From: "Andrew Martin andrew@martinag.com.au" Received: from pmg.Logan.com ([207.170.160.161] verified) by logan.com (CommuniGate Pro SMTP 6.5.3) with ESMTPS id 4479614 for flyrotary@lancaironline.net; Sun, 28 Dec 2025 18:44:13 -0500 Received: from pmg.Logan.com (localhost [127.0.0.1]) by pmg.Logan.com (Proxmox) with ESMTP id AF04E23CA9 for ; Sun, 28 Dec 2025 18:44:13 -0500 (EST) Received-SPF: none (martinag.com.au: No applicable sender policy available) receiver=pmg.Logan.com; identity=mailfrom; envelope-from="andrew@martinag.com.au"; helo=mail-vs1-f52.google.com; client-ip=209.85.217.52 Received: from mail-vs1-f52.google.com (mail-vs1-f52.google.com [209.85.217.52]) by pmg.Logan.com (Proxmox) with ESMTPS for ; Sun, 28 Dec 2025 18:44:09 -0500 (EST) Received: by mail-vs1-f52.google.com with SMTP id ada2fe7eead31-5de23ddba5eso6341674137.3 for ; Sun, 28 Dec 2025 15:44:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=martinag-com-au.20230601.gappssmtp.com; s=20230601; t=1766965442; x=1767570242; darn=lancaironline.net; h=to:subject:message-id:date:from:in-reply-to:references:mime-version :from:to:cc:subject:date:message-id:reply-to; bh=CBJXUszIPNBvCqj8EQsBHKQAKBUWGbABdqFPa7lY3rk=; b=eQD10sB6ATq8SKgV8Bx6+vdCtBZ1XquFMRqZf5n6b3/E6It/1obb32U2cld0an9bZ/ vICevmCunWUSqpzFYhrlwgqfbmtrAXocUvgpc0GgsSfOBdjHDBIo29e951ZaU8NIWWmz Lrbw4l7E55hb4CUBgP8DsOKGaCM+t1Ffwpeu922fbz9FUkkvSk4aKLFzk0SOOcEQRj7z TIGsTEXCqetOBFA79cY7sAbhyTJkbaLKb3Wyx+n9PXrUg5ihFsdkgVplXRXROR5mDOab 4ZCOhtFXu5H9YzI7MrGiLb6QNZAdPAksy3yxKMn17y00dOr3BuuCrSRymcFfZnyCrw4g 5dKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1766965443; x=1767570243; h=to:subject:message-id:date:from:in-reply-to:references:mime-version :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=CBJXUszIPNBvCqj8EQsBHKQAKBUWGbABdqFPa7lY3rk=; b=TS/76DvcFnLEKS3ZyBmM3sNNcJzg4JtCaifjBOLfkRvNHKZ3QIBYS4RLkGzON4WQiq zxJzc03WcNXPE2EJc4cMmqrLzr30Udq042TKYLGu4UdqH2UBzwIFMx1aH7nic728/g4y GBZnL7ctAR5I+8YBINunm182h0p8UPJPCvTZ2hJt0sAYVezmGN6Q2SRndamr+65dKMRR 85/v55idSOFQoWxk+2Q0GStnITrw3AWD2/2tufkKYK45Dq1RDruz+9vGQtHxZdMj6gFY EfLa/nLmAJl4kf5gdgzPGhLeSYM1CVN02XDdwlBc3/BSuCt/O7Wrqsag9KBi6Yjz0lXr U/+Q== X-Gm-Message-State: AOJu0YySZ3C2txXH9OhT6aKUbKB7q1XY2OI+EmaHxVECXdnywNZUQ4EF 1kvNiEHXENjcSoTrQ1zW6XceYL9e4KS7qoDXj0YucXyq0GF4t1AYW5XwuJvoJef7REq507iAXaC JHcoUnfCBzip+UPUrNzMq/qNAJylfJlf/KHkY9jDJSGFTy4hSqzXZFg== X-Gm-Gg: AY/fxX4/91uOMJxdlPXAhkDb6WS+s5mnUgS3b/I2osDOQXcXSWQKtgaHqtlQdHLRUAc 7pXT/SGplaNvRqaX2nN282ZncHdxonzMSC907+rZ8aRNqqvN4fGSh9JUQaQddqGOnlCE5LsXKYW B+oUVEz/9YDhO7WFKzbN2oND6wulErSMyTkjeirs6H26YvB3rbwU+hcU9sI//jKntIGTcL8Uo3d ZIjMdqjfBVxpns43UVJ10Rf90hfc+DOMZFDUuw0OdJ5/JsnwceigmJbvMuPcrN/XZV7 X-Google-Smtp-Source: AGHT+IFfJRUtnmHBN/Z2c/JLtttEWF2N+/exHLtMvqcFQsJdaVJPOsZTKGlTqAPritykqfNJbB8uOQ8+c0GLRzmmlC8= X-Received: by 2002:a05:6102:2b8c:b0:5df:ae62:fc25 with SMTP id ada2fe7eead31-5eb1a617d68mr9285565137.8.1766965442462; Sun, 28 Dec 2025 15:44:02 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: Date: Mon, 29 Dec 2025 07:43:51 +0800 X-Gm-Features: AQt7F2omIHefBsUiEnqgVOmuzjQfBVoJUcHTUfn_GwZ4hNa7h7JdPrdrvUddaak Message-ID: Subject: Re: [FlyRotary] Re: 13B Teardown To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="00000000000087510406470bb34f" X-SPAM-LEVEL: Spam detection results: 0 AWL -0.290 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DMARC_MISSING 0.1 Missing DMARC policy HTML_FONT_SIZE_HUGE 0.001 HTML font size is huge HTML_MESSAGE 0.001 HTML included in message KAM_MXURI 1.5 URI begins with a mail exchange prefix, i.e. mx.[...] RCVD_IN_DNSWL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to DNSWL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#DnsBlocklists-dnsbl-block for more information. RCVD_IN_MSPIKE_H2 -0.01 Average reputation (+2) RCVD_IN_VALIDITY_CERTIFIED_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_RPBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_SAFE_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_NONE 0.001 SPF: sender does not publish an SPF Record WEIRD_PORT 0.001 Uses non-standard port number for HTTP --00000000000087510406470bb34f Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sorry Finn, I didn't mean for anyone to have to read that thread, is