X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=PbaBeRpd c=1 sm=1 tr=0 a=ox2L7D8zyEvnS2b4KBZd6Q==:117 a=Q/ga6ogm2rCWgcvzDGMIiA==:17 a=x7bEGLp0ZPQA:10 a=DDNF8ybvv5wA:10 a=y4yBn9ojGxQA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=7g1VtSJxAAAA:8 a=mIEldYFCSVE64zEU8igA:9 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=gSJrRJdiEkDdWrrXD3gA:9 a=vlOnPYYyQOPHSiyx:21 a=_W_S_7VecoQA:10 a=Urk15JJjZg1Xo0ryW_k8:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "Le Roux Breytenbach breytenbachleroux@gmail.com" Received: from mail-ej1-f50.google.com ([209.85.218.50] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 600663 for flyrotary@lancaironline.net; Mon, 03 Aug 2020 16:02:46 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.218.50; envelope-from=breytenbachleroux@gmail.com Received: by mail-ej1-f50.google.com with SMTP id jp10so13378828ejb.0 for ; Mon, 03 Aug 2020 13:02:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:in-reply-to:to; bh=b6alPBgTSyXhaw1Bj/jo3G7jOnfK2SRiXGSMwRiYVqM=; b=tNz2KG9vILCRlJgZRdbpqcmHVYv6R7of980PYzqLePIYUW4YqmU023wFjRDQ1km1WM pCjPDVdhCHjuIcLhy3M8vFAE6cIbr2R4uR355WYFu7Smx20TtujRIX4g4GHn25kVMCLE LkVEXh5NMbe+im1QRBuc41ghkFNRXzNYgNfsY1Gz2F9aUcHUeTuDt3lnTIkryrCTtnYS NzJPUkf6nSf2jrZU4l/FNaQhvlOAQ1HlqaVrHTYtTIRpY0H3mnWSmaom1pJcXEgMShFO 5zPOFfuuQ6bCOtRnQX/7N6VLo5dTJknyTmv/wk10Z3SDiYPOH1EB98DMSN8MzHExF9L0 RB3w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:date:message-id:references:in-reply-to:to; bh=b6alPBgTSyXhaw1Bj/jo3G7jOnfK2SRiXGSMwRiYVqM=; b=Ix4zuteKwtnTR9K2ypY5z6abtmzjHVhhJpbESL0wFrAuahY9j5pdfKSjnSrGHKrJqi baSu5Hp0Y3rg5ZE8eGULHs7qTm7R9x8wprB4QCikhXRY+HwxTWSfFX6rhOeBArXHtreg z+0hgv162iHT6MjRZf1Bff3pfdBWxSM/ryyLiq28DI2UXIfqmBL1C4NcexDhb4YCMLwb nBmztOIVgfcF1wqNbwgdXht+zD36eWkJE7uzk2WE9IbPW3HDATer5uXenwE39q0ugq2q gdw9zjr8Ar++xBCs/KPlBNrDI5MlQnyfpIItFsLNXgWPCiCQtUUZ+GzZfOr+TjSULtDt c61Q== X-Gm-Message-State: AOAM532QsF6F8NNXpYuvbqF8sqM9EdzEy5o2u8JO9Jv7JaXIVuYTTjTD 5DPHaa+o0zpCB2UEtlJg8QlFuOqotpQ= X-Google-Smtp-Source: ABdhPJxMfLzzyZPcqVoxe8Ca1s5215sBEheHhoT5yuvQeS12V7CTNso61ADovbhElIbDRpuME0mmtw== X-Received: by 2002:a17:906:7250:: with SMTP id n16mr19105123ejk.290.1596484948566; Mon, 03 Aug 2020 13:02:28 -0700 (PDT) Return-Path: Received: from [192.168.1.122] ([160.226.128.22]) by smtp.gmail.com with ESMTPSA id 6sm1756210edw.20.2020.08.03.13.02.27 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 03 Aug 2020 13:02:27 -0700 (PDT) Content-Type: multipart/alternative; boundary=Apple-Mail-ED8D54A8-6184-4B5B-82F1-230ACABF2CEE Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) Subject: Re: [FlyRotary] Re: Kelly's 20B/Lyc 540 mount pics4 Date: Mon, 3 Aug 2020 22:02:25 +0200 Message-Id: <5B02044B-702B-4E21-A2D9-EB5875C940A2@gmail.com> References: In-Reply-To: To: Rotary motors in aircraft X-Mailer: iPhone Mail (17F80) --Apple-Mail-ED8D54A8-6184-4B5B-82F1-230ACABF2CEE Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Bill : The bending moment and axial loads you mentioned. Could it possible b= e - why some of the early design allumnium casted sumps, of the Mistral 3 r= otary engines developed cracks ? as i remembered that the bed type mount for= the rotary ( pusher type config.) the thicker sump and plate, has a lot to d= o with these loads and stiffen the rotars and irons as a solid unit, as well= the bigger diameter tension bolts and =E2=80=9Cdowls=E2=80=9D It was just crossing my mind, and i have no previous experience in these loa= ds and type of mounts as well as the casted sumps. The torque loads of the prop and all ads up. Included : cut out of the article Mistral Magic=20 Could the loads be part of the sump problem in these type of mounts? i don=E2= =80=99t know. Cracked Sump =E2=80=9CI did have a couple of teething problems; the most important one wa= s a crack in the aluminum-cast engine sump that I found during taxi tests. M= istral reacted in their usual fashion. After getting details, they confirmed= they had a crack in the same area on one of the sumps they tested. They des= igned a reinforced sump, but never got a repeat crack on the other sumps, so= none of the new models were made. I was offered a temporary replacement unt= il the new sumps would be produced to replace all present sumps. I decided t= o wait, and got my new sump within two months=E2=80=94and a Mistral engineer= came and installed it for me.=E2=80=9D Sent from my iPhone Le Roux Breytenbach=20 > On 03 Aug 2020, at 19:34, William Jepson wrjjrs@gmail.com wrote: >=20 > =EF=BB=BF > Charlie, and everyone rotary, > I can see the desire to put a rotary in a similar mount to a standard airc= raft engine. But I want to remind everyone that a Mazda wankel in its automo= tive layout doesn=E2=80=99t work well as the stack of plates and housings is= n=E2=80=99t set up to handle the bending moment. In Mazda=E2=80=99s racing e= ngines they added plates to enable them to hang the engine from one end. The= y still used cradle mounts. The Lyc engine shown in the example has 2 crankc= ase halves solid front to rear where the mounts are. If you don=E2=80=99t pl= an to build the rotary with some modifications for axial stiffness and housi= ng location it isn=E2=80=99t a good idea to hang it from one of the end plat= es. > Bill Jepson=20 >=20 >> On Mon, Aug 3, 2020 at 5:45 AM Charlie England ceengland7@gmail.com wrote: >>=20 >>=20 >>> On Mon, Aug 3, 2020 at 7:40 AM Charlie England wr= ote: >>> There are 8 pics in this series. My image resizer program got them down t= o around 110-140 KB each, so they'll need to come in 8 separate emails.=20 >>>=20 >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/Lis= t.html --Apple-Mail-ED8D54A8-6184-4B5B-82F1-230ACABF2CEE Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable Bill : The bending moment and axial loads y= ou mentioned. Could it possible be - why some of the early design  allu= mnium casted sumps, of the Mistral 3 rotary engines developed cracks ? as i r= emembered that the bed type mount for the rotary ( pusher type config.) the t= hicker sump and plate, has a lot to do with these loads and stiffen the rota= rs and irons as a solid unit, as well the bigger diameter tension bolts and =E2= =80=9Cdowls=E2=80=9D
It was just crossing my mind, and i have no previous= experience in these loads and type of mounts as well as the casted sumps.The torque loads of the prop and all ads up.

