Advanced Scout

American all-solid orbital launch vehicle. Proposed upgrade of Scout proposed by the University of Rome with two strap-ons from the Ariane 4. Launch would have been from Italy's San Marco platform off Kenya. Further work cancelled in 1993.

LEO Payload: 521 kg (1,148 lb) to a 200 km orbit at 1.00 degrees. Flyaway Unit Cost 1985$: 8.000 million.

Stage Data - Advanced Scout

• Stage 0. 2 x Ariane 3-0. Gross Mass: 9,663 kg (21,303 lb). Empty Mass: 2,313 kg (5,099 lb). Thrust (vac): 689.990 kN (155,116 lbf). Isp: 263 sec. Burn time: 29 sec. Isp(sl): 240 sec. Diameter: 1.07 m (3.51 ft). Span: 1.07 m (3.51 ft). Length: 8.32 m (27.29 ft). Propellants: Solid. No Engines: 1. Engine: SPB 7.35. Other designations: SPB 7.35. Status: Out of Production.

• Stage 1. 1 x Algol 3. Gross Mass: 14,320 kg (31,570 lb). Empty Mass: 1,600 kg (3,500 lb). Thrust (vac): 471.905 kN (106,088 lbf). Isp: 284 sec. Burn time: 75 sec. Isp(sl): 238 sec. Diameter: 1.14 m (3.74 ft). Span: 1.14 m (3.74 ft). Length: 9.40 m (30.80 ft). Propellants: Solid. No Engines: 1. Engine: Algol 3. Status: In Production.

• Stage 2. 1 x Castor 2. Gross Mass: 4,424 kg (9,753 lb). Empty Mass: 695 kg (1,532 lb). Thrust (vac): 258.915 kN (58,206 lbf). Isp: 262 sec. Burn time: 37 sec. Isp(sl): 232 sec. Diameter: 0.79 m (2.59 ft). Span: 0.79 m (2.59 ft). Length: 6.04 m (19.81 ft). Propellants: Solid. No Engines: 1. Engine: TX-354-3. Status: In Production.

• Stage 3. 1 x Mage 2. Gross Mass: 530 kg (1,160 lb). Empty Mass: 40 kg (88 lb). Thrust (vac): 45.483 kN (10,225 lbf). Isp: 293 sec. Burn time: 44 sec. Diameter: 0.77 m (2.52 ft). Span: 0.77 m (2.52 ft). Length: 1.52 m (4.98 ft). Propellants: Solid. No Engines: 1. Engine: Mage 2. Status: Out of Production.

• Stage 4. 1 x Altair 3. Gross Mass: 301 kg (663 lb). Empty Mass: 25 kg (55 lb). Thrust (vac): 27.400 kN (6,160 lbf). Isp: 280 sec. Burn time: 27 sec. Isp(sl): 255 sec. Diameter: 0.64 m (2.09 ft). Span: 0.64 m (2.09 ft). Length: 2.53 m (8.30 ft). Propellants: Solid. No Engines: 1. Engine: FW-4S, TEM640. Status: Out of Production.