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Showing results for tags 'blueprint errors'.
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When the dimensions of a ship are given, they are stated as moulded dimensions. For example, the New York Pilot Boat "Phantom" is listed on Model Shipways plans as shown here: Length overall (moulded) 76'-4" (Assuming that this is measured from the face of the stem to the stern end of the deck.) Beam moulded 19'-8" (Assuming this is the maximum width) Draught 10'-8" max. (Assuming this is measured from the waterline to the bottom of the keel.) Here are some photos of the ship plans to help illustrate my confusion with several discrepancies that I have come across. I have put notes on the plans where I have come across some errors, but the first and most glaring error (shown above) is that the overall length on all of all the deck and side elevation views measures about 1’-8” short of the previously stated dimension. One might say that the error is in the reproduction of the print, but if you measure the beam dimension off of the same drawing of the deck plan, it is very close to the stated dimension. Stretching out the length of that drawing would now make the beam dimension incorrect! There is also a scale drawn below the waterline plan. When I put my 1/8” architectural scale on this printed scale, (shown below) you can plainly see that they don't come close to matching either! If I put the same architectural scale on the waterline, profile elevation, or deck plan I have the same situation, and yet when measuring the beam section drawing below, the scale matches exactly! Now that I have decided to build this ship @ 3/16” scale, I obviously need to have the plan enlarged some more. However, all of the plans seem to be drawn at different scales. If I enlarge one, the others also get enlarged the same amount. So the error would continue, but just at a larger size. Having made the decision to use a somewhat modified bread and butter method of construction, the accuracy of the profile section drawing becomes quite important, and when my scale is used to measure this drawing you can see that it is right on the money. Oh but wait a just a minute here. That would mean that the ship is really wider than what the other drawings show! This leaves me a little confused as to which drawings are drawn correctly and which ones are not. Oh, and by the way, this also brings up yet another question. If the ship length is short.............. does this missing 1’-8” need to be added to the bow, the stern, or somewhere in between?
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