UMS 50cc Gas / Petrol 7 Cylinder Radial 4 Stroke Engine

The UMS 7-50 is a very reliable radial engines which uses gas as fuel. UMS has a ton of experience building radial engines. It has brought more than 2000 engines to market so far. The design and construction are upper class leading to a outstanding realibility of these engines. They are easily servicebale. All critical parts are easily accessible.

• 7-cylinder radial configuration—absolutely stunning looks and realism
• 4-stroke
• Midsize 50cc displacement
• Comes complete with exhaust collector ring and electronic ignition —one-box purchase for a ready-to-mount-and-run engine
• User-friendly choke and throttle bellcranks included—makes installation and operation easy
• Made from aluminum or bar stock where appropriate and CNC-machined—accurate and repeatable specifications each and every time
• Cylinder head and crankcases produced from aircraft grade alloys
• Heavy-duty double bearing crankshaft
• Billet aluminum pistons and hardened steel rings
• Hard-chromed and lapped cylinder bores
• Hardened steel cams

Technical information 

• Cylinder:                   7 
• Cylinder capacity:     50cc
• Bore:                         20.2mm
• Stroke:                      22mm
• Power:                      5kg of thrust
• RPM Range:            1200-6000
• Weight:                     2.54Kg incl.(ignition coil and silencer)
• Width:                       195mm
• Lenght:                     135mm
• Propeller:                  21 x 10 1000 - 5900 RPM 2 Blade Menz's
• Propeller:                  22 x 8   1000 - 5600 RPM 2 Blade Menz's
• Propeller:                  20 x 8     900 - 5100 RPM 3 Blade Biela
• Muffler type:              Collector Ring
• Plug type:                  1/4-32 RCEXL
• Carburetor:                UMS Carburetor
• Petrol/Oil Mix:           1:32 2 stroke oil