Questions tagged [accessory-drives]
The mechanisms by which aircraft engines power ancillary engine equipment, such as the engine-driven generators and oil and hydraulic pumps.
5 questions
5
votes
1
answer
143
views
How is a constant speed of the Engine driven hydraulic pumps maintained (or isn’t it)?
As the N2 rotation speed varies, the accessory gearbox speed also varies and some components like the generators need the constant speed drive (CSD) to maintain the needed speed (unless variable ...
- 131
7
votes
1
answer
1k
views
Why are the 737's variable-speed generator drives so unreliable?
The 737 Classic has two different possible styles of engine-driven generators, distinguished by the generator's drive mechanism: the constant-speed drive (CSD) and the variable-speed constant-...
- 28.6k
0
votes
0
answers
279
views
Where can PT-6 engine series starter-Generator diagrams be found?
Wondering if anyone can direct me to the spec sheet, diagrams, and breakdowns of a typical Starter-Generator for a PT-6, say a PT6-66 series or similar. And also who are the major manufacturers of ...
- 528
10
votes
2
answers
23k
views
What is an accessory gearbox?
Many 737 engines have an accessory gearbox on the 9'o clock position, which is part of why the engine has a flat-bottomed shape. What exactly is an accessory gearbox?
- 11.5k
6
votes
2
answers
14k
views
What is the different between an aircraft engine gearbox and an aircraft engine transmission?
For an aircraft engine, what is the difference between a gearbox and a transmission?
I was of the understanding that a transmission is a type of gearbox. For example, in a helicopter, a transmission ...
- 61