And there it is... Having now tried at least 8 different manufacturers modern (released in the last 5 years) varios, in terms of gust rejection I find they all work very well until they get hit with the strong, narrow, gusty summer thermals we get between trigger time and the late afternoon when things usually tend smooth out.
To my observation, They all struggle to effectively differentiate strong horizontal components from the vertical components and for good reason when one takes the time to fully understand the physics and resolutions of systems involved. To date, I have seen a lot of claims with little or no scientific method to back them up and so far, little observable operational difference when it comes to this one aspect. Modern varios of course now have many functional aspects to consider in your particular selection and by all accounts the pilots built in posterior indicator is still the best filter. I do feel it's important to mention that The effects of Gusts are much stronger than many pilots perhaps give credit for. As Paul Mander points out in his Speedweek sessions, if you lose the core it far less likely that the thermal has moved (as many think is the case) but rather that the horizontal gust has simply moved the aircraft off its optimal path, as after all, there are magnitudes of differences of inertia of a thermal air mass and a tiny glider. Richard > On 28 Apr 2015, at 12:30 pm, [email protected] wrote: > > 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. Re: ClearNav Vario (go_soaring) > 2. Re: varios, redundancy (DMcD) > 3. Re: varios, redundancy (Jim Staniforth) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 28 Apr 2015 08:45:13 +1000 > From: go_soaring <[email protected]> > Subject: Re: [Aus-soaring] ClearNav Vario > To: "Discussion of issues relating to Soaring in Australia." > <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset="utf-8" > > Another report on the new CNv from a user in the states. > > I concur on 1 sec time constants for pointer and audio. The vario signal is > very smooth at this speed. > > I am in love with the new climb audio!!!!!! It's much better at > communicating lift in the 0 - 3 kt range than anything Cambridge or > "Cambridge-like" (including CNv 2.7). The pointer is 99% superfluous now. > Audio plus averager numbers and I'm good to go! > > I found the climb & cruise vario & wind information flawless in Eastern US > soaring conditions. Yes, a big Western US gust on the nose will still peg > the vario. We're working on that now. > > The correlation between seat of the pants and the vario is now excellent. > 2.7 was better than the Cambridge 302 in this regard, but wasn't the > breakthrough sought. Some users liked CNv 1.0 better than 2.x.... 3.0 is a > quantum leap. The correlation is so good now, that it is very easy to tell > gusts from thermals (because there's no seat of the pants thump preceding the > vario indication. > > The navigation UI still needs work. It's perfectly functional, but it's too > much head in the cockpit time to manage. > > >> On 27 Apr 2015, at 08:14, Adam Woolley <[email protected]> wrote: >> >> Simply phenomenal, I thought the CNv 2.7 was my favourite vario before, now >> CNv 3.0 it's clearly in the lead. I test flew with V3.0 yesterday in very >> windy thermal conditions before being able to transfer into local wave. The >> vario is extremely smooth, no sign of gusts (with the new gust filtering >> algorithm), the smart averager being quicker to update and far more accurate >> than the last version. I flew with 1.7s response rate at the beginning, >> then reduced it to 0.5s, followed by settling at 1.0s; all as smooth and >> perfect as the other! >> >> Are you looking for a new vario for your glider or club, and want to save >> money? It?s simple now, just buy a ClearNav vario - and thats it. There?s >> no need for a winter backup now, this vario is impressive. I?ve flown with >> my vario since the first various were bought out, it?s never failed. I only >> fly with one vario now in my glider, and trust it solely. >> >> I found the wind update to be excellent, though I can understand why some >> want straight line wind updates incorporated - only once I got into the >> wave, I found the wind would only update at the 180* turn upon each lap of >> the wave bar. Still, it's excellent! Thankfully, in AUS we only race in >> thermic conditions, so this will never be an issue for us here. >> >> The new audio is great too. My only gripe (which will soon become an >> option), was the tone that sounded every time you?d transfer from cruise to >> climb. It really didn't bother me as such, but would like it to be silent >> as it was before. >> >> All in all, amazing work from the CNv team - I look forward to future >> updates, and to see/feel/hear the vario when all the sensors are hooked up. >> Wow! >> >> >> Cheers, >> WPP >> _______________________________________________ >> Aus-soaring mailing list >> [email protected] >> To check or change subscription details, visit: >> http://lists.internode.on.net/mailman/listinfo/aus-soaring > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.internode.on.net/mailman/private/aus-soaring/attachments/20150428/65110269/attachment.html> > > ------------------------------ > > Message: 2 > Date: Tue, 28 Apr 2015 09:29:56 +1000 > From: DMcD <[email protected]> > Subject: Re: [Aus-soaring] varios, redundancy > To: "Discussion of issues relating to Soaring in Australia." > <[email protected]> > Message-ID: > <cad0mmpx1bfhhwbktgrnnkc3x--_pu33q9ycu5sw379jek9z...@mail.gmail.com> > Content-Type: text/plain; charset=UTF-8 > >>> The Winter got me home on the last weak thermal of the day a couple of >>> times. The electrics were still working fine, but the Winter had greater >>> sensitivity. > > Agreed. Although I use the audio from an electrovario, there's > something about the way the Winter needle moves which tells you far > more about the air in the immediate vicinity of a thermal. That and > your arse. > > You hear the noise from the noisy vario, glance down at the vibrating > needle of the Winter and then wait to turn or pass it up. I rarely > look at the electric thing other than to see what the average is after > a few turns. > > My opinion is that the undamped mechanical varios are very useful indeed. > > D > > > ------------------------------ > > Message: 3 > Date: Mon, 27 Apr 2015 16:50:56 -0700 > From: Jim Staniforth <[email protected]> > Subject: Re: [Aus-soaring] varios, redundancy > To: "Discussion of issues relating to Soaring in Australia." > <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset=windows-1252; format=flowed > > Mike was the first to include this feature, but... > Every electric vario can have a backup battery. > Pardon the Text-O-CAD. > Jim > SPDT ON/ON Switch > | > Main Supply + _________ > \______ Instrument + > Backup Supply + _______ > > > > ------------------------------ > > _______________________________________________ > Aus-soaring mailing list > [email protected] > http://lists.internode.on.net/mailman/listinfo/aus-soaring > > End of Aus-soaring Digest, Vol 139, Issue 48 > ******************************************** _______________________________________________ Aus-soaring mailing list [email protected] To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
