---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Tue 04/05/16: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:42 AM - MT vs. Whirlwind (Jay Hodge) 2. 08:16 AM - Re: MT vs. Whirlwind (Richard Goode) 3. 09:51 AM - MT vs. Whirlwind (Sam Sax) 4. 07:30 PM - Re: High CHTs HS6A - on one mag (JL2A) 5. 08:14 PM - Re: Re: High CHTs HS6A - on one mag (Roger Kemp) 6. 09:52 PM - Re: Re: High CHTs HS6A - on one mag (Walter Lannon) ________________________________ Message 1 _____________________________________ Time: 05:42:15 AM PST US Subject: Yak-List: MT vs. Whirlwind From: "Jay Hodge" Hey Guys, I just bought a Yak 55 M that has a MT 3 prop on it. Thinking about a MT9 or Whirlwind. Thoughts? Jay Read this topic online here: http://forums.matronics.com/viewtopic.php?p=454562#454562 ________________________________ Message 2 _____________________________________ Time: 08:16:21 AM PST US From: "Richard Goode" Subject: RE: Yak-List: MT vs. Whirlwind Whatever the other qualities of the two manufacturers might be, a critically important issue as far as I am concerned is that MT propellers are fully certificated. This means that they have to go through a rigorous testing schedule, involving a very significant overspeed for quite a long time. I say this with some feeling, having had propeller failure (with another manufacturer of variable-pitch propellers) in which a counterweight came off and removed half of one blade. I would not wish this on anyone, and very fortunately I was overhead an airfield practising aerobatics and was able to land quickly. But various instruments were broken, and the vibration quite incredible. Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Jay Hodge Sent: 05 April 2016 13:41 Subject: Yak-List: MT vs. Whirlwind Hey Guys, I just bought a Yak 55 M that has a MT 3 prop on it. Thinking about a MT9 or Whirlwind. Thoughts? Jay Read this topic online here: http://forums.matronics.com/viewtopic.php?p=454562#454562 -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ________________________________ Message 3 _____________________________________ Time: 09:51:52 AM PST US From: "Sam Sax" Subject: Yak-List: MT vs. Whirlwind Hi Jay, I have been flying the Whirlwind 3 Bladed Prop since 1999 and upgraded to their latest model (all composite) in 2014. I fly a lot of formation and Acro as much as the CJ can take. They may have had some issues in the past but none for years and I had Zero issues and actually, I Love this prop - not only it looks great, it performs amazingly well. There are quite a few flying in the U.S, you might want to take a hop with a Whirlwind and you'll see what I am talking about. If you'd like more details, call me off list. Not sure if you saw my youtube Product Evaluation video I made a couple years ago about this prop but if not, here is the link to it: https://www.youtube.com/watch?v=2sFFD_XNpa4 If you are based in the U.S, I recommend, hands down, that you seriously consider the Whirlwind... They are based in Ohio and have a great customer service. Sam Sax Miami, FL 305.215.5599 -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Jay Hodge Sent: Tuesday, April 05, 2016 8:41 AM Subject: Yak-List: MT vs. Whirlwind Hey Guys, I just bought a Yak 55 M that has a MT 3 prop on it. Thinking about a MT9 or Whirlwind. Thoughts? Jay Read this topic online here: http://forums.matronics.com/viewtopic.php?p=454562#454562 ________________________________ Message 4 _____________________________________ Time: 07:30:42 PM PST US Subject: Yak-List: Re: High CHTs HS6A - on one mag From: "JL2A" checked timing, left mag was 2.5C BTDC the RH 3.5C BTDC! They are 24 mags. Yikes I think you have probably pointed the finger at the most likely explanation of the CHT drop. Cheers Read this topic online here: http://forums.matronics.com/viewtopic.php?p=454594#454594 ________________________________ Message 5 _____________________________________ Time: 08:14:57 PM PST US Subject: Re: Yak-List: Re: High CHTs HS6A - on one mag From: Roger Kemp Doc Sent from my iPad > On Apr 5, 2016, at 9:29 PM, JL2A wrote: > > > checked timing, left mag was 2.5C BTDC the RH 3.5C BTDC! They are 24 mags. > > Yikes > > I think you have probably pointed the finger at the most likely explanation of the CHT drop. > > Cheers > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=454594#454594 > > > > > > > > > > ________________________________ Message 6 _____________________________________ Time: 09:52:19 PM PST US From: "Walter Lannon" Subject: Re: Yak-List: Re: High CHTs HS6A - on one mag The numbers you have given for the ignition angle are not correct. They are also corrupted by what appears to be a computer glitch. I am referring to the "A(with an accent above) and the C with degree mark. I note the A is also repeated in "they are 24 deg. mags." but not the C. If the "C" is not an error I would interpret that to mean the angles you have given are relative to the crankshaft. If that is the case they are so far out I doubt the engine would run. If that is an error and you are referring to the propellor shaft angle they are still far out of tolerance. Please advise. Rather than give you the numbers from memory I will confirm at the hangar tomorrow and get back to you. Walt -----Original Message----- From: JL2A Sent: Tuesday, April 05, 2016 7:29 PM Subject: Yak-List: Re: High CHTs HS6A - on one mag checked timing, left mag was 2.5C BTDC the RH 3.5C BTDC! They are 24 mags. Yikes I think you have probably pointed the finger at the most likely explanation of the CHT drop. Cheers Read this topic online here: http://forums.matronics.com/viewtopic.php?p=454594#454594 ------------------------------------------------------------------------------------- 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.