Title Posted
The pre-war importance of Basilisk Station Apr 2009
Elizabeth's new royal yacht, HMS <em>Duke of Cromarty</em> Apr 2009
Freighting LACs to the Talbott Quadrant Apr 2009
More on the sources of Manticoran wealth Apr 2009
With Apollo, do you really need armor any more? Apr 2009
The spillover effect from Manticore's Junction-created astrographic position Apr 2009
Shot weight vs shot size Apr 2009
Apollo fire control for light units Apr 2009
Overwhelming the RMN with light units Apr 2009
Why the Queen's Own exists Apr 2009


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Pearls of Weber

A collection of posts by David Weber containing background information for his stories, collected and generously made available Joe Buckley.

Impeller rooms

  • Series: Honorverse
  • Date: October 22, 2002

Impeller rooms are cylindrical volumes located within the hull and centered fore-and-aft on the impeller ring they serve. The diameters of civilian impeller rooms are approximately 60% of the diameter of the impeller ring and approximately 1.2 times as long as they are across. They normally consist of a single, very large compartment crammed with the required generators and node support hardware. Military impeller rooms are approximately 85% as wide as the diameter of the impeller ring and approximately 1.6 times as long as they are broad. They are also subdivided — normally into quarters in smaller vessels (through CL), eighths (CA-BC), or twelfths (DN-SD) — with the individual compartments heavily bulkheaded and armored to localize and contain damage. Since the outbreak of the war, the RMN and GSN have begun dividing impeller rooms in ships of the wall into 16ths — one for each beta node. These individual compartments are arranged in clusters around the long axis of the ship with each forming a smaller cylinder, bundled together with their fellows within the volume of the overall "impeller room." Thus a modern RMN SD would refer to "Impeller One" or "Impeller Two" to indicate (respectively) the forward or aft impeller rooms, and then to "Impeller Eleven," "Impeller Twelve," or "Impeller Thirteen" to indicate the subcompartments within Impeller One. (That is, "Impeller 1.1" would be referred to as "Impeller Eleven," "Impeller 1.2" would be referred to as "Impeller Twelve," etc.)