Today's Message Index:
----------------------
1. 01:45 AM - Routing cables around back of panel (Neville Kilford)
2. 04:01 AM - Re: Re: EI Install - Firewall Penetration (Dan Checkoway)
3. 05:41 AM - Re: Re: EI Install - Firewall Penetration (John Schroeder)
4. 06:15 AM - Re: Re: EI Install - Firewall Penetration (Robert L. Nuckolls, III)
5. 06:58 AM - Re: Builder documentation on the Web-summary (Robert L. Nuckolls, III)
6. 07:03 AM - Wind driven generator for Corben Jr. ACE (Robert L. Nuckolls, III)
7. 07:36 AM - Infinity stick grip wiring (Greg's Mail)
8. 08:48 AM - Capacitor on output of PM alternator? (Robert L. Nuckolls, III)
9. 08:48 AM - Re: Infinity stick grip wiring (Robert L. Nuckolls, III)
10. 09:00 AM - Re: Re: EI Install - Firewall Penetration (Robert L. Nuckolls, III)
11. 09:54 AM - Re: Re: EI Install - Firewall Penetration (Dan Checkoway)
12. 10:03 AM - Re: Infinity stick grip wiring (John Schroeder)
13. 10:09 AM - Essential Bus Diode Wiring (mailbox bob at mail.flyboybob.com)
14. 10:43 AM - Re: Re: EI Install - Firewall Penetration (Robert L. Nuckolls, III)
15. 10:49 AM - Re: Wind driven generator for Corben Jr. ACE (Werner Schneider)
16. 12:04 PM - Re: Re: EI Install - Firewall Penetration (Matt Prather)
17. 01:11 PM - Re: power supply (Ken Harrill)
18. 02:08 PM - Re: electronic MAP control (rwilliams)
19. 03:21 PM - Re: Essential Bus Diode Wiring (Robert L. Nuckolls, III)
20. 03:22 PM - Re: power supply (Robert L. Nuckolls, III)
21. 04:13 PM - Gas Turbines (Eric M. Jones)
22. 09:41 PM - Re: power supply (Dave von Linsowe)
Message 1
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| Subject: | Routing cables around back of panel |
--> AeroElectric-List message posted by: "Neville Kilford" <nkilford@etravel.org>
Hi guys,
Does anyone have any suggestions for routing bundles of cables and tubes
around the back of the instrument panel? I'm using cable ties and screw-down
bases for routing around the inside of the firewall, where the fuseholders
are, but I'm trying to avoid screws going through the panel.
I can weld some lugs on the blind side of the panel to support cables, but
I'd be interested to know if there's a handy way of doing it.
While I'm on the subject, what about the routing of cables from behind
instruments, radios, etc. It's only a foot or so, but what's a good way to
secure cables from the back of a radio, say, down to the panel? It seems as
though I should add some structure to support all the back-of-panel wiring
and tubing.
Thanks!
Nev
--
Jodel D150 in progress
UK
Message 2
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| Subject: | Re: EI Install - Firewall Penetration |
--> AeroElectric-List message posted by: "Dan Checkoway" <dan@rvproject.com>
My feeling is "wassabigdeal?!" I'm not ABOUT to cut a 1" hole in my
firewall when I could get away with a much smaller pass-through just for the
wire. I'll be chopping my connector off.
http://rvproject.com/images/2003/20030713_lightspeed_harness.jpg
That's a photo of what the 15-pin connector looks like when you take the
housing off, as it comes from LightSpeed. I don't understand why you
wouldn't just order a new crimp pin connector from Mouser (or the like) for
*less than a buck*, cut the wires off one by one and crimp on D-subs and
insert 'em into the new connector. Don't even need to label if you do it
one wire at a time. But I plan on cutting the existing connector off,
running the wire through a small pass-through (along with the bundle of
engine transducer/sensor wires, but not with the coil wires), and then
crimping on the new connector once the wire passes aft of the firewall.
http://rvproject.com/images/2003/20030713_lightspeed_schematic.jpg
That's a crappy photo of the schematic that comes with the LightSpeed
system...but you've got a reference if you get stuck. I understand why
Klaus doesn't want to support myriad problems when people cut off his
connector and screw up installing a new one, but I also don't think it's
that complicated that we should consider gouging our firewalls
unnecessarily.
