Hello Mike, *When circling in a thermal, do you * *a) keep the string centered* *b) fly with it pointing to the outside of the turn* *c) why?*
OK, the image of the string off centre is exaggerated in Dick Johnson's picture and drawing. The marks on the canopy might suit the *e*ta. As Reg stated: *"I have the free end of the string pointing a few degrees to the outside of the turn."* That's what I do as well. In a two-seater, the front string, being approximately 100mm long is pointing approximately 3mm to the outside of the turn when established in a thermal. The rear seat string points less to the outside in that situation. Similar for a single seater. The slip indicator is also perfectly located in the centre during these turns - when the string is a few degrees to the outside. Another cue for flying clean is that the noise is the lowest and even from both sides of the wing root where the tape dislodged evenly. (Although that's not a clean wing root and not "clean flying" as a result - but it happens in club trainers.) Hope this explains better my theory and experience on that matter. thank you Erich Here is another point for discussion: passengers are more likely to experience air sickness when the string is in the centre during turns. I usually add a few extra mm of "string out" during passenger flights with excellent results so far. On Thu, 17 Jan 2019 at 12:30, Reg Moore <[email protected]> wrote: > I have the free end of the string pointing a few degrees to the outside of > the turn. > > On 17 Jan 2019, at 9:42 am, Bob Dircks <[email protected]> wrote: > > Mike, > In your original question, > > Part b, > > By "pointing" I presume you mean "trailing" ? > > To me, in this case "pointing" could be the direction of the forward end > of the string. > > > On Thu, 17 Jan. 2019, 9:54 am Mike Borgelt < > [email protected] wrote: > >> So how about answering the questions? >> >> >> Mike >> >> At 08:51 AM 1/17/2019, you wrote: >> >> and what is the expected differential (gain/loss) with say a 10degree >> slip indication variation, given all the other factors that determine climb >> rate. >> >> This might b able to be worked out mathematically given the airflows >> angle on the wing and fuselage drags differences >> >> I suspect that are several aerodynamic factors would have to be >> considered, especially given the the thermal core is dynamic. >> >> A question for modern designers perhaps, especially when all aviation >> design is a trade off >> >> >> >> >> >> >> >> >> >> >> Richard Frawley >> [email protected] >> >> We do not inherit the earth from our ancestors, we borrow it from our >> children >> >> >> >> >> >> >> >> On 17 Jan 2019, at 9:43 am, Mike Borgelt < >> [email protected]> wrote: >> >> At 07:36 AM 1/17/2019, you wrote: >> >> Perhaps the more important question is how to you tell if one technique >> is better than another. What is a useful baseline? >> >> >> >> >> >> Climbing better than the other gliders is the test but what if everybody >> is using the same less than optimum technique? >> >> Mike >> >> >> >> >> >> >> On 17 Jan 2019, at 7:16 am, Mike Borgelt < >> [email protected]> wrote: >> >> When circling in a thermal, do you >> a) keep the string centered >> b) fly with it pointing to the outside of the turn >> c) why? >> >> >> Your technique may not be doing what you think it is. >> >> Mike >> >> >> >> >> >> >> *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 >> _______________________________________________ >> Aus-soaring mailing list >> [email protected] >> http://lists.base64.com.au/listinfo/aus-soaring >> >> _______________________________________________ Aus-soaring mailing list >> [email protected] >> http://lists.base64.com.au/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 >> _______________________________________________ >> Aus-soaring mailing list >> [email protected] >> http://lists.base64.com.au/listinfo/aus-soaring >> >> >> _______________________________________________ Aus-soaring mailing list >> [email protected] >> http://lists.base64.com.au/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 >> _______________________________________________ >> Aus-soaring mailing list >> [email protected] >> http://lists.base64.com.au/listinfo/aus-soaring >> > _______________________________________________ > Aus-soaring mailing list > [email protected] > http://lists.base64.com.au/listinfo/aus-soaring > > _______________________________________________ > Aus-soaring mailing list > [email protected] > http://lists.base64.com.au/listinfo/aus-soaring >
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