Leviathan Blackbird Kit 1400-SDW375-75 - Modular Backtail

The Leviathan Blackbird 1400-SDW375-75 Kit is a high-aspect glider set designed for those seeking exceptional glide, unprecedented pumpability, and top-level performance in downwind, pumping, and prone surfing. The combination of the Leviathan 1400 Blackbird wing, the full carbon Blackbird fuselage, the SDW375 stabilizer, and the M75 Blackbird mast creates an extremely smooth, fast, and efficient system over long distances.

Each component is tuned to minimize drag and maximize the conversion of every pump into horizontal propulsion, transforming every downwind run into a continuous line of glide with very little added effort.

Key Strengths

• High-aspect glider set dedicated to downwind, pumping, SUP foil, and prone surfing.
• Exceptional glide with impressive ability to maintain speed between bumps.
• Top-level pumpability: designed for repeated long-distance pumping with less fatigue.
• Blackbird active-lift fuselage and SDW375 stabilizer for optimized trim and low drag.
• Blackbird 75 UMH W-Core mast for extreme stiffness and precise control in every situation.
• FC/M full carbon modular backtail for fine-tuning via positive and negative shims.

Who It's For

• Intermediate–advanced riders focused on downwind, pumping, dock-start, and performance prone surfing.
• Foiler who wants a fast, efficient, and stable glider to connect distant wakes and bumps.
• Those who want the ultimate in glide and efficiency rather than freestyle or aggressive jumps.

Components Included in the Kit

• Blackbird 75 UMH W-Core Mast – M75/BB.
• Leviathan Blackbird 1400 Front Wing – WL1400/BB.
• Full Carbon Blackbird Fuselage – Size M – FC/M.
• Downwind Stabilizer 375 – SDW/375.
• Carbon rail plate with titanium inserts – CP02K/Ti.
• Blackbird Glider Hardware Kit – MH171.
• Mast to Blackbird Hardware Kit – MH172.
• Carbon Plate to Rail Board Hardware Kit – MH160.
• Spare pins and shims for Q02K – MHQ02.
• Foam pad for plate – MH144.
• Negative shims for stabilizers – MHW060.
• Positive shims for stabilizers – MHW061.
• Allen keys, Torx keys, and grease – MH137.

Technical Specifications

Leviathan Blackbird 1400 Front Wing (WL1400/BB)

• Wingspan: 1380 mm.
• Surface Area: 1549 cm².
• Aspect Ratio (AR): 12.3.
• Maximum Chord: 173 mm.
• Maximum Profile Thickness: 18 mm.

SDW375 Stabilizer

• Wingspan: 375 mm.
• Surface Area: 130 cm².
• Aspect Ratio (AR): 10.4.
• Maximum Chord: 50 mm.
• Maximum Profile Thickness: 7.7 mm.

Fuselage, Mast, and Kit Weight

• Full carbon Blackbird fuselage – total length: 675 mm.
• Blackbird Mast – height: 750 mm.
• Board connection: carbon plate (rail mount).
• Approximate foil kit weight: approx. 4.5 kg.

Performance in Water

• Product line: Blackbird.
• Range: Leviathan.
• Recommended for: Freeride, Dock-Start, Pumping, SUP, Downwind.
• Take-off speed: 7 – 9 knots.
• Approximate top speed (80 kg rider): 16 – 18 knots.

Tech & Feel

Overcoming drag over long distances

The real limit in long downwind and pumping sessions isn't staying airborne, but fighting drag: the 1400 Blackbird is designed to glide, not just to support. The feeling is one of always "sailing" forward, with each pump adding horizontal speed instead of just being effort to stay clear of the water.

An ecosystem of synergistic performance

• WL1400/BB – Glide engine: very high AR and thin profile deliver frictionless glide and high cruising speeds with little input.
• Integrated Active-Lift Fuselage: the lifting section works in synergy with the wing, making dead-starts more consistent and take-off more explosive for such a technical glider.
• FC/M modular tail: "granitic" torsional stiffness eliminates flex, making the foil precise even under heavy load and intense pumping.
• SDW375 Stab: tuned for long downwind, it offers impeccable directional stability but leaves the foil free enough for high-frequency pumping.
• M75/BB: the ultra-high modulus carbon mast with W-Core provides a direct board-foil connection, maximizing energy transmission and feedback underfoot.

Frequently Asked Questions (Q&A)

What type of rider should choose the Leviathan Blackbird 1400-SDW375-75 Kit?

It's the ideal choice for intermediate–advanced riders who see foiling as long-distance downwind and pump, and want the ultimate in efficiency and glide, rather than jumps or freestyle.

Is it suitable as a first pump/downwind foil?

It can be used as a first downwind glider for riders already comfortable with foiling; its character is still relatively accessible compared to pure PROs, but it remains a high-performance kit, not an absolute entry-level one.

What is the difference compared to the 1300 Blackbird kit?

The 1400 offers more glide and lift at low speeds, making it more of a "pure glider" and a little easier over long distances; the 1300 is faster and geared towards high-frequency pumping with higher cruising speeds.

For what uses is this set less suitable?

It is not designed for aerial freestyle or large jumps: the structure is optimized for efficiency and glide; for tricks and big air, kits like Medusa, Balz Pro or Razor are more suitable.