Model Boat Mayhem
Technical, Techniques, Hints, and Tips => Modelling tools => Topic started by: richardwilde901 on August 31, 2021, 11:03:22 am
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Hello, I am working with a client and long story short we we are looking to measure engine parts and more specifically things like propeller shaft.
I use this (https://digitalmicrometers.co.uk/mitutoyo-500-196-30-absolute-aos-digimatic-caliper-0-150mm-0-6-thumb-r-w-o-output) standard caliper and passionately stand by it.
What are people using? Are there cheaper alternatives that offer good protection again dust and water?
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It will depend on power source, propeller size and type of boat.
Bob
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Also what are you trying to do, do you have the engine ? Hull design etc BTW its a vernier gauge not a calliper :-))
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BTW its a vernier gauge >>:-( ......well no.....there is no vernier graduation comparison function...
So it really is a digital [measuring] caliper [or a 6" adjustable spanner] {-)
The published accuracy of +/- 0.001" is acceptable, an experienced machinist well may be able to distinguish by feel with a micrometer down to 0.0005"
It is the repeatability of the digital caliper that is useful here.....a 1" reamer shank could display as 1.000", and a 1" shaft of precision ground steel may measure as 0.999"...measure each item 10 times and you will get the same repeatable dimension on each occasion
My 6 months old $25.00 Chinese digital caliper absolutely mirrors the dimension measured with my 60 year old $25.00 Polish vernier caliper
$25.00 some 60 years ago was about one weeks wage]........
Either a vernier caliper or a digital caliper would be 9/10's of useless if singularity used to measure a model engine bore {-)
Derek