Can it climb from sea level to 10k feet, or is 10k feet its service ceiling? Given 10 minutes endurance in hover, i cant see it climbing at 1000fpm vertically for 10 minutes, and even if it managed that, it would be a free fall back down. Very cool, but i dont think i'd ever get on one without a set of wings retrofitted to it. Was just browsing the flying RV thread, and i thought of another one... a scale bombardier/canadair cl415... big enough for 4? I'd still paint it yellow and red though.