Low Earth orbit requires at minimum ~6.5km/s, so launching from the equator into the right stratospheric wind could allow a 10kg launch into orbit from a balloon if it can accelerate from Earth's natural rotation plus the wind speed, totaling around 500m/s, to 6500m/s. [2]
Traditional small rockets seem to have a lower limit in the 100s of kg total mass.
Using a solid microrocket(s) [3], you might be able to get a payload into orbit between 10-500 grams. I know MIT was working on this as well as micro-jet engines... [4]
Except, they are not flying bombs. Notably, the only people killed when the Hindenberg blew were on board. And, fewer than half of them. The flames in the film were the (very flammable!) gas bag itself and the kerosene fuel. The escaping gas went up and away.
A modern craft would not be made of readily flammable material.
Flying bombs that are being controlled remotely. And we know there’s no possible way that a hacking or ransomware group could exploit that channel and fly it into a couple of towers, right? Inconceivable!!
Fly-by-wire control of passenger airplanes hitting the World Trade Center was the plot of the 2001 series The Lone Gunmen[1]. Yes, that was 6 months before 9/11.
NASA has calculations of hydrogen balloons up to 90km, carrying a 10kg object. [0]
Wind at that altitude can be as much as ~50 m/s, and occasionally even travel from west to east (important for orbital launching). [1] http://www.ccpo.odu.edu/SEES/ozone/class/Chap_2/2_4.htm
Low Earth orbit requires at minimum ~6.5km/s, so launching from the equator into the right stratospheric wind could allow a 10kg launch into orbit from a balloon if it can accelerate from Earth's natural rotation plus the wind speed, totaling around 500m/s, to 6500m/s. [2]
Traditional small rockets seem to have a lower limit in the 100s of kg total mass. Using a solid microrocket(s) [3], you might be able to get a payload into orbit between 10-500 grams. I know MIT was working on this as well as micro-jet engines... [4]
[0] https://www.grc.nasa.gov/WWW/K-12/Numbers/Math/Mathematical_...
[1] http://www.ccpo.odu.edu/SEES/ozone/class/Chap_2/2_4.htm
[2] https://en.wikipedia.org/wiki/Orbital_speed
[3] https://www-bsac.eecs.berkeley.edu/projects/microrockets/mas...
[4] https://www.semanticscholar.org/paper/Performance-of-a-High-...