X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=PbaBeRpd c=1 sm=1 tr=0 a=vO/slmcx8qdh/R/bAyGypg==:117 a=x7bEGLp0ZPQA:10 a=oSMvVwY2MYMA:10 a=_RQrkK6FrEwA:10 a=hOpmn2quAAAA:8 a=Ia-xEzejAAAA:8 a=pGLkceISAAAA:8 a=PB0YPnvbu6Xa5a0mdgMA:9 a=QEXdDO2ut3YA:10 a=9CXjJpDndMjAhGNKX-wA:9 a=6HnIpEMG6pHlfnxb:21 a=GyA-uvUxXSCciAkwuKQO:22 a=Urk15JJjZg1Xo0ryW_k8:22 From: "David Leonard wdleonard@gmail.com" Received: from mail-qv1-f42.google.com ([209.85.219.42] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 507060 for flyrotary@lancaironline.net; Wed, 08 Jul 2020 19:53:17 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.219.42; envelope-from=wdleonard@gmail.com Received: by mail-qv1-f42.google.com with SMTP id el4so158272qvb.13 for ; Wed, 08 Jul 2020 16:53:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=1JzeLRcTNB150Y9PVolCrOUi3OaY5vdrEofGYHcxpok=; b=re9YwaU1tQNr8b7M1EQ8IP8YpULv35xbKnqpe8TffXw9xT69NoKhLFic8miMJx1Ee5 nSNQJtK3K6JhzxDJrfBNW2/iIaXNg/FpVuKlLx7pIbanU6H69tllayQhhSsUhY3YG8Tj 6TKCGdQzTcDnsMEzJX9ANxZMyUgnD0K9Kk4nuwwiS/9v00abPj/EudfyYanQlQwCboYu gXksZCFKUgEqBXvOu6ls7SH4eJ19g/YLm8w+xxHlO4AKPY/szUlJXCAmB0vIRa0AiUlT 5HbZfNIdaJej652iGSpUA8eAUwEiOpouLviQPMQ1qmle81RbzJVcZ1ihPAgQ8n6uMpqA gFJA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=1JzeLRcTNB150Y9PVolCrOUi3OaY5vdrEofGYHcxpok=; b=Rt/QfxNHok8n5NsHN7nPo537nLwyljckT/fuHDl7vHd2cfIvWztTZS87HpDaKbQffN TDXBG4Hl78YBxZV40g3yLqcLO+as34mJ1VNAvPp5xeyDDzrVNlBfZcRGl6B8pqLHfPmp ocvl79busYkqduoi0/rkQ8yEaSY256HDM3yJXLAZ322X3RChuly/dDH3VyiJfWSwrPGk 2hfU2zpJDngTiFDD3Ij3RTcS48kEj34s+mkX9bY7s89y+emYKxjnmzqTU6+Ygzv72h7I aUPYxHSzcjH+P4QnZbz4qiVMoWwptuM7NZGDdUiS7Wth3jrvmLMKAmpxL+jPHxgm5z8T /Q8g== X-Gm-Message-State: AOAM5316W/cu+sguRaU3mpQn2ucksk9kuT9jJ9KdbyCIbfvW+72GcHlq yuWQl8q38+iB/QM9BBjpKW9buyWrWx+lmEj/zMjKfzA7 X-Google-Smtp-Source: ABdhPJxWAzFLqZAg3mWurXDEAhNxi2Vkv6EFlhsm1SIZQQ2ITwCsxSpGTUDFOG2hz3rwGTVcgH3cTna5SgL3bvq2wR4= X-Received: by 2002:a05:6214:bce:: with SMTP id ff14mr59077135qvb.196.1594252381360; Wed, 08 Jul 2020 16:53:01 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Wed, 8 Jul 2020 16:52:50 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Aviation Specific 13B/20B Mazda Front Side Housing To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000df966805a9f6ce93" --000000000000df966805a9f6ce93 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable "Wonder why Mistral used dynafocal type mounting on their 13b and 20b designs?" Completely makes sense to me. Most of the kit and certified aircraft were already using dynafocal mounts for the certified engines. The plan was to make it easy to install the Mistral engine instead. They did not modify the front end housing (as in the current proposal), but they built a custom front cover that connected to the dynafocal mount and also provided for an alternator and vacuum pump. It looked like a really nice item and would have made home rolled rotary installations much simpler too. A modified front side-housing would be a nice option but the front cover has the advantages of being easier to make and fit. it could also be installed without disassembly of the whole engine. But it did seem to me like it would put quite a stress on the bolts going into the front side-housing. Dave Leonard On Wed, Jul 8, 2020 at 3:49 PM Marcus Wiese cardmarc@charter.net < flyrotary@lancaironline.net> wrote: > Wonder why Mistral used dynafocal type mounting on their 13b and 20b > designs? > M > > Sent from my iPad > > On Jul 8, 2020, at 12:11 PM, William Jepson wrjjrs@gmail.com < > flyrotary@lancaironline.net> wrote: > > =EF=BB=BF > Kelly, > The "dynafocal" type mount has been tried on the rotary but has not > worked out well..One of the obvious rotary traits is that it has a hot an= d > cold side. Various methods have been used to limit this but there is no w= ay > to eliminate it completely. Because of this the engine tends to "work" an= d > move around on the studs. Using the engine as a stressed member is not > recommended with the rotary. If you were to do this anyway I wouldn't do > it without a stud kit. You will have better results using a bed mount. YM= MV > Bill Jepson > > On Wed, Jul 8, 2020 at 1:18 AM Kelly Troyer keltro@gmail.com < > flyrotary@lancaironline.net> wrote: > >> *I am in contact with a person with the design and manufacturing **capab= ility >> to produce an **Aviation Specific 13B/20B Mazda Front Side** Housing >> machined from 7075-T6* *with mount points that **would allow these >> engines* >> >> >> >> *to be a bolt in to the engine mount ring (30 degree number 1 Dyna) as >> used by the "Vans" RV-10 and other aircraft that use the Lycoming O/IO 5= 40 >> engine..........This side plate is in the preliminary design stage and a= t >> thispoint I am a go between to see if there would be any interest in thi= s >> product if and when it is * >> >> >> >> >> >> >> >> *produced...........I personally am interested this side plate........As >> we on this forum know both the 13B / 20B are capable of trulyamazing pow= er >> levels both naturally aspirated and turbo boosted.........The 20B would >> make the Van's RV-10 , Glasair 3 or Lancair's that use the Lycoming O/IO >> 540 an easy 300+ hp almost bolt in engine...........The "Reno" Sport Cla= ss >> "Glasairs" and Lancairs" are producing almost 400 mph speeds using dual >> turbo Lycoming IO-550 engines that are virtual hand grenades pulling ove= r >> 700 hp...........There are turbo 20B's pulling1200 hp out in the auto >> racing world with good reliability..........A 20B boosted to 700+ hp is = not >> even breathing hard.........IMHOWould like to hear what interest there m= ay >> be in this product if and when it may be produced............Or any >> comments pro or con..............* >> >> -- >> Kelly Troyer >> >> --000000000000df966805a9f6ce93 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
"Wonder why Mistral used dynafocal t= ype mounting on their 13b and 20b designs?"

