At 05:07 PM 30/10/2009, you wrote:
For the best efficiency as a windmill, the prop needs to have a
large diameter and the delta-V (change in velocity along a
streamline) needs to be minimised, indicating that a descent at
close to minimum-sink speed would be required for maximum energy recovery.
Same propellor condition for efficiency as a prop. The airfoil on
most props doesn't have much to do with the prop efficiency. It is a
second order effect. Most props still use the ClarkY or an even more
antique section.
Mike
Borgelt Instruments - manufacturers of quality soaring instruments since 1978
phone Int'l + 61 746 355784
fax Int'l + 61 746 358796
cellphone Int'l + 61 428 355784
email: mborg...@borgeltinstruments.com
website: www.borgeltinstruments.com
_______________________________________________
Aus-soaring mailing list
Aus-soaring@lists.internode.on.net
To check or change subscription details, visit:
http://lists.internode.on.net/mailman/listinfo/aus-soaring
