Today's Message Index:
----------------------
1. 07:58 AM - Re: Backup battery for fuel pumps? (user9253)
2. 08:07 AM - SkyView power wires (user9253)
3. 08:18 AM - After 30 years... (Harley)
4. 08:20 AM - Re: Re: Backup battery for fuel pumps? (Robert Borger)
5. 08:37 AM - Re: After 30 years... (Robert Reed)
6. 08:44 AM - Re: Re: Backup battery for fuel pumps? (Roger & Jean Curtis)
7. 08:47 AM - Re: Re: Backup battery for fuel pumps? (Jeff Luckey)
8. 08:48 AM - Re: After 30 years... (Harley)
9. 08:57 AM - Re: SkyView power wires (John Grosse)
10. 09:51 AM - Re: Re: Backup battery for fuel pumps? (Robert L. Nuckolls, III)
11. 10:02 AM - Re: After 30 years... (Bill Watson)
12. 10:03 AM - Re: After 30 years... (Robert L. Nuckolls, III)
13. 10:25 AM - Re: After 30 years... (Harley)
14. 10:27 AM - Re: SkyView power wires (Robert L. Nuckolls, III)
15. 10:33 AM - Re: Mag noise (Robert L. Nuckolls, III)
16. 11:54 AM - Re: cable noises (Robert L. Nuckolls, III)
17. 04:39 PM - Fuel Pressure Sensor search (John Loram)
18. 04:52 PM - Flap Control Schematic - will it work? (Robert Reed)
19. 05:22 PM - Re: Flap Control Schematic - will it work? (Daniel Hooper)
20. 05:57 PM - Re: Flap Control Schematic - will it work? (Jeff Luckey)
21. 06:27 PM - Re: Flap Control Schematic - will it work? (Robert Reed)
22. 06:36 PM - Re: Flap Control Schematic - will it work? (Robert Reed)
23. 06:37 PM - Re: Flap Control Schematic - will it work? (Robert Reed)
24. 06:50 PM - Re: Fuel Pressure Sensor search (Robert L. Nuckolls, III)
25. 08:13 PM - Re: Flap Control Schematic - will it work? (Nati Niv)
26. 08:39 PM - Re: Fuel Pressure Sensor search (Richard E. Tasker)
27. 08:40 PM - Re: Flap Control Schematic - will it work? (Robert Reed)
28. 08:54 PM - Re: Flap Control Schematic - will it work? (Nati Niv)
29. 09:42 PM - Re: Flap Control Schematic - will it work? (Nati Niv)
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: Backup battery for fuel pumps? |
This is not an electrical question, but relates to the previous question about
fuel pumps. What are the pro and cons about plumbing fuel pumps in parallel compared
to series? My concern is the failure of a check valve when fuel pumps
are in parallel. The pilot might not be aware of a check valve failure until
its associated pump also fails. Then the good pump will be circulating fuel
in a loop through the failed check valve. The fuel pressure to the engine could
be reduced. Or is this concern unwarranted?
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=383060#383060
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: | SkyView power wires |
Quote from SkyView installation manual:
> Power Input
> SkyView displays have a primary power input that is compatible with 12 volt and
24 volt systems (10 to 30 volts DC). There are two unterminated solid red primary
power input wires (to reduce current loading in each wirethese are not
for redundancy and both should be connected to the same power source) and two
unterminated solid black primary ground wires.
> Ensure that there is an appropriately rated circuit breaker or replaceable
fuse on the primary power input. A 5 amp circuit breaker or replaceable fuse is
sufficient for the majority of installations. Reference the Power Consumption
Section of the System Planning Chapter for more information.
I do not understand the reasoning for using two power wires instead of one larger
wire. In fact, it would seem that just one small wire would handle the 5 amp
load with ease.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=383063#383063
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: | After 30 years... |
Here it is...at last. After 30 years of working on N28EZ it's
ready to go down to the hangar and join up with it's already
finished wings, drain the tanks, do the weight and balance and
call the FAA! And do whatever else I find is needed to get it flying.
This was just a quick video with the cowlings on for appearance
sake...I've already run it several times without the cowl to set
the idle, check the gauges, temperatures, etc. It has dual P-mags
and a Dynon D-180, Anywhere Map Pro, B&C alternator and starter,
Microair radio and transponder, etc. All gauges, switches and
readouts performed as expected in the earlier runs! RPM, voltages
and temperatures were in the ball park. Modified Z13-8 wiring.
