Recent content by kjjohn

I was thinking about the design of the Sikorsky X2 and S-69 concepts today, and I thought of an interesting idea. I am by no means an expert, but I guess you could say I know more about this subject than the average person. So anyway, if you know about the S-69 and the new Sikorsky X2...

I understand what a capacitor charging circuit looks like, and know how it works. My question is, with an HV boost converter charger, for charging high voltage caps, there is often an LED that lights when charging is complete. How does this work - how does the charger know when the capacitor is...

That was Don Giandomenico. I have read his entire website in detail. He did produce a turboshaft engine in way described above, however, it still used a turbocharger. I believe the turbine was not even stainless steel, and he balanced it by simply drilling holes in the hub until it no longer...

That was another problem I neglected to mention. Although there is a possibility of this, would it be safe to use? I have been reading up on ceramic turbine parts research, and I know that ceramics are being developed that are design to eliminate this problem, however, they probably won't be...

I have been researching DIY gas turbines lately, and I have concluded that I want to make one. :smile: My only issue is that all amateur designs I have seen use turbochargers. I would like to see an axial, multi-stage compressor/turbine design. Obviously this would require one to fabricate the...