Originally Posted by BobRCnut
??? Sometimes, wing AREA is expressed as SQ. DM. (square decimeters), but I can't recall any metric units of weight that would fit 'SP'. Does this plane have an airspeed indicator calibrated in furlongs per fortnight?
The replys are much appreciated, its just this made me smile cause I have no idea what a furlong or fortnight is
But I have been trying to read alot. There is a big learning curve!