X-Junk-Score: 0 [] X-KAS-Score: 0 [] From: " eanderson@carolina.rr.com" Received: from [47.43.26.141] (HELO p-impout001.msg.pkvw.co.charter.net) by logan.com (CommuniGate Pro SMTP 6.4.0) with ESMTPS id 2983449 for flyrotary@lancaironline.net; Sun, 17 Mar 2024 21:39:26 -0400 Received-SPF: pass receiver=logan.com; client-ip=47.43.26.141; envelope-from=eanderson@carolina.rr.com Received: from [192.168.1.7] ([66.26.212.217]) by cmsmtp with ESMTP id m1y0rz8S6sY9Em1y0rbpCe; Mon, 18 Mar 2024 01:39:09 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=carolina.rr.com; s=c20240129; t=1710725949; bh=lxSwBqElyp+Tm//NeZ0oXP4cDSFnbXdCkrMH8r+WFpM=; h=From:To:Subject:Date:In-Reply-To:References:Reply-To; b=miVewRfW6P3uvnSh6471g60/s3is1UppfOAb6h8Gvvi5opGMdJsZmTyRNiGesuyfk k+Z/Cd4ftGUoJYzAaq2nNwnIf8R9A0nRyYsoIadsUt20egarQEGZOft+g2BA+EEQg2 TwSsL1SBe4cqKMrtI9ZcQaHp8/UDrXG1JfiTg9yx9yQ0mvFU6sc8zdNOYN+RHeyaic UKt5anz+MjN09dsQWMcPdOML45jKwpJxm+hlL/6D5bV6oqj/Fl8eIqu6F9CLce73sD BxgPyUir0as5g4t/BoETkyqa3mjcQbVsKLVFjD4fQxndleOht1dx3x0M2YavjLCUEH AN55PJrggyvFQ== X-Authority-Analysis: v=2.4 cv=W40+VwWk c=1 sm=1 tr=0 ts=65f79b3d a=WcvdwKkRgKsaRaJ9Bx4DbQ==:117 a=WcvdwKkRgKsaRaJ9Bx4DbQ==:17 a=5KLPUuaC_9wA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=3oc9M9_CAAAA:8 a=7g1VtSJxAAAA:8 a=QMYG5tJPMGOXIK2efx8A:9 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=uxBdeEgDS6fiFXP_VFMA:9 a=4PqaHlqInYVUtI_y:21 a=frz4AuCg-hUA:10 a=_W_S_7VecoQA:10 a=lqcHg5cX4UMA:10 a=Urk15JJjZg1Xo0ryW_k8:22 a=grOzbf7U_OpcSX4AJOnl:22 To: "flyrotary@lancaironline.net" Subject: =?utf-8?q?Re=3a=20=5bFlyRotary=5d=20Re=3a=20Oil=20pump=20wouldn=e2=80=99t?= =?utf-8?q?=20prime=20cause?= Date: Mon, 18 Mar 2024 01:39:08 +0000 Message-Id: In-Reply-To: References: Reply-To: eanderson@carolina.rr.com User-Agent: eM_Client/9.2.2157.0 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="------=_MB347AD2F5-6F6A-4739-805F-EF095557AE77" X-CMAE-Envelope: MS4xfBR6zU1cG7vYuO6Rgi99CzfmDruWmCQDqHgxRDs9jukZ3kcs1ky6fs3yrqHuxOkX8f6Y/ha2o65BYx4TUvS7CPihz1D7AL1dwTCgjBkWxQbf4QlLglTM kuQT3/Lqh9wrGTvd/MYvNiMARPOHdpfyoG8Nlxtnl2Ujhv7k4/6sDcvTFUl1HlELg/iNWIj2U0asFnD15952H6GdluJH03bbrCs= --------=_MB347AD2F5-6F6A-4739-805F-EF095557AE77 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Yep, happened to me. I must have flow at least 20 hours with out the=20 cotter key installed. Landed at Shady Bend where Tracy, Fin and I spent some time admiring=20 each others rig. I remember showing how my new intake manifold inlet=20 could open fully when I shoved the throttle open. So we went in and=20 after spending night at Tracy, we decided the next morning (which was=20 rather cool) to go flying. Well, forgetting I had left my throttle wide open the evening before, I= =20 hopped in and fired her up. Well, with cool morning air and throttle=20 wide open the rpm zoomed to over 5500 in what seemed like a fraction of=20 a second. Yanked the throttle back and all seemed OK. Not much wind,=20 so Tracy and Finn elected to takeoff downwind and did so. Me being a=20 bit heavier and just not like taking off downwind. I started taxing to=20 the other end of the runway. While taxing I noticed my oil pressure seem stuck at around 25 psi where=20 as normally taxing it was closer to 40 psi. Well, I tried to tell=20 myself it was nothing, but just couldn't bring myself to take off. So=20 taxied back to the hanger and shut it down. After several attempts=20 could not find anything wrong with the oil system. So took off the=20 cowling and oil pan and while juggling the oil pan heard a metalitic=20 clink in the pan .... THERE IT WAS the Oil pump cotter pin in the=20 bottom of the oil pan. So during my 20 hours of flying only the nut=20 torque kept the belt turning the pump. I figured the sudden start with the cold oil was too much for the nut=20 and it began to loosen. Glad I listen to my gut. Glad your event did not have a bad ending. Ed Anderson ------ Original Message ------ From "William Schertz wschertz343@gmail.com"=20 To "Rotary motors in aircraft" Date 3/16/2024 12:27:38 AM Subject [FlyRotary] Re: Oil pump wouldn=E2=80=99t prime cause >As I recall, Ed Anderson had a related incident with the oil pump, he=20 >flew to shady grove, and in applying power for takeoff, lost oil=20 >pressure, and when they removed oil pan found the cotter key. >Glad you found it. > >On Fri, Mar 15, 2024 at 6:46=E2=80=AFPM DOUGLAS LOMHEIM dlomheim@aol.com= =20 > wrote: >>I removed my =E2=80=9886 13B from the mount (took two hrs.) and when pull= ing=20 >>the pan off, found pieces of a cotter key; so knew I=E2=80=99d screwed=20 >>something up! Pulled the =E2=80=9Cfront=E2=80=9D cover and found the oil = pump shaft=20 >>but the nut was loose, and I=E2=80=99d never bent the locking tab over on= e=20 >>flat in the nut. When I spun it up with the starter it immediately=20 >>tore up and spit out the cotter key, which dropped into the pan. Will=20 >>do a better job of quality checking my work as it goes back together! >> >>Thanks Dave Leonard for letting me know it should easily prime the oil=20 >>pump if all was installed correctly the first time. >> >>Doug >> >> >> >>Sent from my iPhone-- >>Homepage: http://www.flyrotary.com/ >>Archive and UnSub: =20 >>http://mail.lancaironline.net:81/lists/flyrotary/List.html --------=_MB347AD2F5-6F6A-4739-805F-EF095557AE77 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Yep, happened to me. I must have flow at least = 20 hours with out the cotter key=C2=A0 installed.=C2=A0

