der pumpen entfernt, kann man nachher auch wieder ganz leicht anbringen...

[Tunerboii2045]

why u driving it so slowly??

[grrumpff]

The motor doesnt have enough torque to turn it faster...

[TheFatAssCat]

very nice! if it only came in compact lol. (i tried to make a lego battlebot with a pneumatic flipper- but it requred pumping after the third lift)... It was scrapped

[skl1cent]

that's 1 crazy pump!

[theonlyshep]

Cool Pump,

Listen to the Lego Flexpicker video and you can hear how fast it gets going when you use a RC buggy motor and two pumps with the springs taken off. It rocks much faster.

Good job.

[ivorbigen]

thats wank m8

[jamesbond0096]

very nice. but you should remove the springs of the pumps, then you can make it faster

[mesart]

well, since the two pumps have 180degre to each other, the forces of the two springs cancel each other.

[mesart]

oh james is right. these two forces don't cancel each other exactly. someone who has time and interest can calculate the actual force (as a function of the degree of the big gray wheels)

[googogoogo]

sehr schon

[spiritusmentis]

nice design -- looks like you turned the power functions motor into a servo motor with lots of torque.

By the way, you can easily pump air into 5 cylinders with a single NXT servo motor (check out my compressor). No need for worm gears or reduction...but I guess you already know that since you got the brick :D

[frugoo420]

what if u used a tin can instead of the tank + lego gun + pencil=ammo =deadly >:]

[Srlancelot39]

excellent design.

very compact and strong/stable

[legostuffguy]

if u use xl motors u can have the pumps with springs directly attach to the pump without gear down

[spiekerfreak]

hi man you pump seems to work good but if you have enough of these big pumps, then take the springs off, it helps amazing (i did it miself too, i have 5 big pumps, 3 yelow ones and 2 black ones, hope you use the tip !!!)

[luvitube]

Amazing power, the reduction gear it's a little stressed. I think that the output in air it's not so high to justify the usage of two motors, but it's a cool design! What's the green board near the airtank?

[procraft]

You should be able to "screw" the spring away, just a tip :)

[walikai]

did you use one way valves to keep the pressure as you filled it?

[kronos231]

cool

[topitapi]

Nice desing!