There are several points to consider. All of the large sailplanes will readily spin with the exception of the S10.
In general this will occur while thermalling with positive flap selected. When entering a spin in this configuration the first action must be select full reflex flap. Applying normal spin recovery technique while positive flap remains set will cause the sailplane to accelerate so rapidly that in all probability the torsional strength of the wing will be exceeded. Poof: an outer wing panel separates and then there is no ability to recover, nor is there any way to bale out due rolling "G's". With such rapid acceleration the aircraft will disintegrate. NOW; You all know the purpose of the stabiliser - fixed with an elevator - or "all flying". It is to provide a down-load to stop the aircraft pitching nose-down. What will happen when the stabiliser is placed its full forward position - that is its maximum angle of attack. The tailplane is no different to the wing. It will stall for the same reasons its preceding wing does and if its stall occurs before the wing then a serious situation rapidly develops. The stab is stalled. The wing will pitch down. What is the recovery procedure. Un-stall the stab. using back stick to decrease its AoA. Then - with gentle elevator input - try to regain control. Another issue. Some years ago I flew many pilots in a two-seat sailplane and deliberately - on down-wind and about to enter base - slipped the positive flap into full reflex. In all cases they immediately lowered the nose and an extremely high rate of descent occurred. A bit lower and we'd have impacted the ground. What should have occurred. FOOD FOR THOUGHT. Noel. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Monday, 9 March 2015 12:00 PM To: [email protected] Subject: Aus-soaring Digest, Vol 138, Issue 7 Send Aus-soaring mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit http://lists.internode.on.net/mailman/listinfo/aus-soaring or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of Aus-soaring digest..." Today's Topics: 1. Bill Walker and David Speight (Ron Sanders) 2. Re: Bill Walker and David Speight (Mike Borgelt) ---------------------------------------------------------------------- Message: 1 Date: Sun, 8 Mar 2015 19:28:28 +0800 From: Ron Sanders <[email protected]> Subject: [Aus-soaring] Bill Walker and David Speight To: "Discussion of issues relating to Soaring in Australia." <[email protected]> Message-ID: <caps+alxu2d0l6dfxhx0e9f2bc3xj69qvkuom4oadtur0ug3...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Guys, it is probably too soon just now but i really would like to see or find an accident report wherein the reason for the demise of these two very very experienced pilots is stated. They were flying a modern glider. We never seem to hear what actually happened in a lot of accidents. I want to know so that i Can continue flying but be and OLD pilot , not BOLD. I want make sure I don't do what they did. Ron -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.internode.on.net/mailman/private/aus-soaring/attachments/20150 308/3ff6fea4/attachment.html> ------------------------------ Message: 2 Date: Mon, 09 Mar 2015 08:30:36 +1000 From: Mike Borgelt <[email protected]> Subject: Re: [Aus-soaring] Bill Walker and David Speight To: "Discussion of issues relating to Soaring in Australia." <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii"; Format="flowed" Not only that one but there have been a couple of other large high performance two seater accidents for what appeared to be no good reason. Is it something to do with the "two seat" bit? Mike At 09:28 PM 8/03/2015, you wrote: >Guys, it is probably too soon just now but i really would like to see >or find an accident report wherein the reason for the demise of these >two very very experienced pilots is stated. They were flying a modern >glider. We never seem to hear what actually happened in a lot of >accidents. I want to know so that i Can continue flying but be and OLD >pilot , not BOLD. I want make sure I don't do what they did. > >Ron >_______________________________________________ >Aus-soaring mailing list >[email protected] >To check or change subscription details, visit: >http://lists.internode.on.net/mailman/listinfo/aus-soaring Borgelt Instruments - design & manufacture of quality soaring instrumentation since 1978 www.borgeltinstruments.com tel: 07 4635 5784 overseas: int+61-7-4635 5784 mob: 042835 5784 : int+61-42835 5784 P O Box 4607, Toowoomba East, QLD 4350, Australia -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.internode.on.net/mailman/private/aus-soaring/attachments/20150 309/87d7b883/attachment.html> ------------------------------ _______________________________________________ Aus-soaring mailing list [email protected] http://lists.internode.on.net/mailman/listinfo/aus-soaring End of Aus-soaring Digest, Vol 138, Issue 7 ******************************************* _______________________________________________ Aus-soaring mailing list [email protected] To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
