Thanks Terry and David.
I'll dig through my props for an 11x5. I know I have an APC 9x7 and 9x8. I used the 10x6 since it's easy to compare to existing data for other forties.
The header is 4 7/8" long measured the way shown on the Mac's site (see image below). Here is the info from their site:
| ST S 40 | Zinger 10 X 6 | 7.5mp | 13,550 | 14,850 | 4.75" |
The first number is open exhaust, the second with the header at 4 3/4" length.
What's interesting is that Zingers are a lighter load than APC's, yet I still bettered their figure!
You need to download Pe's spreadsheet for calculations. It's excellent:
http://mvvs.nl/prop-power-calculator.xls
And, you can use Open Office Calc to run the file.
David