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[220.235.100.4]) by smtp.gmail.com with ESMTPSA id c14sm10138661pfm.169.2022.01.28.16.32.48 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 28 Jan 2022 16:32:49 -0800 (PST) Content-Type: multipart/alternative; boundary="Apple-Mail=_13E5BE62-24E1-4532-9732-DAB62AB05F58" Mime-Version: 1.0 (Mac OS X Mail 15.0 \(3693.40.0.1.81\)) Subject: Re: [FlyRotary] One Rotor on my RX-8 engine may quit firing very intermittently Date: Sat, 29 Jan 2022 08:32:44 +0800 References: To: Rotary motors in aircraft In-Reply-To: Message-Id: <1127E834-72FF-4DC5-85D3-0C8F64C23B63@gmail.com> X-Mailer: Apple Mail (2.3693.40.0.1.81) --Apple-Mail=_13E5BE62-24E1-4532-9732-DAB62AB05F58 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 In relation to processors memory life cycle. Probably a useful question = might be - What are we seeing as far as numbers of older ecu controlled = cars dying by the side of the road. Certainly some memory technology has shorter life cycles but I don't = think that is a significant risk in the PIC processors and code = implementation that Tracy used. Could it be that the removal process and flexing of pcb=E2=80=99s could = induce more risk of failure. Steve Izett. > On 28 Jan 2022, at 10:32 pm, Finn Lassen finn.lassen@verizon.net = wrote: >=20 > OK, so it's probably not the plugs. I've been searching the archive to = find the recommended colder plugs. There's talk about NGK-10, whatever = that is and also Autolite AR2592 and BR10EIX but still not sure what the = longest lasting ones are. >=20 > Haven't really heard that flash ROM and RAM would go bad over time. > If you do decide to burn new chips, do it by copying the old chips. = Don't know if you can also copy over the EEPROM data too (tuning data). = But that would save you from having to retune everything. Cost of chips = and PICKit 2 or 3 should still be well under $100. I still don't know if = Microchip provides a service where you send in chips and they duplicate = them. >=20 > Finn >=20 > On 1/27/2022 11:23 PM, Dennis Haverlah clouduster@austin.rr.com = wrote: >> Hi Finn >> =20 >> I am using NGK plugs RE7C-L 6700 and RE9B-T 6701. I use unleaded 87 = Octane car gas =E2=80=93 alcohol but no lead and normally go 100 =E2=80=93= 150 hours on a set of plugs. The current plugs were installed about 15 = hours ago. >> =20 >> My EC-2 controller is about 20 years old. My son-in-law Brayton = Hackbarth and I are considering burning new A and B chips because RAM = and flash ROM doesn=E2=80=99t last forever. What do you think of this? = We estimate cost to be about $250-$300 total. >> =20 >> Per Jeff Whaley - we are also going to check to make sure the A & B = chips are completely inserted in the sockets.=20 >> =20 >> We will look for any cracks on the circuit board traces also. >> =20 >> Dennis Havelah >> =20 >> Sent from Mail for = Windows >> =20 >> From: Finn Lassen finn.lassen@verizon.net = >> Sent: Wednesday, January 26, 2022 9:28 PM >> To: Rotary motors in aircraft >> Subject: [FlyRotary] Re: One Rotor on my RX-8 engine may quit = firingvery intermittantly >> =20 >> Which plugs are you using and how many hours on them? >>=20 >> Finn >>=20 >> On 1/26/2022 9:17 PM, Dennis Haverlah clouduster@austin.rr.com = wrote: >> I have an RX-8 in my RV-7a with Tracy=E2=80=99s EC-2 and EM-2. = Recently while cruising the engine lost some power and went into a rough = mode. It only lasted about 2 seconds and returned to smooth running as = soon as I switched to the B controller. I landed and have been running = it on the ground to determine the cause. It has occurred 3 or 4 more = times and only lasts seconds. I believe I have determined that one = rotor quits firing when it runs rough. >> =20 >> Has anyone else experienced this problem and is there a fix? >> =20 >> Thanks >> Dennis Haverlah >> =20 >> Sent from Mail for = Windows >> =20 >> =20 >>=20 >> =20 >> = =09 >> Virus-free. www.avast.com = >> =20 >> =20 >=20 >=20 --Apple-Mail=_13E5BE62-24E1-4532-9732-DAB62AB05F58 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 In = relation to processors memory life cycle. Probably a useful question = might be - What are we seeing as far as numbers of older ecu controlled = cars dying by the side of the road.
Certainly some memory = technology has shorter life cycles but I don't think that is a = significant risk in the PIC processors and code implementation that = Tracy used.
Could it be that the removal process = and flexing of pcb=E2=80=99s could induce more risk of = failure.

Steve = Izett.

On 28 Jan 2022, at 10:32 pm, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:

OK, so it's probably not the plugs. I've been = searching the archive to find the recommended colder plugs. There's talk = about NGK-10, whatever that is and also Autolite AR2592 and BR10EIX but = still not sure what the longest lasting ones are.

Haven't really heard that flash ROM and RAM would go bad over = time.
If you do decide to burn new chips, do it by copying = the old chips. Don't know if you can also copy over the EEPROM data too = (tuning data). But that would save you from having to retune everything. = Cost of chips and PICKit 2 or 3 should still be well under $100. I still = don't know if Microchip provides a service where you send in chips and = they duplicate them.

Finn

On 1/27/2022 11:23 PM, Dennis Haverlah clouduster@austin.rr.com wrote:
Hi Finn
 
I am using NGK plugs = RE7C-L 6700 and RE9B-T 6701.  I use unleaded 87 Octane car gas =E2=80= =93 alcohol but no lead and normally go 100 =E2=80=93 150 hours on a set = of plugs.  The current plugs were installed about 15 hours = ago.
 
My EC-2 controller is about 20 years old.  = My son-in-law Brayton Hackbarth and I are considering burning new A and = B chips because RAM and flash ROM doesn=E2=80=99t last = forever.   What do you think of this?  We estimate cost = to be about $250-$300 total.
 
Per Jeff Whaley - we are = also going to check to make sure the A & B chips are completely = inserted in the sockets. 
 
We will look for any = cracks on the circuit board traces also.
 
Dennis Havelah
 
Sent from Mail for Windows
 
From: Finn = Lassen finn.lassen@verizon.net
Sent: Wednesday, January 26, = 2022 9:28 PM
To: Rotary = motors in aircraft
Subject: [FlyRotary] Re: One = Rotor on my RX-8 engine may quit firingvery = intermittantly
 
Which plugs are you using and how many hours on = them?

Finn

On = 1/26/2022 9:17 PM, Dennis Haverlah clouduster@austin.rr.com wrote:
I have an RX-8 in my RV-7a with Tracy=E2=80=99s = EC-2 and EM-2.  Recently while cruising the engine lost some power = and went into a rough mode.   It only lasted about 2 seconds = and returned to smooth running as soon as I switched to the B = controller.   I landed and have been running it on the ground = to determine the cause.  It has occurred 3 or 4 more times and only = lasts seconds.  I believe I have determined that one rotor quits = firing when it runs rough.
 
Has anyone else experienced this problem and is there a = fix?
 
Thanks
Dennis Haverlah
 
Sent from Mail for Windows
 

 

 
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