Inc= luded : cut out of the article Mistral Magic 
Could the loads= be part of the sump problem in these type of mounts? i don=E2=80=99t know.<= /div>

Cracked Sump

=E2=80=9CI did h= ave a couple of teething problems; the most important one was a crack in the= aluminum-cast engine sump that I found during taxi tests. Mistral reacted i= n their usual fashion. After getting details, they confirmed they had a crac= k in the same area on one of the sumps they tested. They designed a reinforc= ed sump, but never got a repeat crack on the other sumps, so none of the new= models were made. I was offered a temporary replacement until the new sumps= would be produced to replace all present sumps. I decided to wait, and got m= y new sump within two months=E2=80=94and a Mistral engineer came and install= ed it for me.=E2=80=9D


S= ent from my iPhone
Le Roux Breytenbach 

On 03 Aug 2020, at 19:34, William Jepson wrjj= rs@gmail.com <flyrotary@lancaironline.net> wrote:

=
=EF=BB=BF
Charlie, and everyone rotary,
I can see th= e desire to put a rotary in a similar mount to a standard aircraft engine. B= ut I want to remind everyone that a Mazda wankel in its automotive layout do= esn=E2=80=99t work well as the stack of plates and housings isn=E2=80=99t se= t up to handle the bending moment. In Mazda=E2=80=99s racing engines th= ey added plates to enable them to hang the engine from one end. They still u= sed cradle mounts. The Lyc engine shown in the example has 2 crankcase halve= s solid front to rear where the mounts are. If you don=E2=80=99t plan to bui= ld the rotary with some modifications for axial stiffness and housing locati= on it isn=E2=80=99t a good idea to hang it from one of the end plates.
=
Bill Jepson 

On Mon, Aug 3, 2020 at 5:45 AM Charli= e England ceengland7@gmail.com &= lt;flyrotary@lancaironline.ne= t> wrote:


On Mon, Aug 3, 2020 at 7:40 AM Charlie England <ceengland7@gmail.com> wrote:
There are 8 pics in this series. My image resizer p= rogram got them down to around 110-140 KB each, so they'll need to come in 8= separate emails. 

=
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Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.l= ancaironline.net:81/lists/flyrotary/List.html
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