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Oberursel Engine
Oberursel Gallery
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Oberursel Engine
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UR2 parts
UR.2 engine support
Even fasteners had to made to original dimensions
Washers
Valve springs
Anchor plate nuts
Exhaust valve guide
Exhaust valve guide
UR.2 pushrods
Unmachined Piston
Partially machined piston
Partially machined piston
UR.2 crankcase front cover
Inside of Crankcase front cover
Accesory drive gear
Main drive gear
Rear face of main drive gear
Intake tube detail
Intake tubes
Intake housings
Intake housing detail
Machining intake housings
Complete prop hub and prop shaft
Prop hub detail
Complete prop hub and prop shaft
Drive components
Crankcase prop shaft
UR.2 thrustblock half
UR.2 thrust block pairs
UR.2 Thrustblock pair
UR2 crankcase
The beginning of a UR.2 crankcase
Rough first step in making a crankcase
Rough machined crankcases
Machining a crankcase
Machining a crankcase for the UR.2
Original crankcase front cover
New nameplate for TVAL reproduction engines
Rear crankcase fitted to main crankcase section
Intermediate step in making a crankcase
Detail of machining process
Partially machined crankcase
Finished crankcase
UR2 cam
UR.2 cam assembly
UR.2 cam assembly with bearing installed
Detail of cam roller
Full set of cam followers
Cam followers ready for installation
Cam followers
Detail of cam follower
Pushrod end fitting attached to cam follower
Each assembly is matched to a particular engine like the original
UR2 cylinder
The start of a UR.2 cylinder
First step in machining a UR.2 cylinder
Cutting cooling fins
Lots of material removed during the turning process
Bore roughed and threads cut
Spark plug area detail
Combustion chamber detail
Turning portion of manufacturing process
Partially machined cylinders ready for next step
Intake tubes
Cylinder head detail
Cooling fin detail ,note tapering fins
Nearly finished cylinders
Spark plug opening detail
Original cylinder and partially machined cylinder
Completed cylinders
UR2 conrod
Rough machined UR.2 conrods
Gudgeon pin end of conrod
Conrod in position in crankcase
Full set of conrods in position in crankcase
First inner conrod fitted to thrust block
Set of three interlaced conrod in thrustblock
Fourth conrod in position in thrustblock
Full set of Nine conrods in position in thrustblock
Conrods installed in thrustblock
UR.2 thrustblock details
UR2 assembly
UR2 test
Nick Hogan and Graham Lye prepare the Oberursel for running in
Engine mount details and magneto in view
Engine mount details and oil pump drive gear
Our test stand, note the oil pump in view at the rear of the engine
Great angle to show how compact rotary engines are
After a few short runs the engine was checked over and found in perfect condition
Everyone is excited to hear the oberursel run.
Beautiful new rotary engine ready to run
Cylinder details after running
Cylinders after a short run
Valve rocker mechanism
A sight to behold
Marsha Murphy and Fred Murrin "running in" TVAL's Oberursel
Fred Murrin running the engine at various power settings to check mixture and performance
The UR.2 becomes a blur when running
Fred Murrin and Gene DeMarco discuss the UR2's performance
Fed Murrin operating the UR.2
Fred putting some time on the new engine
Smooth and powerful
At this point we've accumulated nearly ten hours without a single fault
Another side view showing the accessories
Simply AMAZING!
Oberursel UR.II
UR.2 - Exploded View of Engine Assembly
Oberursel Engine Cutaway CAD
Oberursel poster 1
Oberursel poster 2
Fred and Gene testing the Engine
UR.2 Still
More on Oberursel Engine...
Oberursel Reproduction
Oberursel Engine Running
Film of Rotary Engine Workings
Machining parts for the UR2 (02)
Machining parts for the UR2
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