---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 02/18/16: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:35 AM - Re: Re: LED wig-wag (Robert L. Nuckolls, III) 2. 06:05 AM - Re: LED wig-wag (Eric M. Jones) 3. 11:33 AM - Re: Re: S702-1 Intermittent Duty Starter Contactor...pedigree (Jeff Page) 4. 12:40 PM - Starter engaged warning lights (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 05:35:27 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: LED wig-wag At 02:04 PM 2/17/2016, you wrote: > >Bob, > Yes I am. What is your email? I tried sending you the offer at your email address in the header but it bounced as no-such-user-name-found. You can email me using the address in the header of this message. Bob . . . ________________________________ Message 2 _____________________________________ Time: 06:05:36 AM PST US Subject: AeroElectric-List: Re: LED wig-wag From: "Eric M. Jones" Automotive conversion WWs depend on the lamp filament resistance to tell the user if a lamp has failed. Perihelion Design's WWs don't use this system. We have sold WWs in two types AND in 28V types for a decade. I even sell 2X frequency Europa WWs for a single lamp. They work fine with LEDs and HIDs and Incandescents. The WW(D) includes the switch (and I now include a free switch guard!). The WW(C) is without the switch. Eric -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones(at)charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=452953#452953 Attachments: http://forums.matronics.com//files/wigwag_module_d1manual_105.pdf http://forums.matronics.com//files/wigwag_module_manual_c_200.pdf ________________________________ Message 3 _____________________________________ Time: 11:33:41 AM PST US From: Jeff Page Subject: Re: AeroElectric-List: Re: S702-1 Intermittent Duty Starter Contactor...pedigree Some were mentioning using the I terminal to indicate a contractor stuck, and thus the starter engaged, which would not indicate a mechanical malfunction that was spinning the starter. This is just an idea that someone with more start motor experience than I can tell us if it is workable. What about wiring an indicator to the feed from the contactor to the starter. Perhaps the rotating starter would act as a generator to power the indicator. This would not work for starters that had another built in contactor, but perhaps there are starters this would work for ? Although relatively rare, having the starter and flywheel teeth jam and break in flight might make for a "stormy night" story :-( Jeff Page Dream Aircraft Tundra #10 ________________________________ Message 4 _____________________________________ Time: 12:40:30 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Starter engaged warning lights > >Although relatively rare, having the starter and flywheel teeth jam >and break in flight might make for a "stormy night" story :-( Not sure how much of a risk this is. Every starter I'm aware of has an over-running clutch built onto the pinion gear shaft. Hangar myths about stuck pinions back driving a starter and turning it into a generator are without merit. Further, the solenoid/contactor configuration of choice features a robust disengagement mechanism. The only 'unintentional engagements' I've heard about over the last 20 years have involved stuck contactors that kept the pinion gear electrically engaged. One such case involved a aerobatic performance airplane at OSH where the entire routine was performed with the starter engaged. While chewed up ring gears and pinons are ugly, they don't represent much of a hazard to the engine or airplane. The strongest prophylactic against these events are a strong battery and a modern, stick-resistant contactor. Most mechanical risk for pinion gear retraction failure have foundation in poor maintenance . . . a 'hard stick' is going to be preceded by a series of tentative sticks. Just keep the shaft clean and watch the pinion gear teeth for changes in wear patterns. Bob . . . ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-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/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-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.