Might be good for me as I often work near 10000 feet, the spec
limit for these drives to function without errors.
Altitude. Do a forum search on "river bag altimeter".
Yes, I've done that awhile back The bag is an interesting idea but
I wonder how pressing my knee down on the bag to increase air
pressure would work in practice while balancing the unit on a rock
on a narrow trail for 4-8 minutes. Nice if a tiny bicycle pump
could attach...
If I do my math correctly, 5000ft elevation, which I never go
below- the air pressure is 86% of sea level. At 10000 ft, the
drives spec limit, air pressure is about 71% sealevel. The highest
I would ever go, 12000 ft is only 66% of sea level.
I'd have to press hard enough and consistantly enough to raise that
66% to 86% up towards sea level 100%. I'd have to compress the
volume of the bag up to 1/3rd. if I understand the physics right. I
might be able to do this, I just have never tried it.
So any thoughts on folks who have real world use of the bag
appreciated.
Electronics
have gotten VERY reliable in recent years and the chance of
failure is vrey slim. In most cases if the unit doesn't fail in
its first 30 days it probably will not fail.
Yes, but I have the added variable that probably at least 95% of
people using these things do not have- high altitudes approaching
and even exceeding manufscter's spec limit for drive altitude
(Operational). If I didn't live in the Rockies but say near a
seaboard it wouldn't be an issue at all. I can't use microdrives
for example since they are rated for only 9000 feet. And I need
enough CF cards to see me through any part of the trail I'm on
above 10000 feet since I can't turn the PHD on...unless the bag
trick is practical.
I have heard of sucessful use of these things in Peru with bags but
I'd like to learn more.
Thank you for your resonses, they are most helpful.
Jim H.
