O.S. MAX-25FX 2-Stroke Engine for Airplane (with Muffler)
This is a New High-Performance .25 FX. which replaced O.S. .25 SF. The FX is Designed to Use a Muffler or Tuned Pipe. This Engine may be used in Sport and Aerobatic Aircraft. The state-of-the-art in sport/competition engines!
Features:
- Remote Needle Attached to the Backplate keeps fingers away from prop
- Twin Ball Bearing-Supported Crankshaft
- Schnuerle Porting (Schnuerle scavenging)
- Advanced Bi-Metallic Liner. This process uses a double layer of plating material, rather than one thicker layer. This helps the metal to bond to the cylinder, and is more durable. Also, the plating process is more consistent, resulting in a more precise fit between piston and sleeve, for better compression, longer life.
- Side Exhaust
- One-Piece Crankcase
Specifications:
Displacement: 4.07cc (.2485 cu in)
Bore: 18mm (.708")
Stroke: 16mm (.630")
Horsepower: .84 BHP at 18,000 RPM
Weight: 248g (8.8oz) 10.8oz w/muffler
Length: 75.6mm (2.98") distance from the backplate to drive washer
Width: 30mm(1.18") width of engine neglecting engine mounting flanges
38mm (1.50") distance between centers of the mounting holes
Height: 75.5mm (2.97")
Crankshaft Thread Size: 1/4-28
Recommended Props: Pattern Flying: 9x5, 9x6
Pattern Flying if a tuned pipe is used: 9.5x5
Sport Flying: 9x5, 9x6, 9.5x5, 10x4, 10x5
Practical RPM Range: 2,500 - 19,000 RPM
Needle Settings:
High Speed Needle: 1.5-2 turns out from fully closed
Low Speed Needle: 2mm gap between the needle and spray bar at full throttle (looking down the neck of the carb)
Package Includes:
- One Expansion Style Muffler
- One Assembled .25 FX w/Carburetor
- Instructions
Requires:
Long Glow Plug (O.S. #8 recommended)
Fuel: Fuel with 18% (minimum) lubricant content and 5%-15% Nitromethane (All 5%-15% fuels we carry meet these requirements)
Code No. 12660
Note:
We have full range of O.S. products, if you cannot find your desired product(s) in our online store, please send request to cs@rc711.com.
|
Helicopters 
