Swing in Swing out less ambiguous?
Swing infers a pivot point does it not? > On 17 Jan 2019, at 10:33 am, Bob Dircks <[email protected]> wrote: > > Good points Richard, > > However I still find the use of the word "pointing" very ambiguous. > > I suggest that "pointing" indicates a direction radiating from the viewpoint. > This would have us discussing the forward direction of the string, while it > is more common to consider the rearward direction of the string..... ie it's > trailing direction. > > > > On Thu, 17 Jan. 2019, 10:18 am Richard Frawley <[email protected] > <mailto:[email protected]> wrote: > the string can be either pointing in to the thermal centre or pointing out > away from the core > > there is some conjecture that with some aircraft (I read that it was mainly > older pre-1980 craft) that with the string pointing to the outside, they may > be more efficient in the climb. > > There are also some views that say that polyhedral vs straight wings tend to > set up a balance that has the string pointing out. > > I have not yet seen any empiric data or detailed theory that speaks to these > suppositions, I expect it exists somewhere tho. > > More questions and less answers still….. > > > > > > > > > Richard Frawley > [email protected] <mailto:[email protected]> > > We do not inherit the earth from our ancestors, we borrow it from our children > > > > > > > >> On 17 Jan 2019, at 10:12 am, Bob Dircks <[email protected] >> <mailto:[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] >> <mailto:[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] <mailto:[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] >>>> <mailto:[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] <mailto:[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 <http://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] <mailto:[email protected]> >>>>>> http://lists.base64.com.au/listinfo/aus-soaring >>>>>> <http://lists.base64.com.au/listinfo/aus-soaring>_______________________________________________ >>>>>> Aus-soaring mailing list [email protected] >>>>>> <mailto:[email protected]> >>>>>> http://lists.base64.com.au/listinfo/aus-soaring >>>>>> <http://lists.base64.com.au/listinfo/aus-soaring> >>>> Borgelt Instruments - design & manufacture of quality soaring >>>> instrumentation since 1978 >>>> www.borgeltinstruments.com <http://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] <mailto:[email protected]> >>>> http://lists.base64.com.au/listinfo/aus-soaring >>>> <http://lists.base64.com.au/listinfo/aus-soaring> >>> _______________________________________________ Aus-soaring mailing list >>> [email protected] <mailto:[email protected]> >>> http://lists.base64.com.au/listinfo/aus-soaring >>> <http://lists.base64.com.au/listinfo/aus-soaring>Borgelt Instruments - >>> design & manufacture of quality soaring instrumentation since 1978 >> www.borgeltinstruments.com >> <http://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] <mailto:[email protected]> >> http://lists.base64.com.au/listinfo/aus-soaring >> <http://lists.base64.com.au/listinfo/aus-soaring> >> _______________________________________________ >> Aus-soaring mailing list >> [email protected] <mailto:[email protected]> >> http://lists.base64.com.au/listinfo/aus-soaring >> <http://lists.base64.com.au/listinfo/aus-soaring> > > _______________________________________________ > Aus-soaring mailing list > [email protected] <mailto:[email protected]> > http://lists.base64.com.au/listinfo/aus-soaring > <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
