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
- 50cc displacement perfect for scale project
- Comes complete with exhaust collector ring,spark plugs,electronic ignition, and engine mount ready to run
- User-friendly choke and throttle bell cranks 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
- Burns 87-110 octane gasoline with 32:1 gas/oil mixture
Specifications
UMS Gas Radial Engine Manual 7-50
| Standard | Metric | |
|---|---|---|
| Type | 4-Stroke Petrol | SPARK IGNITION |
| CYLINDER | 7 (ABC TYPE) | 7 (ABC TYPE) |
| CAPACITY (CU. IN) | 3 | 50CC |
| Bore | 0.79″ | 20.2MM |
| Stroke | 0.86″ | 22MM |
| Thrust* | 11lbf @ 20×8 Menz prop. | 5kgf @ 20×8 Menz prop. |
| Power (HP) | 3.3 | 3.3 |
| Rotation (RPM) | 1000 – 6300 | 1000 – 6300 |
| Weight | 3.7lbs | 1.7kg incl.(silencer ) |
| Engine Diameter | 7.3″ | 185MM |
| Engine Length | 5.7″ | 145MM |
| Propeller** | 17×10, 18×12, 20×8 | 17×10, 18×12, 20×8 |
| Muffler Type | Collector Ring | Collector Ring |
| Plug Type | 1/4-32 RcExl | 1/4-32 RcExl |
| Carburetor | UMS | UMS |
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