Hello guys!
I have a Brian Eather 3b CF prop, 12,5" x 4" and need to go up to 5" or 5,5"...
Need advice on the propper procedure to achieve this.
In addition to Jim's excellent advice, if you have a target pitch, set the pitch on the scale, and then use a spring clamp to hold the pitch gauge blade at the right setting. Then adjust it successively until it matches. This way you can be sure you are setting the target the same on all three blades. Work from the center to the edge - do all three prop blades at station 5, reset the guage, then move to 7, out to the tip. I usually skip every other station until I get to the tip, the last inch or so, I do each one.
They do generally need boiling water, not just hot - an Eather prop will not budge unless it is nearly at full boiling water temperature. Bollys can take a lot less, and also have a tendency to tweak themselves in a hot car. Mark each station with a pencil as you are doing it, then only dip the prop into the water far enough to hit your current station, and leave the previous station out of the water, so you have less tendency to change earlier settings after you have done them.
Brett