Hi guys,
I’ve just finished building a sniper rifle case board based on the design by @superlefax and @kotnascher design in this thread: [Surf n' Destroy] Building a flying sniper rifle case
First of all I must say that I am very thankfull for all the information provided earlier. I made some modifications to customize the design, that I would like to share.
Basic info:
Board: Nuprol X-Large Hard Case Waffenkoffer
ESC: FSESC7200
Motor: Flipsky 65161
Remote: Flipsky VX3
Mast and foil: Gong Allvator V2 X-over
Batteries: Powerworks 60V6AH
My modifications:
- Extended the 3 mm aluminum framwork to also support the lid and added lasercut reinforcement brackets to simplify the build. This was all manufactured by the company Laserboost in Spain to a very reasonable cost. You just send in 3D solid STEP files and back comes cut + bent parts. They ship to Sweden. https://www.laserboost.com/
- Used 4 standard Powerworks 60V6AH tool batteries from Bauhaus with custom 3D-printed connectors placed in waterproof IKEA food boxes. I opened one of these batteries and there are 15S2P quality Sony Murata VTC6 cells inside.
https://www.bauhaus.se/batteri-powerworks-p60b6-60v-6ah
Unfortunately it seems Bauhaus are removing this battery from their shelves now. - Added water cooling with modifyed nose cone and this self priming pump: 12V 180L / H vattenpump med fäste - Opencircuit
That pump had just the right suction power to bring water up through the mast and through the Flipsky heatsink by itself, with a decent flow. Still fitting inside the control box. - Added custom propeller duct with 180 mm computer fan grill as additional foot protection.
CAD files are here: Onshape
BOM here: eFoil - Google Sheets
I had some doubts on the first testride that this board would be hard to get flying, but by setting the VESC to max current 200A and abs max current to 300A it just pops out of the water like a dolphin with full throttle. My weight is 75 kg.