From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 X-Received: by 2002:a05:600c:24d2:: with SMTP id 18mr17808419wmu.117.1557155580181; Mon, 06 May 2019 08:13:00 -0700 (PDT) Path: eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!news.gegeweb.eu!gegeweb.org!usenet-fr.net!proxad.net!feeder1-2.proxad.net!209.85.128.88.MISMATCH!z190no10209860wmc.0!news-out.google.com!z192ni15835wmc.0!nntp.google.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!buffer1.nntp.dca1.giganews.com!news.giganews.com.POSTED!not-for-mail NNTP-Posting-Date: Mon, 06 May 2019 10:12:55 -0500 From: Dennis Lee Bieber Newsgroups: comp.lang.ada Subject: Re: Boeing 737 and 737 MAX software Date: Mon, 06 May 2019 11:12:55 -0400 Organization: IISS Elusive Unicorn Message-ID: <0dj0dehueljdai9qm209pgglmfri74ki5h@4ax.com> References: <8736mwi257.fsf@nightsong.com> <9e6ba244-5e55-4068-bd78-6e797bf8f2ac@googlegroups.com> <3290acac-675c-4d55-84e3-5c153357893c@googlegroups.com> User-Agent: ForteAgent/8.00.32.1272 X-No-Archive: YES MIME-Version: 1.0 X-Usenet-Provider: http://www.giganews.com X-Trace: sv3-AIl9doiTNNCQYPlgnoJi2awcRsze1B0/UNhNtTDvIq6QU1bO4L9wfnbRZC8esKSLTHkY++Kv+QJfiw9!c8T7B9T854NXPwkr9XJQOMF3ez4XI4/MdUTivS/4G+x++W1MR/VSF5StNesuTtxd7wF5dKS2 X-Complaints-To: abuse@giganews.com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 X-Original-Bytes: 2187 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Xref: reader01.eternal-september.org comp.lang.ada:56251 Date: 2019-05-06T11:12:55-04:00 List-Id: On Mon, 6 May 2019 06:54:41 -0700 (PDT), robin.vowels@gmail.com declaimed the following: >In offering the MAX to customers, Boeing claimed that no new training >was required. >That was a bare-faced lie. Boeing concealed the existence of >the stall software, and there was nothing about it in any of >the manuals issued to companies that bought the plane. > From a fairly detailed article I'd read, MCAS isn't even considered an anti-stall system. The primary purpose of MCAS was to compensate for the fact that the MAX engines are mounted further forward and higher than previous 737 series engines. This change was needed to obtain ground clearance with the larger engines. The position change also has a subtle effect in that they produce added lift in front of the wings at some angles of attack; this would have produced a tendency to increase a "nose-up" attitude. -- Wulfraed Dennis Lee Bieber AF6VN wlfraed@ix.netcom.com