Today's Message Index:
----------------------
1. 08:58 AM - Re: voltage drop across relay (user9253)
2. 09:18 AM - Re: Re: voltage drop across relay (Ken Ryan)
3. 02:21 PM - Re: voltage drop across relay (user9253)
4. 02:35 PM - Re: Re: voltage drop across relay (Ken Ryan)
5. 06:05 PM - Wiring dual fuel pumps to single switch (carrollcw)
6. 08:32 PM - Re: Wiring dual fuel pumps to single switch (Charlie England)
7. 10:17 PM - Buy 2 get 1 free,Apple Iphone 6/6 plus/5S/5C,Sony Xperia Z3, (selings)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: voltage drop across relay |
The Rotax Installation Manual http://www.flyrotax.com/portaldata/5/dokus/d04967.pdf
shows a battery contactor between the battery and main bus and a 25 amp circuit
breaker between the main bus and the regulator. There are no small relays used
in the regulator circuit. During normal flight, only battery charging current
flows through the battery contactor. Any voltage drop across the battery
contactor does not affect the output of the voltage regulator. The Rotax wiring
diagram has a couple of issues: the master switch does NOT shut off the dynamo,
and the starter contactor is connected directly to the battery instead of
being in series with the master contactor like many E-AB aircraft are wired.
The schematic that Bob posted is not from Rotax but is actually from Van's Aircraft
RV-12. I recommend NOT using the Rotax schematic. Instead, wire the rectifier/regulator
per Van's schematic with the addition of a 5 amp fuse in the
terminal "C" circuit at the main bus. The regulator "C" sense circuit and "R+B"
output circuit should be wired with separate paths to the main bus. Then
the voltage drop to the "C" terminal will be minimized because only milliamps
will flow in its circuit. Less current results in less voltage drop. Bob, please
correct me if anything that I said is wrong.
See attached picture of the Rotax wiring diagram.
Below is the key to reference numbers on the Rotax wiring diagram:
1. Electronic modules (A and B)
2-3. plug connection for ignition switch
4. Integrated generator
5-6. External regulator - rectifier with plug connections
7. Electric starter
8-9. Starter relay with plug connection
10-12. External alternator with connections
13. Electric rev-counter
14. Capacitor 22,000 microfarad
15. Ignition switches
16. Master switch
17. Starter switch
18. Control lamp
19. Battery relay (contactor)
20. Battery
21. Bus bar
22. Capacitor
23. Plug connection for trigger coil assy.
24. Trigger coil assy. (tachometer)
25. Electrical fuel pump
26. Starting equipment at the electronic modules
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=435773#435773
Attachments:
http://forums.matronics.com//files/rotax_wiring_diagram_102.jpg
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: voltage drop across relay |
Joe, The Rotax diagram I'm looking at is for the 914 and it has the C wire
going through one relay plus the battery contactor. [Reference Link]
<http://www.flyrotax.com/portaldata/5/dokus/d04273.pdf>
On Tue, Dec 16, 2014 at 7:56 AM, user9253 <fransew@gmail.com> wrote:
>
>
> The Rotax Installation Manual
> http://www.flyrotax.com/portaldata/5/dokus/d04967.pdf
> shows a battery contactor between the battery and main bus and a 25 amp
> circuit breaker between the main bus and the regulator. There are no small
> relays used in the regulator circuit. During normal flight, only battery
> charging current flows through the battery contactor. Any voltage drop
> across the battery contactor does not affect the output of the voltage
> regulator. The Rotax wiring diagram has a couple of issues: the master
> switch does NOT shut off the dynamo, and the starter contactor is connected
> directly to the battery instead of being in series with the master
> contactor like many E-AB aircraft are wired.
> The schematic that Bob posted is not from Rotax but is actually from
> Van's Aircraft RV-12. I recommend NOT using the Rotax schematic. Instead,
> wire the rectifier/regulator per Van's schematic with the addition of a 5
> amp fuse in the terminal "C" circuit at the main bus. The regulator "C"
> sense circuit and "R+B" output circuit should be wired with separate paths
> to the main bus. Then the voltage drop to the "C" terminal will be
> minimized because only milliamps will flow in its circuit. Less current
> results in less voltage drop. Bob, please correct me if anything that I
> said is wrong.
>
> See attached picture of the Rotax wiring diagram.
