Metal vs. Wood - AVweb
AVweb As we discussed in Part 1 last month, after buying and testing a new Sterba wood propeller for my Hatz biplane, it was clear it had too much pitch. For reasons discussed in the previous article, I had decided to replace the old Sensenich metal prop with a new wood prop. Selecting a propeller for an Experimental aircraft is always partly guesswork as no two homebuilts are exactly the same. To compound the problem, different prop makers shape and measure things differently, so the numbers aren’t directly comparable. Cross section showing material removed at 75% radius...
Source: avweb.com