technical question for RC gurus

[Supermario]

Originally Posted by andyathome

that's interesting? I was of the understanding it was like a regulating valve for pressure relief , that's how mine works..
how does your pump sound when there is no stick movement.
the noise should ( as mine dose) stay about the same wheter you are digging or not.

cheers andy

The best way I can describe it is, the relief valve controls how much lifting power the machine has and the 4th valve is the flow control to regulate the speed of the functions. The more oil diverted to the tank the slower the functions. Less oil going to tank means more for the valve.
My pump sound also stays almost constant. I've placed a couple marks on the 4th valve servo coupler. Nice day today and Goose19. (Allen ) is in town to play in the pit so I'll get a good look of what it's doing while he operates.

[andyathome]

http://youtu.be/VR1NbwjUCOU

heres a real quick video of the sound card and see how the revs drop when there is stick movement,
I am going to do the same and watch what the valve actually dose .

cheers for the help , now I am going to go and sit by the letter box and wait for the postman.

cheers andy

[Supermario]

That sounds awesome ! I'm hooked now. I gotta get me one of those

Eagle machinery you say?

[andyathome]

Yeah they have a listing on alliexpress. I think it was $168.00 for everything.
Or email tang at eagle machinery and he will sort you out.
its the same unit in the loader.
she is a tight fit but cut off the tags on the speaker and stick sound card to back of speaker and it will fit. I put some packing foam under the speaker to keep it out of any posible oil spills and used some double sided tape to hold it in place.

cheers andy

[RCP57]

That sounds awesome! I don't know anything about the mixing capabilities of those TX's but I'm thinking with a bit of playing around you could get the revs to be full out with no stick movement and as soon as a hydraulic function was used have them drop off slightly. This would give it the effect of having the engine bog down when digging hard I think. Or are the sound cards only good for idle and pinned noise? I've never had a sound unit so I don't know what I'm talking about but I know that would sound cool....