On Tue, 02 Sep 2008 02:04:19 -0700, Ian wrote:

On 31 Aug, 14:24, Steve Leonard wrote:
At 17:13 29 August 2008, Ian wrote:

Folks,

I'm after a cheap audio vario for the Pirat, to replace a CAVII.
Requirements are (a) cheap (b) 80mm (c) cheap (d) working (e) cheap.

Anyone?

Ian

If you really liked your CAV II, maybe you can just get a replacement?

http://cgi.ebay.com/ebaymotors/Cambr...VSI-Model-CAV-
II-...

Thanks. I've just checked, and I was wrong - I have a CAV50. Which is so
old that it's the electronic equivalent of a Cosim. I did think of
trying to find another, but was told that it's simply age which is doing
for mine ... would the CAVII be any better?

We (CGC) had a Cambridge M-nav Mk 4 in our Pegase at one time. I flew
that a lot and found it an acceptable vario. It has switchable range (+/-
5, 10, 20 kts) and three switchable response rates. No averager - for
that you need to add the CMP 150 Mk 4 flight director.

My Libelle came with a CVS50 vario. Is this the same as the CAV50? - mine
was fixed +/- 10 kts with an external switch as its only control. It also
had a CMP150 Mk4 flight director installed, which added an averager and
electronic speed-to-fly. The backup was a PZL mechanical vario. I
replaced them all with an SDI C4 and a B.40 before I flew it. I already
had the C4 and like it a lot. The PZL had to go in favour of the B.40 to
avoid mixing capacity and pressure sensing instruments on the same TE
probe.

I think the M-nav is a bit more recent than your CAV50. As its an 80mm
instrument, it may be worth grabbing one if you see it.


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