X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=PbaBeRpd c=1 sm=1 tr=0 a=NNVv7jChr1Ep0eD30FeLsQ==:117 a=_RQrkK6FrEwA:10 a=aOWVIxkx-zkA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=7g1VtSJxAAAA:8 a=P7dXYGoo-p_xc-gl3kQA:9 a=ZhHZYK43VzE7I0qX:21 a=-JN0MLDdWmfu4Ffm:21 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=LeV9yUcFP03pwrZp_68A:9 a=zfbzFz4Kl85cj6wu:21 a=kDkMtOATxdgXZsGd:21 a=vRFpBtYY1g6YrW1b:21 a=Urk15JJjZg1Xo0ryW_k8:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "Andrew Martin andrew@martinag.com.au" Received: from mail-wm1-f49.google.com ([209.85.128.49] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 558074 for flyrotary@lancaironline.net; Thu, 23 Jul 2020 08:23:23 -0400 Received-SPF: none receiver=logan.com; client-ip=209.85.128.49; envelope-from=andrew@martinag.com.au Received: by mail-wm1-f49.google.com with SMTP id y24so824581wma.1 for ; Thu, 23 Jul 2020 05:23:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=martinag-com-au.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=o+69ZPfiuhs1a8yWsjAyyvwFpMJp44gKFbZ8p+aHhRA=; b=AdHe4S+xZYSfC3A546iFhAkrYqFQUYYGM3AVa2slaCQGOYXutqvyGeBRsUeF/O8TjY k8S41GKVNUcNdvsnSMB2V21N3ugU6K+lpmfP8Z9z3+t+1X1V7ie5ia0y0QPRVQzzBdkP 3X5xdN2iFCNADyOmODLeRvr77wtM9jrlmUIWmbfSABrYIXIARHmHE/4bPZ76tGZAEKzq xnoExf+SPkH7pU0EuWOSxJoZjfPGSIjsSVpniIHNG5TR5mVsjBV5WJtrcKi++GGeOYYV Uvwb185SPcDLKC9vQVRAVxII/L9s8AnT3XwLhGtAnVHGAyelGH6lsQgxOu9ldL2g/Un8 5P2w== 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=o+69ZPfiuhs1a8yWsjAyyvwFpMJp44gKFbZ8p+aHhRA=; b=OrMYaQtu/d7OE9UendGUeodYB2jtvo72S3LVsqyoFVkC8VGX2ghqk5QPipBdCj6Dvg Vz0Cqq1oy+vuryCrxHbFo97Vp7JiYO4wo0i/hkqQl3+DPwak0Y5xOcMx/mPDIMjlLJV5 wiu3BlI4WMGUyUvO4LHzUvvTZM6QJEhoXl9lZn3Q0AtjqUadc0dBkQEvrTDsf9IMfruH BxY2yq/H8Ua1HhWuWbn1IPSA2MLq2YlDrnglhp1WP2Sie1kJU/WD3AnqkA3qkmF9K7ta dJmHkXGo3jnipUYbwVm38oGw5ln72+a9YLFk2I61Rx1GyQshqPBY+545kPcXQSU9hNsA OkjQ== X-Gm-Message-State: AOAM530SCgztVpBl29q0OFDOo2YJwgHMXzoqjy+6doq44LTi/RLjSZct Zqm1ddXyvq141CZddYwHELVhpEV/go2RfS5BJwwATbc= X-Google-Smtp-Source: ABdhPJyFbMu6KtXfCyYXxynZo/Jr4typGAKo9/XWzecz75Ct3ijczalv1Gy8G1DACS1C5KSU+6qYoKdyOdjNqJXVVVY= X-Received: by 2002:a1c:cc12:: with SMTP id h18mr4260710wmb.56.1595506984849; Thu, 23 Jul 2020 05:23:04 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Thu, 23 Jul 2020 20:22:52 +0800 Message-ID: Subject: Re: [FlyRotary] Engine Mount specs To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="00000000000011ac7c05ab1aebe7" --00000000000011ac7c05ab1aebe7 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Im no engineer, so this is worth what it cost. That design is not ideal, but very similar to how I built mine, much better if you can make the tubes straight line from mount to firewall attach. Then lighter tubes can be used. Those tube you highlighted are under tension so 5/8 tube is fine. Basically, the thinner the wall thickness you use the more critical the welds. So choose thickness on your welding skill. For long tubes under compression, go up a size or so to help with bending load. Best advice I got was to go around the airport looking at what different certified aircraft get away with. They never look strong enough but seem to do the job. Andrew On Thu, 23 Jul 2020 at 12:23 pm, Le Roux Breytenbach breytenbachleroux@gmail.com wrote: > > Hi All members: > The 4130 chromemoly seamless pipe for the engine mount. > What is the appropriate size for building a engine frame, as the included > drawing of Paul L. ( copyright P.L ) > The outside diameter and wall thickness ? > 7/8 Inch OD x 0,069 =E2=80=9C Wall thickness ? > or 0.120 W > > 1 inch x OD ? > Cant find any specifications for such a design. > > > > Sent from my iPhone > Le Roux Breytenbach -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --=20 Regards Andrew Martin Martin Ag --00000000000011ac7c05ab1aebe7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Im no engineer, so this is worth what it cost.
That design is not ideal, but very similar to how I b= uilt mine, much better if you can make the tubes straight line from mount t= o firewall attach. Then lighter tubes can be used.=C2=A0
Those tube you highlighted are under tension so 5/8 tube is fine. Basi= cally, the thinner the wall thickness you use the more critical the welds. = So choose thickness on your welding skill. For long tubes under compression= , go up a size or so to help with bending load.

Best advice I got was to go around the airpor= t looking at what different certified aircraft get away with. They never lo= ok strong enough but seem to do the job.
Andrew

= On Thu, 23 Jul 2020 at 12:23 pm, Le Roux Breytenbach breytenbachleroux@gmail.com <flyrotary@lancaironline.net> wrote:=

Hi All members:
The 4130 chromemoly seamless pipe for the engine mount.
What is the appropriate size for building a engine frame, as the included d= rawing of Paul L. ( copyright P.L )
The outside diameter and wall thickness ?
=C2=A07/8=C2=A0 Inch OD x 0,069 =E2=80=9C Wall thickness ?
or 0.120 W

1 inch x OD ?
Cant find any specifications for such a design.



Sent from my iPhone
Le Roux Breytenbach --
Homepage:=C2=A0 http://www.flyrotary.com/
Archive and UnSub:=C2=A0 =C2=A0http://mail= .lancaironline.net:81/lists/flyrotary/List.html
--
Regards Andrew Martin Martin Ag
--00000000000011ac7c05ab1aebe7--