---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Wed 11/03/10: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 12:21 AM - November List Fund Raiser (Matt Dralle) 1. 07:09 AM - Barrett M14P/PF Overhaul Specifications and Mods (Rhonda Bewley) ________________________________ Message 0 _____________________________________ Time: 12:21:13 AM PST US From: Matt Dralle Subject: Yak-List: November List Fund Raiser There is an automatic "squelch button" of sorts for the Fund Raiser messages. Here's how it works... As soon as a List member makes a Contribution through the Matronics Fund Raiser web site, they will instantly cease to receive these Fund Raiser messages for the rest of the month! Its just that simple. I really do appreciate each and every one of your individual Contributions to support the Lists. It is your support that enables me to upgrade the hardware and software that are required to run a List Site such as this one. It also goes to pay for the commercial-grade Internet connection and to pay the huge electric bill to keep the computer gear running and the air conditioner powered on. I run all of the Matronics Email List and Forums sites here locally which allows me to control and monitor every aspect of the system for the utmost in reliably and performance. Your personal Contribution matters because, when combined with other Listers such as yourself, it pays the bills to keep this site up and running. I accept exactly ZERO advertising dollars for the Matronics Lists sites. I can't stand the pop-up ads and all other commercials that are so prevalent on the Internet these days and I particularly don't want to have it on my Email List sites. If you appreciate the ad-free, grass-roots, down-home feel of the Matronics Email Lists, please make a Contribution to keep it that way!! http://www.matronics.com/contribution Thank you! Matt Dralle Matronics Email List Administrator [Note that there are certain circumstances where you might still see a Contribution related message. For example, if someone replies to one of the messages, when using the List Browse feature, or when accessing List message via the Forum. The system keys on the given email address and since most of these are anonymous public access methods, there is no simple way to filter them.] ________________________________ Message 1 _____________________________________ Time: 07:09:27 AM PST US Subject: Yak-List: Barrett M14P/PF Overhaul Specifications and Mods From: "Rhonda Bewley" Listers: I have recently received some requests for information regarding our M14P modifications. We have been in development of our M14P overhaul process for the last several years. It has been quite an interesting project, and we have been delivering engines for the last 2 years. Our concept was to develop a very high standard of overhaul, such as we offer for horizontally opposed engines. We currently offer complete overhaul capability and prop strike inspections. To my knowledge, we have the only test cell in North America that can operate the engine to full power and measure its power output and fuel consumption. Measured thrust tests with our M14-P engines indicate that a -P engine, modified as described below, produces more thrust that the -PF model and does it on less fuel. The highest time modified M14-P engine we have in service has 400 hours and is used in airshows. The major modifications to the engine include the following: * Newly designed, three ring, forged piston available in both standard and slightly higher compression. We have had this piston/ring package for two years, and Motorstar's ring package appears remarkably similar. The alloy used in our forging has a lower thermal coefficient of expansion and therefore can be operated at reduced clearances which increases piston ring service life, reduces blow by and oil consumption. Customers have reported a reduction in oil consumption from over a quart/hour down to a quart in 8-10 hours, with the oil staying clean through the whole oil change interval. We are not currently offering high compression options for PF owners, because we want to be able to obtain test data in our newly constructed test cell. * Single port fuel injection through Airflow Performance. We have dialed this system in and are getting good results with it. There are some airframe mods which are the responsibility of the owner/operator but they are easily accomplished, and we can provide some technical support. * A special micro-finish of the nose case gears to aide in keeping oil temps down, especially important as we start to raise compression in the engine. This process is extremely effective and has been taken from NASCAR, as those folks have tremendous gearbox oil temperature issues. We have also developed repair procedures to return impossible to get parts to serviceable status. These include master rod bearings, nose case sleeve, link rod pins, and a nickel-sil reconditioning of cylinder barrels which are worn to maximum limits. The nickel-sil barrels are currently being tested. Additionally, there are a number of parts which we are seeking to manufacture which are difficult/impossible to obtain via standard resources. One of the exciting projects on the horizon is electronic ignition. We currently have three prototypes built and are preparing for testing in our test cell. We had hoped that the system would be available by late fall, but it appears that we are probably one year away from delivery. I do not have any anticipated costs for the new system at this time. If you would like any additional information regarding this program, please feel free to direct questions to Monty (monty@bpaengines.com), Allen (bpa@bpaengines.com) or myself (Rhonda@bpaengines.com). Rhonda Barrett-Bewley Barrett Precision Engines, Inc. 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