Sorry about the confusions.
CFM would be thru the fan and perforated wall means a wall with holes.
I could see many desktop fans mount their fans directly on the wall. But by my simulation, it shows if i put some distance between the fan and the wall, the CFM thru the fans is increased. So I...
I have a question about the relationship between fan CFM vs the distance it is installed away from a perforated wall.
I did a simulation and it shows that keeping a distance between the two will make the fans have more CFM, less static pressure than the fans directly installed on the plate.
If...
I don't get it.
Imagine there is a stick leaning aganist a wall.
There is a moment couple somewhere on the stick.
The end of the stick hits the wall and the wall acts against it.
The sum of moment is 0 but since the moment couple forces cancel each other, the resultant force is the wall...
um... does it mean that if I jump on a weigh balance indirectly with a mat, I will have a smaller reading on the balance than jumping directly on top of it?
Maybe i should put it this way... if a pendulum hit a compression spring attached to the balance, since it absorb all the energy, the...
I see. Please confirm me.
Can I say the above two cases have the same work done energy but due to the time duration differences, one has a lower intensity soundwave travel?
Does the soft pad case has slower propagating soundwaves with lower amplitude which adds up to become the same force as...
The thing I don't understand is:
if you hit a soft pad with your fist, the other side of the soft pad which is a weigh balance will have the same force measurement as you hit directly on the weigh balance.
But hitting soft pad will result in a lower sound. So the dissipation of energy cannot be...
First of all, can the floor mat be assumed to be a spring?
The spring takes in loading gradually instead of taking an impact force.
But how does elongating the time duration of a force reduce the noise?
Does it have something to do with the frequency of the vibration?
In the case of impact...
Hi Richard,
It would be electric drive. I just wonder if anything can be used to make sure they share load equally. They are supposed to push in the same direction.
thanks
I have a structure that needs to be pushed by a set of actuators. It is because 1 actuator's loading may not be sufficient and changing it to a more powerful model will just sacrifice my space which is not favorable.
Can anyone tell me if it is a common way of doing it? If so, how do I manage...
I am looking for a material that I can bend easily into different desired shape frequently without breaking or losing strength. The material can either be elastic or not elastic. I know sheet spring can do but if I bend it like 70 to 80 degrees will it permanently deformed or become fatique...
Is it possible that I keep the typical working torque but increase the rpm by raising my voltage to my motor?
I have this motor and control board:
http://uk.rs-online.com/web/p/stepper-motors/3514631/
http://uk.rs-online.com/web/p/stepper-drives-indexers/2407920/?origin=PSF_421243|acc...
Hi guys,
I have 2 mini motors and a set of worm gear.
I would like to know how to build a system that can make use of the torque from both motors at the same time so that I can double the torque without losing speed.
thank you
why we add reflected voltage to the input voltage but subtract current from the input current?
Also why the reflected current is shown on the other side of the load, traveling back to the input source but not on the same path where it travels from?
Does voltage wave reflect the same way...
Can anyone explain in simple terms on how they are equal? graphs are welcome.
The thing I don't understand is why exp(jwt) is sinusoidal. Wouldn't exp(jwt) go to infinity when t increases? I don't know how to understand the exp term as sinusoidal? in my mind they simply go to zero or infinity.