Talk:Peugeot 8Aa

Naming conventions

The French military's name for this engine was Peugeot 8Aa. "8" for the cylinder arrangement. "A" as it's the first series of Peugeot aero engines. "a" as it's the first variant ... though as it's also the only variant this last letter is sometimes dropped in publications.

Peugeot's designation for the engine was L112.

The engine is often known in publications by its nominal rating which can be given as anywhere between 180-230 hp. This practice often makes identifying French aero-engines difficult, but not in this case as there was only one model in one variant with one application (The Voisin VIII).Stivushka (talk) 15:01, 18 February 2024 (UTC)

Feedback from New Page Review process

I left the following feedback for the creator/future reviewers while reviewing this article: Good day! Thank you for contributing to Wikipedia by writing this article. I have marked the article as reviewed. Have a wonderful and blessed day for you and your family!

✠ SunDawn ✠ (contact) 08:24, 10 April 2024 (UTC)

GA Review

The following discussion is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.

---

This review is transcluded from Talk:Peugeot 8Aa/GA1. The edit link for this section can be used to add comments to the review.

Nominator: Stivushka (talk · contribs) 21:07, 17 October 2024 (UTC)

Reviewer: Chiswick Chap (talk · contribs) 12:30, 27 October 2024 (UTC)

Comments

• 200 hp: it might be helpful to note (could be an aside or a footnote) that the first Rolls-Royce Merlin engine, in 1933, was 1000 hp, to put this into context for readers. With a ref, of course.
  • Added note that the 1914 Voisin L (the first of the Voisin pusher series) had an engine of only 80 hp. I think is the best illustration as it shows how far the French government were pushing the technical envelope.
    • That's fine, but the note needs to be cited.

• Double overhead camshafts: for the general reader, could you briefly note why this complex arrangement was advantageous?
  • Done with cite

• And why 2 sparkplugs per cylinder?
  • Done with cite

• A partially cutaway Peugeot 8Aa is on display at the Musée de l'air et de l'espace. - This is the one illustrated at the top of the article? If so, it would be nice to combine the text with the caption.
  • Picture is from the Musée de l'air et de l'espace caption now reflects this. Used the English translation of the museums name consistently accross article to avoid confusion.

• on display in Kraków: should really be cited.
  • Done

Images

• Images are all on Commons and plausibly licensed.

• The timing diagram has a pleasantly old-fashioned engineering look in keeping with its subject. It could certainly be redrawn in color and labelled in a more modern way as an SVG.
  • Prefer to keep this as it's from the original Sherbody 1920 book and goes nicely with the other drawing which are of a similar vintage.

• It would make sense to illustrate the Voisin VIII aircraft here as the only installation of the engine, if you felt that to be appropriate. The image caption could describe the short operational life of the aircraft (with dates) and the reason for that.
  • Done

• It would be desirable to have a discussion of the engine's poor reliability in one place ('Reliability issues', or something similar) rather than the two scattered mentions at present.
  • Done

• It would be desirable for the reliability section to address the reasons for the ignition and lubrication faults.
  • Sources just report that there were complaints but there is no evidence in sources for anything like a root cause analysis. The only issue that was "researched" was the carburetor freezing which I will add in the section addressing engine reliability.

• It does feel from the existing account that the 8Aa was rather too 'clever' an engine with a more complex design than some of its rivals, would that be right? It would be interesting to have some discussion of that sort of thing.
  • The sources don't really support this conclusion (though I suspect it is the case). It seems the Renault Fs ended up as a better engines because they had an inherently better method of heating the carburetor.

• The 8Ae's replacement, the contemporaneous (1915) Renault 12Fe was a 300 hp engine, i.e. 50% more powerful than the 8Aa, and "particularly durable". It would be worth comparing the two engines (and their makers?) if there is a suitable source for this. Not sure why the 'Comparable engines' list doesn't mention the Renault, specially as it took over from the Peugeot.
  • Done

Sources

• Is Poillot 1990 (in 'Operational history') the only available discussion of the engine's reliability issues with lubrication and ignition? Pinto 1981 mentions low temperature as a cause of carburetor issues (in 'Design and development'). This is the most salient feature of the article, so it would be desirable to have more than one point of view.
  • Done

• The online sources are verified. I'll AGF the offline sources.

Summary

OK, there's very little wrong with this article, and I hope to see it at GA very soon. The points I've mentioned above are basically very minor, but perhaps of some value. Chiswick Chap (talk) 16:16, 27 October 2024 (UTC)

The discussion above is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.