Jacobs R-830

The Jacobs R-830 or L-5 is a seven-cylinder, air-cooled, radial engine for aircraft manufactured in the United States by the Jacobs Aircraft Engine Company, beginning in 1935.

Design and development
The R-830 was effectively an enlargement of the R-755 with strengthened stressed parts. With a bore and stroke of 5.0 in × 5.5 in (140 mm × 127 mm) the displacement was 831 cu in (13.6 L), takeoff power was around 285 hp (212 kW). The engine features steel cylinders with aluminum-alloy cylinder heads.

Applications

 * Beechcraft Model 18B & S18B Expeditor
 * Beechcraft B17B and C17B Staggerwing
 * Fleet 50J Freighter (prototype only)
 * Fleetwings Sea Bird
 * Howard DGA-9
 * Spartan 7X Executive (prototype only)
 * Waco ZKC-S, ZKS-6 & 7 Standard Cabins
 * Waco YOC-1 ZQC-6 ZGC-7 Custom Cabins
 * Waco ZVN-8 Custom Cabin
 * Waco ZPF-6 and ZPF-7