WTB E-Vario

Hey Jim.

Mike eluded to a zero result less purchasing new.

The B700 looks super nice but I can't afford $800.00 even the B400 is suffice buy not much less.

Would you take $300

Have you considered an L-nav? It has a good climb-cruise audio and a single function distance computer. I'll sell you one for $175 and I pay the shipping!
JJ

Greetings JJ.

I am really after a Borgelt B400. I used an Lnav many moons ago (1990) and although a good unit at the time a little antiquated.

Thanks for the offer. That's a great price but the snow will be here soon!

I used an Lnav many moons ago (1990) and although a good unit at the time a little antiquated.

I'll echo JJ's comments about the LNAV. I bought mine in 1992 and it's worked great ever since, for most of that time coupled with an "antique" Compaq 1550 running Glide Navigator II. I'm currently exploring a flight computer upgrade using open source software (e.g, TopHat) and a cheap tablet. But based on input from several pilots whose opinions I trust, including several national champions, I've been reassured that any improvement in the new varios vis-a-vis the LNAV is modest, at best, and doesn't justify my investing the required price. I'll revisit if it looks like I need more of a data stream than can be provided by my current hardware (or if my fellow pilots are lying to me in order to hobble my performance!) but in the meantime, I'll continue to rely on the LNAV.

Chip Bearden
ASW 24 "JB"
U.S.A.

On Tuesday, September 29, 2015 at 12:15:04 AM UTC-4, wrote:
I used an Lnav many moons ago (1990) and although a good unit at the time a little antiquated.

I'll echo JJ's comments about the LNAV. I bought mine in 1992 and it's worked great ever since, for most of that time coupled with an "antique" Compaq 1550 running Glide Navigator II. I'm currently exploring a flight computer upgrade using open source software (e.g, TopHat) and a cheap tablet. But based on input from several pilots whose opinions I trust, including several national champions, I've been reassured that any improvement in the new varios vis-a-vis the LNAV is modest, at best, and doesn't justify my investing the required price. I'll revisit if it looks like I need more of a data stream than can be provided by my current hardware (or if my fellow pilots are lying to me in order to hobble my performance!) but in the meantime, I'll continue to rely on the LNAV.

Chip Bearden
ASW 24 "JB"
U.S.A.

It's very easy to install a top quality vario and drag it down to below LNav performance. Sharing a TE source with a mechanical vario (think of it as a big leak) is the most common problem I see. How much havoc this causes depends upon things we don't have good ways to measure (e.g. the impedance of the TE system).

Evan Ludeman (ClearNav guy)

If you split the total energy line, as far aft as possible, the cross-talk between varios is all but eliminated. I am running an SN-10 and B300 that share the TE signal that is split under the seat with 2 lines going forward.my varios are side by side and I see no cross-talking going on.
JJ

I suspect you're right, T8. Would that also apply to the LNAV itself? That might make me finally address the issue of sharing a triple probe TE with my Winter backup vario, which has been the case since the glider was new in 1992. The biggest sin, I imagine, is using a "T" connection immediately behind the instrument panel rather than a "Y" farther back in the fuselage. Question: would you expect both varios to benefit from this, or just my LNAV?

Chip Bearden
ASW 24 "JB"
U.S.A.

On Tuesday, September 29, 2015 at 9:26:58 AM UTC-4, JJ Sinclair wrote:
If you split the total energy line, as far aft as possible, the cross-talk between varios is all but eliminated. I am running an SN-10 and B300 that share the TE signal that is split under the seat with 2 lines going forward.my varios are side by side and I see no cross-talking going on.
JJ

That system ought to be fine. The SN-10 is a flow type vario (iirc), but probably small flask volume and flow compared to a Winter, etc. The B300 is a pressure transducer vario... but if it's anything like my B400, it's a pretty slow e-vario, so no real issue expected.

best,
Evan