Today we made a flying model of the battle bus from fortnite! It ended up being more of a blimp rather than a hot air balloon but propane regulators at that size would be hard to find, nevermind...
There was a stiff breeze today at the field and a lot of thermal turbulence so I thought I`d see how well the little DIY Sub-250 gram FPV model I built from foamboard would handle the conditions