AeroElectric-List Digest Archive

Fri 10/22/04


Total Messages Posted: 14



Today's Message Index:
----------------------
 
     1. 07:38 AM - Re: Rumination: Automatic standby fuel pump? (Gary Casey)
     2. 08:44 AM - Re: Transponder Antenna 0.00 FORGED_RCVD_HELO Received: contains a forged HELO (cgalley)
     3. 09:33 AM - Re: Re: Rumination: Automatic standby fuel pump? (Brian Lloyd)
     4. 10:41 AM - Re: Re: Rumination: Automatic standby fuel pump? (echristley@nc.rr.com)
     5. 11:17 AM - Re: Re: Rumination: Automatic standby fuel pump? (Brian Lloyd)
     6. 01:33 PM - Re: Re: Rumination: Automatic standby fuel pump? (Ken)
     7. 02:59 PM - electronic ignition (Gilles St-Pierre)
     8. 04:20 PM - Re: electronic ignition (Jim Stone)
     9. 04:34 PM - Re: electronic ignition (AI Nut)
    10. 06:40 PM - Re: Re: Rumination: Automatic standby fuel pump? (Dj Merrill)
    11. 08:00 PM - Re: Re: Rumination: Automatic standby fuel pump? (Ernest Christley)
    12. 08:24 PM - Crimpers (Guy Buchanan)
    13. 08:46 PM - Re: Crimpers (Eric Ruttan)
    14. 09:41 PM - Re: Re: Rumination: Automatic standby fuel pump? (Brian Lloyd)
 
 
 


Message 1


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    Time: 07:38:41 AM PST US
    From: "Gary Casey" <glcasey@adelphia.net>
    Subject: Re: Rumination: Automatic standby fuel pump?
    --> AeroElectric-List message posted by: "Gary Casey" <glcasey@adelphia.net> <<During landing one would use the mnemonic "GUMPS". The first letter stands for "Gas" which means both fuel selector and fuel pump. Pilots have been managing this for many years. Brian Lloyd>> I agree, and I think the record shows that most of the pilots do it right most of the time. Is that good enough? Also, I've talked to some that say, "it might be necessary for them, but I do it right ALL the time." Is that realistic? There is certainly a balance between complexity and dependency on the human element. I'm all for simplicity, but I think in this case the mechanical complexity might be justified by the improved safety - and the reduced complexity of operation. Another way to look at it: How often does one NEED to remember the "G" in GUMPS? Almost never. Then why add to the complexity of operation every time when it is "almost never" required? Might as well relegate that task to something automatic and use brain cells for something else. Just my opinion. Gary Casey


    Message 2


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    Time: 08:44:52 AM PST US
    From: "cgalley" <cgalley@qcbc.org>
    Subject: Re: Transponder Antenna 0.00 FORGED_RCVD_HELO
    Received: contains a forged HELO --> AeroElectric-List message posted by: "cgalley" <cgalley@qcbc.org> Your fears are unfounded. It only transmits brief blips not continuously. If it was continous, you would have a microwave oven but it doesn't plus the transmission is not concentrated like in the oven! Cy Galley EAA Safety Programs Editor Always looking for ideas and articles for EAA Sport Pilot ----- Original Message ----- From: "Guy Buchanan" <bnn@nethere.com> Subject: AeroElectric-List: Transponder Antenna 0.00 FORGED_RCVD_HELO > --> AeroElectric-List message posted by: Guy Buchanan <bnn@nethere.com> > > Hi all, > I've a Kitfox I'm installing a transponder on. Right now it's a > Becker 4401 / Ack A-30 combo to be installed in the dash. I purchased the > Advanced Aircraft L2 antenna, but now I'm thinking that was a bad idea. The > transponder instructions say to keep the antenna 15' from people as the > transponder is a "high power transmitter". The transponder says don't make > the antenna cable more than 5m long. The antenna documentation says mount > it vertically in the tail, away from any blockages. Well, I've got a > stainless firewall and a carbon seat pan so if I mount it internally in the > tail I'll not only get the full effect of the blast, but the seat and > firewall will presumably block transmission forward. Would I be better off > with the cheap whip sticking out the bottom of the aircraft below my seat? > That way I don't get blasted, there's no blockage, and the cable is much > shorter. Will the shorter cable offset the poorer antenna performance? (I > guess another question is: Is the whip performance less than the dipole?) > Finally, what's the lightest way to do the ground plane. I assume I will > need one since I'm tube and fabric. > > Thanks, > > > Guy Buchanan > K-IV 1200 / 582 / 99% done, thanks to Bob Ducar. > >


