why not fly with a fwd CoG I have read somewhere that the CG range offered in the manual still has a safety factor built in, so its pretty safe anywhere forward of 2/3rds back.
Here is an interesting point about CG. There are two primary ways that the pilot senses lift 1) increasing pressure in the buttocks, lower spine and inner ear by vertical acceleration 2) by a change of the location of the horizon (the tail raises) and the eyes sense the change The latter is interesting, as the mix of these two will result for some people in a sense lift as push forward or push in the back feeling. The dynamically and statically lighter the tail is, the faster it will rise (it rises in response to the change of angle of attack caused by the rising air). The faster is rises the easier it is to feel. A nose heavy CG slows the ‘rise’ response making it harder to feel the lift, this is most prominent when seeking bubbles and lines than big thermals. The diana 2 is know to be able to signal lift very well, this is likely why. (it has very low tail and boom mass, and less inertial and therefore faster to respond) Richard Frawley [email protected] We do not inherit the earth from our ancestors, we borrow it from our children > On 17 Jan 2019, at 10:43 am, Nick Gilbert <[email protected]> wrote: > > Mike, > > I’m sure this is the wrong answer, but to me it feels more comfortable > slightly nose high - so yawstring indicating right rudder required if turning > right. I fly with forward c of g which may be a factor. > > I have no idea if this is more or less efficient, and I’m under no impression > that it’s the optimal method. Just that it feels more comfortable. > > Nick. > > On 17 Jan 2019, at 10:09 am, Mike Borgelt <[email protected] > <mailto:[email protected]>> wrote: > >> Yes, to be pedantic it is trailing but common vernacular is to call the back >> end of the yaw string the direction it is pointing. >> >> Now can someone answer the questions please? >> >> 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? >> >> >> Mike >> >> At 09:12 AM 1/17/2019, you 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: <tel:%C3%82>  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: <tel:%C3%82>  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: <tel:%C3%82>  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] > http://lists.base64.com.au/listinfo/aus-soaring
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