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#1
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TE vario
Hi,
I am looking for a vario which take TE from pitot and static pressure, like the Westerboer, to go with my LX 5000 which has electronic TE. Gilles |
#2
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I'm a little bit confused. If you are using pitot and static in a
vario then you need electronic compentation. If you use reverse-pitot (total energy probe) you need no compensation. I think you are talking about wanted a vario that uses a total energy probe. In fact, the LX5000 will use the total energy probe. You just need set compensation to zero. If you want another vario to go along with the LX5000, consider B40 if you want an electronic vario, or a Sage or Winter if you want a mechanical one. The nice part about the B40 is you dont need a capacity bottle. Kevin On 2 Jun 2004 09:04:15 -0700, (G.A. Seguin) wrote: Hi, I am looking for a vario which take TE from pitot and static pressure, like the Westerboer, to go with my LX 5000 which has electronic TE. Gilles |
#3
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#4
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As far as I recall, the Bohli varios use this compensation principle, and
they have quite a good reputation. -- Bert Willing ASW20 "TW" "Todd Pattist" a écrit dans le message de ... Kevin Christner wrote: I'm a little bit confused. If you are using pitot and static in a vario then you need electronic compentation. If you use reverse-pitot (total energy probe) you need no compensation. I think you are talking about wanted a vario that uses a total energy probe. No, there are older TE designs using a diaphragm between the pitot and capacity at static pressure. As you slow, the diaphragm flexes less and the volume of the capacity increases. It's designed to flex just enough to compensate for the expansion of the air due to your stick thermal so no air flows out the vario due to your climb even though you have no TE tube, and your vario is hooked to static. They never had a great reputation, and I'm not aware of any varios that had this feature built in, but it could have been. I suspect any diaphragm compensators still around will need some tender loving care to resurrect to usefulness as the diaphragms were kind of finicky and aged quickly. Todd Pattist - "WH" Ventus C (Remove DONTSPAMME from address to email reply.) |
#5
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Todd
The Bohli is a very sensitive total energy taught band variometer. Todays replacement value is around 2100 Euro ( see http://www.bohli-magnete.ch/pdf/4ins-ve.pdf ) I suspect that you have it connected incorrectly! Anyone out there have a manual for the Bohli vario for Todd? Ian "Todd Pattist" wrote in message news "Bert Willing" wrote: As far as I recall, the Bohli varios use this compensation principle, and they have quite a good reputation. I have a Bohli vario and mine shows no sign of using such compensation. It came attached to my TE, where it worked well, but it interfered with my internal capacity Ilec and I took it off the TE and put it on the static where it's subject to stick thermals, but serves as a backup. Todd Pattist - "WH" Ventus C (Remove DONTSPAMME from address to email reply.) |
#6
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Oops sorry thats 2100 swiss francs I think but that's still US$ 1600
Ian "tango4" wrote in message ... Todd The Bohli is a very sensitive total energy taught band variometer. Todays replacement value is around 2100 Euro ( see http://www.bohli-magnete.ch/pdf/4ins-ve.pdf ) I suspect that you have it connected incorrectly! Anyone out there have a manual for the Bohli vario for Todd? Ian "Todd Pattist" wrote in message news "Bert Willing" wrote: As far as I recall, the Bohli varios use this compensation principle, and they have quite a good reputation. I have a Bohli vario and mine shows no sign of using such compensation. It came attached to my TE, where it worked well, but it interfered with my internal capacity Ilec and I took it off the TE and put it on the static where it's subject to stick thermals, but serves as a backup. Todd Pattist - "WH" Ventus C (Remove DONTSPAMME from address to email reply.) |
#7
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#9
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Yes the -1 is a mechanical vario. There is a compensator diaphragm in that
bulge on the back of those varios. I believe that is the TE compensation. I think that the knob changes the amount of compensation. I had one in my old LS-1 and it was a beautifully sensitive vario but I didn't have a manual for it then either so I'm unsure of the connections for it. Ian "Todd Pattist" wrote in message ... "tango4" wrote: The Bohli is a very sensitive total energy taught band variometer. Todays replacement value is around 2100 Euro ( see http://www.bohli-magnete.ch/pdf/4ins-ve.pdf ) I suspect that you have it connected incorrectly! Anyone out there have a manual for the Bohli vario for Todd? Your interesting link leads me to suspect I have the 68-PVF-2 which is only 830 Euros, rather than the 68-PVF-1 at 2100 Euros. The -1 says it's TE, the -2 doesn't specify, but looks more like mine (except for the M-ring) and the price implies it's a more basic instrument. Moreover, I would have it inadvertently connected *correctly*, not incorrectly, since I had to remove it from the TE probe it was originally on. Either way, it definitely has stick thermals, but it's interesting to know there's a fancier TE version. Does the -1 version operate mechanically? It seems to have a knob of some type on it. Todd Pattist - "WH" Ventus C (Remove DONTSPAMME from address to email reply.) |
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