Hopefully sometime in the next few weeks I'll wrap up the firewall forward
wiring on my RV-7, so I'll have pics on the site for reference.
By the way, the 15-pin connector housings are available from Mouser...part #
156-1415 (receptacle) or 156-1416 (plug), and the crimp pin/socket contacts
are on page 603 of the online catalog as well.
http://www.mouser.com/catalog/614/603.pdf
)_( Dan
RV-7 N714D
http://www.rvproject.com
----- Original Message -----
From: "Tinne maha" <tinnemaha@hotmail.com>
Subject: Re: AeroElectric-List: Re: EI Install - Firewall Penetration
> --> AeroElectric-List message posted by: "Tinne maha"
<tinnemaha@hotmail.com>
>
>
> Yes, Bob. Your presumption is correct. LSE supplies a pre-wired harness
with a15 pin connector on one end the direct crank sensor cirquit board on
the other. The 15 pin connector hooks up to the control module which is
recommended to be installed behind the firewall. A minimum of 3 inches away
from these input wires the installer is supposed to route 2 seaparate RG58
coaxial cables thatconnect to the 2ignition coils (assuming a 4 cylinder
engine)
>
>
> LSE cannot recommend cutting re-splicing/soldering the input wires to get
them through the firewall so they recommend drilling a hole just large
enough to get the bare minimum of the 15 pin connector (cover removed)
through the firewall.I could do that just find a mondo grommet that I'd
have tocut a radius in but itkinda bugs me. I think Ilike your d-sub idea
but I don't know much at all about them. Seen the pictures on the tools page
but that's it. I'm pretty sure when I say 15 pin connector it is a d-sub but
I don't know for sure I certainly don't know if they are removable but I
will research that pathas soon as time allows.
>
>
> Unfortunately I'm having to work out of town for a week and wont have
internet access until Saturday the 19th. This is my last post until then but
I look forward to your response.
>
>
> Thanks,
>
>
> Grant
>
>
> From: "Robert L. Nuckolls, III" <BOB.NUCKOLLS@COX.NET>
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Re: EI Install - Firewall Penetration
> Date: Sun, 13 Jul 2003 15:43:21 -0500
>
> -- AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<BOB.NUCKOLLS@COX.NET>
>
> At 03:21 PM 7/13/2003 -0500, you wrote:
> -- AeroElectric-List message posted by: Jeff Point
<JPOINT@MINDSPRING.COM>
>
> I just installed this as well. I decided that it would be less work to
> drill a 1 inch hole in the firewall than to cut/ splice the wiring. A
> good 1 inch hole saw works well for this. I used a stainless firewall
> shield with an asbestos washer to seal the opening. On the plus side,
> you can run lots of other wires through this big hole (but not the LSE
> high voltage wires!
>
>
> Do I presume correctly that there is a manufacturer supplied
> harness with connector installed that needs to go through
> the firewall? I think I would replace the connector with
> one that uses removable pins . . . like a d-sub. Before you
> install pins in new connector, route the harness through
> a smaller hole.
>
> What kind of high voltage wires need to come through the
> firewall?
>
> Bob . . .
>
>
Message 3
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| Subject: | Re: EI Install - Firewall Penetration |
--> AeroElectric-List message posted by: John Schroeder <jschroeder@perigee.net>
Dan -
Can you use the machined pins with these? Looks like they use the cheaper
pins.
John
DO NOT ARCHIVE
> By the way, the 15-pin connector housings are available from
> Mouser...part #
> 156-1415 (receptacle) or 156-1416 (plug), and the crimp pin/socket
> contacts
> are on page 603 of the online catalog as well.
