Discussion
Arrange these buses in the order they entered aviation service:
1. ARINC 429
2. MIL-STD-1553 in civil derivative applications
3. ARINC 629
4. ARINC 664 avionics full duplex switched Ethernet
Select the correct sequence.
Answer: A
Correct answer: 1, 2, 3, 4
ARINC 429 came first, published in 1977 and still the most widely fitted civil bus. MIL-STD-1553, though dating from 1973 in military use, entered civil derivative applications afterwards.
ARINC 629 followed in the 1990s, notably on the Boeing 777, offering multiple transmitters without a controller. ARINC 664 part 7 came last, with the A380, taking commercial Ethernet and constraining it until its timing could be demonstrated. The sequence tracks a steady rise in bandwidth and in topological complexity.
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