Recent content by TugboatEng

Do you have any requirements for how long this needs to run at power? You should start there. If this is an emergency generator it may be required to meet an equivalent to US EPA Tier 3. These engines often have significantly higher BSFC numbers than any other rating.

The wait for the report crowd are a bunch of wet blankets. This kind of speculation is healthy provided we remain open minded about our assumptions. It's the Branch Covidians that don't want us discussing things outside of the official channels.

If they do create a negative condition, it can be quite difficult to get private companies to clean up the messes they have made. Canada is having to deal with an abandoned tidal turbine. https://www.cbc.ca/news/canada/nova-scotia/tidal-power-green-energy-bay-of-fundy-trevor-boudreau-1.7509897

I don't think a boom strike would cause the mounting deck for the transmission to separate from the air frame.

I do want to correct my comment about the compressor. The centrifugal stage appears to be intact. The axial stages are substantially damaged. I have seen some references to Falk Grid type couplings being used on helicopters. They aren't exactly meant to shear under high loads but do shear...

I thought you this was fake news but apparently there is a company injecting sulfur dioxide into the upper atmosphere in order to cause global cooling. https://makesunsets.com/pages/contact I still didn't believe this could be true but sources more reputable than I have confirmed it...

The damage is largely concentrated in the compressor housing. It looks like the centrifugal compressor disk burst. Can these over speed if the load is abruptly removed? Maybe a gearbox failure led to a catastrophic overspeed.

There is a picture of the rotor still attached to the transmission with the mounting hardware on it still. It looks like it tore off a chunk of the airframe. There is also a picture of the engine. In this design, the exhaust outlet is on the center and the combustor/turbine and compressor are...

The media has jumped on the "Jesus nut" bandwagon despite the the gearbox still being attached to the rotor assembly.

And the heat treat of the wire. Use annealed wire if you want less spring back.

Running pairs of cable in parallel allows for smaller cables. There is no off the shelf cable that is rated for 1000 amps.

Got 20 minutes? Here is a video on mast bumping. Some helicopter can strike the tail boom with the rotor under some conditions. Robinson is notorious for this.

There is an elephant in this room. It's not wise to put pneumatic controls in sealed encloses. The IP rating probably shouldn't be applied here.

Hmm?

Is anybody else disappointed in the deteriorating satellite image quality of Google Maps?