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Research Shows Adding Flap Improves Rotor Performance

Wind-assisted propulsion, including the century-old Flettner rotor, is increasingly drawing interest as the shipping industry looks for solutions to e. ....

Zuid Holland , North Sea , Oceans General , Giovanni Bordogna , Albert Rijkens , Research Shows Adding Flap Improves Rotor Performance , Sea Axe Fund , Delft University Of Technology , Technical University Delft , Blue Wasp , Blue Wasp Marine , Norsepower Rotor Sails , Anemoi Rotor Sails , Politecnico De Milano , Damen Combi Freighter , Delft University , Blue Wasp ,

CNN CNN Newsroom June 4, 2024 18:49:00

These three were right on the border of it. so there was a legitimate concern there. chinese spy balloon, we knew exactly what that thing was. and we knew what it was trying to do, and we saw it, jackie, as it slowed down and sped up, maneuvered a little bit. trying to get a look at what we believe to be sensitive military sites. these other three, they didn t have propulsion, they weren t being maneuvered. basically being driven by the wind. we don t think we don t know for sure whether they had a surveillance aspect to them, but we can t rule it out. there was a little bit, enough uncertainty there that again, out of an abiddance of caution, doing the bprudent thing, the president directed they be taken down. is this the standard going forward? we re going to dive into this. we re going to learn from these three events. we re going to continue to study what happened. we re going to have an interagency effort, and we ll ....

Spy Balloon , They Weren T Being Maneuvered , Maneuvered A Little Bit , Surveillance Aspect , In The City ,

MSNBC Chris Jansing Reports June 4, 2024 18:49:00

Slowed down, sped up, maneuvered a little bit trying to get a look at what we believe to be sensitive military sites. these other three, they didn t have propulsion and weren t being maneuvered. basically they were being driven by the wind. we don t think we don t know for sure whether they had a surveillance aspect to them, but we can t rule it out. so there was enough uncertainty there that, again, out of an abundance of caution, doing the prudent thing, the president directed they be taken down. we re going to dive into this. we re going to learn from these three events. we re going to continue to study what happened. we ll have an interagency effort to help us get around the policy implications here and see where this goes. the bottom line for president biden is, we ve got to do the right thing for the american people for our safety and security. i can t say whether that s ....

Weren T Being Maneuvered , Surveillance Aspect , Policy Implications , Bottom Line ,

CNN CNN Newsroom June 4, 2024 18:26:00

Different because we knew precisely where that was. as we have said, we do not assess these most recent objects posed any direct threat to people on the ground and we are laser focused on confirming their nature and purpose, including through intensive efforts to collect debris in remote locations where they have fallen. in each instance, we have followed the same basic course. we assessed whether they posed any kinetic threat to people on the ground. they did not. we assessed whether they were sending any communication signals. we detected none. we looked to see whether they were maneuvering or had any propulsion capabilities. we saw no signs of that. we made sure to determine whether or not they were manned. they were not. we did, however, assess that their altitudes were considerably lower than the chinese high altitude balloon and posed a threat to commercial air traffic. while we have no reason to ....

Communication Signals , Air Traffic ,

CNN CNN Newsroom June 4, 2024 20:03:00

More about these objects from u.s. officials. what are they saying? reporter: u.s. officials are giving us an early read on what these objects are believed to have looked like with u.s. officials saying the object that was down over alaska is believed to be a metallic object that broke into several pieces when it was downed onto the sea ice. the waters have frozen around alaska. they re also telling us that both of the objects down over canada and over alaska are believed to have had pay loads. we don t know what s in those pay loads as phil was saying. the other thing is that all three of the objects are not believed to have propulsion, meaning they were going in the wind stream, didn t have control over the direction that wind stream was taking them or how quickly they were traveling. they re all believed to have different appearances. still a lot of questions here, bri ....

U S , Sea Ice , Didn T , Wind Stream , Bri Brianna ,