Foil Assist Compatibility Chart
Already own a foil? Use this chart to find exactly what you need to run the Duotone Foil Assist or Foil Cruise with it. Not sure what you have? Email yaz@calikites.com with a photo of your mast and fuselage and we'll tell you.
1. Pick your eMast
| eMast | Length / build | Works with |
|---|---|---|
| Foil Assist AL | 84 cm aluminum, motor 17 cm below the top plate | Duotone and 10 other foil brands with the right fuselage adapter |
| Foil Assist D/LAB | 84 cm carbon, lightest and slimmest in the range | Duotone 3BS foils directly, plus Armstrong with the Duotone eFuselage. Not compatible with the other brand adapters. |
| Foil Cruise AL | 80 cm aluminum, motor 15 cm above the fuselage, optional prop guard | Same adapter options as the Assist AL |
2. Find your foil brand
| Your foil | With Assist AL or Cruise AL | With Assist D/LAB |
|---|---|---|
| Duotone (3BS fuselages: Aero AL 3BS, Tail D/LAB, Monobloc Tail) | Adapter Fuselage – Duotone ($99) | Direct fit, no adapter |
| Armstrong (A+ System wings) | eFuselage – Armstrong ($299) plus Adapter Fuselage – Duotone ($99) | eFuselage – Armstrong ($299) |
| Axis | Adapter Fuselage – Axis ($149) | Not compatible |
| F-One | Adapter Fuselage – F-One ($149) | Not compatible |
| Gong | Adapter Fuselage – Gong ($149) | Not compatible |
| Lift | Adapter Fuselage – Lift ($149) | Not compatible |
| Code | Adapter Fuselage – Code ($149) | Not compatible |
| North | Adapter Fuselage – North ($199) | Not compatible |
| Sab | Adapter Fuselage – Sab ($199) | Not compatible |
| AFS | Adapter Fuselage – AFS ($199) | Not compatible |
| KT | Adapter Fuselage – KT ($199) | Not compatible |
Important: no Foil Assist or Cruise set includes a fuselage adapter. Order the one for your foil along with your set. Duotone notes that manufacturing tolerances can cause slight variation in adapter fit, and optional shims are available.
3. Check your board
- Any prone, wing or mid-length board with standard US foil tracks works. The eMast mounts like a regular mast.
- Duotone recommends a board of at least 35 L for good battery performance.
- Boards built for it: Midfish, Midfish Air (inflatable, great with the Cruise mast), Paradox SLS and Crush SLS (4'5" / 35 L), which has integrated cable routing. Shop all Foil Assist boards.
4. Check your front wing
- Duotone recommends a front wing of at least 900 cm² for good battery performance.
- With the AL masts, Duotone recommends the Crest D/LAB, Glide 2.0 D/LAB, Glide 2.0 SLS and Free SLS front wings, with the Aero AL 3BS or Tail D/LAB fuselage and an S, H or C stabilizer.
- With the D/LAB mast, Duotone recommends the Crest D/LAB or Glide 2.0 D/LAB, with the Monobloc Tail PX D/LAB, Monobloc Tail S D/LAB or Aero Tail D/LAB fuselage.
More detail on choosing wings and stabilizers is in our first Foil Assist setup guide.
5. Batteries and travel
- Every set runs on two LiHV batteries (7 Ah, 22.8 V, 159.6 Wh each, about 1 kg each), worn on the eHarness.
- At 159.6 Wh, each battery is just under the common 160 Wh airline limit. Rules vary by airline, so get approval before you fly.
- For the Cruise setup on a Midfish Air, the Cruise battery box mounting set moves the batteries onto the board instead of the harness.
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