Home : Gallery : History : Uses : Behaviour : Maths : Forum : Propulsion : Links : Glossary
Main Forum Page

The Gyroscope Forum

17 December 2018 03:30

Welcome to the gyroscope forum. If you have a question about gyroscopes in general, want to know how they work, or what they can be used for then you can leave your question here for others to answer. You may also be able to help others by answering some of the questions on the site.

Search the forum:  
 

Question

Asked by: david cwalina
Subject: torpedo gyro creep
Question: In an old paper on WWII torpedo gyros I found a formula for the lateral placement error due to gyro creep as 3.63-5 R sin(lat) * t where R is run distance (v*t, single speed). This is 1/2 of a standard derivation based on particle drift due to the coriolis effect (1/2 at^2 where a = -2 omega v sin(lat) and omega is earth rotatation ~7.3e-5 rad/sec. The reason given is "The angular creep of a gyro wheel at any latitude is given by this formula: t/4 * sin(lat) ; t in mins. Therefore, the mean course of the torpedo will be: t/8 * sin(lat) (degrees)". I'm guessing that the guidance control of the gyro results in a reduction in the drift by 1/2 but cannot find reference to the angular creep of a gyro wheel equation and its corollary for course. Any thoughts?
Date: 30 September 2014
report abuse


Answers (Ordered by Date)


 
  • No answers yet
  • Add an Answer >>
    Website. Copyright © 2018 Glenn Turner. All rights reserved. site info
    Do not copy without prior permission. Click here for gyroscope products