    Message 3


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    Time: 09:33:07 AM PST US
    From: Brian Lloyd <brianl@lloyd.com>
    Subject: Re: Rumination: Automatic standby fuel pump?
    --> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com> On Oct 22, 2004, at 10:30 AM, Gary Casey wrote: > I agree, and I think the record shows that most of the pilots do it > right > most of the time. Is that good enough? Also, I've talked to some > that say, > "it might be necessary for them, but I do it right ALL the time." That doesn't happen. People don't do it right all the time. That is why we have mnemonics and checklists and encourage their use. > Is that > realistic? There is certainly a balance between complexity and > dependency > on the human element. I'm all for simplicity, but I think in this > case the > mechanical complexity might be justified by the improved safety - and > the > reduced complexity of operation. You are trading off between remembering and the possibility of system failure. If you land sometime and forget to turn on the fuel pump, you are likely to land safely. Likewise for take-off but there it is more dangerous. Still, if you forget the fuel pump you are still probably going to complete your flight just fine. So now there is the question of failure modes and probability of failure given the increased complexity. And then there are the human factors of changing airplanes and not being in the habit of doing your GUMPS check on downwind. Few airplanes you fly will have automatic fuel pumps. > Another way to look at it: How often does > one NEED to remember the "G" in GUMPS? Almost never. Huh? That is the most important one: gas. G-as (fuel selectors and fuel pumps) U-ndercarriage (down and verify three greens) M-ixture (set for an aborted landing, usually full-rich) P-rop (full RPM) S-lats and flaps (set as appropriate for the type of landing; may substitute 'F') BTW, this is an after-the-fact *check* list, not a list to go through to complete the actions unless you want to do it twice. > Then why add to the > complexity of operation every time when it is "almost never" required? > Might as well relegate that task to something automatic and use brain > cells > for something else. It is a good idea to try to accommodate the limitations of the human brain where possible. It is something else to create a crutch that can lead to a reduction in situational awareness and to introduce more points of failure in the system. > Just my opinion. Mine too. But as a CFI I have to try to help my students be as self-sufficient as possible. I cannot in good conscience teach them to rely on the hardware any more than necessary. Hardware breaks or has limitations and they should be able to complete their flights safely regardless. Brian Lloyd 6501 Red Hook Plaza brianl@lloyd.com Suite 201 +1.340.998.9447 St. Thomas, VI 00802 There is a time to laud one's country and a time to protest. A good citizen is prepared to do either as the need arises.


    Message 4


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    Time: 10:41:10 AM PST US
    From: echristley@nc.rr.com
    Subject: Re: Rumination: Automatic standby fuel pump?
    --> AeroElectric-List message posted by: echristley@nc.rr.com ----- Original Message ----- From: Brian Lloyd <brianl@lloyd.com> Subject: Re: AeroElectric-List: Re: Rumination: Automatic standby fuel pump? > So now there is the question of failure modes and probability of > failure given the increased complexity. And then there are the > human > factors of changing airplanes and not being in the habit of doing > your > GUMPS check on downwind. Few airplanes you fly will have automatic > fuel pumps. > How about installing the automatic switchover system, then act like it isn't there? That is, the switch is Off-Auto-On. Operate as if Auto doesn't exist, and go through GUMPS as always. Always switch to On for T/O and landings. Now the one time that you do forget, you might get a second chance...maybe. My reservation (if the system is used in the above manner) is how can you test it regularly to see if it is working? Is there an easy way to temporarily disable a mechanical fuel pump? If you haven't tested the system recently, its presence shouldn't offer any security.


    Message 5


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    Time: 11:17:49 AM PST US
    From: Brian Lloyd <brianl@lloyd.com>
    Subject: Re: Rumination: Automatic standby fuel pump?
    --> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com> On Oct 22, 2004, at 1:40 PM, echristley@nc.rr.com wrote: > How about installing the automatic switchover > system, then act like it isn't there? That makes a great deal of sense. > That is, the > switch is Off-Auto-On. Operate as if Auto doesn't > exist, and go through GUMPS as always. Always > switch to On for T/O and landings. Now the one time > that you do forget, you might get a second > chance...maybe. Fortuntately we usually don't get burned when we forget this ... usually. > My reservation (if the system is used in the above > manner) is how can you test it regularly to see if > it is working? Is there an easy way to temporarily > disable a mechanical fuel pump? No. > If you haven't > tested the system recently, its presence shouldn't > offer any security. If you run your two pumps in series, i.e. the output of the boost pump feeds the input to the mechanical pump you can look for a pressure rise at the input to the mechanical pump to determine if the boost pump is running. If you run your two pumps in parallel with check valves on their outputs you can measure pressure at the outlet of each pump separately. Brian Lloyd 6501 Red Hook Plaza brianl@lloyd.com Suite 201 +1.340.998.9447 St. Thomas, VI 00802 There is a time to laud one's country and a time to protest. A good citizen is prepared to do either as the need arises.


