Originally Posted by
VinRouge
point is, not enough for widespread commercialisation, mindful of other uses.
Military applications i guess yes, but if you are expecting commercial flights under 2 hours as is oft sold as part of the marketing hype, forget it.
The helium loop is a closed cycle, it's not going to be a consumable. Compared with the quantity required for single-use applications - party balloons, weather balloons, blimps etc, it seems like a fairly modest proposition.