Greetings, anyone have data in regards to the longevity of a Williams WR24-7? I do not have a manual and operating data is seems to be pretty ambiguous on the internet. From what I've gathered, it's a very life limited motor. I still haven't seen a scenario where either the aft roller or fwd ball bearing failed in past internet archives.
Also noted; if anyone has been curious on the compatibility of WR27 & WR24 components, the ignition system components are the only interchangeable parts I've found. Bearings and rotating components are very much different in dimensions. I'll try to put together a detailed investigation for the thread if there's interest.
Last Edit: Sept 24, 2023 20:47:02 GMT -5 by jetkart
I don't see a reason why the WR24 series of engines would be time limited. Some may relate this to their applications that may result in frequent total losses. But the manufacturer even specifies a purge procedure to recover engines that had gone down over salt water...
None of the manuals lists a time or cycle limit (which probably isn't correct -- all engines contain components that have a finite life); apparently all the stuff is "on condition", which may deteriorate faster than a fixed limit would be reached. Anyway, having torn down (and reassembled) several of these engines, I wouldn't say that there are components that are "per-se" more prone to failures than on APUs or prime movers. Also the figures regarding operating temperatures and general stress levels (as per the manuals) are no more severe than on other engines. Machining quality of the engine components and material choice is first class without any doubt, just as I'm used to find on most western-made "serious" turbine engines.
I uploaded my collection of documents on the WR24-7-* engine to easyupload; it will be available there for seven days, so if you'ld like to download it, don't wait too long: easyupload.io/vng709
Much like turbotom noted, WR 2x engines were typically installed in launch vehicles that would normally be viewed as entirely expendable in military terms so far as long-term reliability was concerned. Personally I rather like their design for compactness compared to a more traditional axial unit, and recalling from memory (subject to recollection accuracy ), the design was an offshoot of the Chrysler Turbine Car project. That doesn't mean they aren't well made to aerospace standards, as there are quite a few surplus survivors out there, but in relation to design principle, it was essentially a one-time use case and not an engine that was expected to be overhauled in regular intervals.