Europa-List Digest Archive

Thu 12/06/07


Total Messages Posted: 11



Today's Message Index:
----------------------
 
     1. 12:03 AM - Matronics List Fund Raiser - 2007 List of Contributors (Matt Dralle)
     2. 09:32 AM - Prop Tach Sender (rampil)
     3. 10:44 AM - Re: Prop Tach Sender (Mark Burton)
     4. 11:12 AM - Re: Re: Prop Tach Sender (Terry Seaver (terrys))
     5. 11:25 AM - Re: Prop Tach Sender (Mark Burton)
     6. 11:52 AM - Re: Prop Tach Sender (rampil)
     7. 11:55 AM - Re: Prop Tach Sender (Paul Stewart)
     8. 12:37 PM - the eternal subject of props (William Daniell)
     9. 01:20 PM - Re: Prop Tach Sender (rampil)
    10. 02:49 PM - Re: Re: Prop Tach Sender (Simon Smith)
    11. 04:15 PM - Rotax 912 run on (David Joyce)
 
 
 


Message 1


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    Time: 12:03:45 AM PST US
    From: Matt Dralle <dralle@matronics.com>
    Subject: Matronics List Fund Raiser - 2007 List of Contributors
    Dear Listers, I would like to thank everyone that made a Contribution in support of the Lists this year! It was really nice to hear all great comments people had regarding the Lists! As I have said many times before, running these Lists is a labor of love. Your generosity during the List Fund Raiser underscores the great sentiments people have made regarding the Lists. If you haven't yet made a Contribution in support of this year's Fund Raiser please feel free to do so. The great List Fund Raiser gifts will be available on the Contribution site for just a little while longer, so hurry and make your Contribution and get your great gift! Once again, the URL for the Contribution web site is: http://www.matronics.com/contribution I would like to thank Andy Gold of the Builder's Bookstore ( http://www.buildersbooks.com ), Jon Croke of Homebuilt HELP ( http://www.homebuilthelp.com ) and Bob Nuckolls of AeroElectric ( http://www.aeroelectric.com ) for their extremely generous support during this year's Fund Raiser through the contribution of discounted merchandise. These are great guys that support the aviation industry and I encourage each and every Lister to have a look at their products. Thank you Andy, Jon and Bob!! Your support is very much appreciated! And finally, below you will find a web link to the 2007 List of Contributors current as of 12/6/07! Have a look at this list of names as these are the people that make all of these List services possible! I can't thank each of you enough for your support and great feedback during this year's Fund Raiser! THANK YOU! http://www.matronics.com/loc/2007.html I will be shipping out all of the gifts in the next few weeks and hope to have everything out by the end of the month. In most cases, gifts will be shipped via US Postal Service. Once again, thank you for making this year's List Fund Raiser successful! Best regards, Matt Dralle Matronics Email List Administrator


    Message 2


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    Time: 09:32:27 AM PST US
    Subject: Prop Tach Sender
    From: "rampil" <ira.rampil@gmail.com>
    Greetings All, A tech tidbit for the group. I have been investigating why my prop tach sensor doesn't work and finally discovered the solution, which I put forth for other who may wind up in this boat. I have an AirMaster prop and a Blue Mountain EFIS. So far there is no way for the BMA to read the engine RPM signal (although that may change soon). The AirMaster hub has a magnet embedded in it's contact plate for its own internal RPM sensing. Since I could not expose the electric RPM signal, I put my own Hall effect sensor on a bracket mounted to the Rotax gear box of my 912uls. The sensor I used is a Westach 720-12R. This sensor never produced a pulse train signal for the Blue Mountain to analyze. I finally put a scope on the probe and discovered that indeed not pulses were generated by a spinning prop. (I really did not want my scope that close to the spinning prop ;-) ) It turns out that the Hall Effect sensor uses a neat integrated sensor chip which it turns out is sensitive only to a SINGLE magnetic polarity. By random chance, AirMaster uses the wrong one. (North vs South, etc). The Westach pulses just fine when I swish a different magnet past it. It turns out that Westach can build the probe with sensitivity to the opposite magnet face. The part number is you need this new probe is 720-12RAM. Same price as the original 720-12R probe. Hope this solves someone else's mystery too! Ira N224XS -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=150815#150815


    Message 3


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    Time: 10:44:15 AM PST US
    Subject: Re: Prop Tach Sender
    From: "Mark Burton" <markb@ordern.com>
    Hi Ira, Don't you still need a tacho of some kind showing engine RPM (rather than prop RPM)? Cheers, Mark Read this topic online here: http://forums.matronics.com/viewtopic.php?p=150826#150826


    Message 4


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    Time: 11:12:30 AM PST US
    Subject: Re: Prop Tach Sender
    From: "Terry Seaver (terrys)" <terrys@cisco.com>
    Hi Mark, The Katana airplanes and motor gliders which use the 912 or 914 have a tach which shows prop speed, not engine speed. It provides numbers more familiar to pilots of other planes powered by direct drive engines. When I checked out in the 912 powered DA-20 I found the prop-speed tach readings were easily understood because they were similar to the tach numbers of the Lycoming and Continental powered planes I had flown before. When we started flying our Europa with an engine-speed tach it took longer to get accustomed to the numbers seen, and what they meant. Regards, Terry Seaver A135 / N135TD -----Original Message----- From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Mark Burton Sent: Thursday, December 06, 2007 10:41 AM Subject: Europa-List: Re: Prop Tach Sender Hi Ira, Don't you still need a tacho of some kind showing engine RPM (rather than prop RPM)? Cheers, Mark


