further development Hi all of you behind my screen! Many thanks for the 3500+ views!!! I'll keep on posting the latest events and developments. Since fuel (any fuel) gets rare and expensive, if not now, in near future; our air-engine is bound to become of interest! Latest development towards industrialisation is our 12 KW - flat twin at barely 15 KGS. The generator set developed from there will not exceed 25 KGS for 10 KVA. Anyone better than this gets a bottle of bubbles (to collect in South of France!). Consumption in bi-energy mode will not exceed 1 liter (yes, ONE liter) per hour of any fuel fossil of bio! Test bench in august, proto in sept-oct; that's the plan.