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MAST LENGTH QUESTION?

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HHIG

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Hey, my question is regarding the length of a mast from a kit.

For example the one to one plans show the mast as say 180 mm, Do you use that length? Or do you need additional length to account for the part of the mast that goes below the deck into the mast hole. Or has the maker of the kit already accounted for the additional length needed on the plans?

Same for the bow sprit.

I am getting close to working on the masts of the Beagle and want to be sure before I start cutting.

Anywho, maybe a dumb question.

I hope all of you elite, pro class modelers can get me in the correct direction.

Thanks, Harry
 
Hello Harry
What ship, nation, year does your model represent?
A cannot imagine the mast material in the kit would require additional length so assume (yes, not always smart to do that) the 180mm would be from the step on the keel to the top of the mast. If you can give the name of your ship and year it was launched it is not difficult to calculate the proper length and diameter of all the lower and upper masts as well as the yards.
Allan
 
This is a question that arises frequently when modeling because masts are stepped in a drilled hole on a solid hull model, stepped as the model is designed in a plank-on-bulkhead hull, or stepped as the prototype was stepped on a plank on frame "as built" hull, and so on.

If you have a scaled sail plan, it should be easy enough to measure from the sail plan and scale to the model's scale to determine length needed for the stepped mast as necessary for the type of hull your model has.

Remember that you will need to be very exact in stepping your mast to make sure it has the proper rake and is true to the centerline because all else essential to the appearance of the masts and, consequently, the entire rigging tophamper, is dependent upon the accuracy of the lower masts' stepping angles. (In the case of a solid hull model, drilling the holes for the lower mast placement will require a drill press or other jig arrangement to ensure accuracy.) It is sometimes prudent to make the opening in the partners a bit oversized to permit shimming to adjust the rake and alignment of the masts as necessary. This is done in full-size construction practice because the fine adjustment of the mast angles is often accomplished when setting up the shrouds and stays. In model construction, however, setting the lower masts firmly to begin with makes rigging the model a lot easier, though. Given the overall height of the masts from keel to truck, a small error in the setting of the foot will throw the truck off by a "magnified" distance at the truck, so positioning the lower masts with perfect accuracy between the step and the partners at deck level is critical.
 
Thanks Allan & Bob,
I am working on OCCRE's HMS Beagle ship kit, scale 1:60. So far I Think I'll just stick with the plan dimensions and see what happens. The OCCRE's videos shows to just use the plans with no extra length required.

Harry
 
Bob Cleek said:
This is a question that arises frequently when modeling because masts are stepped in a drilled hole on a solid hull model, stepped as the model is designed in a plank-on-bulkhead hull, or stepped as the prototype was stepped on a plank on frame "as built" hull, and so on.
Click to expand...
The below is of very little consequence overall, but I am curious. Is the length of the mast from the top of the mast to point A or point B or elsewhere on the drawing below?
Thanks
Allan

Mast step measuring point.PNG
 
HHIG said:
Hey, my question is regarding the length of a mast from a kit.

For example the one to one plans show the mast as say 180 mm, Do you use that length? Or do you need additional length to account for the part of the mast that goes below the deck into the mast hole. Or has the maker of the kit already accounted for the additional length needed on the plans?

Same for the bow sprit.

I am getting close to working on the masts of the Beagle and want to be sure before I start cutting.

Anywho, maybe a dumb question.

I hope all of you elite, pro class modelers can get me in the correct direction.

Thanks, Harry
Click to expand...
THE 1:1 MESSURE IS WHAT YOU SHOULD USE. USE THE 1:1 GUIDE, AND MEASURE FROM THS- I.E FROM THE DECK.

002-.jpg

814--PALO MACHO.jpg

001.jpg
 
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