And what country can preserve its liberties if their rulers are not warned from time to time that their people preserve the spirit of resistance? Let them take arms. The remedy is to set them right as to facts, pardon and pacify them. What signify a few lives lost in a century or two? The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
I find it interesting that modern high speed aircraft prop blades (and open rotor engine designs) are trending towards a similar blade shape. A wide chord in the middle and swept back tips. https://mentourpilot.com/wp-content/uploads/2021/02/Safran-Open-Rotor-1.jpg
Interesting, generally 4 blades have been optimized for fuel efficiency and the military uses 5 for acceleration and speed, which is why it is easy to pick out warships on passive sonar. With modern computer modeling they can probably design props with more blades and still not have cavitation issues.
Is that the new blade design for them wind farm contraptions?
ReplyDeleteNope. Those will be placed on top of a Tesla to generate free electricity while driving. Brand name: Perpetual Motion
DeleteI find it interesting that modern high speed aircraft prop blades (and open rotor engine designs) are trending towards a similar blade shape. A wide chord in the middle and swept back tips. https://mentourpilot.com/wp-content/uploads/2021/02/Safran-Open-Rotor-1.jpg
ReplyDeleteLike the contrast between the "new" E-2 Hawkeye prop versus the old:
Deletehttps://external-content.duckduckgo.com/iu/?u=http%3A%2F%2Fdata3.primeportal.net%2Fhangar%2Fbill_spidle3%2Fe-2c_165508%2Fimages%2Fe-2c_165508_28_of_30.jpg&f=1&nofb=1
https://external-content.duckduckgo.com/iu/?u=http%3A%2F%2Fdata3.primeportal.net%2Fhangar%2Fbill_spidle3%2Fe-2c_165508%2Fimages%2Fe-2c_165508_28_of_30.jpg&f=1&nofb=1
You should see how massive the machine is to balance the screw. It's dynamic not passive, it means the screw is turning on it.
ReplyDeleteLet's see it!
DeleteInteresting, generally 4 blades have been optimized for fuel efficiency and the military uses 5 for acceleration and speed, which is why it is easy to pick out warships on passive sonar. With modern computer modeling they can probably design props with more blades and still not have cavitation issues.
ReplyDeleteThanks, seriously, for all this information. Anybody know what vessel this will be on? One or several on the same ship?
ReplyDeletethis could be the propeller made in 2006 by the German firm Mecklenberger Metallguss for the container ship Emma Maersk
ReplyDeleteprobably polished with a 3 inch die grinder
ReplyDeleteLooks like a cooling fan for a Harley
ReplyDelete