X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) X-Junk-Score: 0 [] X-KAS-Score: 0 [] From: "Charlie England ceengland7@gmail.com" Received: from mail-yb1-f181.google.com ([209.85.219.181] verified) by logan.com (CommuniGate Pro SMTP 6.3.18) with ESMTPS id 2062544 for flyrotary@lancaironline.net; Thu, 25 May 2023 16:51:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.219.181; envelope-from=ceengland7@gmail.com Received: by mail-yb1-f181.google.com with SMTP id 3f1490d57ef6-bacf5b89da7so182709276.2 for ; Thu, 25 May 2023 13:51:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1685047868; x=1687639868; h=in-reply-to:from:references:to:content-language:subject:user-agent :mime-version:date:message-id:from:to:cc:subject:date:message-id :reply-to; bh=WomIVgR9GDeWBQNsGWrdW8heC7oxN0rBl71INuUC3FE=; b=ZdiP72fkdwX0JWbtlZ0w7HZamIeHyfp0vnV9X/C1Nk7wgek4Ww4UlY50bDQlLSu7wT RQ/Gn4nbSos0g6s62A8OqoqpNHlwUUx7wCan1jQToHmBG6nxnsFLTo5tcB4lj9PCfUc6 DbYawbQ0qjNT5qbvSvZfpjGvLwdUuyQ9DZqnWXJ21M+tFX5j5qvTNRsZKEJ3vRQo0Z4X We3ydae7XkIasETnx3D/OStmf7HCT7qiwiZKY8y0bkIraKcjXXD+yjAj/6zjR2vJFP1W droFoqb/H5snRetJCnycTU8wphYpFPFbPV13PCOZYE9ICpBtg2R4H4Rrt7trB3PARGtu 5rzA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685047868; x=1687639868; h=in-reply-to:from:references:to:content-language:subject:user-agent :mime-version:date:message-id:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=WomIVgR9GDeWBQNsGWrdW8heC7oxN0rBl71INuUC3FE=; b=iYStTbIaUW2RHnToUT3sG7EZ1o5PpXT7xqNAqL7mqZvp9d//jzljoBC40I8xqiOxMq vbgjc728yPVkxdsIu2ioaF3VHb4Cyj6iRl/0m1b6NuKVc16zrNpLzPSTN9nsOWXEFPJI bxVv710/Pq6nbQ/D3L6jODDSaV9PL35KVfXED33DLMjH8gtW6HUUfWSumxdMJ5Fmosxk 5XGnBXy5HCa1wSaiM+dhUbWcdUPpADQXgTUkvvJrXUIQ8ohLX5m4Dzv08qef4dMs4d8t +SfYhVdKQWLUBs1e0Egaox572qEdHKj6901qQi9ii5LJhHEMEAb2itEVXG/tkZjNL6IC rhow== X-Gm-Message-State: AC+VfDzjOfzuFHwvpZ02SiksyqeE6pW0rDVsWa9h8o6Ia2ZkKYc7rXhC PnxYvhR5TKWLoGhDZTF9a7bbC2f343I= X-Google-Smtp-Source: ACHHUZ4tGisl/BrRJoe0ndBojeZrjvbZuthUm/+zfml6TCBWWtCNicWt6oiZNVLqt5/5qlGe+La0fQ== X-Received: by 2002:a25:748a:0:b0:ba8:fe6:8e3f with SMTP id p132-20020a25748a000000b00ba80fe68e3fmr4859563ybc.5.1685047867955; Thu, 25 May 2023 13:51:07 -0700 (PDT) Return-Path: Received: from [192.168.1.143] ([50.86.156.24]) by smtp.googlemail.com with ESMTPSA id t38-20020a25aaa9000000b00ba81e857711sm554130ybi.34.2023.05.25.13.51.07 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 May 2023 13:51:07 -0700 (PDT) Content-Type: multipart/alternative; boundary="------------JTCsjCJmGD0G7nCwP9sLqZzW" Message-ID: <6464ce7c-df27-fd0c-b233-a7436bcf1f0f@gmail.com> Date: Thu, 25 May 2023 15:54:14 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [FlyRotary] Re: AR2592 gap Content-Language: en-US To: Rotary motors in aircraft References: In-Reply-To: X-Antivirus: Avast (VPS 230525-16, 5/25/2023), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. --------------JTCsjCJmGD0G7nCwP9sLqZzW Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Steve Boese did a scientific analysis years ago on what happens to the plugs as they start to break down. I *think* he did a presentation at one of our Roundups, but I can't find the document in any of my records at the moment. IIRC, it had to do with the insulator around the center electrode starting to break down (fail) from the heat. Hopefully, Steve will see his name & respond. Charlie On 5/25/2023 3:20 PM, Finn Lassen finn.lassen@verizon.net wrote: > Thanks Ed. > But I've not been running AvGas at all. Only 87 10% ethanol pump gas. > I  bought the AR2592 plugs as recommended replacements. > > Now having watched some youtube videos I may try cleaning the stock > plugs in my ultrasound cleaner. > > Found one site that claims the RX-8 gap is 1.2mm. So now I don't know > why the AR2592 plugs with their 0.6mm gap are recommended. > > Finn > > On 5/25/2023 3:25 PM, eanderson@carolina.rr.com wrote: >> Finn, >> >> That sounds a lot like the onset of rpm drop caused by lead fouled >> plugs.  I used to get around 100 hrs and then would start getting >> Sparkplug SAG  (engine rpm dropping off).  It seem to get worst >> during high power (such as take off) engine regimes. >> >> Regapping did not help and I never found a way of removing the lead >> suspected of providing a grounding path inside the plug. >> >>   I would recommend a new set of plugs. >> >> Ed >> >> >> ------ Original Message ------ >> From "Finn Lassen finn.lassen@verizon.net" >> To "Rotary motors in aircraft" >> Date 5/25/2023 9:13:07 AM >> Subject [FlyRotary] AR2592 gap >> >>> For those of you who use the AR2592 spark plug in the Renesis, do >>> you use the 0.6mm gap the plug comes with? I bought 8 of them some >>> years ago. >>> I've been using the stock plugs (RE7A and RE9B) for maybe 100 hours >>> by now. Experienced a brief 200 RPM drop on last takeoff Wondering >>> if it's time to change plugs. Or re-gap the stock plugs to what? >>> What can I learn by looking at plugs? >>> Best way to clean them? >>> Finn > > -- This email has been checked for viruses by Avast antivirus software. www.avast.com --------------JTCsjCJmGD0G7nCwP9sLqZzW Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit
Steve Boese did a scientific analysis years ago on what happens to the plugs as they start to break down. I *think* he did a presentation at one of our Roundups, but I can't find the document in any of my records at the moment. IIRC, it had to do with the insulator around the center electrode starting to break down (fail) from the heat. Hopefully, Steve will see his name & respond.

