Here's a new towplane:
http://www.windcraft.fi/pik27/welcome.htm
Might be somewhat more efficient than a Pawnee. I once calculated
that of the 235HP in the Pawnee about 25 was effectively climbing a
500 KG glider on tow. A stunning 11% or so efficiency and that
doesn't even account for the Pawnee's descent. About half the Pawnee
installed power is lost in the prop at climb speed. These are
approximate numbers.
So how many tows per hour and liters per hour are Pawnee towplane
operators getting? Liters per 2000 foot tow would be an interesting number.
Mike
Borgelt Instruments - manufacturers of quality soaring instruments
phone Int'l + 61 746 355784
fax Int'l + 61 746 358796
cellphone Int'l + 61 428 355784
Int'l + 61 429 355784
email: [EMAIL PROTECTED]
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
