Actually, we're not the only one who thought about it. Since the 2000's some researchers or blimp enthusiasts launched research project like this. We're trying

Actually, we're not the only one who thought about it. Since the 2000's some researchers or blimp enthusiasts launched research project like this. We're trying to apply it to a strong pain point in the energy industry. Concerning the tradeoffs. It does increase leak potential but the materials and glues are in constant improvements. And, we do not need to oversize the envelope this much because the airship is extremely energy efficient and consume very little energy (during all our flight test we are always amazed when we have 80% left of battery or H2 at the end of the flights). But yes, for now, we keep fuel and lighter than air gas separated and we will keep this possibility for a long time. Thank you for the feedback!