O.S. 91VR-DF Round Head Ducted Fan engine for DF Plane
The O.S. 91VR-DF 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. Because this is a high-performance engine, reliability is sacrificed.
***The Ducted Fan does NOT come with this engine.
FEATURES:
Rear Exhaust .
Schnuerle Porting
2-piece Crankcase
2-Crankshaft Ball Bearings
Rear-Mounted Carburetor
Drum Rotor Induction
ABC piston/cylinder (aluminum piston with a chromed brass cylinder)
INCLUDES:
One Assembled .91 VR-DF Engine w/small head
One Set of Instructions and Poster
One Exhaust Adaptor w/screws and O-ring
One Bellcrank for use with the remote needle assembly
SPECS:
Construction: Aluminum and Aluminum alloys
Displacement: 0.91 cu in
Bore: 27.7mm (1.09")
Stroke: 24.5mm (.97")
Max Output: 4.8 BHP at 22,000 RPM
Practical RPM Range: 2,500 - 25,000 RPM
Weight: 662g (23.4oz)
Length: 133.5mm (5.26") from carb intake to front of drive washer
Width: 43.5mm (1.71") neglecting the engine mounting flanges
52mm (2.05") distance between mounting hole centers
Height: 103.3mm (4.07")
Crankshaft: 5/16-24
REQUIRES: *A Glow Plug (O.S. #8 or McCOY No.9 is recommended)
*tuned pipe.
*Fuel with 20% MINIMUM lubricant content and 20%-50% Nitromethane
*Fan unit (Ramtec or Dynamax Fan unit)
*Ship by Hong Kong Post Office Registered Mail (Air Shipping)
*Will ship to worldwide, Item will be sent out within 5 days after payment received.
*Notification will be sent to buyers.
*Real-time online tracking service
*Please check additional items now from our ebay stores. 
Manufacturer: N/A
SKU: JT0844