Started with the Z13-8, then modified it as I went along.
This last video, though, it couldn't wait for me to finish...at
2250 RPM, it jumped the right chock and tried to fly!
http://youtu.be/LJVIl1ERwSA
Harley Dixon
Long EZ N28EZ (finally all done...just have to reassemble)
Hangar 29
Canandaigua Airport, Canandaigua, NY
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: Backup battery for fuel pumps? |
Joe,
It all depends on the pump. On my Rotax 914 the standard arrangement is for two
pumps in series, each paralleled with a check valve. In case a failed pump
will not pass fuel there's a parallel check valve to ensure fuel flow.
Odds of a check valve failure are approaching zero.
You can make up a similar parallel setup with check valves on the output of each
pump to ensure there's no back flow through a failed pump.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop.
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger@mac.com
On Sep 14, 2012, at 9:56 AM, user9253 <fran4sew@banyanol.com> wrote:
This is not an electrical question, but relates to the previous question about
fuel pumps. What are the pro and cons about plumbing fuel pumps in parallel compared
to series? My concern is the failure of a check valve when fuel pumps
are in parallel. The pilot might not be aware of a check valve failure until
its associated pump also fails. Then the good pump will be circulating fuel
in a loop through the failed check valve. The fuel pressure to the engine could
be reduced. Or is this concern unwarranted?
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=383060#383060
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: | Re: After 30 years... |
Contrats!!!- Maybe there is hope that I will eventually finish my KIS Cru
iser as =0Awell.- Why is it that life keeps getting in the way of our mor
e important =0Ahobbies???=0A=0A=0A=0A=0A________________________________=0A
From: Harley <harley@AgelessWings.com>=0ATo: aeroelectric-list@matronics.co
m=0ASent: Fri, September 14, 2012 10:19:34 AM=0ASubject: AeroElectric-List:
After 30 years...=0A=0A=0A=0AHere it is...at last.- After 30 years of wo
rking on N28EZ it's ready to go down =0Ato the hangar and join up with it's
already finished wings,- drain the tanks, do =0Athe weight and balance a
nd call the FAA! And do whatever else I find is needed =0Ato get it flying.
=0A=0AThis was just a quick video with the cowlings on for appearance sake.
..I've =0Aalready run it several times without the cowl to set the idle, ch
eck the gauges, =0Atemperatures, etc. It has dual P-mags and a Dynon D-180,
Anywhere Map Pro, B&C =0Aalternator and starter,- Microair radio and tra
nsponder, etc.- All gauges, =0Aswitches and readouts performed as expecte
d in the earlier runs! RPM, voltages =0Aand temperatures were in the ball p
ark. Modified Z13-8 wiring. Started with the =0AZ13-8, then modified it as
I went along.- =0A=0A=0AThis last video, though, it couldn't wait for me
to finish...at 2250 RPM, it =0Ajumped the right chock and tried to fly! =0A
=0A=0Ahttp://youtu.be/LJVIl1ERwSA=0A=0AHarley Dixon=0ALong EZ N28EZ (finall
y all done...just have to reassemble)=0AHangar 29 =0ACanandaigua Airport, C
= =0A
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: Backup battery for fuel pumps? |
This is not an electrical question, but relates to the previous question
about fuel pumps. What are the pro and cons about plumbing fuel pumps in
parallel compared to series? My concern is the failure of a check valve
when fuel pumps are in parallel. The pilot might not be aware of a check
valve failure until its associated pump also fails. Then the good pump will
be circulating fuel in a loop through the failed check valve. The fuel
pressure to the engine could be reduced. Or is this concern unwarranted?
Joe
I would think that you would normally do a fuel pump test as part of
your preflight, i.e. turn each pump on one at a time and check pressure.
This will check the pump op and the check valve. It is highly unlikely that
you will have both a pump and a check valve failure simultaneously.
Roger
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: | Re: Backup battery for fuel pumps? |
What does putting the pumps in series do for you? It seems that plumbing
the pumps in parallel would accomplish fuel delivery and be a little
simpler?
_____
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert
Borger
Sent: Friday, September 14, 2012 08:21
Subject: Re: AeroElectric-List: Re: Backup battery for fuel pumps?
Joe,
It all depends on the pump. On my Rotax 914 the standard arrangement is for
two pumps in series, each paralleled with a check valve. In case a failed
pump will not pass fuel there's a parallel check valve to ensure fuel flow.
