From: "Andrew Martin andrew@martinag.com.au" <flyrotary@lancaironline.net>
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Date: Sun, 28 Dec 2025 08:57:09 +0800
Message-ID: <CAJxaVD2ysGJk6ouoW6DYKyoXL046JLnDEdfm75JAoAoUtn924g@mail.gmail.com>
Subject: Re: [FlyRotary] 13B Teardown
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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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@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
>

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<div dir=3D"auto"><div>Hi Finn</div><div dir=3D"auto">You can make your own=
 orings. Actually this is now my preference as it is extremely cheap &amp; =
reliable process.</div><div dir=3D"auto"><br></div><div dir=3D"auto">that p=
lane must be a real hoot to fly. Do you want to send it to Australia?</div>=
<div data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div dir=3D"ltr"><=
div><br>Andrew Martin</div><div>+61 0427477144<br><a href=3D"mailto:andrew@=
martinag.com.au" target=3D"_blank">andrew@martinag.com.au</a><br><br><br><b=
r></div></div></div></div></div><br><div class=3D"gmail_quote gmail_quote_c=
ontainer"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, 28 Dec 2025, 6:29=
=E2=80=AFam Finn Lassen <a href=3D"mailto:finn.lassen@verizon.net">finn.las=
sen@verizon.net</a>, &lt;<a href=3D"mailto:flyrotary@lancaironline.net">fly=
rotary@lancaironline.net</a>&gt; wrote:<br></div><blockquote class=3D"gmail=
_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:=
1ex">I was unable to get compression on more than one chamber.<br>
<br>
So I removed the engine from=C2=A0 the RV-3B today.<br>
<br>
I decided to heat the front bolt with a propane torch for several <br>
minutes when my HF 3&#39; breaker bar began to deflect noticeably. Then it =
<br>
broke loose.<br>
<br>
Fortunately I still have the rear nut remover that I fabricated (by <br>
hand, no less) and welded up back in the late 90ies. Still needed a 2x4 <br=
>
to keep engine from moving. Also had to heat the nut with a propane <br>
torch. Wood block splintered, so used a 5&quot; socket extension between <b=
r>
counterweight tip and bottom right rear plate corner. Recommend using <br>
edge area of rear plate that is not used in your application, just in <br>
case it breaks off.=C2=A0 Evidence of threadlocker on both front bolt and b=
ig <br>
nut. Required a rivet gun with mushroom head on the rear shaft to get <br>
the counterweight off.<br>
<br>
Interesting that he rebuild uTube videos I&#39;ve been watching do not <br>
mention threadlocker=C2=A0 on front bolt and rear nut.<br>
<br>
Anticipate several days of cleaning before I&#39;ll know what to order.<br>
<br>
I wonder if the $80 &quot;reusable&quot; o-ring kit on eBay is junk or if s=
afe to use.<br>
<br>
Finn<br>
<br>
--<br>
Homepage:=C2=A0 <a href=3D"http://www.flyrotary.com/" rel=3D"noreferrer nor=
eferrer" target=3D"_blank">http://www.flyrotary.com/</a><br>
Archive and UnSub:=C2=A0 =C2=A0<a href=3D"http://mail.lancaironline.net:81/=
lists/flyrotary/List.html" rel=3D"noreferrer noreferrer" target=3D"_blank">=
http://mail.lancaironline.net:81/lists/flyrotary/List.html</a><br>
</blockquote></div>

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