---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sun 02/04/24: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:50 AM - Re: Mag Timing CD5 (Richard Goode) 2. 10:51 AM - Mag timing tests (Craig Payne) ________________________________ Message 1 _____________________________________ Time: 02:50:43 AM PST US From: "Richard Goode" Subject: RE: Yak-List: Mag Timing CD5 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 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 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 > 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 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 > 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 - The Yak-List Email Forum - --> http://www.matronics.com/Navigator?Yak-List - MATRONICS WEB FORUMS available via the Web Forums! --> http://forums.matronics.com - NEW MATRONICS LIST WIKI Matronics Email List Wiki! --> http://wiki.matronics.com - List Contribution Web Site style='mso-spacerun:yes'> Thank you for your generous style='mso-spacerun:yes'> -Matt Dralle, style='mso-spacerun:yes'> --> https://matronics.com/contribution ________________________________ Message 2 _____________________________________ Time: 10:51:15 AM PST US From: Craig Payne Subject: Yak-List: 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.