Hi, I guess that indexing a prop is a US term, cos I have not heard it in UK, so I am guessing what is meant.
I think in many cases it is a practical choice rather than an engineering decision. Assuming that the prop is well balanced, the orientation should not make any difference what way round it is, however in the case of props on hand swung VW engines, if you put the prop on 120 degrees out, it will be a pig to start, because you reach TDC with the prop at something like 300 true, or down by your boot laces. I know that there are blokes out there that like to try anything just to prove it can be done.... Ah, finally, *ugger, *ollocks and other anglo-saxon words are perfectly acceptable english when the prop kicks back and catches you across the knuckles. Pete Diffey St Albans, UK
