User talk:Pieter1963CompressorHi Amclaussen, Centrifugal stages are widely used on todays smaller aircraft engines both on their own and as a final stage after some axial stages. Perhaps mention could be made in the article (unless the title is changed to Axial Compressor Map)that the maps shown also apply in general form to other turbomachinery configurations like centrifugal stages, mixed axial/centrifugal (ie anything in between the two extremes), overall maps for combined axial and centrifugal (as mentioned above, I have one in front of me as I write), turbocharger impellers. Also, as you point out, mention could be made that the surge mechanism (as best understood today) is basically similar for both axial and radial turbomachines, except that for c/f stages the situation is more involved because one or both of the two main components (impeller and diffuser) may stall individually or simultaneously. A reference should be given here both to confirm the source of the info and to allow follow-up study, so ref 'Rotating Stall and Surge Control: A Survey by Bram de Jager'. If I can take the liberty of answering your question... Isentropic (or adiabatic) efficiency appears to be the norm for compressor maps if you look at any compressor test results available on-line or in books, eg 'Axial Compressor Development at Rolls-Royce Derby, 1946-1962' by A. McKenzie. The author of the article does say ' some maps use polytropic efficiency' so that allows the learner to follow up the distinction easily on line. Pieter1963 (talk) 01:14, 24 December 2012 (UTC) Welcome
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On second thoughts, deleting these three titles is undesirable because each one is legitimate and suitably described in a major article (Compressor map?) Instead, the appropriate course of action is to convert each of these three to a redirect. I propose:
Do you have any comments or suggestions before I go ahead? Dolphin (t) 13:27, 19 August 2021 (UTC)
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Lockheed JetStar's pivoting tailHi Pieter. In this edit at Vertical stabilizer#Pivoting tail you described the Lockheed JetStar's pivoting tail and wrote "The fin pivots about its rear spar to provide longitudinal trim." If the fin pivoted about its rear spar it would provide directional trim, not longitudinal trim. Perhaps what is meant is "The fin pivots about the rear spar of the horizontal stabilizer to provide longitudinal trim." Could you clarify this sentence? The Mooney M20 uses an identical arrangement, as described at Mooney M20#Design, where it says “The entire tail assembly pivots at the rear of the fuselage to provide pitch trim.” These words might provide greater clarify in your paragraph about the JetStar. Dolphin (t) 13:01, 2 October 2021 (UTC) Thank you for your feedback. Over the last 40 years I have saved a few articles from various magazines including Flight. I never thought their archive would one day no longer be available, only temporary I hope. It just so happens I have one on the Jetstar with a cutaway. It enables a bit more precision than rear of fuselage fortunately.Pieter1963 (talk) 19:09, 3 October 2021 (UTC)
ArbCom 2021 Elections voter messageEditing only the lead in an articleFurther to my reply to you today at Talk:Swept wing: To be able to edit only the lead of an article (as opposed to having to select the entire article) I recommend you avail yourself of the relevant option. This is done by selecting the Preferences tab at the top of your screen. Then select Gadgets from the grey option bar. Then scroll down to Appearance. The first option box says “Add an edit link for the lead section of a page.” Tick that box, then scroll down until you see the Save button, and press. Now when you view any article you will see an “edit” option alongside the title of the article. If you click on it, an edit box will open and it will contain the text of the lead only, not the text of the entire article. In the case of the article Swept wing it should allow you to edit without being troubled by the template warning. Dolphin (t) 00:23, 1 February 2022 (UTC)
Discussion on Propelling NozzleHello Pieter, I've seen you handle large part of editing in the "Propelling Nozzle" page. I think a brief discussion on automatic control of variable geometry nozzles should be included. Could you give me your opinion on the topic? Kind regards — Preceding unsigned comment added by UASLab (talk • contribs) 21:57, 2 March 2022 (UTC)
ArbCom 2022 Elections voter messageHello! Voting in the 2022 Arbitration Committee elections is now open until 23:59 (UTC) on Monday, 12 December 2022. All eligible users are allowed to vote. Users with alternate accounts may only vote once. The Arbitration Committee is the panel of editors responsible for conducting the Wikipedia arbitration process. It has the authority to impose binding solutions to disputes between editors, primarily for serious conduct disputes the community has been unable to resolve. This includes the authority to impose site bans, topic bans, editing restrictions, and other measures needed to maintain our editing environment. The arbitration policy describes the Committee's roles and responsibilities in greater detail. If you wish to participate in the 2022 election, please review the candidates and submit your choices on the voting page. If you no longer wish to receive these messages, you may add ArbCom 2023 Elections voter messageHello! Voting in the 2023 Arbitration Committee elections is now open until 23:59 (UTC) on Monday, 11 December 2023. All eligible users are allowed to vote. Users with alternate accounts may only vote once. The Arbitration Committee is the panel of editors responsible for conducting the Wikipedia arbitration process. It has the authority to impose binding solutions to disputes between editors, primarily for serious conduct disputes the community has been unable to resolve. This includes the authority to impose site bans, topic bans, editing restrictions, and other measures needed to maintain our editing environment. The arbitration policy describes the Committee's roles and responsibilities in greater detail. If you wish to participate in the 2023 election, please review the candidates and submit your choices on the voting page. If you no longer wish to receive these messages, you may add Disambiguation link notification for September 20An automated process has detected that when you recently edited Lockheed SR-71 Blackbird, you added a link pointing to the disambiguation page A-12. (Opt-out instructions.) --DPL bot (talk) 07:54, 20 September 2024 (UTC) ArbCom 2024 Elections voter messageHello! Voting in the 2024 Arbitration Committee elections is now open until 23:59 (UTC) on Monday, 2 December 2024. All eligible users are allowed to vote. Users with alternate accounts may only vote once. The Arbitration Committee is the panel of editors responsible for conducting the Wikipedia arbitration process. It has the authority to impose binding solutions to disputes between editors, primarily for serious conduct disputes the community has been unable to resolve. This includes the authority to impose site bans, topic bans, editing restrictions, and other measures needed to maintain our editing environment. The arbitration policy describes the Committee's roles and responsibilities in greater detail. If you wish to participate in the 2024 election, please review the candidates and submit your choices on the voting page. If you no longer wish to receive these messages, you may add Wind tunnelThanks for taking an interest in our article on the Wind tunnel. It is not well written and deserves a lot of fine tuning. The first of your two edits was to the section titled How it works. To explain how a family of machines, including wind tunnels, work the text should focus on operating principles, common characteristics and universal features. Your edit amended the first paragraph to insert details of one atypical wind tunnel (a 24 x 36 tunnel in the USA.) I don’t think this is appropriate in the section focussing on how the wind tunnel works, and certainly not in the first paragraph. Could you re-visit your work on this article and do some refining? Thank you. Dolphin (t) 23:50, 5 December 2024 (UTC)
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