Message 4
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| Subject: | Re: EI Install - Firewall Penetration |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 04:00 AM 7/14/2003 -0700, you wrote:
>--> AeroElectric-List message posted by: "Dan Checkoway" <dan@rvproject.com>
>
>My feeling is "wassabigdeal?!" I'm not ABOUT to cut a 1" hole in my
>firewall when I could get away with a much smaller pass-through just for the
>wire. I'll be chopping my connector off.
>
>http://rvproject.com/images/2003/20030713_lightspeed_harness.jpg
yup . . . good ol' d-sub. cutoff and replacement is a piece
of cake. Go with machined pins, throw away the saddle-clamp
strain-relief and replace with silicon tape wrap sufficient
to provide very snug fit in the exit hole of the backshell
like this:
http://216.55.140.222/Catalog/avionics/760harn.jpg
Crimped on d-subs have to be the easiest connectors in the
world to work with. Wouldn't hesitate for a second to
chop one off and replace it.
Don't even need to label if you do it
>one wire at a time. But I plan on cutting the existing connector off,
>running the wire through a small pass-through (along with the bundle of
>engine transducer/sensor wires, but not with the coil wires), and then
>crimping on the new connector once the wire passes aft of the firewall.
Tell me about the "coil wires" . . . are these the infamous
coax cable leads? Why wouldn't one route these same hole?
Bob . . .
Message 5
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| Subject: | Re: Builder documentation on the Web-summary |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 01:50 PM 7/10/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: John Schroeder
><jschroeder@perigee.net>
>
>Bob -
>
>I tried to import your Z-14FADEC.pdf file into my full up Acrobat v5.0
>program. It is very fuzzy and poor quality compared to your other .pdf
>files. I then saved it and tried to import it into CorelDraw to get it into
>.dxf format. This has worked very well in the past. However, when I pull up
>the .dxf file in AutoCAD 2000LT, the drawing is still fuzzy and full of
>artifacts. All of the lines and most of the text are composed of
>polylines!! This is very strange and definitely not the same quality
>translation of some of your files I've been able to obtain in the past. It
>might be a case of too much line weight control.:-))
>
>Could you post the Z-14FADEC in a dwg format on your website? Much obliged.
Okay.
http://216.55.140.222/Page_Per_System/Power_Distribution/z14_fadec.dwg
Bob . . .
Message 6
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| Subject: | Wind driven generator for Corben Jr. ACE |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 05:47 PM 7/3/2003 +0000, you wrote:
>Below is the result of your inquiry. It was submitted by
>Lewis Hood (lewis.hood@us.army.mil) on Thursday, July 3, 2003 at 10:47:29
>
>Thursday, July 3, 2003
>
>Lewis Hood
>
>,
>Email: lewis.hood@us.army.mil
>Comments/Questions: I have built A non-electric Corben Jr. ACE. I wish to
>use Microair VHF with air driven generator (no vac drive on my eng) any
>suggestions on the generator? am willing to build same.1 amp should be
>adequate. THANKS
I've had in the back of my mind a project to see what can
be done with a bicycle generator fitted with model airplane
propeller driving a high efficiency rectifier/regulator.
There was a similar project written up in Sport Aviation
about 10-15 years ago. Don't recall details now and I'm
curious just how much energy can be extracted from such
a system with careful attention to the physics.
Have you considered an alkaline battery pack of
two 6v lantern batteries. Lots of capacity for size,
excellent shelf life. REALLY easy to put in the
airplane. I'll bet a pair of batteries would carry
your radio for a year's worth of flying.
I will invite you to join us on the AeroElectric List
to continue this and similar discussions. It's useful to
share the information with as many folks as possible.
A further benefit can be realized with membership on
the list. There are lots of technically capable folks
on the list who can offer suggestions too. You can
join at . . .
http://www.matronics.com/subscribe/
Thanks!
Bob . . .
|---------------------------------------------------|
| A lie can travel half way around the world while |
| the truth is till putting on its shoes . . . |
| -Mark Twain- |
|---------------------------------------------------|
Message 7
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| Subject: | Infinity stick grip wiring |
--> AeroElectric-List message posted by: "Greg's Mail" <50coperhed@jbntelco.com>
What would be the best connector to install on the leads coming out
of Infinity stick grip harness , the switches are rated at 8 amps.max.
