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The reason many companies at least the smaller ones refuse to ship outside the U.S is due to the taxes and fees levied against American products that must be paid by the shipper and the additional time to keep the necessary records just to get it through customs. Nothing to do with xenophobia.

Yes it is old, but most manufactures do extensive coupon tests in various media to develop their charts. Its normally not expensive to do but it does require good labs to conduct them. These charts are never perfect but they are a very good guide. Not sure how the NSF ratings are developed...

I read the Wiki Page and found it to be very misleading. All heat engines are compared against the carnot cycle. As the primary tenant in thermodynamics is work and heat are equivalent , enthalpy is derived from these concepts. Boundary conditions are important. You can calculate an engine...

The technique used is computational fluid dynamics. The trick is putting the paramaters of the equations together , A 3d compliation on a computer costs a minimum of 70 dollars / hour not including the time to do the coding and check the results. Most of this work is proprietary and its...

I like to think of it this way. First you really do not want moisture in the steam or air. But if it is a mixture there will be a mass difference and the liquid particles will likely move to the outside like the old dairy cream separators. But I do not see the steam condensing because that...

The graph does not represent what will happen. For instance to calculate the pressure with the base hypothesis of four active cylinders you would have each area times the force total force of the pistons to yield one pressure output. This should be a constant. The pressure will dip when one...

The classification of this being a reaction turbine does not fit the definitions of classical turbine design because of how the pressure drop across reaction blades is defined. It appears that the maximum disk velocity should be no greater then the fluid velocity leaving the nozzles. As the...

One of the reasons a Tesla turbine is hard to make work is due to its physics result in high rotational speeds. This results in very high root stresses at the axle area. For most materials these loads are destructive. This is one of the technical difficulties in making tesla turbines.

In his build titled Build a true model A frame engine in three parts he lays out how each system is designed. I did not see any secrets. He shows how the system are configured and gives the basics of the design parameters if one listens. What he does not do is give drawings but the concepts...

The reason fuels are atomized is because in order to get enough fuel into the cylinder the small droplets allow an increase mas flow with the air mixture. Vapor alone will not allow enough fuel to be atomized. Once under increased pressure and temperature combustion will occur. Above about a...

Usually the flow from the high pressure cylinder is dropped into a second cylinder an the steam is expanded at lower pressure. It does not flow back to a heat source like a reheat turbine. You would have to know the pressures to even out the force. What is important is the mean effective...

its a pilot drill for 5/16 -18 thread tap

Your safety valve should not be opening unless you are above of your design setpoint. You should be able to adjust it within a range. It may be operating correctly and you need a pressure gage to monitor what is happening. It may need more control of the grate and combustion air. The reason...

I make a suggestion here before you look at different fuels. If you have access to a oxygen meter and a temperature gage its possible to make a good guess at its performance. Better yet if you can get your hands on one of the newer combustion analyzers. So if you need more air it may mean...

Well I googled spherical separator and they were all quite large operating as dead space removal with entrained filters to capture oil and liquid products. None used the vortex principle as that requires the establishment of a low pressure area in the center. However did find similar designs...

I have three chain saws, two gas one electric. They all have their place but the electric has a real advantage when its near a source of power and the cord is less than 100 feet. Its lighter, always starts, much easier to handle, but still takes the same care from the drive sprocket to the...

A sphere is usually a poor shape for particulate separation and would not normally conform to separation physics. Has this geometry been tested for efficiency other then this one off use. Typically you inter with a high velocity and the walls pick up the particles and the exit is a much larger...

Hilsch vortex tube is in common use, especially in cooling instrument cabinets and hazmat suits which need cooling where the cool air is placed usually at the neck or helmet area. But energy use is quite high when considering you need high compressed air at least 100psi.

Well, let me present a counter argument. Motors will get to hot when they experienced a high current draw above their rating. So which protective device sees that condition first? I think that would be a fuse or circuit breaker. But on a side note if a DC motor got hot at lower speeds I would...

I would like to discourage you from operating that way. Because when heat builds up in a motor they tend to hold that heat longer, a lot longer then you realize and its better to nip it in the bud by cutting off the power before it gets hot in the upper range. I have experienced that only...