Sir I just wanna tell you thank you for your videos they have help me through my captain’s course more than you can ever imagine thank you again and have a great day
Thanks for explaining these nozzles. I was admiring what the heck was in the back of a run boat in a boatyard with a four bladed prop, driven buy a huge prop shaft.
The nozzle plane at the end is awesome. And Bernulli. Professor J.Sumner Miller said there were 50 or maybe 100 people in the Bernulli family and all were geniuses. I don't know but great video. Thanks I freaking learned something today. Finally...
That was brilliant, concise - clear and extremely educational. You do a great lecture always whether the topic is Wind or Knots. Hope your business propers!! (From North of Ireland)
We had Cort nozzles on the USNS Narragansett, the problem we had with them was cracking. In the 14 months I was on her, we had to go into drydock twice to repair cracks in them.
@6.47 you got the "lift" forces wrong; they should be in the direction of thrust, so forward. An intuitive explanation: the propeller is "sucking" fluid from the front creating a low pressure zone (the fluid is accelerated - bernoulli law) the low pressure is acting on the nozzle intake and creating the "lift" force
correct me if I'm wrong but I don't think the kort nozzle itself can generate thrust, the physics doesn't add up that you can stick something with a drag coefficient in a fluid stream get a net increase in velocity
The kort nozzle is generating thrust, the propeller is creating low pressure in the front, that low pressure is acting on the nozzle intake and generating thrust. In some cases the thrust generated by the nozzle can be as large as the thrust from the propeller itself.
Hi how are you ? I have a fishing boat 18m long and i put it in drydock to make some works on it . Do you think if i put a kort nozzle i will get more benefits ? I mean more speed , less diesel consumption does it affect in engine etc. . All i want to know is advantages and disadvantages of the kort nozzle .
Hello, I have an oral WKM exam next week and I am super stressed about it, Do you know if there are any videos that can help me with preparing for that exam?
![[All About] Boat Propellers and Prop Walk | Sailing Wisdom](http://i.ytimg.com/vi/E1dt19C_vxE/mqdefault.jpg)
Sir I just wanna tell you thank you for your videos they have help me through my captain’s course more than you can ever imagine thank you again and have a great day
Thanks for explaining these nozzles. I was admiring what the heck was in the back of a run boat in a boatyard with a four bladed prop, driven buy a huge prop shaft.
Works just like the NACA "speed ring" cowl to reduce drag and increase cooling flow and thrust.
Thanks for your explanation
@@naelabdullah2078 glad to help!
The nozzle plane at the end is awesome. And Bernulli. Professor J.Sumner Miller said there were 50 or maybe 100 people in the Bernulli family and all were geniuses. I don't know but great video. Thanks I freaking learned something today. Finally...
Nice explanation
That was brilliant, concise - clear and extremely educational. You do a great lecture always whether the topic is Wind or Knots. Hope your business propers!! (From North of Ireland)
Thank you!
We had Cort nozzles on the USNS Narragansett, the problem we had with them was cracking. In the 14 months I was on her, we had to go into drydock twice to repair cracks in them.
Interesting. I hear ice gets jammed in them sometimes too.
@6.47 you got the "lift" forces wrong; they should be in the direction of thrust, so forward. An intuitive explanation: the propeller is "sucking" fluid from the front creating a low pressure zone (the fluid is accelerated - bernoulli law) the low pressure is acting on the nozzle intake and creating the "lift" force
Well explained sir.
Thanks from India
thank you so much 🙏
Is there some Venturi effect in addition when the fluid is forced thru the tapered cone?
correct me if I'm wrong but I don't think the kort nozzle itself can generate thrust, the physics doesn't add up that you can stick something with a drag coefficient in a fluid stream get a net increase in velocity
The kort nozzle is generating thrust, the propeller is creating low pressure in the front, that low pressure is acting on the nozzle intake and generating thrust. In some cases the thrust generated by the nozzle can be as large as the thrust from the propeller itself.
In a kart nozzle propulsion system, the length of the kart nozzle is generally _???___
its diameter
Hi how are you ? I have a fishing boat 18m long and i put it in drydock to make some works on it . Do you think if i put a kort nozzle i will get more benefits ? I mean more speed , less diesel consumption does it affect in engine etc. . All i want to know is advantages and disadvantages of the kort nozzle .
If you go slow and pull things then it might be good. If you go over 10 knots often then it will be inefficient.
@@uscaptainstraining does it strain the engine ? And can i have low consumption ?
Hello, I have an oral WKM exam next week and I am super stressed about it, Do you know if there are any videos that can help me with preparing for that exam?
Where were you all these years Dear Captain, don't live us here please.
Wonderfull ⚡️⚡️⚡️
Excellent explanation... good video
Thanks!