Sitka Spruce Metirc Size Sources
We are building a German designed ULF-1 micolift sailplane and have been doing weight comparisons between the metric size spruce indicated on the plans in whole mm and the nearest sizes available in inches here in the US. In most cases we must select sizes slightly larger in inches. This could produce a serious weight penalty for the finished aircraft. Does anyone know a source of metric sized spruce here in the US, or a company that will mill in mm??
Many thanks, Holliday Obrecht
Metric Size for Sitka Spruce
Most woodworking/cabinet maker type shops will have a parallel sander - may not be the name of it, but it is a large piece of kit that will sand, single, multiple, or very wide sheets of material to whatever thickness you need.
If you are concerned about the weight - and not the cost of turning that lovely Spruce into sawdust, I am sure you could have the imperial measurements sanded down to the metric size.
I agree with the other reply you got that the difference in weight will be small - an Excel spreadsheet with all the pieces listed will soon tell you the exact theo weight difference between the 2 mesurement systems.
Without a doubt - the metric system is a whole lot easier to use!!
Good luck, happy sanding!!
Mark B.