Balloon-Info

High Altitude Balloon Calculators and Info.

Float Calculations.

Original 'float1g' calc here: https://ukhas.org.uk/doku.php?id=projects:splat

Pico group balloon data here: https://groups.io/g/picoballoon/table?id=38275

Balloon	Volume	Empty Weight	Max Free Lift[1]	Stretch	Flights	Purchase[2]
Qualtex Silver 36" (2016 & 2018-08)	120ltrs	37g	2.5g
Qualtex Silver 36" (2017-04)	120ltrs	33g	2.5g		Rarely achieved float
Chinese Clear 36"		38g	7g			Aliexpress
Grabo Silver 36"	145ltrs	44.5g	2.5g
Yoko 32" Old	240 to 270ltrs	41g	8g
Yoko 32" New[3]	240 to 270ltrs	48.6g	8g	Stretch to 100" circumference	7g payload - 13.5km 28g payload - 10.3KM+ 40g payload - 10km	Yokohama
Sag Silver / Orbz 35"	240 ltrs	46g	5g

[1] Maximum sensible value, would suggest 10% lower for safety

[2] Or from the UK http://www.randomengineering.co.uk/Random_Aerospace/Balloons.html

[3] Cheaper way to ship Yoko here: https://traquito.github.io/faq/balloons/buying/

Burst Calculations.

https://sondehub.org/calc/

http://www.randomengineering.co.uk/Random_Aerospace/Balloons.html

Original 'burst1a' calc here: https://github.com/ukhas/cusf-burst-calc

Original 'burst3' calc and lots of balloon data here: https://ukhas.org.uk/doku.php?id=guides:balloon_data