Inboard fixed vs. folding prop & ratings
There are different PHRF rating adjustments for different propellor types (fixed, folding and feathering) for the otherwise same boat. The Redwing should have a certificate that reflects his rating and it should show how it was rated. In some region you are required to pick one configuration and race under it for the whole season. Other regions permit multiple ratings. My boat when it was in Maine had two ratings that it raced under but here on the Chesapeake it only cna race under a single configuration.