What are the main factors affecting IC performance?
The IC is a slow boat – a fun boat, but slow. Other than the obvious factors of technique and experience, increasing straight-line boat speed comes down to the essentials. These include (1) boat at minimum weight with lightest possible bow tip weight, (2) combined crew weight not drastically over the minimum (315 lb. dressed), (3) a straight rig (no permanent bends) tuned to the sailmakers settings, (4) a good sail, (5) a relatively stiff and fair hull and (6) good foils. Other factors include the quality of the hardware, centerboard pin position (older boats have the pin further aft) and general layout. There are plenty of sailors out there going very fast in old wood and fiberglass InterClubs with the right gear and set-up.