Charlie

On 5/25/2023 3:20 PM, Finn Lassen finn.lassen@verizon.net wrote:
Thanks Ed.
But I've not been running AvGas at all. Only 87 10% ethanol pump gas.
I  bought the AR2592 plugs as recommended replacements.

Now having watched some youtube videos I may try cleaning the stock plugs in my ultrasound cleaner.

Found one site that claims the RX-8 gap is 1.2mm. So now I don't know why the AR2592 plugs with their 0.6mm gap are recommended.

Finn

On 5/25/2023 3:25 PM, eanderson@carolina.rr.com wrote:
Finn,

That sounds a lot like the onset of rpm drop caused by lead fouled plugs.  I used to get around 100 hrs and then would start getting Sparkplug SAG  (engine rpm dropping off).  It seem to get worst during high power (such as take off) engine regimes.  

Regapping did not help and I never found a way of removing the lead suspected of providing a grounding path inside the plug.

  I would recommend a new set of plugs.

Ed


------ Original Message ------
To "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Date 5/25/2023 9:13:07 AM
Subject [FlyRotary] AR2592 gap

For those of you who use the AR2592 spark plug in the Renesis, do you use the 0.6mm gap the plug comes with? I bought 8 of them some years ago.
 
I've been using the stock plugs (RE7A and RE9B) for maybe 100 hours by now. Experienced a brief 200 RPM drop on last takeoff Wondering if it's time to change plugs. Or re-gap the stock plugs to what?
 
What can I learn by looking at plugs?
 
Best way to clean them?
 
Finn
 
 
 




Virus-free.www.avast.com
--------------JTCsjCJmGD0G7nCwP9sLqZzW--