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[220.235.100.4]) by smtp.gmail.com with ESMTPSA id b14-20020a056a000cce00b004e19bc1e81bsm18381255pfv.18.2022.03.01.13.00.28 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 01 Mar 2022 13:00:30 -0800 (PST) Content-Type: multipart/alternative; boundary="Apple-Mail=_3B80F64F-E10D-4B27-BAF5-5A915C5D152F" Mime-Version: 1.0 (Mac OS X Mail 15.0 \(3693.40.0.1.81\)) Subject: Re: [FlyRotary] Timing Date: Wed, 2 Mar 2022 05:00:26 +0800 References: To: Rotary motors in aircraft In-Reply-To: Message-Id: X-Mailer: Apple Mail (2.3693.40.0.1.81) --Apple-Mail=_3B80F64F-E10D-4B27-BAF5-5A915C5D152F Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Thanks Neil Steve > On 2 Mar 2022, at 4:50 am, 12348ung@gmail.com = wrote: >=20 > Steve, > The fuel tech timing from memory is still only = about 18 degrees BTDC at full noise. > Neil. > =20 > From: Rotary motors in aircraft >=20 > Sent: Tuesday, March 1, 2022 8:57 PM > To: Rotary motors in aircraft > > Subject: [FlyRotary] Re: Timing > =20 > Hi Guys > =20 > I realised I made a mistake with reading the timing. > I was adding the 5 deg ATDC, instead of adding -5 deg.=20 > =20 > Today I sought to check the maximum advance of the timing. > Nearly blew Dad of the front of the Glasair! > With the prop pitch full fine the manifold pressure was only 14.5=E2=80=99= =20 > At 5000 rpm it appeared the advance had maxed out at approx 23 deg = BTDC. > At 1750rpm idle timing was approx 8 deg BTDC > =20 > I will now try and fine tune the timing in flight and see if can take = any further advance. > Can anyone comment on their maximum advance of their timing? > =20 > Thanks > =20 > Steve Izett > =20 > =20 > =20 >=20 >=20 > On 26 Feb 2022, at 10:17 am, Stephen Izett stephen.izett@gmail.com = > wrote: > =20 > Thanks Dave. >=20 > I=E2=80=99m guessing a feature like that adjusts the flash and enables = you to dial in what you want and then your just looking for the = reference marks to line up. > I would imagine that makes it easier instead of having to mark out = whatever your reading from. >=20 > I=E2=80=99d still like to have a definitive process to move forward = with from Tracy as the designer. >=20 > Cheers >=20 > Steve >=20 >=20 > On 26 Feb 2022, at 8:00 am, Pam & Dave Williams padajute@idcnet.com = > wrote: >=20 > Hello Steve, >=20 > I used the stock timing marks with a timing light. My timing light has = an advance\retard feature. Yes very windy!!! >=20 > Thanks, > Dave Williams >=20 > -----Original Message----- > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net = ]=20 > Sent: Thursday, February 24, 2022 4:43 PM > To: Rotary motors in aircraft > > Subject: [FlyRotary] Re: Timing >=20 > Thanks guys. >=20 > Dave, did your measure the timing with a timing light and with the = prop on? > Must have been pretty windy getting that data! >=20 > I=E2=80=99ll mark up the ring gear with a TDC mark this morning and = measure the current EC2 base Mode timing >=20 > Which method do people prefer to get TDC? I think I have read about = these 3 methods. > 1. Rotor #1 equal Screwdriver depth to rotor face through both plug = holes 2. Rotor #1 volume null using water in a tube - I think this might = be from Lynn H 3. Rotor #2 bisecting Apex seal across T & L spark plug = hole >=20 > Can anyone else tell us their nominal timing at idle. Ours is = ~1800rpm.=20 > And particularly anyone running a 4 port renesis like Tracy=E2=80=99s = RV4. >=20 > Cheers >=20 > Steve >=20 >=20 > On 25 Feb 2022, at 6:07 am, Pam & Dave Williams padajute@idcnet.com = > wrote: >=20 > Hello Steve, >=20 > My timing is locked in at 35 degrees before top dead center from idle = to 6500 RPM. You are on the right track because retarded timing will = raise exhaust temperature. I have a 13b with Tracy's EC2\EM2 and the = RD-1AB redrive.=20 >=20 > Thanks > Dave Williams >=20 > -----Original Message----- > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net = ] > Sent: Wednesday, February 23, 2022 6:45 PM > To: Rotary motors in aircraft > > Subject: [FlyRotary] Timing >=20 >=20 > Hi friends >=20 > On my last flight I experienced high indicated EGT=E2=80=99s so as = part of looking into this I would like to check my timing. >=20 > I have a Renesis engine and Tracy=E2=80=99s EC2.=20 > In his A8 (Renesis) version of the handbook under Mode#8 Timing = Adjustment it says to refer to =E2=80=98Initial Timing Adjustment=E2=80=99= , however I can=E2=80=99t find any such instructions in this version, = probably because it has a fixed position CAS.=20 > Can anyone enlighten me on what the static timing should at a given = idle rpm? >=20 > Much appreciated. >=20 > Steve Izett >=20 >=20 > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html = >=20 >=20 > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html = >=20 >=20 > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html = >=20 >=20 > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html = >=20 >=20 > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html = --Apple-Mail=_3B80F64F-E10D-4B27-BAF5-5A915C5D152F Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Thanks Neil