why I saved the important bits. I think it valid to reuse orings if you can, in my case the original Mazda orings had swelled slightly and were a bugger to keep in the grooves so I made new ones. The superglue was supplied with the cord so I don't know which version, I just cut & glued to length. I did also add a very small amount of rtv just where the join was just to be sure. Andrew On Sun, 28 Dec 2025, 10:16=E2=80=AFpm Finn Lassen finn.lassen@verizon.net, = < flyrotary@lancaironline.net> wrote: > Thanks Andrew. I suffered through all 80+ posts in that thread and my hea= d > is spinning. My main question about the inner o-rings: the Mazda ones are > not butt-end spliced but overlapped about an inch, why? > > What's the difference between iso- and cyan- superglue when it comes to > splicing o-rings? > > But I might just reuse my existing o-rings. Still soft. May not even pull > the oil control rings. > May get new dowel o-rings as they have set a bit. > > Finn > > On 12/28/2025 12:15 AM, Andrew Martin andrew@martinag.com.au wrote: > > This is the notes on o'rings from my build, Info came from Ausrotary foru= m > members, I just saved the relevant info along with the workshop manual fo= r > my engine, a 13b Renisis, your o'ring lengths may vary slightly depending > on model. Basically its just get the right sized cord, cut it to length, > glue ends with superglue. > > Andrew > > On Sun, 28 Dec 2025 at 10:42, Les C lesphoto@hotmail.com < > flyrotary@lancaironline.net> wrote: > >> Any information on how to make your own "o" rings? >> >> Get Outlook for Android >> ------------------------------ >> *From:* Rotary motors in aircraft on >> behalf of Andrew Martin andrew@martinag.com.au < >> flyrotary@lancaironline.net> >> *Sent:* Saturday, December 27, 2025 7:57:09 PM >> *To:* Rotary motors in aircraft >> *Subject:* [FlyRotary] Re: 13B Teardown >> >> Hi Finn >> You can make your own orings. Actually this is now my preference as it i= s >> extremely cheap & reliable process. >> >> that plane must be a real hoot to fly. Do you want to send it to >> Australia? >> >> Andrew Martin >> +61 0427477144 >> andrew@martinag.com.au >> >> >> >> >> On Sun, 28 Dec 2025, 6:29=E2=80=AFam Finn Lassen finn.lassen@verizon.net= , < >> flyrotary@lancaironline.net> wrote: >> >> I was unable to get compression on more than one chamber. >> >> So I removed the engine from the RV-3B today. >> >> I decided to heat the front bolt with a propane torch for several >> minutes when my HF 3' breaker bar began to deflect noticeably. Then it >> broke loose. >> >> Fortunately I still have the rear nut remover that I fabricated (by >> hand, no less) and welded up back in the late 90ies. Still needed a 2x4 >> to keep engine from moving. Also had to heat the nut with a propane >> torch. Wood block splintered, so used a 5" socket extension between >> counterweight tip and bottom right rear plate corner. Recommend using >> edge area of rear plate that is not used in your application, just in >> case it breaks off. Evidence of threadlocker on both front bolt and big >> nut. Required a rivet gun with mushroom head on the rear shaft to get >> the counterweight off. >> >> Interesting that he rebuild uTube videos I've been watching do not >> mention threadlocker on front bolt and rear nut. >> >> Anticipate several days of cleaning before I'll know what to order. >> >> I wonder if the $80 "reusable" o-ring kit on eBay is junk or if safe to >> use. >> >> Finn >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: >> http://mail.lancaironline.net:81/lists/flyrotary/List.html >> >> > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/Lis= t.html > > > --00000000000087510406470bb34f Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Sorry Finn, I didn't mean for anyone to have to = read that thread, is why I saved the important bits.
I think it valid to reuse orings if you can, in my case the original Mazda= orings had swelled slightly and were a bugger to keep in the grooves so I = made new ones. The superglue was supplied with the cord so I don't know= which version, I just cut & glued to length. I did also add a very sma= ll amount of rtv just where the join was just to be sure.=C2=A0
Andrew



