Hello everyone,
I’m about to order MICHOBBY’s integrated foil-assist kit, but my main intended use is continuous low-mounted eFoiling. I may occasionally try it high-mounted as foil assist, but that is secondary.
My setup
i am a wing foiler
- Board: RRD Air Beluga Y30 inflatable, 140L, about 8.8kg
- Mast: RRD aluminum, 85cm
- Front wing: RRD Blaze 1850cm²
- Hand wing: RRD Evo 5.5m
- Rider: about 85kg
- Intended location: Hudson River / flat water
Kit and quoted price
MICHOBBY integrated system:
https://michobby.com/products/efoil-diy-foil-assist-kit
- Kit delivered to New Jersey with shipping/tax: $2,080
- Extra plug-and-play battery: $320
- Extra plastic propeller: $69
- Standard kit includes aluminum propeller
- Planned total: about $2,469
Manufacturer specifications/claims
- Complete installed weight: 4.95kg including battery
- Battery: 12S2P Samsung 50S
- 43.2–44.4V nominal / 50.4V full
- 10Ah / approximately 432–444Wh
- Battery weight: approximately 2.5kg
- BMS: 120A continuous / 350A peak
- IP68 removable battery enclosure
- Plug-and-play user-swappable battery
- Bluetooth BMS monitoring
- Wireless waterproof remote with battery display
- Signal-loss delay can be set to zero
- Claimed maximum thrust: approximately 35kg
- Claimed charge time: 1.5–2 hours
- Total system runtime advertised as 40 minutes to four hours for intermittent assist use
MICHOBBY has told me directly that the kit is designed for foil assist. For a low motor position and continuous eFoil use, they estimate only 10–20 minutes per battery.
Planned configuration
I want to mount the motor low, roughly 10–15cm above the fuselage, so it remains submerged continuously. With two batteries, I’m expecting two separate 10–20-minute sessions with a shore-side battery swap.
I’ll initially use the extra plastic propeller, then test the supplied aluminum propeller once the mount and cutoff behavior are proven.
Questions
- Is 35kg of claimed thrust enough to reliably lift an 85kg rider on this 140L inflatable and 1850 wing?
- Has anyone run this exact kit continuously with the motor mounted low?
- Is 10–20 minutes from approximately 432Wh realistic?
- What motor, ESC or battery temperatures should make me stop?
- How much additional drag should I expect from the low-mounted motor and external cable?
- Would a 105–120L rigid board materially improve takeoff or runtime?
- Any concerns with the sandwich battery/controller plate on an inflatable board?
- Has anyone fitted the universal clamp to an RRD aluminum mast?
- Is $2,469 with two batteries and both propellers reasonable compared with Foil Drive?
- What telemetry should I log during testing?
I plan to document actual installed weight, takeoff speed, current draw, battery sag, temperatures and continuous runtime to share with everyone. Thank you for your help, this is my first post and experience into efoiling