General Discussions  
This is the place to discuss general issues related to the U-boat war or the war at sea in WWII. 
Go to: Forum List•Message List•New Topic•Search•Log In•Print View
Re: periscope
Posted by: jspargo1 ()
Date: September 27, 2008 02:56AM

I believe I read that they acted to increase the rigidity of the periscope and so minimized oscillation which results from movement of something with a circular cross section through the water. As I understand it the circular cross section results in alternating vortices being generated on either side of the extended periscope resulting in the oscillation. This would be worst at maximum extension. Any attack using an extended periscope would have been performed at very low speed. The waked generated by a periscope would have quickly called attention to the presence of the U-boat.

Options: Reply•Quote


Subject Written By Posted
periscope Simon 09/15/2008 09:04AM
Re: periscope Philipp0408 09/15/2008 09:38AM
Re: periscope jspargo1 09/27/2008 02:56AM
Re: periscope Walter Schmidt 10/01/2008 10:28AM
Re: periscope Gert 10/02/2008 10:41PM


Go to: Forum List•Message List•Search•Log In
Your Name: 
Your Email: 
Subject: 
Spam prevention:
Please, enter the code that you see below in the input field. This is for blocking bots that try to post this form automatically.
 ********         **   *******   **    **  ********  
 **     **        **  **     **  ***   **  **     ** 
 **     **        **         **  ****  **  **     ** 
 **     **        **   *******   ** ** **  **     ** 
 **     **  **    **         **  **  ****  **     ** 
 **     **  **    **  **     **  **   ***  **     ** 
 ********    ******    *******   **    **  ********