Would the D sub connectors be heavy enough?
Thanks Greg Davis
Message 8
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| Subject: | Capacitor on output of PM alternator? |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 02:42 PM 7/14/2003 +0000, you wrote:
>Below is the result of your inquiry. It was submitted by
>Derek Ferris (derekferris@cox.net) on Monday, July 14, 2003 at 07:42:06
>
>Monday, July 14, 2003
>
>Derek Ferris
>
>,
>Email: derekferris@cox.net
>Comments/Questions: Bob:
>What is the ideal rating (capacitance & voltage) for the computer-grade
>filter capacitor, used with the Rotax 912 18A alternator?
>I have seen various ratings in drawings - 20,000, 22,000, 47,000, 16V, 25V
>- and so on.
>Mallory who makes these capacitors does not offer all of these ratings.
>Lastly, is the capacitor really necessary or highly advisable?
Any capacitor 20,000 uF or more, 16V or more will be a
great asset to the reduction of rectified AC ripple
that comes from any rectifier/regulator for a PM
alternator. I would go for a 47 KuF and plan to
replace it every three or four years.
>One home-builder told me he saw no difference in his radio noise with or
>without the capacitor.
Then HIS radio noise is coming from another antagonist.
Elimination of the capacitor does not mean you WILL have
noise nor does inclusion of the capacitor mean you WILL
NOT have noise. It's simply one of many things we do
to improve the overall performance of the system.
I will invite you to join us on the AeroElectric List
to continue this and similar discussions. It's useful to
share the information with as many folks as possible.
A further benefit can be realized with membership on
the list. There are lots of technically capable folks
on the list who can offer suggestions too. You can
join at . . .
http://www.matronics.com/subscribe/
Thanks!
Bob . . .
|---------------------------------------------------|
| A lie can travel half way around the world while |
| the truth is till putting on its shoes . . . |
| -Mark Twain- |
|---------------------------------------------------|
Message 9
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| Subject: | Re: Infinity stick grip wiring |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 09:36 AM 7/14/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "Greg's Mail"
><50coperhed@jbntelco.com>
>
>What would be the best connector to install on the leads coming out
>of Infinity stick grip harness , the switches are rated at 8 amps.max.
>Would the D sub connectors be heavy enough?
>Thanks Greg Davis
That's what I would use . . .
Bob . . .
Message 10
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| Subject: | Re: EI Install - Firewall Penetration |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 08:39 AM 7/14/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: John Schroeder
><jschroeder@perigee.net>
>
>Dan -
>
>Can you use the machined pins with these? Looks like they use the cheaper
>pins.
>
>John
>DO NOT ARCHIVE
Machined pins will generally fit into housings supplied
with sheet metal pins. I buy housings at Radio Shack, throw
away the pins, and use machined pins all the time.
Bob . . .
Message 11
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| Subject: | Re: EI Install - Firewall Penetration |
--> AeroElectric-List message posted by: "Dan Checkoway" <dan@rvproject.com>
> Tell me about the "coil wires" . . . are these the infamous
> coax cable leads? Why wouldn't one route these same hole?
Yep, they're the two coax leads going from the brain box to the coils' two
fast-ons each.
From the LSE installation manual online:
"Route the RG58 coax cables to the ignition coils. Avoid their exposure to
heat from cylinder heads or exhaust systems. The primary ignition coil
wires running from the Plasma CD Ignition module to the ignition coils can
be routed together, however they should be kept separate from the ignition
system input wires (harness)."
Plenty of specificity in "kept separate," huh? 8-) I recall somebody else
posting a 3" suggested separation.
In my case, the installation takes care of separation. I have the direct
crank sensor, so my "input wire harness" will run beneath the cylinders,
secured to the case via adel clamps, then up along the engine mount and in
through the sensor wire pass-through.