On= Sun, 28 Dec 2025, 10:16=E2=80=AFpm Finn Lassen finn.lassen@verizon.net, <flyrotary@lancaironline.net> wrote:
=20 =20 =20
Thanks Andrew. I suffered through all 80+ posts in that thread and my head is spinning. My main question about the inner o-rings: the Mazda ones are not butt-end spliced but overlapped about an inch, why?

What's the difference between iso- and cyan-=C2=A0 superglue when it comes to splicing o-rings?

But I might just reuse my existing o-rings. Still soft. May not even pull the oil control rings.
May get new dowel o-rings as they have set a bit.

Finn

On 12/28/2025 12:15 AM, Andrew Martin andrew@martinag.com.au wrote:
=20
This is the notes on o'rings from my build, Info came from Ausrotary forum members, I just saved the relevant info along with the workshop manual for my engine, a 13b Renisis, your o'ring lengths may vary slightly depending on model. Basicall= y its just get the right sized cord, cut it to length, glue ends with superglue.

=C2=A0Andrew

On Sun, 28 Dec 2025 at 10:42, Les C lesphoto@hotmail.com <flyrotary@lancaironline.net> wrote:
Any information on how to make your own "o" rings?<= /div>

From: Rotary motors in aircraft <flyrotary@lancaironline.net> on behalf of Andrew Martin andrew@martinag.com.au <flyrotary@lancaironline.net>
Sent: Saturday, December 27, 2025 7:57:09 PM
To: Rotary motors in aircraft <flyrotary= @lancaironline.net>
Subject: [FlyRotary] Re: 13B Teardown
=C2=A0
Hi Finn
You can make your own orings. Actually this is now my preference as it is extremely cheap & reliable process.

that plane must be a real hoot to fly. Do you want to send it to Australia?

Andrew Martin
+61 0427477144
andrew@martinag.com.au




On Sun, 28 Dec 2025, 6:29=E2=80=AFam Finn = Lassen finn.lassen@verizon.net, <flyrotary@lan= caironline.net> wrote:
I was unable to get compression on more than one chamber.

So I removed the engine from=C2=A0 the RV-3B today.

I decided to heat the front bolt with a propane torch for several
minutes when my HF 3' breaker bar began to deflect noticeably. Then it
broke loose.

Fortunately I still have the rear nut remover that I fabricated (by
hand, no less) and welded up back in the late 90ies. Still needed a 2x4
to keep engine from moving. Also had to heat the nut with a propane
torch. Wood block splintered, so used a 5" socket extension between
counterweight tip and bottom right rear plate corner. Recommend using
edge area of rear plate that is not used in your application, just in
case it breaks off.=C2=A0 Evidence of threadlocker on bot= h front bolt and big
nut. Required a rivet gun with mushroom head on the rear shaft to get
the counterweight off.

Interesting that he rebuild uTube videos I've been watching do not
mention threadlocker=C2=A0 on front bolt and rear nut.
Anticipate several days of cleaning before I'll know what to order.

I wonder if the $80 "reusable" o-ring kit on eB= ay is junk or if safe to use.

Finn

--
Homepage:=C2=A0 http://www.flyrotary.com/
Archive and UnSub:=C2=A0 =C2=A0http://mail.lancaironline.net:81/lists/flyrota= ry/List.html

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancairon=
line.net:81/lists/flyrotary/List.html


--00000000000087510406470bb34f--