Advance Ariane 5 studies from 1990s

Michel Van

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ESA made in beginn 1990 several study for advance Ariane 5 rocket, what let to big Ariane super lourd concept 1991

also they study this interesting Idea
Ariane 5 with TWO Vulcain (HM60) engines with each 800 kN thrust and 220 tons fuel in EPC

The Idea behind the concept is this Problem:
after the solid booster are drop, the acceleration falls 1.18G from to 0.74 G!
This is because Vulcan 1 has thrust of only 1145 kN (vac) lower as rest mass of rocket.
that fault founds in the original design of Ariane 5 who had much lower Payload. but Hermes became heavy, so HM60 replace by Vulcain 1 and they accepted gravity drag temporary.
what let to the R&D on Vulcain 2 engine for Ariane 5 ECA

Back to Ariane 5 with 2x Vulcain (HM60) engines and 1600 kN thrust what reduce the gravity drag, also the wished thrust for R&D on future Vulcain 3
The source tell about EPC 210 stage, that's 50t more fuel as EPC155 would make the EPC210 - 38 meter high.
but this problematic for the EAP Solid Booster with 31 meter length to fit on ECP210

Source:
Flug Revue Nr 9 September 1993 page 56

Got some one more Info on this Ariane 5 version ?
 

Michel Van

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i made more calculation on Ariane 5 with 2 x Vulcain (HM60)
the EPC must use super cooled fuel (LOX at 1,24 and LH2 at 0,076 gr/cubic centimeter)
what reduce the high of ECP210 to 32 meters compare to standard ECP with 31 meters

The scann picture show Models of Ariane 5, left the Two engine version right the Super lourd concept
behind are two standard Ariane 5 with payload Fairing in diverse length (12 and 17 meter)?

The small rocket in middel is DAL or ALD
Dérivé Léger d'Ariane/Ariane Light Design for low cost launcher for medium payloads by french CNES.
Build from Solid Boosters the EAP 230 as first stage, second P85 is short version of EAP and P30 or H10 as third stage. also it use Ariane 4 payload Fairing.
if all tree stages are Solid, a fourth stage L6 (similar to Ariane 5 EPS stage) is used.
DAL-S 3500kg into Sun-synchronous orbit of 800 km
DAL-P 1000 kg into 1000km high orbit, use only P85 and P30 and L6 sound familiar ? that's almost VEGA launch rocket
by the way the DAL had to launch french Military satellite

in 1993 ESA look themselves on medium launch rocket ELS: European Small Launcher
they wanted R&D new Solid booster P50 and P7 and use them on EAP 230 or P50 as first stage
1000 kg in Sun-synchronous orbit of 700 km P50/P50/P7
3500 kg in Sun-synchronous orbit of 700 km P230/P50/P7

in 1998 ESA study the combination EAP230 with VEGA as upper stages.

But in end ESA management not take the proposals, instead they went in Join venture with Russia Soyuz rocket launch from Kourou
the major reason was France need to launch Military satellite in Sun-synchronous orbit, who were to heavy for VEGA.

During "Ariane 2010" study the concept again as "Half Ariane 5 Soild"
a EAP 260 booster (extends 2 more Segment) as First stage, second stage a EAP 130 single segment, Thrid stage cryogen stage.
and Ariane 5 short payload Fairing.
Payload 5,5~6 tons into GTO

also study under Next Genration Launcher was the BBPH Building Block: Powder Hydrogene
First stage: a advance EAP with 250 tons fuel, Second stage: advance P80 80~100 tons fuel, third stage H28 with Vinci engine
Payload 3 tons in GTO
with use of P23 soild stap on Booster 5 tons inGTO with 2 P23, 8t in GTO with 6Xp23 booster

Picture source
Flug Revue Nr 9 September 1993 page 56

Source On DLA, ELS, HAS and BBPH and P230/Vega
Europäische Trägerraketen Band 2 by Bernd Leitenberger ISBN-13: 978-3-8391-0165-0
 

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Hobbes

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I've checked "Europe's space programme" (by Brian Harvey), but this has no info on advanced Ariane 5 concepts from the 1990s.
 

Michel Van

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Hobbes said:
I've checked "Europe's space programme" (by Brian Harvey), but this has no info on advanced Ariane 5 concepts from the 1990s.

There not much information about them
i lock true allot Flug Revue magazine until i found two picture with info

here the Ariane super lourd concept aka ESA moon rocket.
1874 ton launch weight.
it use 4 EAP230 booster
second stage is almost Shuttle ET size: the H620 with five Vulcain engine
The third stage is shorten EPC stage called H70 with one Vulicain engine
this rocket is capable to launch 35 tons to moon from GTO
Payload in LEO would be around 90 tons

Source Picture:
Flug Revue

Source: data
Europäische Trägerraketen Band 2 by Bernd Leitenberger ISBN-13: 978-3-8391-0165-0
 

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XP67_Moonbat

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You know it's funny. I was on NASA Spaceflight Forum the other night, and I swear I saw a similar vehicle in the the thread about future Chinese HLVs.

Check out Response 101:
http://forum.nasaspaceflight.com/index.php?topic=8447.90
 

Michel Van

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XP67_Moonbat said:
You know it's funny. I was on NASA Spaceflight Forum the other night, and I swear I saw a similar vehicle in the the thread about future Chinese HLVs.

Check out Response 101:
http://forum.nasaspaceflight.com/index.php?topic=8447.90


beware of foreign exchange student, who make tons of photocopy, use the Fax machine for hour's
and send giga byte big Emails to home...
 
R

RGClark

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Michel Van said:
ESA made in beginn 1990 several study for advance Ariane 5 rocket, what let to big Ariane super lourd concept 1991
also they study this interesting Idea
Ariane 5 with TWO Vulcain (HM60) engines with each 800 kN thrust and 220 tons fuel in EPC
...

Thanks for that. Such paired Vulcain's could launch the smaller Ariane 5 "G" core stage at 158 mT propellant load as an SSTO.
For the later Ariane 5 "E" version at 170 mT propellant load you would need three Vulcains for the SSTO, and this would also suffice for the 220 mT load version you mention.

c.f.,

A low cost, all European, manned launcher.
« on: March 09, 2012, 07:14:49 pm »
http://www.secretprojects.co.uk/forum/index.php/topic,14692.msg146544.html#msg146544
 

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