Unfortunately it probably won't be this miraculous. The 19% drag reduction is only for the profile drag from the wing (and may be pretty optimistic too for a Cirrus). Depending on the glider, the wing profile drag is around 40% of your overall drag at your best L/D. They quote a best benefit for a 15m sailplane to be only 7% at most at Best L/D which is consistant with the 40% mark.
When I last read standardcirrus.org they were quoting 3-5% performance improvement with turbulators (consistant with ~13% drag reduction of the profile drag of the wing). So at best Dr. Sinha has developed a 'low drag' turbulator strip which will get you another few glide points. I will be interested to see how Dr. Sinha's turbulator film handles the change in transition point with different speeds. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of ANDREW WRIGHT Sent: Tuesday, 23 September 2003 10:14 AM To: [EMAIL PROTECTED] Cc: Steve Pegler Subject: [aus-soaring] Much less drag Question - How does you improve the performance of a Standard Cirrus by up to 19% (I.e. Turn a theoretically 38/1 glider into a 45/1 glider.) Read about flight test results of the new Sinha Flexible Composite Surface applied to the underside surface of a Standard Cirrus sailplane (#60) at; http://www.standardcirrus.org/ (At the bottom right hand side of the page.) (If this works I will not need to by a new LS8, I will just turn my Cirrus into one !!!! ) Happy soaring ANDREW WRIGHT -- * You are subscribed to the aus-soaring mailing list. * To Unsubscribe: send email to [EMAIL PROTECTED] * with "unsubscribe aus-soaring" in the body of the message * or with "help" in the body of the message for more information. -- * You are subscribed to the aus-soaring mailing list. * To Unsubscribe: send email to [EMAIL PROTECTED] * with "unsubscribe aus-soaring" in the body of the message * or with "help" in the body of the message for more information.
