View Single Post
Old 17th April 2010, 11:56 AM
Numb Nut's Avatar
Numb Nut Numb Nut is offline
Join Date: Apr 2009
Location: West Lothian
Posts: 43

Could be why the instructions for the skan pro 1 series 3 chrono suggests to keep the muzzle some distance from the chrono for accurate readings. Although they put it down to pulse of dirty air, it could just be caused by refraction as per your observation. Relevant bits of the chrono manual attached below:
Attached Images
File Type: jpg skan2a.jpg (23.3 KB, 8 views)
File Type: jpg skan2b.jpg (16.3 KB, 5 views)
Reply With Quote