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Pictured is Otis Lockin's R-180 which he built
from castings. It is mounted on his test stand. He constructed the exhaust
from his own plans
Right side.
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 R-180 movie |
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| Horsepower | 75 @ 2150 rpm |
| Weight | 122 lbs. |
| Displacement | 180 cubic inches |
| Bore | 3.625 inches |
| Stroke | 3.5 inches |
| Compression Ratio | 7:1 |
| Intake Valve | 1.8 in. |
| Exhaust Valve | 1.2 in. |
| Valve Lift (all) | 0.250 in. |
| Valve Clearance | 0.014 in. |
| Ignition Timing Start | TDC |
| Ignition Timing Run | 38 deg. btc |
| Oil Pump Capacity | 5.5 qt./min. @ 2150 rpm |
| Scavange/feed pump | 8:3 ratio |
| Main/thrust bearings | Tapered roller |
| Master rod bearings | Two row ball |
| Link rod bearings | Plain journal bearings |