Nirvana Posted October 27, 2013 #1 Posted October 27, 2013 Hmm, I was cleaning my work table and placing items in their proper areas. I have four metallic rulers, both showing the metric and imperial units. By pure curiosity I placed the shortest one, 15.24cm - 6" next to my 30.48cm - 12" and my two 45.72cm -18" and found differences. None measured as the other. The difference is so slight, but could probably cause error when mixed. Now I marked the 15.24cm and 45.72cm that are almost identical. The other two to be donated to friends 3rd grader school kids. A high quality digital caliper needs to be purchased. trippwj and sonicmcdude 2 Please, visit our Facebook page! Respectfully Per aka Dr. Per@Therapy for Shipaholics Finished: T37, BB Marie Jeanne - located on a shelf in Sweden, 18th Century Longboat, Winchelsea Capstan Current: America by Constructo, Solö Ruff, USS Syren by MS, Bluenose by MS Viking funeral: Harley almost a Harvey Nautical Research Guild Member - 'Taint a hobby if you gotta hurry
realworkingsailor Posted October 27, 2013 #2 Posted October 27, 2013 As long as you continue to use the same ruler every time, the error should be constant... rather than random.... Still.... something for everyone to be aware of. Andy WackoWolf 1 Quando Omni Flunkus, Moritati Current Build: USF Confederacy
JeffT Posted October 28, 2013 #3 Posted October 28, 2013 Good catch. You'll definitely want to use the same one consistently. WackoWolf 1 Jeff In progress: Medway Longboat 1742 - Syren Ship Model Company -1/2" scale USS Constitution - Model Shipways - Scale 1:76 HMS Granado - CAF Model - 1:48 HMS Sphinx - Vanguard
sonicmcdude Posted October 28, 2013 #4 Posted October 28, 2013 Compare a metal ruler with a caliper and then use ONLY them. I compared a plastic triangle and is off almost by a mm. Greetings, Sinan Build log:TRITON POB 1:72
cdogg Posted October 28, 2013 #5 Posted October 28, 2013 Good to know. I also know what I am doing when I get home from work tonight! I have about 6 different rulers, thanks! Casey "I drank what?" - Socrates Current Builds: Corel Scotland Baltic Ketch 1775 AL Mare Nostrum 1/570 RMS Titanic - Revell Plastic Model Kit Finished Builds: Midwest The Dinghy Midwest Chesapeake Bay Flattie Midwest Muscongus Bay Lobster Smack Future Builds: Mamoli Golden Hind Mamoli Black Prince AL Swift
BANYAN Posted October 28, 2013 #6 Posted October 28, 2013 Sinan, but first check the caliper is accurate first Mine were out and I have just invested in a "Certifed" digital readout Caliper. Per, the other trick is to check them for straightness. I believe the check is done by using one edge to draw a line then flip the ule vertically (same edge but running the other way) and draw another line over that and see if they are coincident - repeat for the other edge. I use a square or solid base to rest the ruler on but you need to be sure the bases (short edges) of the ruler are square also. There used to be a good write-up on MSW 1 ... another lost .... cheers Pat sonicmcdude 1 If at first you do not suceed, try, and then try again!Current build: HMCSS Victoria (Scratch) Next build: HMAS Vampire (3D printed resin, scratch 1:350) Built: Battle Station (Scratch) and HM Bark Endeavour 1768 (kit 1:64)
Patrick Matthews Posted November 5, 2013 #7 Posted November 5, 2013 there's an old story somewhere about the buyer of a ship slipping into the shipyard one night and replacing the shipbuilders measuring stick with one that was stretched by 10 percent. Of course he ended up getting a ship 10 percent bigger! WackoWolf 1 Pat M. Matthews Model Marine Model FUNCTION as well as FORM. Get your boats wet!
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