Airboat plans & patterns plus one extra set: order this if you want an extra set of plans & patterns included (only 1/2 price for the extra set). Last reviewed: 21 dec 2014 last updated: 21 dec 2014 first published: 31 dec 1999 permanence not guaranteed. How fast does it go? for estimating the speed for small outboard planing boats see planing speed boat chart. this chart should be used for general estimates only..