Round Cowl. Pure Power. The Yak is Back!

The Extreme Flight 85" Yak 54-EXP has landed – and it’s everything fans of round-cowl aerobats have been waiting for!

Scaled down from its legendary 91" and 110" big brothers, this all-new design captures the unmistakable lines and unmatched flight character of the full-size Yak, now optimised for the popular 50cc power class.

Built using the latest generation of composite and carbon-reinforced construction, the Yak 54-EXP combines strength, rigidity and lightness in perfect balance. It features CNC-machined aluminium wing, stab and canopy locking systems for super-fast field assembly, plus modern aerodynamic shaping that delivers jaw-dropping performance across the entire aerobatic envelope.

Whether you fly precision, freestyle 3D or all-out XA, the 85" Yak 54-EXP offers the legendary "Yak feel" — stable, predictable, and beautifully fluid through every manoeuvre.

Key Features

✅ Latest-generation Extreme Flight composite construction
✅ Classic round-cowl Yak styling with modern aerodynamic updates
✅ Carbon-reinforced wing spars, tailwheel, and tube assemblies
✅ CNC-machined aluminium quick-lock wing, stab and canopy mechanisms
✅ Pre-hinged and sealed control surfaces for rapid assembly
✅ Ideal for both 50cc petrol or 12S electric power systems
✅ Ultra-rigid, lightweight structure for precision and 3D/XA flight
✅ Available in vivid, high-visibility Ultracote / Oracover colour schemes

Perfect For

• 50cc gas or equivalent electric setups

• Pilots who love the smooth, stable “Yak style” flight feel

• Intermediate to advanced 3D/XA flyers

• Anyone wanting a distinctive round-cowl aerobat with modern performance

SPECIFICATIONS

Wingspan: 85 in (2159 mm)
Length: Approx. 84 in (2130 mm)
Wing Area: ~1350 sq in
Weight: 16 – 16.5 lbs (7.3 – 7.5 kg)
Spinner: 4" (Carbon or aluminium recommended)

(Specs as typical for Extreme Flight 85" class models; subject to minor variation.)

Power System Options

🔥 Gas Setup

• Engine: Desert Aircraft DA-50, DLE-55 or GP-50R

• Prop: 23×8 or 24×8 carbon

• Tank: FlowMaster 17 oz

• Accessories: EF Magnetic Fuel Dot & FlowMaster fuel tubing

⚡ Electric Setup

• Motor: XPWR 40cc or Dualsky GA6000

• ESC: Castle Creations HV-120 / HV-160

• Battery: 12S (2×6S 4000–5000 mAh LiPos)

• Prop: XOAR or Falcon 21×10 / 22×10 wood electric

Recommended Radio & Servos

• Servos: 5 × full-size, metal-gear, high-torque (400+ oz-in)

  • Savox SV-1270MG or MKS HBL-380 recommended

• Throttle Servo: MKS HV1250 or equivalent

• Servo Arms:

  • 2 × 1.5” (Ailerons)

  • 2 × 2” (Elevators)

  • 1 × 3–4” (Rudder)

• Servo Extensions:

  • 2 × 6” (Rx → Ailerons)

  • 2 × 12” (Ailerons)

  • 2 × 48” (Elevators)

  • 1 × 24” (Throttle)

Additional Items

• EF anodised 3 mm washer set

• EF Velcro straps (black, blue or red)

• EF servo clips and extension holders

• EF socket head servo mounting screws

• Pilot X (¼ scale) optional – not included

Why the Yak 54-EXP?

The Yak 54 has always been the gold standard for predictable, flowing 3D flight. The new 85” EXP version combines that timeless stability with the agility and precision of modern composite construction – giving pilots the confidence to push their skills to the next level.

Why Buy from Probuild Aircraft

✅ Official UK Extreme Flight Distributor
✅ Expert advice and setup support
✅ Fast UK and worldwide delivery
✅ Genuine parts, spares and accessories always in stock
✅ Trusted RC specialists since 1993