A pilot (a top national competitor) told me that he uses the EDS system
because "I turn on my oxygen at the beginning of the flight and don't think
about it again".

Now that really has merit, not to need to be checking a flow meter and
fiddling with the needle valve (or forgetting to).

That said, I am still using the Nelson system, mostly because I can't seem
to talk myself into purchasing something that looks like a $5 transistor
radio for, what, $800+? It even has the transistor radio 9v battery!
Although I have heard nothing but good reports about the EDS, it still looks
cheap to me...
-Bob Korves

"Bill Daniels" wrote in message
...

"David R." wrote in message
...
Yep, we had this discussion just the other day and I was starting to
think
that I was going to change from my constant flow system to the EDS.

This thread has caused me to decide to keep my current system.

Oxygen is relatively cheap at my field, my bottle is good sized and the
whole battery issue is a non-starter.

Thanks to all for all of your infomation, you saved me several hundred
dollars.

dave r.

I have the same situation. O2 is cheap but refills take time and I have
to
do it for each flight. My old system used a demand mask that was
uncomfortable and it depleted the 22 Cu. Ft. bottle in about 4 hours.
After
a season, that got old.

The EDS system is simplicity in action. Just put the cannulla on with the
control unit set to start O2 flow at 10k feet and go fly. The O2 supply
will last 34 hours at 18K feet which means that a refill maybe twice a
season. Convenience wise, there's no comparison.

There's also good data that says the pulse demand will get the O2 deeper
into the lungs for better blood O2 saturation. The EDS D1 system is
expensive but it's a damn good system for gliders.

Bill Daniels