They key is for H2 is left hand thread. AND even for safety the pressure it can take. that one looks good in both cases. NOW the one we have been using 30+ years of flights, been using H2 from first f

I remember the data that matched mine, was the actual flying flight. There was a small but very detectable spike just before burst. And when I did the tensile strength test it was the same way almost

I did have these numbers, But it was a long time ago. The numbers I got I did it by testing a piece of the envelope it's tensile strength, and doing the tons of math to learn what the pressure differe

It was a 1500 Kaymont balloon. Knowing the pressure differential is extremely low. When I tested the ping pong ball, I know it leaked badly. The texture of the ball just would not give a good seal. I

I did that once. But the ping pong ball surface is too textured and does not make a bubble tight seal. I did a silicone ball and o ring. Even that getting the right spring tension at these tiny tiny p

where do you think K7HAK is located Bill? I asked last night for anyones guess and no one had an answer. It may have gone right over me. after sundown so may have been even visible. Joe WB9SBD

anyone have a guess where k7hak really is? looks like last up date was almost 30 min ago. it may pass very close to me. Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme

Plus what kind of "Warmer" Most need O2 to operate, and of course where it's cold there is no O2 so just dead wasted weight. Joe WB9SBD

oops address https://newatlas.com/space/space-perspective-balloon-capsule/ Joe

Only cost ya 125K dollars. But i feel they lost a major cool part, they have the 2 hour trip up, float at 100K for 2 hours, then vent some from the balloon, and about 2 hours down and land in the ocea

Thats what I was wondering how the Government from orbit has perfectly neutral colors. Joe WB9SBD

I have yet to see a pic from say 60K and up from anyone's balloon, that you can say the image of the ground even when looking straight down is not color shifted way into the blue. it's almost like a B

Watching the news this morning they had a thing on how they are using orbital satellites to monitor the Covid-19. It was amazing imagery! I can understand Optics on getting the clear resolution. But h

DUH?! I shouldn't be reading charts at like 3 AM. UG! Thanks to all who answered my BrainFart! Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com

I am very confused on a battery pack. Say you have a pack that can run 1 amp of current draw for 10 hours. One would think that if you only drew 0.5 amps that it should run for 20 hours or close to it

I was just wondering what the tensile strength on the average actually was. So then even when fully inflated how much pressure it could actually generate before failing. I had all the formulas for pre

Finally, Some evidence, But not totally also. I wonder how must is lost when the latex is NOT stressed? Like stretched ONLY to 50% elongation. We have tension tested many many samples of latex, and it

I have been doing this for over 30 years, And I have heard people make these statements probably a thousand times, but I have yet so see some actual real evidence of it. Joe WB9SBD

Thank You, If my up coming flights are successful I will be putting this to a rest. once and for all how long they last. But not quite ready yet. Joe WB9SBD

That did NOT answer either of my questions. Joe WB9SBD