The Rumpler C.X, given the company designation Rumpler 8C 14, was a German two-seater, developed from the earlier Rumpler 8C 13 prototype by Rumpler in early 1918. The prototype had a similar wing cellule to the C.VII, and was initially powered by a 260 hp (194 kW) Mercedes D.IVa engine, later powered by a 240 hp (179 kW) Maybach Mb.IVa engines). The C.X had the highest top speed and service ceiling of all German C-type aircraft and an order was placed for the aircraft in August 1918. However, only a few were built and tested before the war ended.
- Crew: 2
- Length: 6.9 m (22 ft 8 in)
- Wingspan: 10.5 m (34 ft 5 in)
- Height: 3.12 m (10 ft 3 in)
- Wing area: 29 m2 (310 sq ft)
- Empty weight: 950 kg (2,094 lb)
- Gross weight: 1,385 kg (3,053 lb)
- Powerplant: 1 × Maybach Mb.IV 6-cyl. water-cooled in-line piston engine, 180 kW (240 hp)
- Maximum speed: 195 km/h (121 mph; 105 kn)
- Endurance: 3⅓ hours
- Service ceiling: 7,800 m (25,591 ft)
- Rate of climb: 3.07 m/s (604 ft/min)
- Time to altitude: 6,000 m (20,000 ft) in 27 minutes, 7,800 m (25,600 ft) in 59 minutes
- Guns: 1x fixed LMG 08/15 Spandau machine gun + 1x manually aimed Parabellum MG 14/17 machine gun on a flexible mount in the rear cockpit.