The Extreme Flight 85" Muscle Bipe is here – an extraordinary blend of classic biplane beauty and modern aerobatic performance. Inspired by Jimmy Franklin’s iconic Mystery Ship Waco, this aircraft delivers the nostalgic appeal of vintage barnstormers while packing cutting-edge design, strength, and agility.

Whether you prefer smooth precision and airshow-style manoeuvres or low-and-slow 3D flight, the Muscle Bipe inspires confidence in pilots of all skill levels. With quick-connect mechanisms for wings and stabs, field assembly takes only minutes – no tools required!

Designed for 70cc twin-cylinder petrol engines, Saito FG-90R3 radial engines, or 12S 5000W+ electric power setups, the Muscle Bipe is as versatile as it is breathtaking. Built using carbon fibre, G10 composite, and lightweight ply, it’s both durable and highly refined – ready to perform from the first flight.

Experience the perfect balance of heritage style, engineering innovation, and flying excitement with the Extreme Flight 85" Muscle Bipe!

Key Features

• ✅ Inspired by Jimmy Franklin’s legendary Mystery Ship Waco

• ✅ Quick-connect, tool-free field assembly in minutes

• ✅ Carbon fibre wing/stab tubes, landing gear & tailwheel assembly

• ✅ Lightweight composite-reinforced airframe for strength and rigidity

• ✅ Compatible with gas, radial, or 12S electric power setups

• ✅ Factory-applied Ultracote (Oracover) colour schemes

• ✅ Pre-hinged and sealed control surfaces for quick, accurate build

• ✅ Classic looks meet modern Extreme Flight performance

Perfect For

• Pilots seeking a unique, high-performance 70cc biplane

• RC enthusiasts who enjoy both classic airshow and 3D flight styles

• Builders wanting quick field setup with modern locking systems

• Flyers looking for versatility between gas, radial, or electric power

Specifications

• Wingspan: 85” (2159 mm)

• Length: 83” (2108 mm)

• Spinner: 4.5”

• Weight: 19–21 lbs (8.6–9.5 kg)

• Centre of Gravity: Centre of upper wing tube to approx. 2” behind

• Construction: Carbon fibre reinforced composite structure

• Colour Schemes:

  • Red/White/Gold

  • Yellow/Black/Silver

  • Blue/White/Gold

Control Surface Settings (Recommended Starting Point)

Power System Options

Gas Power:

• Engines: 70cc twin-cylinder (DA-70, GP-76)

• Radial Option: Saito FG-90R3 with cooling baffle included

• Fuel Tank: FlowMaster 24oz

Electric Power:

• Motor: XPWR 60cc or similar 5000W+ setup

• Battery: 12S 5000–6000mAh LiPo

• ESC: Castle Creations HV-160

Servos & Hardware

• Servos: 7 × high-torque metal gear digital (Savox 2290, MKS HBL599, JR 8911)

• Throttle Servo: MKS HV1250

• Servo Arms:

  • 4 × 1.5” (Ailerons)

  • 2 × 2” (Elevators)

  • 2 × 2” (Push–Pull Rudder)

• Servo Extensions:

  • 2 × 36” (Upper Wing Ailerons)

  • 2 × 12” (Lower Wing Ailerons)

  • 3 × 48” (Elevators/Rudder)

  • 1 × 24” (Throttle)

  • 1 × 24” (Choke)

Covering Options (Oracover / Ultracote)

Red/White/Gold Scheme:

• Ferrari Red #23 / True Red #HANU866

• White #10 / #HANU870

• Gold #92 / #HANU879

Yellow/Black/Silver Scheme:

• Cadmium Yellow #33 / Bright Yellow #HANU872

• Silver #91 / #HANU881

• Black #71 / #HANU874

• White / #HANU870

Blue/White/Gold Scheme:

• Dark Blue #52 / Midnight Blue #HANU885

• White #10 / #HANU870

• Gold #92 / #HANU879

Why Buy From Probuild Aircraft

• ✅ Official UK stockist of Extreme Flight Aircraft

• ✅ 100% genuine products – trusted by world-class pilots

• ✅ Fast, reliable UK shipping

• ✅ Trusted by RC pilots since 1993