=
Completely makes sense to me.=C2=A0 Most of the kit and certifie= d aircraft were already using dynafocal mounts for the certified engines.= =C2=A0 The plan was to make it easy to install the Mistral engine instead.= =C2=A0 They did not modify the front end housing (as in the current proposa= l), but they built a custom front cover that connected to the dynafocal mou= nt and also provided for an alternator and vacuum pump.=C2=A0 It looked lik= e a really nice item and would have made home rolled rotary installations m= uch simpler too.=C2=A0 A modified front side-housing would be a nice option= but the front cover has the advantages of being easier to make and fit.=C2= =A0 it could also be installed without disassembly of the whole engine.=C2= =A0 But it did seem to me like it would put quite a stress on the bolts goi= ng into the front side-housing.

Dave Leonard=

On Wed, Jul 8, 2020 at 3:49 PM Marcus Wiese <= a href=3D"mailto:cardmarc@charter.net">cardmarc@charter.net <flyrotary@lancaironline.net>= wrote:
Wonder why Mistral used= dynafocal type mounting on their 13b and 20b designs?
M

Sent from my iPad

On Jul 8, 2020, at 12:11 PM, William Jepson wrjjrs@gmail.com <flyrotary@lancaironline.net&= gt; wrote:

=EF=BB=BF
Kelly,
The "dynafocal" type mount has been tried o= n the rotary but has not worked out well..One of the obvious rotary traits = is that it has a hot and cold side. Various methods have been used to limit= this but there is no way to eliminate it completely. Because of this the e= ngine tends to "work" and move around on the studs. Using the eng= ine as a stressed member is not recommended with the rotary. If=C2=A0 you w= ere to do this anyway I wouldn't do it without a stud kit. You will hav= e better results=C2=A0using a bed mount. YMMV
Bill Jepson

On= Wed, Jul 8, 2020 at 1:18 AM Kelly Troyer keltro@gmail.com <flyrotary@lancaironline.net> wro= te:
I am in contact with a person with the design and man= ufacturing=C2=A0capability to produce an=C2=A0Aviation Specific 13B/20B Maz= da Front Side=C2=A0Ho= using machined from 7075-T6=C2=A0with mount points that=C2=A0would all= ow these engines

to be a bolt in to= the engine mount ring (30 degree number 1 Dyna) as used by the "Vans&= quot; RV-10 and other aircraft that use the Lycoming O/IO 540 engine.......= ...This side plate is in the preliminary design stage and at this

po= int I am a go between to see if there would be any interest in this product= if and when it is=C2=A0produced...........I personally am interest= ed this side plate........As we on this forum know both the 13B / 20B are c= apable of truly

amazing power levels both naturally aspirated and tu= rbo boosted.........The 20B would make the Van's RV-10 , Glasair 3 or L= ancair's that use the Lycoming O/IO 540 an easy 300+ hp almost bolt in = engine...........

The "Reno" Sport Class "Glasairs&qu= ot; and Lancairs" are producing almost 400 mph speeds using dual turbo= Lycoming IO-550 engines that are virtual hand grenades pulling over 700 hp= ...........There are turbo 20B's pulling

1200 hp out in the auto= racing world with good reliability..........A 20B boosted to 700+ hp is no= t even breathing hard.........IMHO

Would like to hear what interest = there may be in this product if and when it may be produced............Or a= ny comments pro or con..............=C2=A0=C2=A0

--
Kelly Troyer

<= /div>
--000000000000df966805a9f6ce93--