My coil wires will go pretty much directly from the brain box, which I've
installed centered in front of the pilot about 4" behind the firewall,
straight across the top of the mount and case to the coils (exact coil
location TBD...discussing that on the lycoming/rv-lists as we speak). So
the separation of coil leads and the crank sensor harness is sort of "built
in."
)_( Dan
RV-7 N714D
http://www.rvproject.com
Message 12
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| Subject: | Re: Infinity stick grip wiring |
--> AeroElectric-List message posted by: John Schroeder <jschroeder@perigee.net>
Some folks have used the mini connectors from model airplane shops. As I
recall, they used 22 awg and it worked OK.
John
Message 13
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| Subject: | Essential Bus Diode Wiring |
--> AeroElectric-List message posted by: "mailbox bob at mail.flyboybob.com" <bob@flyboybob.com>
'Lectric Bob,
On page Z-9 of The AeroElectric Connection, Figure Z-11 shows the full wave
bridge rectifier being used to power the essential bus from the main bus.
Why did you not connect the input side to both AC terminals? From the
schematic it appears that this will give you twice the diode capacity.
Wouldn't it be better to use two diodes at half the power each to get the
same DC+ output result?
Regards,
Bob Lee
______________________________
N52BL KR2 Suwanee, GA 30024
91% done only 51% to go!
Phone/Fax: 770/844-7501
mailto:bob@flyboybob.com
http://flyboybob.com
Message 14
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| Subject: | Re: EI Install - Firewall Penetration |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 09:52 AM 7/14/2003 -0700, you wrote:
>--> AeroElectric-List message posted by: "Dan Checkoway" <dan@rvproject.com>
>
> > Tell me about the "coil wires" . . . are these the infamous
> > coax cable leads? Why wouldn't one route these same hole?
>
>Yep, they're the two coax leads going from the brain box to the coils' two
>fast-ons each.
>
> From the LSE installation manual online:
>
>"Route the RG58 coax cables to the ignition coils. Avoid their exposure to
>heat from cylinder heads or exhaust systems. The primary ignition coil
>wires running from the Plasma CD Ignition module to the ignition coils can
>be routed together, however they should be kept separate from the ignition
>system input wires (harness)."
I can deduce no good reason for extra-ordinary separation
efforts. This wire SHOULD be a shielded, twisted pair fabricated
from modern, high temperature insulation. But even with the
low temperature coax, there's no reason in physics to suspect
these wires as possible antagonists. For every electron going
out on center conductor, there is a companion electron coming back
on the shield - net magnetic field is zero. Shielding takes care
of any potential electro-static coupling.
Bob . . .
Message 15
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| Subject: | Re: Wind driven generator for Corben Jr. ACE |
--> AeroElectric-List message posted by: "Werner Schneider" <wernerschneider@compuserve.com>
> >Comments/Questions: I have built A non-electric Corben Jr. ACE. I wish to
> >use Microair VHF with air driven generator (no vac drive on my eng) any
> >suggestions on the generator? am willing to build same.1 amp should be
> >adequate. THANKS
>
> I've had in the back of my mind a project to see what can
> be done with a bicycle generator fitted with model airplane
> propeller driving a high efficiency rectifier/regulator.
>
We are using in our L-4, non electric a small accumulator and a solarpanel
about 10 by 20 inches, works out very well with a small becker radio.
Werner
Message 16
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| Subject: | Re: EI Install - Firewall Penetration |
--> AeroElectric-List message posted by: "Matt Prather" <mprather@spro.net>
A little empiracle data below...
snip
>> cable leads? Why wouldn't one route these same hole?
>>
>>Yep, they're the two coax leads going from the brain box to the coils'
>> two fast-ons each.
>>
>> From the LSE installation manual online:
>>
>>"Route the RG58 coax cables to the ignition coils. Avoid their
>> exposure to heat from cylinder heads or exhaust systems. The primary
>> ignition coil wires running from the Plasma CD Ignition module to the
>> ignition coils can be routed together, however they should be kept
>> separate from the ignition system input wires (harness)."