> Below is the key to reference numbers on the Rotax wiring diagram:
> 1. Electronic modules (A and B)
> 2-3. plug connection for ignition switch
> 4. Integrated generator
> 5-6. External regulator - rectifier with plug connections
> 7. Electric starter
> 8-9. Starter relay with plug connection
> 10-12. External alternator with connections
> 13. Electric rev-counter
> 14. Capacitor 22,000 microfarad
> 15. Ignition switches
> 16. Master switch
> 17. Starter switch
> 18. Control lamp
> 19. Battery relay (contactor)
> 20. Battery
> 21. Bus bar
> 22. Capacitor
> 23. Plug connection for trigger coil assy.
> 24. Trigger coil assy. (tachometer)
> 25. Electrical fuel pump
> 26. Starting equipment at the electronic modules
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=435773#435773
>
>
> Attachments:
>
> http://forums.matronics.com//files/rotax_wiring_diagram_102.jpg
>
>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: voltage drop across relay |
> Joe, The Rotax diagram I'm looking at is for the 914 and it has the C wire going
through one relay plus the battery contactor.
Ken,
You are right. I was looking at the Rotax 912 schematic, not the 914 which has fuel injection. I can understand why the regulator "C" terminal is connected directly to the "R+B" terminals. They want the dynamo to supply power to the fuel pump with no way for the pilot to shut off the regulator. Therefore, I take back what I wrote about connecting terminal "C" according to the RV-12 schematic (unless all scenarios have been considered). If you wire the regulator according to Rotax's schematic and are concerned about the voltage drop across the regulator relay, then consider a double pole relay with the the poles connected in parallel. http://tinyurl.com/DPST-Relay
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=435785#435785
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: voltage drop across relay |
Joe, thanks for the DPST relay tip. The Rotax 914 isn't fuel injected (it's
turbocharged) but like a fuel injected engine it must have the electrical
fuel pump working in order to run.
On Tue, Dec 16, 2014 at 1:19 PM, user9253 <fransew@gmail.com> wrote:
>
>
>
> > Joe, The Rotax diagram I'm looking at is for the 914 and it has the C
> wire going through one relay plus the battery contactor.
>
> Ken,
> You are right. I was looking at the Rotax 912 schematic, not the 914
> which has fuel injection. I can understand why the regulator "C" terminal
> is connected directly to the "R+B" terminals. They want the dynamo to
> supply power to the fuel pump with no way for the pilot to shut off the
> regulator. Therefore, I take back what I wrote about connecting terminal
> "C" according to the RV-12 schematic (unless all scenarios have been
> considered). If you wire the regulator according to Rotax's schematic and
> are concerned about the voltage drop across the regulator relay, then
> consider a double pole relay with the the poles connected in parallel.
> http://tinyurl.com/DPST-Relay
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=435785#435785
>
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Wiring dual fuel pumps to single switch |
How can I wire a single dual pole switch to control 2 fuel pumps, only one of which
can operate at once with the switch being off bottom, pump 1 middle, pump
2 top. I also need each pump to have an independent power source. I thought I
could do it with a 2-1, but I can only get it to go on-off-on. Is there a dual
pole switch that will accomplish this?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=435793#435793
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Wiring dual fuel pumps to single switch |
On 12/16/2014 8:03 PM, carrollcw wrote:
>
> How can I wire a single dual pole switch to control 2 fuel pumps, only one of
which can operate at once with the switch being off bottom, pump 1 middle, pump
2 top. I also need each pump to have an independent power source. I thought
I could do it with a 2-1, but I can only get it to go on-off-on. Is there a dual
pole switch that will accomplish this?
>
>
A mechanical failure of the switch could take out both pumps; is that
acceptable?
