Doubling (the area where two connecting masts run in parallel)

[Jeffrey Modell]

I have been looking for any kind of formula or resource that provides numerical advice as to how far the overlap between two masts (e.g., lower mast, topmast) of a given length, diameter, and perhaps wood type, should be. This area of overlap is called the doubling. My time period is 1750 to 1825 (I assume today this would be a detailed engineering computation, but not back then). Anyone have any recommended sources? TYVM.

 

[Bryian]

I just measure off the plans.

 

[Uwek]

I have been looking for any kind of formula or resource that provides numerical advice as to how far the overlap between two masts (e.g., lower mast, topmast) of a given length, diameter, and perhaps wood type, should be. This area of overlap is called the doubling. My time period is 1750 to 1825 (I assume today this would be a detailed engineering computation, but not back then). Anyone have any recommended sources? TYVM.

I do not have the book by hand now, but I could imagine, that there is some information given in James Lees book

Book review - The Masting and Rigging of English Ships of War, 1625-1860" by James Lees

An other cornerstone in each private library describing the mast, spars and the complex rigging work should be The Masting and Rigging of English Ships of War, 1625-1860 By James Lees Publisher: Naval Institute Press; 2nd Rev edition (October 1984) Pages: 212 ISBN-10: 0870219480...

shipsofscale.com

another possibility (for french ships, but maybe also british) could be the 3.rd volume of the 74-gun ship from Jean Boudriot

Book review - Book Review: "THE 74-GUN SHIP - Volume 3 - MASTS - SAILS - RIGGING" (Set of 4 Volumes) - by Jean Boudriot

Book Review: THE 74-Gun SHIP / THE SEVENTY-FOUR GUN SHIP A Practical Treatise on the Art of Naval Architecture 4 Volume Set (Set of 4 volumes) Overview of the Content of all 4 Volumes Here: Volume 3 - MASTS - SAILS - RIGGING by Jean Boudriot english translation by David H. Roberts...

shipsofscale.com

and maybe also the Underhill

Plank on frame models, harold a underhill.

Today received 2 volumes of the book plank on frame models from harold a underhill. The books are dealing with the full building of planks on frame models with an example of an 19th century bark. Lots of tips and tricks in this 1960s book. As I read it I will post a more detailed review. The...

shipsofscale.com

As I know, the doubling (length between the cap and the hounds is often also called "top" or "head", and it is the difference of hounded length of the mast and measured length of the mast counted from the mast foot - so there are some difinitions and rules (I think)



Maybe this contemporary book can also help (it is from 1843)

A Treatise on Masting Ships and Mast Making

books.google.at

 

[threebs]

I find the more dificult part of doubling is the shape of the upper masts butt. I have seen both octagonal and hexagonal bases. It seems, in American ships anyway, that butt shape changes every few years or so?

 

[Uwek]

I have been looking for any kind of formula or resource that provides numerical advice as to how far the overlap between two masts (e.g., lower mast, topmast) of a given length, diameter, and perhaps wood type, should be. This area of overlap is called the doubling. My time period is 1750 to 1825 (I assume today this would be a detailed engineering computation, but not back then). Anyone have any recommended sources? TYVM.

I have send you a PM - hope these information are helping

 

[Jeffrey Modell]

Thanks all!

 

[Uwek]

I have been looking for any kind of formula or resource that provides numerical advice as to how far the overlap between two masts (e.g., lower mast, topmast) of a given length, diameter, and perhaps wood type, should be. This area of overlap is called the doubling. My time period is 1750 to 1825 (I assume today this would be a detailed engineering computation, but not back then). Anyone have any recommended sources? TYVM.

Hallo @Jeffrey Modell
we wish you all the BEST and a HAPPY BIRTHDAY