    Message 5


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    Time: 11:25:37 AM PST US
    Subject: Re: Prop Tach Sender
    From: "Mark Burton" <markb@ordern.com>
    Hi Terry, I suspect that in the UK we must have a tacho showing engine RPM. Can anyone confirm whether the PFA require that or not? Cheers, Mark Read this topic online here: http://forums.matronics.com/viewtopic.php?p=150833#150833


    Message 6


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    Time: 11:52:26 AM PST US
    Subject: Re: Prop Tach Sender
    From: "rampil" <ira.rampil@gmail.com>
    Hi All, As it turns out I have the new UMA Rotax-specific tach which shows engine revs. I just wanted to RPM recorded on the EFIS for flight testing since I am a quant. Honestly though, I can imagine why the PFA would insist on engine speed. The ratio is fixed at 2.43! Redline 5750(engine) = 2366(prop) Max Cont 5500 = 2264 prop Cruise 5000 = 2060 prop The redlines don't move, who care what the underlying number is. Actually, if PFA insists, I'd like to hear their reasoning -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=150839#150839


    Message 7


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    Time: 11:55:47 AM PST US
    From: Paul Stewart <europa@pstewart.f2s.com>
    Subject: Re: Prop Tach Sender
    Ira It certainly solves a problem for us as we approach running the engine for the first time with our BMA E1. We have a 720-12R but haven't fitted it yet. Very interested in how you have it configured - channel etc. Where exactly across the radius of the contact plate is the embedded magnet - if you had a photo of your set up? Did you get your probe from Westach direct or via ACS? Regards Paul G-GIDY (running out of jobs to do!!!!!) On 6 Dec 2007, at 17:29, rampil wrote: > > Greetings All, > > A tech tidbit for the group. > > I have been investigating why my prop tach sensor doesn't work and > finally discovered the solution, which I put forth for other who may > wind up in this boat. > > I have an AirMaster prop and a Blue Mountain EFIS. So far there is no > way for the BMA to read the engine RPM signal (although that may > change soon). The AirMaster hub has a magnet embedded in it's contact > plate for its own internal RPM sensing. Since I could not expose the > electric RPM signal, I put my own Hall effect sensor on a bracket > mounted > to the Rotax gear box of my 912uls. The sensor I used is a Westach > 720-12R. > > This sensor never produced a pulse train signal for the Blue Mountain > to analyze. > > I finally put a scope on the probe and discovered that indeed not > pulses > were generated by a spinning prop. (I really did not want my scope > that close to the spinning prop ;-) ) > > It turns out that the Hall Effect sensor uses a neat integrated sensor > chip which it turns out is sensitive only to a SINGLE magnetic > polarity. > By random chance, AirMaster uses the wrong one. (North vs South, etc). > The Westach pulses just fine when I swish a different magnet past it. > > It turns out that Westach can build the probe with sensitivity to the > opposite magnet face. The part number is you need this new probe > is 720-12RAM. Same price as the original 720-12R probe. > > Hope this solves someone else's mystery too! > > Ira N224XS > > -------- > Ira N224XS > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=150815#150815 > >


    Message 8


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    Time: 12:37:19 PM PST US
    From: "William Daniell" <wdaniell@etb.net.co>
    Subject: the eternal subject of props
    Is anyone using IVOPROP? Will 19:31


    Message 9


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    Time: 01:20:29 PM PST US
    Subject: Re: Prop Tach Sender
    From: "rampil" <ira.rampil@gmail.com>
    Hi Paul, Here are pix of my original bracket holding a 720-4 sensor which did not work either (longer story). The new bracket has an L on top to position the 720-12 in apposition to the magnetic slug which you will find just outside the outermost conductor ring. On my prop the magnet is buried in light-colored epoxy. If needed, I can photo the new set-up when next at the hangar. I purchased the new sender directly from Westach, the original from ACS -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=150854#150854 Attachments: http://forums.matronics.com//files/dscn0594sm_159.jpg http://forums.matronics.com//files/dscn0587sm_958.jpg


    Message 10


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    Time: 02:49:12 PM PST US
    From: "Simon Smith" <jodel@nildram.co.uk>
    Subject: Re: Prop Tach Sender
    There is a C of A Tecnam that live at Perth (EGPT) that has a Gauge that shows Prop RPM not engine. Simon -----Original Message----- From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Mark Burton Sent: 06 December 2007 19:24 Subject: Europa-List: Re: Prop Tach Sender Hi Terry, I suspect that in the UK we must have a tacho showing engine RPM. Can anyone confirm whether the PFA require that or not? Cheers, Mark Read this topic online here: http://forums.matronics.com/viewtopic.php?p=150833#150833


    Message 11


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    Time: 04:15:11 PM PST US
    From: "David Joyce" <stranfaer@btinternet.com>
    Subject: Rotax 912 run on
    Thanks for all the replys, I will check the results and report back to the list.... rgds David J Joyce G-BWON




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