Straw poll. Has anyone, had a vario failure.
Sent from my iPhone > On 27 Apr 2015, at 19:14, Nick Gilbert <cirru...@gmail.com> wrote: > > Surely a backup electric vario is a more useful backup than a mechanical? > With its own emergency battery you get a backup audio and averager as well as > the needle. With all the stress that goes with a power failure having to > stare at the instrument would make things worse. > > Nick > > >> On 27 Apr 2015, at 5:41 pm, Peter Champness <plchampn...@gmail.com> wrote: >> >> I have just been choosing instruments for a new glider. >> >> I did wonder for a moment after reading Adam's post whether I had wasted >> money on the Winter Vario. >> >> However I agree with Mike. A set on basic instruments (redundancy) is good >> insurance. In my case I have something in case of electrical failure. >> >> No doubt thermal can be found and used without any instruments, but it >> difficult. >> >>> On Mon, Apr 27, 2015 at 5:32 PM, Mike Borgelt >>> <mborg...@borgeltinstruments.com> wrote: >>> At 08:14 AM 27/04/2015, you wrote: >>> >>> There’s no need for a winter backup now >>> >>> Maybe not a Winter vario as backup but you should have a backup. Adam's >>> advice is probably the silliest thing I've read in a long time. >>> >>> The only time you may reasonably want to rely on one vario is in a >>> motorglider if you are prepared to start the motor and fly home if the >>> single vario fails. >>> >>> Too bad if you are half way round a 500km triangle and set to win the >>> Nationals if you do reasonably this day. >>> >>> For the paleo engineless gliders you are likely to risk an outlanding with >>> its attendant hazards. Pretty stupid to risk breaking your glider or >>> yourself over lack of a backup. >>> >>> If you are serious about competition you should be equipped to cope with >>> single failures of equipment. Most people carry two flight recorders for >>> good reason. >>> >>> A main navigation system and some reasonable backup is also necessary. >>> Hint: fly with the backups working. The time to find out they have failed >>> is NOT when you've had another failure. >>> >>> The backup vario may also have a different speed of response and will >>> likely just display TE vario. Your primary should be showing netto >>> (airmass) or relative netto ( airmass offset down by the sink rate in >>> circling flight - this means it always shows the rate of climb you would >>> get if you slowed down and circled, no matter your current airspeed). The >>> two varios may show slightly different information without changing modes >>> which can be useful. >>> >>> We've all had even modern electronic equipment fail. Phones, PC's GPS , etc >>> etc. It is pretty good nowadays but anyone doing what Adam says is tempting >>> fate, Murphy's Law and what a physics teacher of mine called "the innate >>> cussedness of inanimate matter". >>> >>> When you decide to use a backup you might like to consider that the Winter >>> doesn't have an audio or an averager. Do you really want to be sharing >>> thermals with other gliders without an audio? If flying cross country you >>> would find you would miss the averager. >>> >>> If you have a backup electronic vario it should have its own independent >>> backup power supply. While a glider electrical system can be fused properly >>> so that the radio for example developing an internal short doesn't take out >>> the main battery fuse (and if everything dies because of this or similar , >>> are you going to simply flip the switch to battery 2 and take out *its* >>> fuse also?) I suspect many aren't. >>> >>> If you decide to join the 21st century for your backup vario get in touch >>> and I'll sell you something you'll be happy to fly with when you need it. >>> >>> Mike >>> >>> >>> >>> >>> >>> >>> >>> >>>> ____________________________________ >>>> Aus-soaring mailing list >>>> Aus-soaring@lists.internode.on.net >>>> 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 >>> >>> >>> _______________________________________________ >>> Aus-soaring mailing list >>> Aus-soaring@lists.internode.on.net >>> To check or change subscription details, visit: >>> http://lists.internode.on.net/mailman/listinfo/aus-soaring >> >> _______________________________________________ >> Aus-soaring mailing list >> Aus-soaring@lists.internode.on.net >> To check or change subscription details, visit: >> http://lists.internode.on.net/mailman/listinfo/aus-soaring > _______________________________________________ > Aus-soaring mailing list > Aus-soaring@lists.internode.on.net > To check or change subscription details, visit: > http://lists.internode.on.net/mailman/listinfo/aus-soaring
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