Odds of a check valve failure are approaching zero.
You can make up a similar parallel setup with check valves on the output of
each pump to ensure there's no back flow through a failed pump.
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop.
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger@mac.com
On Sep 14, 2012, at 9:56 AM, user9253 <fran4sew@banyanol.com> wrote:
This is not an electrical question, but relates to the previous question
about fuel pumps. What are the pro and cons about plumbing fuel pumps in
parallel compared to series? My concern is the failure of a check valve
when fuel pumps are in parallel. The pilot might not be aware of a check
valve failure until its associated pump also fails. Then the good pump will
be circulating fuel in a loop through the failed check valve. The fuel
pressure to the engine could be reduced. Or is this concern unwarranted?
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=383060#383060
- The --> &n========================<b -
&nbs --> =======================
Message 8
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: After 30 years... |
When I retired, I thought that I would be able to zip right
through it...but then I came down with a little medical
problem...leukemia.
Took 8 years to get to the point this year where the FAA finally
approved me to fly again...meanwhile, I worked on the plane
whenever I could...took time, but well worth it to hear it start
and run...especially as well as it does with all the new gadgets
on it! A lot of instrumentation changes since I first started it
in 1982!
Harley
-----------------------------------------------------------------
On 9/14/2012 11:36 AM, Robert Reed wrote:
> Contrats!!! Maybe there is hope that I will eventually finish
> my KIS Cruiser as well. Why is it that life keeps getting in
> the way of our more important hobbies???
>
> -----------------------------------------------------------------
> *From:* Harley <harley@AgelessWings.com>
> *To:* aeroelectric-list@matronics.com
> *Sent:* Fri, September 14, 2012 10:19:34 AM
> *Subject:* AeroElectric-List: After 30 years...
>
>
> Here it is...at last. After 30 years of working on N28EZ it's
> ready to go down to the hangar and join up with it's already
> finished wings, drain the tanks, do the weight and balance and
> call the FAA! And do whatever else I find is needed to get it
> flying.
>
> This was just a quick video with the cowlings on for appearance
> sake...I've already run it several times without the cowl to
> set the idle, check the gauges, temperatures, etc. It has dual
> P-mags and a Dynon D-180, Anywhere Map Pro, B&C alternator and
> starter, Microair radio and transponder, etc. All gauges,
> switches and readouts performed as expected in the earlier
> runs! RPM, voltages and temperatures were in the ball park.
> Modified Z13-8 wiring. Started with the Z13-8, then modified it
> as I went along.
>
> This last video, though, it couldn't wait for me to finish...at
> 2250 RPM, it jumped the right chock and tried to fly!
>
> http://youtu.be/LJVIl1ERwSA
>
> Harley Dixon
> Long EZ N28EZ (finally all done...just have to reassemble)
> Hangar 29
> Canandaigua Airport, Canandaigua, NY
>
>
> *cs.com/Navigator?AeroElectric-List" rel=nofollow target=_blank>http://wt;n" rel=nofollow target=_blank>http://www.matronics.com/contribution <http://forums.matronics.com/>===========
>
> *
> *
>
>
> *
>
> No virus found in this message.
> Checked by AVG - www.avg.com <http://www.avg.com>
> Date: 09/14/12
>
Message 9
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: SkyView power wires |
Have you asked the SkyView people? The rest of us can only guess at
their rationale for the "why". Personally, I can't imagine any reason,
but I have seen other applications where a larger wire would not fit in
the connector and two smaller wires were used.
John Grosse
user9253 wrote:
> --> AeroElectric-List message posted by: "user9253"<fran4sew@banyanol.com>
>
> Quote from SkyView installation manual:
>
>> > Power Input
>> > SkyView displays have a primary power input that is compatible with 12 volt
and 24 volt systems (10 to 30 volts DC). There are two unterminated solid red
primary power input wires (to reduce current loading in each wirethese are
not for redundancy and both should be connected to the same power source) and
two unterminated solid black primary ground wires.
>> > Ensure that there is an appropriately rated circuit breaker or replaceable
fuse on the primary power input. A 5 amp circuit breaker or replaceable fuse
is sufficient for the majority of installations. Reference the Power Consumption
Section of the System Planning Chapter for more information.
>
> I do not understand the reasoning for using two power wires instead of one larger
wire. In fact, it would seem that just one small wire would handle the 5
amp load with ease.
> Joe
>
> --------
> Joe Gores
Message 10
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: Backup battery for fuel pumps? |
At 10:20 AM 9/14/2012, you wrote:
Joe,
It all depends on the pump. On my Rotax 914 the standard arrangement
is for two pumps in series, each paralleled with a check valve. In
case a failed pump will not pass fuel there's a parallel check valve
to ensure fuel flow.
Has anyone explored the cracking pressures for the
two check valves built into Facet/Purolator style
pumps? As Joe suggests, the probability of failure
for a check valve (48 and 58) is very low. It might
stick OPEN due to some obstruction and filters are
supposed to stop that.
Emacs!
P
For a pair of pumps plumbed in series, it seems that either
pump would function with the other powered down unless the
cracking pressure for valves in the inactive pump are too
great and a low-pressure by-pass valved is called for.
These pumps are MOST likely to quit due to lack of power.
Given their all solid state, free-running excitation philosophy,
See: http://www.freepatentsonline.com/7150606.pdf
. . . there is no part of this pump that is highly stressed or
subject to wear. Dual pumps would address a HOST of ancillary
failures like broken wires, bad switch, bad breaker, loss of
buss, etc. Two, totally independent pumps/controls/protection/
power source pretty much covers the bases. This extra plumbing
and check valve thing may be an exercise in unsubstantiated
worrying. Some simple tests would confirm/deny validity
of the concern.
Bob . . .
Message 11
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: After 30 years... |
Yes, it looks like it needs to fly. Congratulations!
Bill Watson
On 9/14/2012 11:17 AM, Harley wrote:
>
> Here it is...at last. After 30 years of working on N28EZ it's ready
> to go down to the hangar and join up with it's already finished
> wings, drain the tanks, do the weight and balance and call the FAA!
> And do whatever else I find is needed to get it flying.
>
> This was just a quick video with the cowlings on for appearance
> sake...I've already run it several times without the cowl to set the
> idle, check the gauges, temperatures, etc. It has dual P-mags and a
> Dynon D-180, Anywhere Map Pro, B&C alternator and starter, Microair
> radio and transponder, etc. All gauges, switches and readouts
> performed as expected in the earlier runs! RPM, voltages and
> temperatures were in the ball park. Modified Z13-8 wiring. Started
> with the Z13-8, then modified it as I went along.
>
> This last video, though, it couldn't wait for me to finish...at 2250
> RPM, it jumped the right chock and tried to fly!
>
> http://youtu.be/LJVIl1ERwSA
>
> Harley Dixon
> Long EZ N28EZ (finally all done...just have to reassemble)
> Hangar 29
> Canandaigua Airport, Canandaigua, NY
Message 12
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: After 30 years... |
>This last video, though, it couldn't wait for me to finish...at 2250
>RPM, it jumped the right chock and tried to fly!
Cool! Looks like you're getting close . . . but please
consider acquiring on-purpose wheel chocks. Airplanes
with the fans on the front can at least be tied to a
post, pushers demand a different precaution. It would
be a shame to drag the airplane back to the shop for
repairs . . . or cart you to the hospital . . .
Post some first flight photos and videos!
Bob . . .
Message 13
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: After 30 years... |
Actually, that video was just a last minute thought...after I had
the cowlings mounted, I though I'd take that just for my friends
who would think it was even more unfinished if they could see the
motor. I made the nose bumper from a hopper mount I rescued from
work...it is hard rubber, molded around a steel plate with 3/8-16
threaded tube in it... I have a ring bolt that I thread into it
and then lash that to the battery outside the plane when I want
to keep it from moving...tying it down from the front! I use
normal chocks as well...just not for that video!
Pictures and videos will definitely be following.
Harley
-----------------------------------------------------------------
>> This last video, though, it couldn't wait for me to
>> finish...at 2250 RPM, it jumped the right chock and tried to fly!
>
> Cool! Looks like you're getting close . . . but please
> consider acquiring on-purpose wheel chocks. Airplanes
> with the fans on the front can at least be tied to a
> post, pushers demand a different precaution. It would
> be a shame to drag the airplane back to the shop for
> repairs . . . or cart you to the hospital . . .
>
> Post some first flight photos and videos!
>
> Bob . . .
>
>
Message 14
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: SkyView power wires |
>
>I do not understand the reasoning for using two power wires instead
>of one larger wire. In fact, it would seem that just one small wire
>would handle the 5 amp load with ease.
