Oli Glaser wrote: > Yes, I guess 1000 feet would be more of a problem. > However, I think both situations would comfortably fit into the "not=20 > particularly pleasing" category though.. :-) >=20 Agreed - the amount of paperwork required.... The double spark makes little difference to the RPM but it is only=20 checked on the ground - you do not switch off one mag in flight (ok you=20 do if the engine starts misfiring as one mag could have lost sync) so I=20 am not sure if a /single/ mag failure would be noticed. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .