Barographs?

AS wrote on 10/24/2020 4:51 PM:
On Saturday, October 24, 2020 at 11:48:09 AM UTC-4, Eric Greenwell wrote:
Jim S wrote on 10/24/2020 8:02 AM:
I was mainly interested in the mechanical, smoke type. Was not interested in one for competition but mainly to use for historical interests.
I’m not a collector necessarily in aviation items but I do have two aviation sextants (A-10) and a drift meter. Although I don’t shoot stars, the sun and the moon from the cockpit, I have spent a fair amount of time shooting the sun in my backyard.
Wanting a workable barograph is in line with these interests.

The Replogle is a mechanical, wind-up barograph that can use smoked foil, but the pressure
sensitive chart paper was much easier to use. I did use smoked foil a few times on a ???
barograph, but it was messy to smoke the foil, and misting some lacquer on it after the flight
was tricky - so easy to smudge the smoke on the foil and lose the trace. So, smoked foil to GPS
traces - I prefer the GPS traces for flying, but the Replogle is prominent on my "shelf museum".

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1

.... but it was messy to smoke the foil
And I bet you it was/is pretty unhealthy to do so as well! I hope you did that in the confines of you own home with no impressionable youngsters around. ;-)

Uli
'AS'

Smoking generally occurred in the back of my trailer, which was probably a bit unhealthy, what
with all the black smoke particles floating around. Pretty sure coming out of the trailer
hacking and coughing made any impressionables think they'd stick to skateboards :^)

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1