>
> I can deduce no good reason for extra-ordinary separation
> efforts. This wire SHOULD be a shielded, twisted pair fabricated
> from modern, high temperature insulation. But even with the
> low temperature coax, there's no reason in physics to suspect
> these wires as possible antagonists. For every electron going
> out on center conductor, there is a companion electron coming back
> on the shield - net magnetic field is zero. Shielding takes care of
> any potential electro-static coupling.
>
> Bob . . .
>
>
I actually didn't even use shielded wire for either the wires to
the coil, nor the ones from the crank triggers. I did twist the
pair of wires leading to each device from the brain box (though I
am not positive that is even required/beneficial - think it is for
the sensors, as the input probably has good common mode rejection).
All of the wires are bundled together for about 2 feet from the
engine end of the motor mount, through the firewall to the LSE box.
No evidence of malfunction, misfire, or other noise issues. It
might be fun to scope them sometime, however.
Regards,
Matt Prather
N34RD
Message 17
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--> AeroElectric-List message posted by: Ken Harrill <KHarrill@osa.state.sc.us>
Dave,
I used a LM-317T voltage regulator to provide ship's power to my DRE
headsets. I talked with the DRE tech support and they suggested this
approach. It works very well. I have had no problems with noise or headset
damage.
Ken Harrill
RV-6, 215 hours
-----Original Message-----
From: Dave von Linsowe [mailto:davevon@tir.com]
Subject: Re: AeroElectric-List: power supply
--> AeroElectric-List message posted by: "Dave von Linsowe"
<davevon@tir.com>
Bob,
What are your thoughts on how clean the power source for ANR headsets need
to be? If I build a LM-317 voltage regulator and it's not good enough,
could I damage the ANR circuitry? How will the ANR respond if the input is
not clean enough?
I've got the Headset Inc. ANR setup in a Peltor 7005 and it really works
great! I'm also using their auto shut off battery box, which I'm sure has
saved me a couple of batteries already. The problem is that the battery box
lays on the floor in front of the spar (RV-6) out of sight and out of mind.
The headset plugs are down under the panel (I didn't put them there). I'll
forget to turn it on before I'm strapped in and can't reach the box and/or
forget to turn it off when I hop out. (I know, could be a check list item,
but I think something like this should be transparent)
I'm going to upgrade my copilot's (wife) headset soon and just wanted to get
a handle on this.
Not affiliated with Headsets Inc. in any way, just like the way it works.
Thanks,
Dave
RV-6
The Silver Turtle
----- Original Message -----
From: "Dave von Linsowe" <davevon@tir.com>
Subject: Re: AeroElectric-List: power supply
> --> AeroElectric-List message posted by: "Dave von Linsowe"
<davevon@tir.com>
>
> Thanks John,
>
> I was wondering about the LM-317 being a clean enough power source. My
main
> reason for wanting to go with the aircraft power system is to eliminate
the
> need to turn the ANR on and off separate from everything else.
>
> Dave
>
>
> ----- Original Message -----
> From: <KITFOXZ@aol.com>
> To: <aeroelectric-list@matronics.com>
> Subject: Re: AeroElectric-List: power supply
>
>
> > --> AeroElectric-List message posted by: KITFOXZ@aol.com
> >
> > In a message dated 7/10/2003 10:22:33 AM Eastern Standard Time,
> > davevon@tir.com writes:
> >
> > > Active noise reduction systems require a very stable and clean power
> > > supply. Our panel-mount power supply has 2 voltage regulators, a DC-DC
> converter
> > > for isolation, and an in-line 1/4 amp fuse.
> > >
> > >
> >
> > Dave,
> >
> > The ANR headset manufacturer's statement is true to get the best
> performance
> > possible. A DC-DC converter is considerable more parts count than just
an
> > LM-317 and voltage divider resistors. They are building or selling a
> power
> > supply that truly isolates input and supplied output voltages.
> >
> > If cheap is what you want, see how many 9 V batteries you can buy for
$80.