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Buy 2 get 1 free,Apple Iphone 6/6 plus/5S/5C,Sony Xperia |
Z3,
For Quick Order contact US
Skype :seling.source
Whatsapp /call: +254773036008
Text/sms : +17075748774
Email.: selingsource@gmail.com
Buy at affordable price Xmas Promotion sales
Apple iPhone 6plus 128GB -$500usd
Apple iPhone 6plus 64GB-- $450usd
Apple iPhone 6plus 16GB-- $400usd
Apple iPhone 6 16gb
Apple iPhone 6 64GB
Apple iPhone 6 128GB
Apple iPhone 5s 64gb Gold
Apple iPhone 5s 32gb Gold
Apple iPhone 5s 16gb Gold
Apple iPhone 5c 32gb
Apple iPhone 5c 16gb
Apple Iphone 5 64GB
Apple Iphone 5 32GB
Apple Iphone 5 16GB
Apple iPad Air Wi-Fi 5th Gen
Apple iPad Air 2
Apple iPad Mini 3 Wi-Fi 4G 64gb
Apple iPad Mini 3 Wi-Fi 4G 32gb
Apple iPad Mini 3 Wi-Fi 4G 16gb
Microsoft Lumia 535
Samsung Galaxy Note 4
Samsung Galaxy S5
Samsung Galaxy Note 3
samsung Galaxy S4 Active LTE-A
Samsung Galaxy S4 i9505
Samsung Galaxy Star Trios S5283
Samsung Galaxy Note 3 Neo Duos
Samsung Galaxy Note 3 Neo
Samsung Galaxy Tab 3 Lite 7.0 3G
Samsung Galaxy Grand Neo
Samsung Galaxy Note Pro 12.2 LTE
Samsung Galaxy Tab Pro 10.1 LTE
Sealed Sony Playstation 4 Console 500gb (ps4, Ntsc/usa, Jet Black)
Blackberry Porsche Design P'9983
Blackberry Passport
BlackBerry Porsche Design P9982
Blackberry Z3
Blackberry Z30
Blackberry Q10
BlackBerry Porsche Design P9981
Sony Xperia E3 Dual
Sony Xperia Z3
Sony Xperia Z2
Sony Xperia E1 dual
Sony Xperia E1
Sony Xperia T2 Ultra dual
Sony Xperia T2 Ultra
Sony Xperia Z1s
Sony Xperia Z1 Compact
Sony Xperia Z1
Motorola Moto G Dual SIM
Motorola Moto G
Motorola Moto X
Motorola DROID Ultra
Motorola DROID Maxx
Motorola RAZR D3 XT919
Motorola RAZR D1
HTC Nexus 9
HTC One (M8)
HTC Desire 310
HTC Desire 501 dual sim
HTC Desire 700 dual sim
HTC Desire 601 dual sim
LG G Pro 2
LG Optimus L1 II Tri E475
LG Optimus F3Q
Nokia X
Nokia X+
Nokia Lumia Icon
Nokia Lumia 525
Nokia Lumia 1520
Nokia Lumia 1320
Nokia Lumia 925
Nokia Lumia 928
Apple Macbook Air
Apple MacBook Pro
Nikon D800 36.3 MP FX-format CMOS Digital SLR
Nikon D3X Digital SLR with 24.5 Mp
Nikon D700 Digital SLR Camera with AF-S 24-70mm
Nikon D4 16.2 megapixel digital SLR camera
Nikon D90 Digital SLR with AF-S DX NIKKOR 18-105mm
Nikon D300 Digital SLR Camera with 18-200mm DX AF-S
Nikon D60 10.2MP Digital SLR Camera with 18-55mm
Nikon D80 DSLR with AF-S DX 18-135mm .... $ 800
Nikon D7000 16.2MP DX Format CMOS Digital SLR with 3.0-inch
Canon EOS 5D Mark III Digital SLR Camera with EF 24-105mm
Canon EOS 5D Mark II Digital SLR Camera with EF 24-105mm
Canon EOS-1D X Digital SLR Camera, 18.1 Mp
Canon EOS 7D Digital SLR with EF 28-135mm
Canon EOS 50D Digital SLR Camera with 28-135mm EF
Canon EOS 40D Digital SLR Camera with EF 28-135mm
Canon EOS 600D Digital SLR with 18-200mm IS lens
Yamaha Tyros 5 61 Key Keyboard Cost $2,300usd
Yamaha Tyros4 61-Key Arranger Workstation Keyboard cost $1,500usd
Yamaha Tyros3 61-Key Arranger Workstation Keyboard TYROS3 cost $800usd
Yamaha Cp300 cost $500usd
Yamaha Motif XS8 Synthesizer 88 Key Demo cost $730usd
Yamaha Arius YDP 160 Digital Piano $400usd
Yamaha CP33 Stage Piano cost $380usd
Yamaha PSR-S900 Portable Keyboard cost $400usd
Yamaha MOTIF XS6 Synthesizer cost $940usd
Korg M3 Workstation 61 Key Pro Keyboard cost $580usd
Korg M3 88 Key Workstation Keyboard cost $750usd
Korg M3-73 Workstation cost $760usd
Korg Pa800 Synthesizer cost $780usd
Rawlings 5' Classic Grand Piano (Walnut Polish) cost $1400usd
Rawlings 50" Professional Upright Piano (Mahogany Polish) cost $700usd
5' Queen Anne Grand Piano (Ebony Polish) cost $1,800usd
Roland RD700GX Digital Piano cost $750usd
Clavia Nord Stage 88 EX cost $780usd
For Quick Order contact info below
Skype :seling.source
Whatsapp /call: +254773036008
Text/sms : +17075748774
Email.: selingsource@gmail.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=435803#435803
Attachments:
http://forums.matronics.com//files/1x_204.jpg
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|