Selph-Inflicted R/C Airboats

Does anyone have an active project they are building? If so, let's see it.

Was going through a forum over at RC Universe and ran across an old pic. A fellow airboater, Mike had this project. He had twin OS46FX on board. It was ready to test. But due to an illness, we never got to see it in action.

I was curious as to its performance.

I was contracted by Phillips 66 to build an electric boat for them to run geese off of a pond at one of their fields in Texas. I did have to meet their safety precautions regarding the prop. They wanted their personal safe during handling and operation of the vessel. As well as the geese they would be spooking.

The hull is 48" long and 20" wide on the bottom and weighed 12 pounds 12 ounces without the battery pack.

Motor: Brushless Emax GT4030 500KV Outrunner.
ESC: Castle Creations Phoenix ICE 100.
Battery:18.5v 4200mah 35C battery pack.
Prop: 16x8E.

All plans are 25% off! Sale ends 05.31.26.

60 Series 3-point Hydro Radio-controlled Airboat Plans – Baltic Birch Hobby Build (digital Download) - Etsy This Building & Construction item is sold by SelphCreations. Ships from United States. Listed on Apr 6, 2026

Kurt, in a covert operation, unbeknownst to anyone, even me... transformed a SI3 60 Series. From an air prop to a water prop. And the performance was jaw dropping. Here are a few pics of his conversion. Maybe Kurt will post the videos of it in action.

Kurt's "Overbite" 1/4 scale with a stock Zenoah G26 taking a few laps around the pond. In this video you will see that the SI3 boats turn well in both directions. Due to the rotation of the prop, it will turn counterclockwise a bit better than clockwise.

crispyspa 4 likes, 3 comments. "3 Point Hydro "Overbite" under "Legal" control."

Here is Kurt pushing the 1/4 scale converted to electric to hit 70mph. He comes very close with this run.

crispyspa 4 likes, 3 comments. "Trying for 70mph again"

Who here runs water propped boats?

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