Looking at the photo's, the "Winglets" on the tailplane are set well into the span (not at the tips of the tailplane) and point down, which leads me to wonder if they are part of the elevator mass balance system rather than winglets. you would expect winglets to be part of the tips of the horizontal stabaliser, where they could reduce tip vortices and therefore induced drag.
John Parncutt -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Mike Borgelt Sent: Sunday, 7 August 2005 7:53 PM To: Discussion of issues relating to Soaring inAustralia. Subject: Re: [Aus-soaring] Re: Aus-soaring Digest, Vol 23, Issue 5 At 07:37 PM 6/08/05 +1000, you wrote: >If winglets work so well, why are there no tail-lets? Take a look at a Beech 1900 at www.airliners.net I noticed this while helping refuel one at Forrest one stormy night a few years ago. Not only tailets but a BIPLANE tail. I suspect the "tailets" and biplane tail were a result of the Kingair stretch and in testing they found they needed more area on horizontal and vertical stabs but the bean counters wouldn't ante up for a new tail so they hung some bits on the old one. AND, when the >future of jet turbine turbo's and self-launchers finally arrives, >(please hurry up, Mike B) will they need to be mounted on a topstick, or >can they be low mounted behind the cockpit, such as the trial Apis unit. >Wont this mounting area be a little harsh on our dry, fire prone strips? Low is fine. It is easy to arrange the exhaust parallel to the ground and I'm told you can stand 7 meters behind the exhaust without harm. 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 [email protected] To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring _______________________________________________ Aus-soaring mailing list [email protected] To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