> > ...A stand alone battery is the best isolation possible...You could
attach
> a
> > small charging circuit to your ship's power cheaply that could keep a
9.6
> V
> > NiCad battery pack alive and switch it out of the circuit manually, etc.
> >
> > John P. Marzluf
> > Columbus, Ohio
> > Kitfox Outback (out back in the garage)
Message 18
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| Subject: | Re: electronic MAP control |
--> AeroElectric-List message posted by: "rwilliams" <rwilliams@C1ama.net>
As I mentioned in my original post, I was suspicious of the electric
supercharger. What I was really trying to ask was, "Is anyone utilizing an
electronic control for engine boost-either turbocharger/wastegate or other?"
Sorry that my question lead everyone off in the wrong direction.
The discussion of the Aerosance FADEC system has been interesting. Is
anyone working on a similar homerolled system?
Message 19
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| Subject: | Re: Essential Bus Diode Wiring |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 01:09 PM 7/14/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: "mailbox bob at
>mail.flyboybob.com" <bob@flyboybob.com>
>
>'Lectric Bob,
>
>On page Z-9 of The AeroElectric Connection, Figure Z-11 shows the full wave
>bridge rectifier being used to power the essential bus from the main bus.
>
>Why did you not connect the input side to both AC terminals? From the
>schematic it appears that this will give you twice the diode capacity.
>Wouldn't it be better to use two diodes at half the power each to get the
>same DC+ output result?
Diodes generally don't parallel well. I.e., if you're EXPECTING
to get twice the current capability by paralleling two diodes,
it doesn't work. Now, since a major goal of configuring the
elegant endurance bus is to MINIMIZE loads on battery while
conducting en route flight operations, then we're never
expecting to push the nominally 25A rated diodes toward their
limits. In this case, paralleling two diodes MIGHT have a
very slight effect on reducing forward voltage drop . . . perhaps
0.1 volts or so.
The short answer to you question is that it wouldn't hurt
anything but it wont be a big help either.
Bob . . .
Message 20
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--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 04:09 PM 7/14/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: Ken Harrill
><KHarrill@osa.state.sc.us>
>
>
>Dave,
>
>I used a LM-317T voltage regulator to provide ship's power to my DRE
>headsets. I talked with the DRE tech support and they suggested this
>approach. It works very well. I have had no problems with noise or headset
>damage.
>
>Ken Harrill
>RV-6, 215 hours
Thanks for that useful data point Ken . . .
Bob . . .
Message 21
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--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
For the real experimental types who want a bargain. The US government is auctioning 60-120 kw gas turbine power plants, also smaller Teledyne and Rotax engines on http://www.govliquidation.com/ Whether they are usable or not depends on how resourceful you are. They seem to be VERY low time powerplants. It might be worth a look.
Some government stuff is just a large box of stuff. The bid description says "Stuff
in large box". Often these are real deals. One "large shipping crate A/C
parts" some years ago went for $500 and it turned out to be an F104B.
Eric M. Jones
Message 22
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| Subject: | Re: power supply |
--> AeroElectric-List message posted by: "Dave von Linsowe" <davevon@tir.com>
Thanks to everyone for taking the time to come up with an inexpensive
(cheap) power supply for my ANR headsets. At the price of these, I can
build up a few of each, test them and have some for my buddies!
This list is great!
Thanks,
Dave
----- Original Message -----
From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
Subject: RE: AeroElectric-List: power supply
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<bob.nuckolls@cox.net>
>
> At 04:09 PM 7/14/2003 -0400, you wrote:
> >--> AeroElectric-List message posted by: Ken Harrill
> ><KHarrill@osa.state.sc.us>
> >
> >
> >Dave,
> >
> >I used a LM-317T voltage regulator to provide ship's power to my DRE
> >headsets. I talked with the DRE tech support and they suggested this
> >approach. It works very well. I have had no problems with noise or
headset
> >damage.
> >
> >Ken Harrill
> >RV-6, 215 hours
>
> Thanks for that useful data point Ken . . .
>
> Bob . . .
>
>
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