Re: Ariane Liquid Booster
- From: BradGuth <bradguth@xxxxxxxxx>
- Date: Sat, 13 Sep 2008 20:57:14 -0700 (PDT)
On Sep 13, 5:13 pm, Willie.Moo...@xxxxxxxxx wrote:
Replace each EAP solid booster with an uprated cryogenic booster EPC+
This puts 72.5 metric tons into LEO and 39.5 metric tons GTO - with
return and recovery of the kick stage. A 20 meter long landing stage
that masses 39.5 metric tons lands and returns 4.2 metric tons of
useful payload on the moon and Mars.
186,000 kg becomes 270,330 kg with an increase the diameter 14.4% and
increase the length 14.4% to increase the size of the EPC+ by 50%
The structural mass of the EPC+ is double that of the EPC - to account
for TPS to survive re-entry and glide to a landing.
EPC+ specifications -
Stage1 2x Ariane 5 EPC+ 278,330 kg (613,610 lb) Empty Mass 25,500 kg
(56,000 lb) Motor 2 x Vulcain 3 pumpset annular aerospike
arrangement. Thrust (vac) 2,228,000 kN (500,874 lbf) Isp 434 sec.
Length 34.89 m (114.40 ft) Diameter 6.25 m (20.50 ft) Propellants
Lox/LH2
Stage2 1x Ariane 5 EPC+ 278,330 kg (613,610 lb) Empty Mass 25,500 kg
(56,000 lb) Motor 2 x Vulcain 3 pumpset annular aerospike
arrangement. Thrust (vac) 2,228,000 kN (500,874 lbf) Isp 446 sec.
Length 34.89 m (114.40 ft) Diameter 6.25 m (20.50 ft) Propellants
Lox/LH2
278330 kg total
25500 kg structure
252830 kg propellant
4254.1548 m/sec Ve
72500 kg payload
0.557207242 u1 fraction
3465.661813 Vf1 speed
0.720662429 u2 fraction
4371.7812 m/sec Ve
5575.482503 Vf2 speed
9041.144316 Vft speed
The third stage is ienlarged
Stage3: 1 x Ariane 5 ESC A+. Gross Mass: 33,000 kg (72,600 lb). Empty
Mass: 6,300 kg (13,800 lb). Motor: 2 x HM7-B.pumpsets in an annular
aerospike arrangement with zero height heat sheild. Thrust (vac):
129.400 kN (29,090 lbf). Isp: 446 sec. Length: 14.00 m (45.93 ft).
Diameter: 6.25 m (20.50 ft) Propellants: Lox/LH2.
33000 kg total
6300 kg structure
26700 kg propellant
446 sec Isp
4371.7812 m/sec Ve
0.368275862 u1 fraction
39500 kg payload
2007.969907 Vf speed
11049.11422 Vft speed
Stage 4 1 x Ariane 5 ESC L+ Gross Mass 39,500 kg (86,900 lb) Empty
Mass 6,300 kg (13,800 lb) Motor 2 x HM7 -B pumpsets in an annular
aerospike arrangement with zero height heat sheild. Thrust (vac)
129,400 kN (29,090 lbf) Isp 465 sec. Length 20.00 m (65.6 ft)
Diameter 6.25 m (20.50 ft) Propellants Lox/LH2
The tank is lengthened 1 meter - and a 5 meter tall piloted capsule is
perched atop the stretche booster - the capsule fully provisioned
masses 4,290 kg. The delta vee of the stage is 6 km/sec.
Both ESC stages enter atmosphere tail first, and soft land under
rocket power as well as take off vertically under rocket power from
the moon and Mars.
There is basically a cryogenic booster, a cryogenic upper stage, and a
piloted capsule. The piloted module carries 3 to 4 astronauts - and
is much larger than the Apollo capsule, but made lighter due to
advanced systems and materials. Ullage gases from the booster stage
are siphoned off to produce power and breathable atmosphere (3 psi
pure oxygen) and water. Hydrogen is used to scrub the atmosphere with
Sabatier process as in the ISS. This dramatically reduces payload.
Advanced electronics are far lighter and more capable and less power
hungry. Advanced TPS is lighter. Advanced recovery systems.
Advanced lightweight materials developed for X-33 and SSTO program.
etc., etc., etc.
Mars flight is provisioned for 1 astronaut with reprovisioning air and
water on Mars
Apollo CM reference
Crew Size: 3. Length: 3.47 m (11.38 ft). Basic Diameter: 3.90 m (12.70
ft). Maximum Diameter: 3.90 m (12.70 ft). Habitable Volume: 6.17 m3.
Mass: 5,806 kg (12,800 lb). Structure Mass: 1,567 kg (3,454 lb). Heat
Shield Mass: 848 kg (1,869 lb). Reaction Control System: 400 kg (880
lb). Recovery Equipment: 245 kg (540 lb). Navigation Equipment: 505 kg
(1,113 lb). Telemetry Equipment: 200 kg (440 lb). Electrical
Equipment: 700 kg (1,540 lb). Communications Systems: 100 kg (220 lb).
Crew Seats and Provisions: 550 kg (1,210 lb). Crew mass: 216 kg (476
lb). Miscellaneous Contingency: 200 kg (440 lb). Environmental Control
System: 200 kg (440 lb). RCS Coarse No x Thrust: 12 x 410 N. RCS
Propellants: N2O4/UDMH. RCS Isp: 290 sec. RCS Impulse: 257 kgf-sec.
Main Engine Propellants: n/a. Main Engine Propellants: 75 kg (165 lb).
L/D Hypersonic: 0.30. Electrical System: Batteries. Electric System:
20.00 kWh. Battery: 1,000.00 Ah.
A reusable liquid booster makes the most good sense, even if it's not
of the Mook LH2/LOx format.
~ BG
.
- References:
- Ariane Liquid Booster
- From: Willie . Mookie
- Ariane Liquid Booster
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