Recent content by bob_wbstr

Thank you for that comment Jim. As young apprentices in the 50's we were able to get a ram effect on an engine in a test bed. However it only worked if the pipe was straight and the length of the pipe had an exact ratio to its diameter. What you have described is more like the "gefferator" that...

Thanks Baluncore. I also found it hard to believe that it was so difficult to cap - hence my interest. As I say, the only way to find out what went on is to do the experiment using the various different possibilities that may have existed in the original set up.

Thank you for your response Baluncore. As far as I remember the pipe was about 8 feet ,long and 6 ins dia and was completely open at both ends. I tried to put a cap on top of the pipe but it was almost impossible due to the force of the air leaving the pipe. I have checked the Pulsejet...

Thanks again Simon you are jogging my memory about my first example. I can recall (sixty years later) that it was explained to us the effect was to do with the build up of the standing waves that you mention. If the pipe had a certain length, dependent upon certain other factors, you could take...

Thanks Simon, the test bed was stationary but I would like to add something to my previous post. Many years later I was working on a construction project in the Kalahari Desert when I saw something unusual. In the works yard. There was a piece of galvanised pipe about 6 ins dia and 6 to 8 feet...

I am now 76 years old but as a young man I served an apprenticeship with a well known motor manufacturer and we apprentices were able to carry out experiments on engines in testbeds that were connected to dynamometers. In one such experiment we attached a straight length of pipe to the air...

I would like to introduce myself. I am 76 years old and have an interest in physics but no knowledge or training so am basically just here for the ride. Hope you will put up with me. Thanks. Bob