Today's Message Index:
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1. 02:50 AM - Re: Mag Timing CD5 (Richard Goode)
2. 10:51 AM - Mag timing tests (Craig Payne)
Message 1
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I am afraid not precisely. Of course the CD-5 has internal advance like
the M9-35M Russian magneto but I'm afraid at the weekend I simply don't
know whether, like the Russian magneto, there are different "series"
stamped onto the side of the magneto giving different degrees of
advance. But I assume you have the Chinese maintenance manual which
covers magneto timing in detail. If not please send us an email and we
will send you the link to download the manual =93 this is a free
service for anyone who could be interested. Richard.
RICHARD GOODE AEROBATICS
Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
Tel: +44 (0)1544 340120
e-mail: richard.goode@russianaeros.com
<mailto:richard.goode@russianaeros.com>
<http://www.russianaeros.com/> www.russianaeros.com
WORLD LEADERS IN EAST EUROPEAN & CHINESE RADIAL AIRCRAFT ENGINES
In partnership with Aerometal Kft, Hungary.
From: owner-yak-list-server@matronics.com
<owner-yak-list-server@matronics.com> On Behalf Of Justin Drafts
Sent: 04 February 2024 06:22
Subject: Re: Yak-List: Mag Timing CD5
Very good document Richard, thanks!
Do you have such a document for the Chinese Housai?
Thanks,
Justin Drafts
N280NC
On Sat, Feb 3, 2024 at 3:50=AFAM Richard Goode
<richard.goode@russianaeros.com <mailto:richard.goode@russianaeros.com>
> wrote:
It is not quite so simple =93 but the attached paper might help!
Richard
RICHARD GOODE AEROBATICS
Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
e-mail: richard.goode@russianaeros.com
<mailto:richard.goode@russianaeros.com>
<http://www.russianaeros.com/> www.russianaeros.com
WORLD LEADERS IN SOVIET & CHINESE RADIAL AIRCRAFT ENGINES
In partnership with Aerometal Kft, Hungary.
-----Original Message-----
From: owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com>
<owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com> > On Behalf Of glipaz
Sent: 02 February 2024 17:52
Subject: Yak-List: Mag Timing CD5
glipaz@yahoo.com>
Brain trust:
I know that on an M-14p with a Russian M9F magneto, timing on the prop
is set at 14-16* BTDC. This translates to around 22-24* BTDC on the
crank.
Assuming an M-14p motor with CD-5 (Chinese)magnetos stamped 25*, what is
the proper angle on the prop BTDC?
According to Craig Payne=C3=A2=82=AC=84=A2s chart for this
configuration it suggests 8.8* BTDC on the crank and 5.8* BTDC on the
prop. I don=C3=A2=82=AC=84=A2t understand this figure.
Gil
Read this topic online here:
<http://forums.matronics.com/viewtopic.php?p=513186#513186>
http://forums.matronics.com/viewtopic.php?p=513186#513186
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Message 2
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| Subject: | Mag timing tests |
Note that total advance for the M-14P is specified as 24 degrees using the
M9F mag but the Chinese chose to spec only the static starting setting,
leaving open the question of how much advance is too much. Some clues are
provided in the setting chart for different CD-5 versions where up to 27
degrees is called out. My experience makes me believe that the practical
max is 28 degrees.
I have pushed the total advance up to 32 degrees but it seemed only to
benefit above 9500 MSL where thinner air, hence the mixture, burns slower.
A final note: use of the CD-5 with the M-14P helps starting and smooth
running at lower to mid RPMs but really made no difference for me on the
M-14P at 80 percent and above power settings until I installed electronic
ignition on the right mag.
Craig Payne
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