    Message 6


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    Time: 01:33:23 PM PST US
    From: Ken <klehman@albedo.net>
    Subject: Re: Rumination: Automatic standby fuel pump?
    clamav-milter version 0.80c on juliet.albedo.net --> AeroElectric-List message posted by: Ken <klehman@albedo.net> I believe there were indeed fuel compatability problems with the fuel pressure switch that one company was supplying for this purpose on efi systems awhile ago. Automatic activation is a wonderful band-aid for systems that can't tolerate two pumps on simultaneously, but I'm also not convinced it is appropriate technology to retrofit to an auxilary boost pump, at least not for all cases. It won't help if you are sucking air because the tank is dry. Some aircraft initially suffer only a partial power loss when a tank goes dry with the boost pump off which warns you to check the fuel feed selector, whereas with the boost pump already on there is a complete sudden total power loss when the tank goes dry. Depends on the aircraft and fuel system. For some a reasonable solution might well be to design so that both pumps can run all the time like the heavy metal does. Ken Brian Lloyd wrote: >--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com> > >On Oct 22, 2004, at 10:30 AM, Gary Casey wrote: > > > >>I agree, and I think the record shows that most of the pilots do it >>right >>most of the time. Is that good enough? Also, I've talked to some >>that say, >>"it might be necessary for them, but I do it right ALL the time." >> >> > >That doesn't happen. People don't do it right all the time. That is >why we have mnemonics and checklists and encourage their use. > > > >>Is that >>realistic? There is certainly a balance between complexity and >>dependency >>on the human element. I'm all for simplicity, but I think in this >>case the >>mechanical complexity might be justified by the improved safety - and >>the >>reduced complexity of operation. >> >> > >You are trading off between remembering and the possibility of system >failure. If you land sometime and forget to turn on the fuel pump, you >are likely to land safely. Likewise for take-off but there it is more >dangerous. Still, if you forget the fuel pump you are still probably >going to complete your flight just fine. > >So now there is the question of failure modes and probability of >failure given the increased complexity. And then there are the human >factors of changing airplanes and not being in the habit of doing your >GUMPS check on downwind. Few airplanes you fly will have automatic >fuel pumps. > > > >>Another way to look at it: How often does >>one NEED to remember the "G" in GUMPS? Almost never. >> >> > >Huh? That is the most important one: gas. > >G-as (fuel selectors and fuel pumps) >U-ndercarriage (down and verify three greens) >M-ixture (set for an aborted landing, usually full-rich) >P-rop (full RPM) >S-lats and flaps (set as appropriate for the type of landing; may >substitute 'F') > >BTW, this is an after-the-fact *check* list, not a list to go through >to complete the actions unless you want to do it twice. > > > >>Then why add to the >>complexity of operation every time when it is "almost never" required? >>Might as well relegate that task to something automatic and use brain >>cells >>for something else. >> >> > >It is a good idea to try to accommodate the limitations of the human >brain where possible. It is something else to create a crutch that can >lead to a reduction in situational awareness and to introduce more >points of failure in the system. > > > >>Just my opinion. >> >> > >Mine too. But as a CFI I have to try to help my students be as >self-sufficient as possible. I cannot in good conscience teach them to >rely on the hardware any more than necessary. Hardware breaks or has >limitations and they should be able to complete their flights safely >regardless. > >Brian Lloyd 6501 Red Hook Plaza >brianl@lloyd.com Suite 201 >+1.340.998.9447 St. Thomas, VI 00802 > >


    Message 7


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    Time: 02:59:41 PM PST US
    From: "Gilles St-Pierre" <ranchlaseigneurie@hotmail.com>
    Subject: electronic ignition
    --> AeroElectric-List message posted by: "Gilles St-Pierre" <ranchlaseigneurie@hotmail.com> Hello I will be using an 8 cyl. (5.1 lt) Jabiru engine in my Murphy Elite. I am wondering if there are any lightweight electronic modules for an 8 cyl engines Would appreciate if someone could give me the info. sincerely dr gilles st pierre bsl aviation


