KIN UltraFlap - Ultra Light Version - AeroScout Specific Kit

Ultra High Lift Control Surface

The KIN UltraFlap Ultra Light kit is designed to transform aileron control and wing lift. Whether you're a fan of bush planes, STOL flying, slow-speed training, or even aerobatics, this innovative control surface is for you. By working with your existing ailerons, it significantly increases lift and enhances control at low and high speeds, making takeoffs and landings shorter and smoother than you thought possible.

Engineered for Easy Building & Lasting Durability

Building models using traditional balsa wood methods can be a learning curve. That's why we engineered the UltraFlap Ultra Light kit for a straightforward assembly experience, even if you're new to the traditional balsa wood style building. While it utilizes traditional construction principles, we've made a key upgrade: PCTG plastic instead of balsa wood. This material is incredibly tough, lightweight, and resistant to high temperatures and UV, ensuring your model stands up to the rigors of flight and time while eliminating any need for cutting or sanding of balsa wood.

***1-2 hours of Assembly Required***

If you don't feel confident in assembling this Ultra Light version the original version is assembled in ~30 mins and only requires CA glue. LINKED HERE

**We suggest upgrading the wing servos to Emax ES09D servos or stronger**

Our design choices make the building process as smooth as possible:

• Rib Template: A specialized template perfectly spaces and aligns each rib, holding them in place for simple gluing of the carbon fiber rods.
• Symmetric Airfoil: This design significantly reduces potential assembly errors while ensuring balanced and predictable aileron control.
• Airfoil Fence Fins: Beyond their lift-enhancing properties, these fins also protect your vinyl airfoil covering from ground impact damage.
• Spare Parts: We include extra common components, just in case something gets misplaced during assembly or needs replacing after an accidental impact.

Consisting of PCTG plastic parts, carbon fiber tubes and rods, and lightweight vinyl covering, the KIN UltraFlap achieves an ultra-light and remarkably stiff construction. While perfectly sized for the AeroScout, its versatile control surface pivot arm allows for broad compatibility with most high-wing and mid-wing RC aircraft (if you dare), whether they're foam or balsa builds.

Key Features:

• STOL Competition Ready: Increased slow speed lift for short takeoff and landing performance, perfect for competitive or casual use.
• Enhanced Lift & Control Authority: The detached flap design creates high lift through dual downward airflow deflections, improving overall control.
• Reduced Stall Speed: Experience greater control and stability at slower airspeeds.
• Ultra-Lightweight & Durable Construction: Combines carbon fiber and PCTG plastic for a strong yet feather-light build.
• Configurable Use: Adapt the UltraFlap as Ailerons, Flaps, or Flaperons to perfectly match your control setup and flying style.

Control System Compatibility

• Stock AeroScout Spektrum receiver: If your setup uses the stock receiver, the flaps will function primarily as ailerons in a single channel. However, you can pre-set a flap deflection (e.g., 10-15°) before flight to gain additional lift. Or just enjoy the increased aileron control at 0°.
• Full Flaperon Control: For dynamic flaperon mixing and complete control, we recommend upgrading to an unlocked Spektrum receiver such as the AR631 or the AR637T. This allows the airplane to be set up as 2-channel ailerons with Flaperons functionality.

What's Included:

• 2x 3mm Carbon Fiber Tubes
• 4x 2mm Carbon Fiber Rods
• 3x Vinyl Covering Sheets (1 spare; 350mm x 150mm each)
• 4x Control Horn Ribs (2 spares)
• 6x End Ribs (2 spares)
• 16x Inner Ribs
• 4x Fins (2 spares)
• 4x Mounting Arms (2 spares)
• 4x Flat Mounting Plates (2 spares)
• 2x Decals
• 4x M2 x 8mm Bolts (2 spares)
• 4x M2 x 5mm Bolts (2 spares)
• 8x M2 Washers (2 spares)
• 4x Dual Aileron Connectors (2 spares)
• 6x Dual Aileron Connector Rods (2 spare)

⚠️ Important Considerations & Tradeoffs

Every performance upgrade involves tradeoffs, and we want to ensure you know what to expect:

• Increased Drag: While the KIN UltraFlap dramatically increases lift, it will also introduce more drag, particularly at high deflection angles. This reduces glide efficiency and may require more power during landing approaches.
• Control Mixing Complexity: Configuring for full flaperon functionality requires two channels for ailerons, flaps set up in transmitter, and servo rates and expos adjusted.
• Increased Servo Load: At high deflection angles and high speeds, the flap surfaces exert increased torque on servos. The stock AeroScout wing servos, Spektrum A390, survived all tests, however servo stall was experienced during high speed flap deployment or high speed Acro. Upgrading to Emax ES09D servos is a suggested upgrade.
• New Stall Behavior: Be aware that stall characteristics will change with increasing flap deflection angles. Avoid slow banking turns in these configurations. We strongly recommend practicing high-altitude maneuvers to safely familiarize yourself with your aircraft's new behavior.