Steve


On 2 Mar = 2022, at 4:50 am, 12348ung@gmail.com <flyrotary@lancaironline.net> wrote:

Steve,
          &nb= sp;        The fuel tech timing from = memory is still only about 18 degrees BTDC at full noise.
Neil.
 
From: Rotary motors in aircraft = <flyrotary@lancaironline.net> 
Sent: Tuesday, March 1, 2022 8:57 = PM
To: Rotary motors in aircraft = <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Timing
 
Hi Guys
 
I = realised I made a mistake with reading the timing.
I was = adding the 5 deg ATDC, instead of adding -5 deg. 
 
Today = I sought to check the maximum advance of the timing.
Nearly = blew Dad of the front of the Glasair!
With the = prop pitch full fine the manifold pressure was only 14.5=E2=80=99 
At = 5000 rpm it appeared the advance had maxed out at approx 23 deg = BTDC.
At 1750rpm idle timing was approx 8 deg BTDC
 
I = will now try and fine tune the timing in flight and see if can take any = further advance.
Can anyone comment on their maximum advance of = their timing?
 
Thanks
 
Steve = Izett
 
 
 


On 26 Feb 2022, at 10:17 am, Stephen = Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
 
Thanks Dave.

I=E2=80=99m = guessing a feature like that adjusts the flash and enables you to dial = in what you want and then your just looking for the reference marks to = line up.
I would imagine that makes it easier instead of = having to mark out whatever your reading from.

I=E2=80=99d still like to have a definitive process to move = forward with from Tracy as the designer.

Cheers

Steve


On 26 Feb 2022, at 8:00 am, Pam & = Dave Williams padajute@idcnet.com <flyrotary@lancaironline.net> wrote:

Hello Steve,

I used the stock = timing marks with a timing light. My timing light has an advance\retard = feature. Yes very windy!!!

Thanks,
Dave Williams

-----Original = Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] 
Sent: = Thursday, February 24, 2022 4:43 PM
To: Rotary motors in = aircraft <flyrotary@lancaironline.net>
Subject: = [FlyRotary] Re: Timing

Thanks guys.

Dave, did your measure the timing with a = timing light and with the prop on?
Must have been pretty = windy getting that data!

I=E2=80=99ll mark = up the ring gear with a TDC mark this morning and measure the current = EC2 base Mode timing

Which method do people = prefer to get TDC? I think I have read about these 3 methods.
1. Rotor #1 equal Screwdriver depth to rotor face through = both plug holes 2. Rotor #1 volume null using water in a tube - I think = this might be from Lynn H 3. Rotor #2 bisecting Apex seal across T & = L spark plug hole

Can anyone else tell us = their nominal timing at idle. Ours is ~1800rpm. 
And = particularly anyone running a 4 port renesis like Tracy=E2=80=99s = RV4.

Cheers

Steve


On 25 Feb 2022, at 6:07 am, Pam & Dave Williams padajute@idcnet.com<flyrotary@lancaironline.net> wrote:

Hello Steve,

My timing is locked = in at 35 degrees before top dead center from idle to 6500 RPM. You are = on the right track because retarded timing will raise exhaust = temperature. I have a 13b with Tracy's EC2\EM2 and the RD-1AB = redrive. 

Thanks
Dave Williams

-----Original Message-----
From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: = Wednesday, February 23, 2022 6:45 PM
To: Rotary motors in = aircraft <flyrotary@lancaironline.net>
Subject: = [FlyRotary] Timing


Hi = friends

On my last flight I experienced = high indicated EGT=E2=80=99s so as part of looking into this I would = like to check my timing.

I have a Renesis = engine and Tracy=E2=80=99s EC2. 
In his A8 = (Renesis) version of the handbook under Mode#8 Timing Adjustment it says = to refer to =E2=80=98Initial Timing Adjustment=E2=80=99, however I = can=E2=80=99t find any such instructions in this version, probably = because it has a fixed position CAS. 
Can anyone = enlighten me on what the static timing should at a given idle rpm?

Much appreciated.

Steve Izett


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