In 1988 work at Trangie demonstrated a need to improve automatic jetting races (AJRs). In 1992 the Kondinin Group surveyed a number of sheep jetting races. This work also showed that they were less effective than hand jetting. Subsequently a project was undertaken to improve the performance of AJRs.
This Agnote reports the general principles for effective jetting. It includes diagrams of jetting equipment and a table with information about nozzle dimensions.