>Joe
That IS a puzzlement . . . I don't recall the first
time I saw doubled-up power and ground wires on
radios . . . but it was some years back. Why
would a designer think that paralleled 20AWG
wires on a 0.5A continuous, 4A intermittent
load be a good thing to do? I think I've
seen it on more than one brand of radio.
Reduced supply impedance? Not very likely.
Increased redundancy? Hmmmm . . . more
plausible. Redundancy is not well addressed
. . . one of the wires could be bad and you\
wouldn't know it. I.e. redundancy that calls
for periodic inspection to retain its value
in the reliability tree. Current sharing on
d-sub pins? Also plausible but again, the pins
are not really being stressed that hard.
The conundrum does not yield to present
reasoning.
If it were my radio, I'd do the paralleling
thing with 6 inch, 22AWG wires in the pins
dropped into a splice with 20AWG lead wire
to power and ground. Robust . . . and doesn't
let a perfectly good ground or power pin go
to waste.
Bob . . .
Message 15
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 |
|
>The shields should be grounded at the engine end only.
>I think this may fix your problem.
Thank you for your quick response to my problem. I have been
wrestling with this for two weeks. Every book I have on the subject
says to ground both ends of the shielding. In any event I took your
advise and the noise is gone. Medicine Lodge brings back memories to
me, I went to school at Emporia and my roomate was from there. I
trained on B-29s at Smoky Hill Air Base in WWII. Thank you again for
your help, it is much appreciated. Ed Dunn
I think this is perhaps the third time this
particular set of conditions propagated ignition
noise into the rest of the airplane. I'm not
sure I understand the exact mode of propagation
for noise but whether we understand it or not,
it's a demonstrably good thing to do.
Bob . . .
Message 16
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: cable noises |
At 11:14 AM 9/14/2012, you wrote:
Hello Bob,
I don't really know if I'm writting this message to the right
address, I actually wanted to post a message in the general forum but
haven't figured out how to do so; so this is why I'm writing you.
I see you're already signed up for a number of
lists on matronics. You've probably discovered that
you can join a conversation by simply replying to
a message. You can start a new one by simply sending
your query to aeroelectric-list@matronics.com
This will start a new conversation titled with what
ever words you put in the subject line.
I'm a builder of an RV7A in Spain and just wanted to ask for some
advise regarding the way that the antenna cables need to be routed
inside the plane. In other words, I know that big pulses like the
strobes will generate noise in the antena cables if they come close
enough, but what about bundling several antenna cables together like
the VOR, coms, gps and marker for example; can they interfere each
other or cause noise to each other? Also besides the strobe power
cables, what other cable should run far enough from the antenna
cables typically, and also what is "far enough" reasonable?
Actually, there's no practical value for separating properly
installed coax cables from other properly installed system
wires. In the heavy iron airplanes, every system installer
will fight tooth and nail to secure space and volume in
the airplane for his task. Wires running from one place to
another MUST join with wires from any and all other systems
who have found favor with the airframe turf-gods.
Artfully designed and installed systems for aircraft will
happily co-exist both for location of black-boxes and
airframe wire routes. So bundle your wires for convenience and
judicious used of space and $time$. If you find that you
do have a problem, it's generally easier to fix the
errors of installation than to put a band-aid on it
(repositioning, ferrite beads, filters, etc.).
Use good coax. RG-400/141/142 or LMR-195 and good practice
for termination. You've got a 99.9% probability of being
golden.
Bob . . .
Message 17
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: | Fuel Pressure Sensor search |
Searching for a low pressure 7.5psi (0.5 bar) fuel (avgas) pressure sensor.
Can be either two or three terminal.
thanks for leads (brands or unused items), -john-
Message 18
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: | Flap Control Schematic - will it work? |
All,=0A-=0AAttached is my plan for a flap control system using a Rotary 4
position switch =0Ato control the flaps with LED indicators to show the po
sition settings.- The =0Arotary switch will have a lever that not only gi
ves a tactile feel indicating =0Aposition but will point to the LED.- I b
elieve this setup will work but would =0Alike some review.- I have also i
ncluded absolute limit switched to ensure that =0Aan over-run will not occu
r due to a bad relay.=0A-=0ABob Reed
Message 19
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: Flap Control Schematic - will it work? |
I like your idea, using simple limit switches and relays for position
control, but it I'm having trouble with what will happen under the
following condition:
Say for the sake of clarity the flap positions are up, 10, 20, and 30..
