Motorstar NA: Radial Aircraft Engine Sales And Service

R-263 125 Hp Engine Specifications

Number of Cylinders --------------------------- 5
Cooling System -------------------------------- Air
Bore ------------------------------------------------ 4.25 in.
Stroke ---------------------------------------------- 3.7 in
Displacement ------------------------------------ 263 in.3
Sense of Rotation ------------------------------ Clockwise
Compression Ratio ----------------------------- 7:1
Starting System --------------------------------- Electric
Ignition system ---------------------------------- Dual Magnetos
Fuel System ------------------------------------- Fuel Injection
Oil System --------------------------------------- Pressure and Scavenge pump
Max Power --------------------------------------- 125 HP @ 2700 RPM
Max Speed -------------------------------------- 3200 RPM
Idle Speed --------------------------------------- 800 RPM
Diameter ----------------------------------------- 33 in.
Length -------------------------------------------- 27 in
Dry Weight -------------------------------------- 220 lbs.
Fuel ----------------------------------------------- 80/87 min or Auto Fuel
Propeller Flange ------------------------------- SAE #2