so I guess it belongs here. here’s a couple of GoPro videos of my radio control hydroplanes. the first is a 26cc (0.026 liter) single-cylinder gas two-stroke in a “Shovel-nose” hydroplane. the second is an 11cc (0.011 liter) single cylinder nitro two-stroke in a “pickle fork” hydroplane.

here’s a pic of the two boats together: