Mark Jessop's wonderful 2022 slide presentation uploaded to the files here: https://groups.io/g/GPSL/files/GPSL%202022%20Technical%20Sessions Slides augment the youtube videos and allow for zooming

The Gene Swiech presentation camera radio sonde only went for half his presentation. Any chance the rest is avail?

12 GPSL videos are available on YouTube. Search for GPSL Live 73 Mike. N0MPM

Hi Mike, We fly a baro as a backup for the GPS. We use a MS5611 because it is rated to 11 mbar, or around 100K'. It's been quite a while, but if I remember right, there were 2-3 calculations based on

Gang, All of the Great Plains Superlaunch session videos for 2022 are available on youtube (easily found by searching "Great Plains Superlaunch").   Thanks to Jim Emmert / WB0URW for taking care of

The impetus for making these available is that neither hide nor hare of the videos of any of the technical sessions has been seen, even after two whole months have come and

Coming at this from a high powered rocketry perspective, GPS is going to be a lot more accurate than barometric pressure. Depending on the particular device you're using, it might be hard to get any

Gang, I haven't tried in a while, but does anyone use pressure sensors with much success in HABs?  The reason I ask is that I have a pile of BMPxxx sensors and it would be no big deal to add them to

Another one gone! These remain:

Alright, two are spoken for... here's what remains. Domains are free to a good home, housebroken, and are up to date on their shots.

As the picoballooners have found - gas loss through diffusion on the ground is completely different in floating flight. A foil balloon might loose 1g of lift (out of the 10g or so it was

A 200 gram cloudbuster filled to 200 grams of positive lift isn't much stretch for that size balloon, but that's still really useful info -- thanks!

Although we did not take the time to do repeated trials, earlier this summer we filled a 200 gram Cloudbuster with helium indoors and set it for an initial 200 grams of positive lift. 24 hours later

? https://www.hi-float.com/ Steve On 22/09/2022 21:53, Joe WB9SBD wrote: Virus-free.www.avg.com

If I remember correctly Hi Float is just HE and air , nothing special. so the HE will still escape just as fast and left with an envelope filled with air. Joe WB9SBD

Hi Steve, thanks for the information! That's an interesting suggestion about Hifloat -- it looks like it could make a significant difference.

I don't think Kaymont sell any chroroprene balloons (Totex KA and TX series are both latex I think). For long duration Chloroprene would be better for UV degradation (and I think helium

Hey everybody, We're interested in some extended flights (several days) using simple latex (chloroprene?) balloons such as the ones from Kaymont. We have a ballast/gas release system that we're

Hey guys, I have a bunch of domain names that I bought back in 2009 when I thought I'd be more active in the hobby, and I'm tired of hemorrhaging money on them. Any interest? No charge, unless

Looks familiar. Just another toy to distract me and take my money. But I can chase and recover payloads while letting someone else pay to send them up! I’m about 50km downwind of an upper air