https://www.youtube.com/watch?v=Np0wqLKK0R

https://www.reddit.com/r/interestingasfuck/comments/ug0tgf/a_boeing_737_encounters_an_amateur_stratospheric/?utm_medium=android_app&utm_source=share Good job its not one of ours. Steve G8KHW -- This e

Sorry about the document links - I have copied them to my google drive: https://drive.google.com/drive/folders/1z4fyjkkTzor6WV2eEQOvGhokyEn4-_IR?usp=sharing Steve

Checking through rubber chemical compatibility charts (see below) I found: Natural Rubber scores 1 (satisfactory) against ammonia Gas - but a 4 (Unsatisfactory) against Ammonia Liquid. Chloroprene sco

Don't know about Totex - but KKS (Japan) used to do a range of Chloroprene meteorological balloons. I think most true met balloons are now natural latex for environmental reasons - plus whenever I hav

Dennis - how about Chloroprene (Neoprene)? plenty of those about. Steve Virus-free. www.avg.com

Apologies - it looks like I tested Butane (not Isobutane) permeating through a latex balloon - although I suspect the results will be the same. Steve

Very interesting Joe - I'm glad you tried it. I doubt that there is any great difference in the TX balloons (vs TA or HY) that would cause Ammonia to permeate more readily - I suspect this is just a f

The TX range are designed for lower temperatures (than the standard TA range) - but they are still primarily a Latex balloon - just a different set of additives gives the their low temperature qualiti

A Japanese TV company (One by One) have approached me** to help get permission to show the Habitat tracker screens on a TV program. I can't see a problem with the screens per-se (other than the usual

Oh no Andy VK3YT (VK3 = Victoria) practically invented HF pico ballooning - hope he can find a way to continue. Steve G8KHW / AJ4XE Virus-free. www.avg.com

What do you US guys call that style of launch - I've heard "hail mary" in the past - is that it? Not sure why? I guess that's a running hail mary? Steve G8KHW

My rule is never launch in winds faster than you can run. Since age is catching up with me Ive been experimenting with de-reelers (with some success). Steve Virus-free. www.avg.com

Hi Joe - Assuming this is not a trick question (if a balloon is neutrally buoyant it won't ascend - so won't ever burst). Assuming you mean if something else was pulling it up: The 100g Kaymont (KCI-1

You can get a good estimate of the purity of a gas by calculating the lift per unit volume. The typical "balloon helium" we get here in the UK is about 95-97% pure (the remaining 3 - 5% assumed to be

The latter (rapid ascent and gas release at the desired altitude) . Another idea in the paper is a lift balloon - where the superpressure balloon is filled to just the correct amount on the ground and

Looks like that link does not work - search for the paper "Characteristics and Performance of Three Low-Cost Superpressure Balloon (Tetroon) Systems " Steve

See the ping-pong valve described here: https://tinyurl.com/y5ukveyb see fig 4 Steve Virus-free. www.avg.com

Actually that does look more like the problem. Steve Virus-free. www.avg.com

Hi Zack - Ive not tried (or even seen) that particular pi camera before but I see its based on the 5Mp OmniVision OV5647 sensor - that was the sensor used by the original pi v1 camera. Raspberry pi re