Landed at Shady Bend where Tracy, Fin and I spent some time admiri= ng each others rig.=C2=A0 I remember showing how my new intake manifold inl= et could open fully when I shoved the throttle open.=C2=A0 So we went in an= d after spending night at Tracy, we decided the next morning (which was rat= her cool) to go flying.=C2=A0

=C2=A0Well, forget= ting I had left my throttle wide open the evening before, I hopped in and f= ired her up.=C2=A0 Well, with cool morning air and throttle wide open the r= pm zoomed to over 5500 in what seemed like a fraction of a second.=C2=A0 Ya= nked the throttle back and all seemed OK.=C2=A0 Not much wind, so Tracy and = Finn elected to takeoff downwind and did so.=C2=A0 Me being a bit heavier= and just not like taking off downwind.=C2=A0 I started taxing to the other= end of the runway.
While taxing I noticed my oil pressure seem st= uck at around 25 psi where as normally taxing it was closer to 40 psi.=C2= =A0 Well, I tried to tell myself it was nothing, but just couldn't bring my= self to take off.=C2=A0 So taxied back to the hanger and shut it down.=C2= =A0 After several attempts could not find anything wrong with the oil syste= m.=C2=A0 So took off the cowling and oil pan and while juggling the oil pan = heard a metalitic clink in the=C2=A0 pan .... THERE=C2=A0 IT WAS the Oil p= ump cotter pin in the bottom of the oil pan.=C2=A0 So during my 20 hours of = flying only the nut torque kept the belt turning the pump.=C2=A0

I figured the sudden start with the cold oil was too much = for the nut and it began to loosen.=C2=A0 =C2=A0Glad I listen to my gut.

Glad your event did not have a bad ending.
<= div>
Ed Anderson


------ Original Message ------
To "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Date 3/16/2024 12:27:38 AM
Subject [FlyRotary] Re: Oil pump wouldn=E2=80=99t prime cause

As I=C2=A0recall, Ed Anderson had a related incident with= the oil pump, he flew to shady grove, and in applying power for takeoff, lo= st oil pressure, and when they removed oil pan found the cotter key.
Gl= ad you found it.

On Fri, Mar 15, 2024 at 6:46=E2=80=AFPM DOUGLAS LOM= HEIM dlomheim@aol.com <flyrotary@lancaironline.net> = wrote:
I remo= ved my =E2=80=9886 13B from the mount (took two hrs.) and when pulling the= pan off, found pieces of a cotter key; so knew I=E2=80=99d screwed somethin= g up!=C2=A0 Pulled the =E2=80=9Cfront=E2=80=9D cover and found the oil pump = shaft but the nut was loose, and I=E2=80=99d never bent the locking tab ov= er one flat in the nut.=C2=A0 When I spun it up with the starter it immedia= tely tore up and spit out the cotter key, which dropped into the pan.=C2=A0 = Will do a better job of quality checking my work as it goes back together!= =C2=A0

Thanks Dave Leonard for letting me know it should easily prime the oil pump = if all was installed correctly the first time.

Doug



Sent from my iPhone--
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