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Riley Turbostream / Super 310/320

Jack Riley produced variants of the Cessna 310 to improve performance. The Riley Rocket 310 and the Riley Turbostream 310 replaced the standard Continental 310 hp (230 kW) engines with Lycoming TIO-540 350 hp (261 kW) engines. These turbocharged intercooled engines were installed with three-blade Hartzell propellers in a counter-rotating configuration to further increase performance and single-engine safety. At 5,400 lb (2,400 kg) gross weight the aircraft had a weight to power ratio of 7.71 lb (3.50 kg) per horsepower. This resulted in a cruising speed of 260 knots (480 km/h) at 18,000 feet (5,500 m) and a 3,000fpm rate of climb.

The Riley 65 and Riley Super 310 conversions used Continental engines.

 

Variants:

Riley 65

Cessna 310 to 310G by fitting two 240-260 hp (179–194 kW) Continental O-470D/-470M engines.

Riley Super 310

Conversion of Cessna 310/320 by fitting two 310 hp (231 kW) Continental TSIO-520-J/-N engines.

Riley Turbostream

Conversion of Cessna 310 by fitting two 350 hp Lycoming engines.

Riley Rocket

Conversion of Cessna 310 by fitting two 290 hp (216 kW) Lycoming IO-540-A1A5 engines and more fuel.


Specifications:

 

Riley Super Turbostream / Cessna 310/320
Engines: 2 x Continental TSIO-520-J2BD, 350 hp
Seats: 4/6
Wing loading: 30.73 lb/sq.ft
Pwr loading: 7.9 lb/hp
Max TO wt: 5500 lb
Empty wt: 3600 lb
Equipped useful load: 1601 lb
Payload max fuel: 185 lb
Range max fuel/ 75% cruise: 1235 nm/4.7 hr
Range max fuel / 55% cruise: 1721 nm/ 7.7 hr
Service ceiling: 36,000 ft
75% cruise: 260 kt
55% cruise: 225 kt
Vmc: 82 kt
Stall: 73-82 kt
1.3 Vso: 95 kt
ROC: 3200 fpm
SE ROC: 600 fpm @ 106 kt
SE ceiling: 25,000 ft
Min field length: 1400 ft
Fuel cap: 1218/1416 lb

Riley Super 310, 320 / Cessna 310/320
Engines: 2 x Continental TSIO-520-J, 310 hp
Seats: 4/6
Wing loading: 30.73 lb/sq.ft
Pwr loading: 8.25 lb/hp
Max TO wt: 5500 lb
Empty wt: 3400 lb
Equipped useful load: 1818 lb
Payload max fuel: 600 lb
Range max fuel/ 75% cruise: 1306 nm/5.1 hr
Range max fuel / 55% cruise: 1644 nm/ 7.2 hr
Service ceiling: 36,000 ft
75% cruise: 255 kt
55% cruise: 230 kt
Vmc: 83 kt
Stall: 67-76 kt
1.3 Vso: 87 kt
ROC: 2200 fpm
SE ROC: 500 fpm @ 106 kt
SE ceiling: 24,000 ft
Min field length: 1550 ft
Fuel cap: 960/1218 lb

 

 


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