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Today's Topics:
1. Re: varios, redundancy (Ian Mc Phee)
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Message: 1
Date: Wed, 29 Apr 2015 10:04:17 +1000
From: Ian Mc Phee <[email protected]>
Subject: Re: [Aus-soaring] varios, redundancy
To: "Discussion of issues relating to Soaring in Australia."
<[email protected]>
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<CAAMD4Kon+em9qP-6n-DBQFvceoKA=fd1r216xa1ljmkprq_...@mail.gmail.com>
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Notice my name or products has been used a few times.
1 I certainly agree with air vents say infront of compass and cover inside
of hole(s) with fly gauze & this idea certainly came from Mike. Electrics
hate excess heat so PLEASE do this during this winter.
2 Pilots have alerted me to the faster, 0.9 lit Winter vario & I now
recommend this unit & the only one I stock these days. Another good
Winter vario is the logarithmic which has expanded in low range but have
not flown with this type recently.
3 If using a mechanical then T as close to probe as possible (minimum under
spar). Some pilots have an air switch so winter is not on probe & they
cover up the mechanical but can always be uncovered and used if electric
failure.
4 Statics etc MUST be covered up if rain is around & in hornet season the
worst is a partly blocked tube.
5 I am sure all varios brands are making quantum leap forward over the
last few year and especially on those gusty broken days. I can say ClearNav
vario is much improved (esp the latest version 3.0) over the earlier
Cambridge 302 which I considered was a great vario but is now 10 years old.
If you would like to try a clearnav vario just ask for a loaner.
6 I think many vario issues are associated with plumbing. Eg partly
blocked line, leak with old plastic plumbing (silicon tube always seals),
leaking Winter case, the instrument barb on a winter flask being unscrewed
slightly & slight leak, etc. Electric issues can be as simple as voltage
drop across fuse because fuse has been heated by maybe a surge of power and
that was also suggested by Mike guess 25 years or so.
I could bang on about radio issues & is often aerial & power supply. I
have an aerial checker (no radio needed) & again it is available for loan.
Be real careful with a glider that has broken back or very early Cirrus or
Libelle I built aerial or Nimbus 3 or 4 with aerial I rudder with that BNC
that is not sealed from water.
That's all for the moment.
Ian Mc Phee
0428847642
Box 657 Byron Bay NSW 2481
On 28/04/2015 9:03 PM, "go_soaring" <[email protected]> wrote:
> The vent hole on the shroud is an excellent idea, McPhee alerted me to
> that you came up with that idea - it's on my list to do this form2. I can
> only imagine the life span it'd take away from my instruments.
>
> I'd like to change my shroud color too, the color wasn't chosen by me.
> Another one of those jobs to get around too..
>
> Re: fuses, there's an extra one on my panel for the electric bug wipers
> that'll one day find themselves installed.
>
> On a side note, I'm with James Dutschke - the B700 is amazing as a vario.
> It'd be also great as a sole vario in your glider. I've in fact have owned
> two, reason: to long to describe, rest assured it was for good reasons!
>
>
> Safe Circles,
> WPP
>
>
> On 28 Apr 2015, at 19:26, Mike Borgelt <[email protected]>
> wrote:
>
> I don't see a magnetic compass. Isn't compliant with airworthiness
> requirements.
>
> Also nasty shine on the black instrument panel cover. Humbrol Matt Black
> 33 from your local Toyworld or hobby shop fixes that. 2 coats out of two
> small cans. Brushes nicely with 1/2" soft brush.
>
> Also no vent hole in the cover to let out hot air. Bad pup, no biscuit.
>
> Mike
>
>
>
> At 06:32 PM 28/04/2015, you wrote:
>
> You have a whole lot of fuses and switches there.? More fuses than
> instruments.
>
> Why so many?
>
> On Tue, Apr 28, 2015 at 6:57 AM, go_soaring <[email protected] >
> wrote: G'day all,?
> My apologies, forgot to mention that I run an LX Colibri II as my
> independent backup vario & nav source. I've flown a practice 400km flight
> with it prior to the Nationals this year, surprisingly worked really well
> as a vario. After all, Tobias Geiger almost won a world championships by
> flying with a Colibri II alone!!
> The only thing that would make me feel even better about my CNv, is to
> have Borgelts brilliant backup battery supply to his B instruments added to
> the CNv - I'm sure it's saved many Mike!
>
> Cheers, WPP
> P.s. My panel as it is now <2a115de.JPG>
>
>
> On 27 Apr 2015, at 18:11, Peter Champness <[email protected]> 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 <
> [email protected]> 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
>
>
>
>
>
>
>
>
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