The O.S. Ducted Fan engines are designed to develop high power at high RPM.
These are used in jet (Ducted Fan) models where the engine drives a turbine-
like impeller (compressor) that draws a large quantity of air through a shroud
to create thrust.
These engines are NOT covered under the O.S. 2-year warranty
(due to the high-performance nature of this engine, reliability is sacrificed).
The Ducted Fan DOES NOT come with this engine. One must purchase the fan to fit
BOTH the engine size and the specific plane (these fan units are
typically manufactured by the same people who make the plane kit - like Jet
Hangar Hobbies (562) 467-0260
Rear exhaust Schnuerle Porting
2 crankshaft ball bearings 2-piece crankcase
Disc valve induction Rear-mounted carburetor
ABC piston/cylinder (an Aluminum piston with a Chromed Brass cylinder)
Purple anodized head .
Operating and break-in instructions
O.S. decal sheet
"O.S. Engine Line-Up" poster
Construction: Aluminum and Aluminum alloys
Displacement: 7.45cc (.0455 cu in)
Bore: 22.0mm (.866") Stroke: 19.6mm (.772")
Max Output: 2.5 PS, 2.47 HP at 23,000 RPM Weight: 470g (16.6oz)
Practical RPM Range: 2,500 - 28,000 RPM
Length: 116mm (4.57") length from carb intake to front of drive washer
Width: 35mm (1.38") neglecting the engine mounting flanges
44mm (1.73") distance between the mounting hole centers
Height: 91mm (3.58")
Crankshaft thread size: 1/4-28
Needle Settings: High Speed: 1-1.5 turns out from fully closed
Mixture Control (low speed): 2.5 turns out from fully
REQUIRES: A Glow Plug (O.S. #8 (OSMG2691) is recommended)
A tuned pipe (MACG1140), coupler, and header.
Fuel with 20% MINIMUM lubricant content and 20%-50% Nitromethane
** Wildcat 5%-25% Ducted Fan fuels we carry meet this requirement
Fan unit (depends on ducted fan airplane kit)
JBN and eke 1-15-98
updt lmm 4/6/09
The big difference between this engine and the previous .46 VR-DF is that
this .46VX-DF has a higher power rating than the VR-DF.