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How industrious and intelligent they were at the turn of the century with what they had to work with!

I wonder what the fuel efficiencies are on these semi-diesels' vs a true diesel? I'm guessing that's why they faded from use.

The key would be to provide a fast set up with a good fast indexing fixture that only takes a minute for the operator to set up. It must connect the workpiece electrically to the table. Find out the t-slot dims and make it fast to install the fixture and quick to index each burn location for...

Small hole EDM uses hollow brass or copper tube as electrode and uses deionized water pumped thru the rotating electrode/tube at high pressure, 2000psi in order to preserve the electrode from rapid heat disintegration and flush out the swarf. Most shops commonly keep electrodes down to .25mm and...

If one could make a 2-piece tip with a lapped, tapered center core, shallow machining or ground grooves could be cut on the core's face then the core inserted into the tapered seat?

Do you have a good, flat surface plate you put a sheet of abrasive on and flatten the surface?

We do pity them in the US! During good times they take tremendous profits and when the economy tanks badly, they get the taxpayers money thru government bailouts by begging the government to help because they are "too big to fail", same for all big corporate groups, they need financial aid...

Just lowering of the inflation rate leaves the elevated prices and shrink-flation remain intact while the consumer's wages did not escalate at the same rate... still a big loss for the consumer, especially for the young family of 4 that is struggling more now on a day-day basis. Those invested...

On you tube, Tom Stanton has just put up a video with some air turbine blade testing that might be of interest.

Best wishes Brian and have a peaceful recovery!

I believe with my current car, a 2013 VW GTI, it is not the mechanical parts that will likely fail if maintained, but the electronics and related connectors and many of the plastic components that will become troublesome from heat cycling, made worse by the added under hood heat from the...

I used to work as a designer for a company that was the largest producer of extruded vinyl refrigerator gaskets in the world, serving every major appliance manufacturer. It became common practice to add granite dust to the pure vinyl compound to cheapen the cost and reduce the longevity to where...

1) If fuel injection begins 15 degrees before TDC and cylinder pressure is now able to provide the required heat to begin ignition of the smallest fuel particulates distributed about the composition space. So, we are reaching peak mechanical compression ratio and going beyond it as injected fuel...

I'm a bit confused, are modeled diesels timing the injection to well before tdc and compressing the mixture to ignition point or reaching full compression and then injecting into the highest combustion space temperature?

In the 80's, I bought a well-used VW diesel pickup. While driving it down the interstate on my way back home, the engine began running at high rpm without any touching the pedal. I shut the key off to close the fuel solenoid but it had no effect. A run-away diesel. I held the brake with it in...

We might also consider that dynamic forces will act upon actual compression ratio, drawing it down just prior to the instant ignition is required. The compressed air's molecular volume being reduced from the cooling effects of metals enclosing the combustion space and the cooler fuel being...

That would be a tiny injection orifice, but how would it ever close? Maybe he just relied on whatever supplied fuel pressure to control fuel flow? I wonder how much difference there is in power and efficiency between a true compression ignition diesel model engine when running on an alternative...

May I ask, as the injectors ports in modern, full-size diesels are small enough to atomize very well, then would a small, model true diesel engine require even smaller orifices and perhaps higher injection pressures to atomize to a proportionately smaller fuel particulate size? Can the fuel be...

Let me ask, does the small, model diesel engine's diminished mass cause a common inability to create and maintain enough heat within the combustion space to begin the compression ignition process, requiring all true diesel compression ignition model engines to use alternative fuels? Would using...

That boat engine sounds like an old john deere! I appreciate the GM 71 series of two cycle diesels. Perhaps like you, I have followed them on youtube and followed the difficulties encountered when trying to build small scale models of true functioning diesels on this site and think about ways...