I've seen a couple pictures of a radial 12 before, but no live action. I'm assuming it's some version of a Warner, but don't know the horsepower. It sounds cool, but doesn't exactly look like it's setting the world on fire.
How about a NO2 foot warmer bottle under the seat? Instant boost of power. A local experimenter had one on a Taylorcraft so he could take off and not sink into the lake when the wheels left the shore and hit the water. No story...saw it done.