Freebie drawing of a KEP's FE-4S P-Open 4-cell LiPo Brushless in-runner Outrigger Electric Hydroplane.
Note, the KEP's FE-4S is a P-Open 4 cell LiPo outrigger. The boat can be fitted with brushless in-runner marine motors with physical dimensions of 36 or 40 mm diameter that are 65-74 mm long (note, it's physically possible to actually use motors up to 80 mm long but at those lengths it gets more difficult to make a nice cowling and the clearence towards the rear sponson tube is less "wrench friendly").
There is also an slightly smaller freebie version available for the P-Limited class they run in the US (with Aquacraft 3650-2030KV motors). That boat is called KEP's FE-4SL - click HERE for info and download of that. But if you just want to build one of these I recommend building this one as it also works with the smaller P-Limited Aquacraft motor.
- Made for 36x65-74 mm and 40x65-74 mm motors
- Tub Length: 689 mm (27.126")
- Total Length, from transom to sponson tips: 754 mm (29.69")
- Tub Width: 84 mm (3.31")
- Tub Height: 51 mm (2")
- After Plane: 537 mm (21.14")
- Sponson Length: 442 mm (17.4")
- Sponson Width: 23 mm (.09")
- Sponson Ride-Pad Width: 30 mm (1.18")
- Sponson AoA: 3.9°
- Ski Width: 30 mm (1.18")
- Ski AoA: 1.4°
HERE. The PDF size is A1 = 841x594 mm. This one includes some extra info, extra measurements and some set-up tips etc.
Click HERE if you want to CNC cut it. It's a zipp file of the tub sides, sponson sides, ski sides, ski run-pads and all the bulkheads.