# All Questions

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### LAN data from computer

I have an HMI (Siemens MP 377) to print collected data on a LAN connected printer. Now I would like that the data that are being sent to the printer is also received at a computer through Ethernet LAN....
13 views

### Should I use ST or LT values for extruded rod?

In MMPDS for AA7075-73511 (extruded rod) the Table 3.7.10.0(g3) show both ST and LT values for transverse directions. For a rod with circular cross section there is really no Short and Long transverse ...
44 views
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### USB solenoid valve driver (<1A) with hit and hold

Hi I'm looking for a USB controllable (or less ideally a serial interface of some other kind) solenoid controller that can switch up to 8 small (<1A) solenoid valves with hit and hold*. The best I ...
24 views

### How does humidity, specifically using a humidifier, affect the filtration of PM2.5 particles from a room?

I live in a very smokey and dry area where people are advised to use air purifiers. Since it's also dry I'm curious what affects, if any, adding a humidifier to a room with an air purifier would have? ...
29 views

25 views

### how to make closed square structure stable

i want to make this structure stable so i can use flexibility method to calculate deflection of Point B this structure is 4 times indeterminate so i need to delete 4 variables from it ( example ...
102 views

### What is inside this heater flow switch?

Here is the mystery. In the following youtube video you can see the pin of the flow switch diaphragm extended when the faucet is flowing (the valve is after the flow or pressure switch). https://www....
44 views

### Can an empty aviation fuel tank blow up

At the end of the James Bond movie View to a kill, the aeroplane runs out of fuel - both the propellers stop and the plane glides. There are holes at the bottom of the tank so all the fuel has ...
87 views

### Beam for shop gantry

I have a small machine shop and need to size a beam for a gantry crane. The design is a 4 post fixed design with 2 horizontal beams running parallel across the shop ends with 1 beam to be mounted ...
22 views

### is there a hard castable ceramic i could use to make an engine cyllinder?

Im thinking of building a model piston engine. Since i don't have machining equipment i will need to cast it out of something. Melting metal requires some equipment (i tried melting aluminium in a ...
40 views

### Is there any way to conserve energy for the following scenario of lifting weight?

A pulley can be used to provide mechanical advantage while lifting weight. Suppose a combination pulley is made such that in order to lift something four times heavier, one can use the same force but ...
37 views

### Is it true that pre-jet air planes used to fly much lower? If so, why?

I watched a video on the Concorde the other day. In it, they talked about the history of airplanes, and how the jetplanes now started flying "above the weather", and that the propellar-...