Prop load factor is length to the fourth power times pitch:
Load Factor = Length^4 x Pitch
15x4 load factor = 202,500
10x6 load factor = 60,000
So a 15x4 prop places 3.375 times the load on an engine as a 10x6.
ORIGINAL: SBOT
Jimmyj
I don't know if the load factor that Red was talking about works or not but it was dia. squared X pitch so a 15x4 would have a load of 900 and a 10x6 would have aload of 600. 15x15=225x4=900 10x10=100x6=600 So they are not the same at all the 15x4 would place1/3 more load on the engine.