User talk:Quatschman

License tagging for File:Goadbychurch.jpg.JPG
Thanks for uploading File:Goadbychurch.jpg.JPG. You don't seem to have indicated the license status of the image. Wikipedia uses a set of image copyright tags to indicate this information; to add a tag to the image, select the appropriate tag from this list, click on this link, then click "Edit this page" and add the tag to the image's description. If there doesn't seem to be a suitable tag, the image is probably not appropriate for use on Wikipedia.

For help in choosing the correct tag, or for any other questions, leave a message on Media copyright questions. Thank you for your cooperation. --ImageTaggingBot (talk) 18:05, 3 January 2009 (UTC)

Proposed deletion of Failure monopoly


The article Failure monopoly has been proposed for deletion&#32; because of the following concern:
 * Does not appear to be a legitimate term of art. See wp:NEO for more about neologisms.

While all contributions to Wikipedia are appreciated, content or articles may be deleted for any of several reasons.

You may prevent the proposed deletion by removing the  notice, but please explain why in your edit summary or on the article's talk page.

Please consider improving the article to address the issues raised. Removing  will stop the proposed deletion process, but other deletion processes exist. The speedy deletion process can result in deletion without discussion, and articles for deletion allows discussion to reach consensus for deletion. ErikHaugen (talk) 17:10, 28 July 2010 (UTC)
 * Please see the discussion page here: Talk:Failure_monopoly. Also, please assume good faith and do not speculate about my ideologies or whether they motivate me to delete pages. ErikHaugen (talk) 17:04, 30 July 2010 (UTC)
 * I have initiated the articles for deletion process for this article, please weigh in at: wp:Articles_for_deletion/Failure_monopoly. thanks, ErikHaugen (talk) 00:26, 5 August 2010 (UTC)

Speedy deletion nomination of File:Goadbychurchinsnow.jpg


A tag has been placed on File:Goadbychurchinsnow.jpg requesting that it be speedily deleted from Wikipedia. This has been done under section F1 of the criteria for speedy deletion, because the image is an unused redundant copy (all pixels the same or scaled down) of an image in the same file format, which is on Wikipedia (not on Commons), and all inward links have been updated.

If you think that this notice was placed here in error, contest the deletion by clicking on the button labelled "Click here to contest this speedy deletion". Doing so will take you to the talk page where you will find a pre-formatted place for you to explain why you believe the page should not be deleted. You can also visit the the page's talk page directly to give your reasons, but be aware that once tagged for speedy deletion, if the page meets the criterion, it may be deleted without delay. Please do not remove the speedy deletion tag yourself, but don't hesitate to add information to the page that would render it more in conformance with Wikipedia's policies and guidelines.  S ven M anguard  Wha?  13:39, 10 October 2011 (UTC)

File:Goadby Church, (Winter 2009).jpg needs authorship information.
Dear uploader:

The media file you uploaded as File:Goadby Church, (Winter 2009).jpg appears to be missing information as to its authorship (and or source), or if you did provide such information, it is confusing for others trying to make use of the image.

It would be appreciated if you would consider updating the file description page, to make the authorship of the media clearer.

Although some images may not need author information in obvious cases, (such where an applicable source is provided),authorship information aids users of the image, and helps ensure that appropriate credit is given (a requirement of some licenses).


 * If you created this media yourself, please consider explicitly including your user name, for which: will produce an appropriate expansion, or use the own template.


 * If this is an old image, for which the authorship is unknown or impossible to determine, please indicate this on the file description page.

If you have any questions please see Help:Image page. Thank you. Sfan00 IMG (talk) 11:11, 13 October 2011 (UTC)

File:Goadby Church, (Winter 2009).jpg missing description details
Dear uploader: The media file you uploaded as: is missing a description and/or other details on its image description page. If possible, please add this information. This will help other editors make better use of the image, and it will be more informative to readers.
 * File:Goadby Church, (Winter 2009).jpg

If the information is not provided, the image may eventually be proposed for deletion, a situation which is not desirable, and which can easily be avoided.

If you have any questions, please see Help:Image page. Thank you. Theo's Little Bot (error?) 00:50, 13 April 2013 (UTC)

ArbCom elections are now open!
MediaWiki message delivery (talk) 16:33, 23 November 2015 (UTC)

Maximum takeoff weight
Hello Quatschman. Thank you for taking an interest in our article Maximum takeoff weight. In your edit on 30 December you added some information related to the maximum weight permitted for takeoff. (See your diff.)

Your edit added the suggestion that ambient pressure and temperature affect the lift that an aircraft’s control surfaces can generate during a takeoff. (You did not cite a source for your information.) In fact, your suggestion is incorrect. I can explain why the maximum lift generated by an airfoil, and the maximum rolling moment generated by the ailerons etc. is unaffected by air density, even though this is contrary to what we first expect.

As you know, the lift being generated by an airfoil determines the instantaneous lift coefficient CL. The lift generated at lift coefficient CL can be summarised as follows:
 * $$L = \tfrac12 \rho V_T^2 A C_L$$

where ρ is the air density, VT is the true airspeed, and A is the area of the airfoil.

Similarly, if takeoff is always performed at the same lift coefficient regardless of weight, the lift generated at takeoff is always associated with the same lift coefficient, CLto.

At first glance it certainly looks as though air density plays an important part in determining the lift generated at a given lift coefficient CL. However, an aircraft at a particular weight doesn’t always takeoff at the same true airspeed; it takes off at the same indicated airspeed (or, if you prefer, the same equivalent airspeed.) Indicated airspeed (and equivalent airspeed) are read off the airspeed indicator which is calibrated for standard air density ρ0 (density at sea level and 15°C.)
 * Indicated airspeed $$V_I = V_T \sqrt \frac{\rho}{\rho_0}$$
 * and therefore $$\rho_0 V_I^2 = \rho V_T^2$$

Re-writing the lift equation using standard air density ρ0 and indicated airspeed VI
 * $$L = \tfrac12 \rho_0 V_I^2 A C_L$$

Expressed in this way, we can see that ambient air density ρ plays no part in determining the lift on the airfoil at CL or the rolling moment generated by the ailerons. As the air density decreases with altitude or temperature, the true airspeed of the aircraft increases to compensate because there is no change in the indicated airspeed. This is one of the advantages of equipping aircraft with airspeed indicators that show indicated airspeed rather than true airspeed.

Unfortunately the same is not true for the kinds of engine used in conventional aeroplanes. As the air density decreases with altitude or temperature, these engines lose power or thrust and it isn’t possible to compensate by flying faster. The power or thrust generated by an engine at a particular throttle setting is strongly affected by ambient pressure and temperature but it is hardly affected at all by true airspeed.

I will revert your recent edit but if you wish to discuss the subject with other Users interested in this article please start a discussion on the Talk page. Happy editing! Dolphin ( t ) 03:38, 31 December 2015 (UTC)