the Heller Ariane 5 kit
This page is a work in progress
Notes on the Heller Ariane 5
The Heller kit (nr. 60441) is for an Ariane 5G. Heller also produced the 'Mission Jules Verne' kit (52909), which contains an Ariane 5 ES ATV. This has a new (more detailed) EPS upper stage, and a payload fairing with interior detail. These parts allow you to build an Ariane with its payload on display.
The kit dimensions are accurate. There are a few differences between the kit and photos I've seen of the Ariane 5. These are mostly a matter of paint colors.
- Step 1: the engine must be aluminium, Humbrol 11, including part 4.
- Step 2: part 2, 3, 4 must be aluminium, Humbrol 11.
- Step 4: the tank, part 6 must be aluminium, Humbrol 11.
- Step 5: the tank, part 7 must be aluminium, Humbrol 11, or metal foil (it's wrapped in silver insulation blanket).
- Step 6: the tank base, part 9 must be white, Humbrol 22.
- Step 13: part 22 must be natural metal (Humbrol 11), and you must install 2x part 22 on each solid booster. There are 2 locating notches on the nozzle.
- Step 9: On the EPS stage integrated in part 13, the covers on the reaction control system are incomplete: to make sure the part can be released from the mould, these covers have been cut off. The covers should be symmetrical.
Converting the Heller Ariane 5 to an ECA version
These are the main differences between the Ariane 5 and the ECA:
- The insulation tiles on the first stage (EPC) and second stage (ESC-A) are light blue instead of beige.
- The first stage has a new engine, the Vulcain II. The main visible difference is the turbopump exhausts (part 2 and 3): on the Vulcain 2 the exhausts are connected to a ring on the nozzle, the exhaust is vented through the nozzle to provide film cooling of the nozzle walls.
- On the first stage engine, step 5 of the instructions indicates 2 copies of part 7+8 (high-pressure helium tanks). This is correct for the 5G, but the ECA only has 1 tank here.
- The EPS stage integrated in part 13 is replaced with a new second stage (the ESC-A).
- On the 5 G, the solid boosters (EAP-241) consist of 7 segments. The joints (visible as thicker bands on the model) are bronze (I think this is a metal hoop around the joint). On the 5 ECA, a new booster was instroduced, the EAP-241A. Most of the booster segments (EAP-241A) are joined in the factory, and the boosters are shipped in 3 parts, so 3 field joints remain. The thicker sections are still there, the factory joints are painted white.
- On the EAP-241, there are 2 hydraulic tanks (part 20) at the base of each booster. On the EAP-241A, this is replaced by a single, larger tank.
- On the EAP-241, there are different connectors at the top of the booster.
Ariane 5 ECA evolution
The Ariane 5 ECA configuration as described above was introduced gradually. This section lists the changes by mission:
- The first ECA missions used the old EAP-241 boosters and beige insulation:
Missions V-157, 164, 167, 170-173, 175.
- Then an interim configuration using EAP-241 and blue insulation:
Missions V-182, 184-186, 189.
- And the final configuration with EAP 241A and blue insulation:
Mission V-174, 176, 177, 179, 183, 187, 188, 190 and all later flights.
I created this list by checking photos of each launch I found on capcomespace.net (a good source for all things Ariane).