Talk:General Electric F414

Aug 09 Work

I've started a sandbox here to start reworking this article. Please use this discussion page, or my discussion page, to make any suggestions you see fit. SidewinderX (talk) 18:09, 11 August 2009 (UTC)

If you can fill some early development content, that'll be great. I have only been to find more recent info on engine upgrades. -Fnlayson (talk) 03:07, 13 August 2009 (UTC)

Ok, I've updated the main page with my sandbox version. I've cited a lot more, added a lot of detail to the variants section, rewrote the development section some, and fixed the info box up a bit. I guess I'd like comments and any improvments anyone can offer, than have it checked against the B-class checklist. Fnlayson: I haven't been able to find too much on the early development process. I'll keep looking. - SidewinderX (talk) 00:04, 14 August 2009 (UTC)

Thanks. You're doing fine. I can probably pull some early info from my F/A-18 books. -Fnlayson (talk) 02:17, 14 August 2009 (UTC)

I got a bit motivated and found several good AvWeek articles from early in the F414 development years (1991-1995 mostly) that have a lot of good information. I'll try and synthesize that stuff and add it to the article tomorrowish. - SidewinderX (talk) 03:49, 14 August 2009 (UTC)

What are 'fluidic chevrons'?! Can we clarify this term for the readers (including me)?! Cheers Nimbus (Cumulus nimbus floats by) 16:56, 3 September 2009 (UTC)

Word repetition here: 'low risk derivative of the F404, rather than a riskier new engine', I'm trying to think of alternatives; completely new engine, bold new engine, unknown new engine etc.? Nimbus (Cumulus nimbus floats by) 17:52, 3 September 2009 (UTC)

• "... rather than a new engine design" maybe add completely, clean sheet or other term in there. The fluidic chevrons is related to noise reduction. The mechanical chevrons are like the sawtooth edge on the nozzles of some newer airliner engines. This AIAA paper has some info on the mechanical features. -Fnlayson (talk) 18:06, 3 September 2009 (UTC)

WRT: Fluidic Chevrons: I added an extra line here, does that help explain them a bit? It's an advanced topic I know (and I haven't found a spot in Wikipedia that talks about it), but I figured it was worth mentioning at least. WRT: New engine: How about 'low risk derivative of the F404, rather than a more complex new engine'? I guess a new engine wouldn't have to be more complex, but it would require all new parts, tooling, and study... - SidewinderX (talk) 18:10, 3 September 2009 (UTC)

Are the 'chevrons' the exhaust nozzle petals? I still don't understand!!!! Nimbus (Cumulus nimbus floats by) 18:13, 3 September 2009 (UTC)

Mechanical chevrons are cut out tabs (http://www.nasa.gov/images/content/365835main_airplane_noise_qtd2_3024x2016.jpg) that help mix the hot fast air with cooler slower air to reduce jet noise. Fluidic chevrons work (or are supposed to work) by inducing that mixing with differential fluid flows. I included that info in the article to mention what is still being worked on for the engine... unfortunately wikipedia doesn't have a good link (that I've found) that discusses it to include. I think it's useful to have in there to show what is being done, but I understand the concern about it being an advanced technical topic. What do you think I should do? -SidewinderX (talk) 18:23, 3 September 2009 (UTC)

The picture helps a lot, new version of the old 'pineapple' noise supressors seen on 707s and 727s etc. We've got Aeroacoustics, good luck! I hate those articles, shouldn't be allowed. We have fluidics as well, a fluid in the case of this article means the exhaust gases at a stab! There is propelling nozzle as well but you will have trouble putting anything legitimate in there without getting reverted. Nimbus (Cumulus nimbus floats by) 18:46, 3 September 2009 (UTC)

Just found Hush kit, a whole article could be merged/created using parts of the earlier mentioned articles, Jet engine noise supression? Nimbus (Cumulus nimbus floats by) 00:45, 4 September 2009 (UTC)

I was even thinking that we could just use the Jet Noise or Aircraft Noise article and have a significant section about noise reduction techniques. That's a huge field right now with International "Stage 4" noise limitations coming into play. (Stage 3 is what current aircraft have to meet, and stage 4 is about 10dB lower) -SidewinderX (talk) 01:27, 4 September 2009 (UTC)

• Lower case those cap Ns: Jet noise & Aircraft noise -Fnlayson (talk) 04:26, 4 September 2009 (UTC)

(undent) I've expanded that line into a larger paragraph, trying to better explain what those terms are. On the downside, this might be bordering original research... I'm just trying to strike the balance between OR and explaination. I'd like to get this article up "B" class (it would be our 20th B class article in the AETF). Is this enough to get it up to B, or do I need to pursue another solution? -SidewinderX (talk) 19:56, 10 September 2009 (UTC)

Any updates

I have not seen any media articles on Enhanced Durability Engine/Enhanced Performance Engine versions in the past several months. Has anyone seen any media articles ore press releases on these or other F414 updates? The EDE/EPE versions would seem to the basis for the F414-INS6 version for India's Tejas jet. Thanks. -fnlayson (talk) 18:40, 26 October 2010 (UTC)

Here's one: "General Electric primes CMC for turbine blades". An F414 engine used Ceramic Matrix Composite (CMC) blades during testing earlier in Nov. CMCs can handle higher temperatures and have a lower density than comparable metals. -fnlayson (talk) 23:16, 29 November 2010 (UTC)