I’ve recently started contributing to OSM and the other day I was on one of the moors near where I live. On this moor there are the wreckages of a few planes that have crashed over the year and I have recorded the position of these and was wondering if there was an appropriate tag to mark these on OSM with. Anybody know if there is?
So I’d suggest something like historic=aircraft_wreck.
In general these should be only used when some evidence on the ground remains fo the wreckage. For large scale aircraft disasters there will usually be a memorial which should be mapped in lieu of the actual site of the crash. (e.g., Mull of Kintyre helicopter crash, http://www.openstreetmap.org/node/523257063))