    Message 8


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    Time: 04:20:04 PM PST US
    From: "Jim Stone" <jsto1@tampabay.rr.com>
    Subject: electronic ignition
    --> AeroElectric-List message posted by: "Jim Stone" <jsto1@tampabay.rr.com> Gilles, The Jabiru engines come with solid state electronic mags, are you wanting to replace them with something different? If you are looking for an electronic engine monitor system for EGT, CHT, fuel, etc. I suggest you check out the following URL, Craig has Chevy V8 in his RV so I know he can do 8 cyl. http://www.pcflightsystems.com/ I'm using his system with my Jabiru 3300. Another one I have seen advertising 8 cyl is Stern, but they look more expensive. http://www.sterntech.com/pulsar200.php The Grand Rapids Technologies EIS doesn't do a complete set of sensors for an 8 cyl, but they have a good reputation, so you might want to talk to them. -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Gilles St-Pierre Subject: AeroElectric-List: electronic ignition --> AeroElectric-List message posted by: "Gilles St-Pierre" --> <ranchlaseigneurie@hotmail.com> Hello I will be using an 8 cyl. (5.1 lt) Jabiru engine in my Murphy Elite. I am wondering if there are any lightweight electronic modules for an 8 cyl engines Would appreciate if someone could give me the info. sincerely dr gilles st pierre bsl aviation == == == ==


    Message 9


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    Time: 04:34:53 PM PST US
    From: "AI Nut" <ainut@hiwaay.net>
    Subject: Re: electronic ignition
    --> AeroElectric-List message posted by: "AI Nut" <ainut@hiwaay.net> If you're into building/installing your own, we have done this to a 4-banger Ford engine. 4 each CHT and EGT, as well as turbine temps and pressures, intake pressure, and etc. Cheaply, too 8-). CHT and EGT sensors came from Aircraft Spruce. Temp sensors are from an electronics supply house. Chips for conversion to 0-5VDC from Digikey. Circuits are boilerplate from Analog Devices. Less than $200 so far. $110 for 8 channel A/D converter with USB output from http://www.labjack.com/. Computer power is as your discretion. Software is easy, too. Let me know if you want more details. Of course, only for experimentals 8-). But if you want to put them in a certificated plane, I won't tell if you won't. HTH, AI Nut ----- Original Message ----- From: "Jim Stone" <jsto1@tampabay.rr.com> Subject: RE: AeroElectric-List: electronic ignition > --> AeroElectric-List message posted by: "Jim Stone" <jsto1@tampabay.rr.com> > > Gilles, > > The Jabiru engines come with solid state electronic mags, are you > wanting to replace them with something different? > > If you are looking for an electronic engine monitor system for EGT, CHT, > fuel, etc. I suggest you check out the following URL, Craig has Chevy > V8 in his RV so I know he can do 8 cyl. > > http://www.pcflightsystems.com/ > > I'm using his system with my Jabiru 3300. > > Another one I have seen advertising 8 cyl is Stern, but they look more > expensive. > > http://www.sterntech.com/pulsar200.php > > The Grand Rapids Technologies EIS doesn't do a complete set of sensors > for an 8 cyl, but they have a good reputation, so you might want to talk > to them. > > <<<snip>>>


    Message 10


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    Time: 06:40:38 PM PST US
    From: Dj Merrill <deej@thayer.dartmouth.edu>
    Subject: Re: Rumination: Automatic standby fuel pump?
    --> AeroElectric-List message posted by: Dj Merrill <deej@thayer.dartmouth.edu> Gary Casey wrote: > Might as well relegate that task to something automatic and use brain cells > for something else. Like lowering the landing gear? *wink* -Dj


    Message 11


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    Time: 08:00:30 PM PST US
    From: Ernest Christley <echristley@nc.rr.com>
    Subject: Re: Rumination: Automatic standby fuel pump?
    --> AeroElectric-List message posted by: Ernest Christley <echristley@nc.rr.com> Brian Lloyd wrote: > --> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com> > > On Oct 22, 2004, at 1:40 PM, echristley@nc.rr.com wrote: >>If you haven't >>tested the system recently, its presence shouldn't >>offer any security. > > > If you run your two pumps in series, i.e. the output of the boost pump > feeds the input to the mechanical pump you can look for a pressure rise > at the input to the mechanical pump to determine if the boost pump is > running. > > If you run your two pumps in parallel with check valves on their > outputs you can measure pressure at the outlet of each pump separately. > Ooops! Slight misunderstanding, Brian. Testing that the fuel pump works just like you say. It's the automatic kick-in that is the unknown. I wouldn't trust any system to work unless it is operated regularly, and the automatic kick-in is another system in and of itself. Heh, maybe you switch to Auto before cranking the engine and take note of fuel pressure? -- http://www.ernest.isa-geek.org/ "This is by far the hardest lesson about freedom. It goes against instinct, and morality, to just sit back and watch people make mistakes. We want to help them, which means control them and their decisions, but in doing so we actually hurt them (and ourselves)."


