Sunday, February 21, 2016

KEP's FE-4S (P-Open) Freebie




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.


Specs:
  • 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°

Main drawing of the KEP's FE-4S (1of2). Download it HERE. The PDF size is A1 = 841x594 mm. When you have had this printed out in 100% size you will cut the lower part away to make the actual templates etc.

Complementary drawing of the KEP's FE-4S (2of2). Download it 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.

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