Then on the FAQ page:
" At maximum power, you may experience a 0-4 mph reduction, but this depends on the particular aircraft. At normal cruising speed there is no noticeable reduction. "
For me maximum power typically is cruise power. The speed loss will tend to be on the higher side in a low drag airframe.
VGs locally energize the boundary layer to keep the flow attached. This takes energy. Unfortunately a nice laminar flow section is turned into a partially turbulent flow wing. Everything is a trade-off.
A previous link on the LML to Bob Belshe's 235 VG mod also reported a reduction in cruise speed of a couple knots.
Here is another link to a flight test report of a Bonanza with a VG upgrade.
http://www.nar-associates.com/technical-flying/vortex/Vgs_cruise_wide_screen.pdf
Chris Zavatson
N91CZ
360std
Sent from my spiffy iPad
Nice info on the VG's! I've been contemplating whether to install the extended wingtips on my 360 MkII, now it looks like I have another option to reduce the stall speed. Assuming I even need that.
This doesn't make the decision-making process any easier.
-Rob
Lancair 360MkII
15% Complete
Pittsburgh, PA
HI THERE
here is the link for vortex generator kits for Lancair aircraft
http://www.pnwaero.com/Lancair.htmi was very happy with the company and with the results
peter williams