    Message 12


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    Time: 08:24:55 PM PST US
    From: Guy Buchanan <bnn@nethere.com>
    Subject: Crimpers
    0.00 FORGED_RCVD_HELO Received: contains a forged HELO --> AeroElectric-List message posted by: Guy Buchanan <bnn@nethere.com> I finally have some good information. I bought the AMP PRO-CRIMPER II (58433-3) from Digi-Key for $66. I just couldn't part with the $350+ to get the real thing. (59824-1 TETRA-CRIMP.) Remember the AMP catalog says that the PRO-CRIMPER II is not UL or CSA listed for PIDG FASTONs. I bought some of every size of PIDG FASTONs, rings, and splices because I'd need them and to do some testing. I received the PRO-CRIMPER and the instructions said it's not UL or CSA listed for ANYTHING!. I call AMP and finally get someone who seems to know what they're talking about. He says UL won't approve anything with replaceable dies. They will only approve single use tools that won't fall out of adjustment. The PRO-CRIMPER II will crimp just about anything with the right dies and is adjustable. That means you have to make sure it's in spec when you use it. Therefore UL won't approve it. I asked the AMP rep why the PRO-CRIMPER existed. He said it was designed for field use. Don't ask me why field use doesn't require UL listed tools, but I suspect nobody wanted to carry around the approximately 50 separate tools I counted in the CERTI-CRIMP brochure. My observations on the PRO-CRIMPER crimps was that they looked just like Bob's pictures of his expensive tool crimps. I haven't cut any up but I pulled them and they were tight. I did note, however, that the PIDG splice was substantially different in geometry than the ring and FASTON. The splice accommodated much larger insulation than the others. The probable conclusion is that I bought the wrong splices. (I have yet to double check. It's a low priority item.) I'm reasonably happy with my PRO-CRIMPER, though I still feel like a liability target. I'll just keep the PRO-CRIMPER in spec by mic'ing my crimps and recording the results. (The PRO-CRIMPER instructions give "CRIMP HEIGHTS" based on "LEAD ROD" crimps for your enjoyment. Don't ask me where I'm going to find lead rod.) Guy Buchanan K-IV 1200 / 582 / 99% done, thanks to Bob Ducar.


    Message 13


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    Time: 08:46:11 PM PST US
    From: "Eric Ruttan" <ericruttan@chartermi.net>
    Subject: Re: Crimpers
    --> AeroElectric-List message posted by: "Eric Ruttan" <ericruttan@chartermi.net> > I finally have some good information. > crimps and recording the results. (The PRO-CRIMPER instructions give "CRIMP > HEIGHTS" based on "LEAD ROD" crimps for your enjoyment. Don't ask me where > I'm going to find lead rod.) Just get a few rods and line them up. The one in front is the lead rod. DO NOT ARCHIVE. Please. I mean it. Really.


    Message 14


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    Time: 09:41:16 PM PST US
    From: Brian Lloyd <brianl@lloyd.com>
    Subject: Re: Rumination: Automatic standby fuel pump?
    --> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com> On Oct 22, 2004, at 10:30 PM, Ernest Christley wrote: > Slight misunderstanding, Brian. Testing that the fuel pump works just > like you say. It's the automatic kick-in that is the unknown. I > wouldn't trust any system to work unless it is operated regularly, and > the automatic kick-in is another system in and of itself. > > Heh, maybe you switch to Auto before cranking the engine and take note > of fuel pressure? That works. That is what I do in both of my airplanes right now. Boost pump goes on before the engine is started to ensure there is fuel there to start the engine. This does tell you that the pumps are working. > > -- > http://www.ernest.isa-geek.org/ > "This is by far the hardest lesson about freedom. It goes against > instinct, and morality, to just sit back and watch people make > mistakes. We want to help them, which means control them and their > decisions, but in doing so we actually hurt them (and ourselves)." How about this from R.A. Heinlein: "Political tags - such as royalist, communist, democrat, populist, fascist, liberal, conservative, and so forth - are never basic criteria. The human race divides politically into those who want people to be controlled and those who have no such desire. The former are idealists acting from highest motives for the greatest good of the greatest number. The latter are surly curmudgeons, suspicious and lacking in altruism. But they are more comfortable neighbors than the other sort." Brian Lloyd 6501 Red Hook Plaza brianl@lloyd.com Suite 201 +1.340.998.9447 St. Thomas, VI 00802 There is a time to laud one's country and a time to protest. A good citizen is prepared to do either as the need arises.




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