As posted on Triathletemag.com, very brief article, but the conclusions when testing the effects of drafting off another cyclist:
"After evaluating the data, the team determined that under perfect testing conditions, the drafting benefit decreases rapidly as the drafting distance approaches 5.8 meters (two bike lengths). At drafting distances greater than 5.8 meters, the drafting benefit continues to drop, but at a greatly reduced rate. Although the engineers were not able to test for distances greater than 7.7 meters, the data suggests that a rider trailing at six bike lengths would enjoy a draft effect similar to that of a rider at three bike lengths. What does that mean? Ironman's three bike-length rule remains intact."
T
"The mind can calculate, but the spirit yearns, and the heart knows what the heart knows."
"After evaluating the data, the team determined that under perfect testing conditions, the drafting benefit decreases rapidly as the drafting distance approaches 5.8 meters (two bike lengths). At drafting distances greater than 5.8 meters, the drafting benefit continues to drop, but at a greatly reduced rate. Although the engineers were not able to test for distances greater than 7.7 meters, the data suggests that a rider trailing at six bike lengths would enjoy a draft effect similar to that of a rider at three bike lengths. What does that mean? Ironman's three bike-length rule remains intact."
T
"The mind can calculate, but the spirit yearns, and the heart knows what the heart knows."