The flaps are up, and the green LED is lit.
I set flaps to 20, which will open the 10 switch, then the 20 switch.
The flap movement completes and the 20 deg yellow LED lights.
I set flaps back to 10, because I didn't mean to go all the way to 20.
...
=46rom what I can see, the yellow 10 LED will be lit, but the flaps will
not move from the 20 degree position.
That is, to get the flaps to retract under any circumstance, you need to
turn the knob to 'up'.
It's possible I'm not seeing something though.
You definitely should turn the LEDs around so that they "point" to
ground, and you'll either need to use 12V LEDs with internal resistors,
or provide series resistors somewhere in the range of 1k Ohm.
I like your limit cutoff switches -- it makes the flaps retractable or
extendable even if the limit is somehow hit due to a transient problem.
It might be handy to add 'limit cutoff' LEDs on them as well.
--Daniel
On Sep 14, 2012, at 6:51 PM, Robert Reed wrote:
> All,
>
>
> Attached is my plan for a flap control system using a Rotary 4
position switch to control the flaps with LED indicators to show the
position settings. The rotary switch will have a lever that not only
gives a tactile feel indicating position but will point to the LED. I
believe this setup will work but would like some review. I have also
included absolute limit switched to ensure that an over-run will not
occur due to a bad relay.
>
>
> Bob Reed
>
> <N247BR Flap Control.pdf>
Message 20
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: | Flap Control Schematic - will it work? |
Robert see: http://www.youtube.com/watch?v=OcBvmL-FxYQ
It's a demo of a flap controller that uses a pot for position-sense & is
field_programmable.
_____
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert
Reed
Sent: Friday, September 14, 2012 16:52
Subject: AeroElectric-List: Flap Control Schematic - will it work?
All,
Attached is my plan for a flap control system using a Rotary 4 position
switch to control the flaps with LED indicators to show the position
settings. The rotary switch will have a lever that not only gives a tactile
feel indicating position but will point to the LED. I believe this setup
will work but would like some review. I have also included absolute limit
switched to ensure that an over-run will not occur due to a bad relay.
Bob Reed
Message 21
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: Flap Control Schematic - will it work? |
Daniel, =0A=0AYou are correct, the setup will step down but not up.- Turn
ing the switch back =0Ato 10 would stop the movement if beyond the 10 degre
es but would not return it =0Ato 10 degrees.- In trying to maintain the K
ISS design could not come up with a =0Asimple return to the prior setting
- I agree with the indicators for the overrun =0Alimit switches and have
considered that.- I do have the 12v LED's but wasn't =0Aaware of the diff
erence on the symbols.- =0A=0A=0AThanks for your input.=0A=0ABob=0A=0A=0A
=0A=0A________________________________=0AFrom: Daniel Hooper <enginerdy@gma
il.com>=0ATo: aeroelectric-list@matronics.com=0ASent: Fri, September 14, 20
12 7:24:05 PM=0ASubject: Re: AeroElectric-List: Flap Control Schematic - wi
ll it work?=0A=0AI like your idea, using simple limit switches and relays f
or position control, =0Abut it I'm having trouble with what will happen und
er the following condition: =0A=0A=0ASay for the sake of clarity the flap p
ositions are up, 10, 20, and 30..=0A=0AThe flaps are up, and the green LED
is lit.=0AI set flaps to 20, which will open the 10 switch, then the 20 swi
tch. The flap =0Amovement completes and the 20 deg yellow LED lights.=0AI s
et flaps back to 10, because I didn't mean to go all the way to 20.=0A...
=0AFrom what I can see, the yellow 10 LED will be lit, but the flaps will n
ot move =0Afrom the 20 degree position.=0A=0AThat is, to get the flaps to r
etract under any circumstance, you need to turn =0Athe knob to 'up'.=0A=0AI
t's possible I'm not seeing something though.=0A=0A=0AYou definitely should
turn the LEDs around so that they "point" to ground, and =0Ayou'll either
need to use 12V LEDs with internal resistors, or provide series =0Aresistor
s somewhere in the range of 1k Ohm.=0A=0AI like your limit cutoff switches
-- it makes the flaps retractable or =0Aextendable even if the limit is som
ehow hit due to a transient problem. It might =0Abe handy to add 'limit cut
off' LEDs on them as well.=0A=0A--Daniel=0A=0A=0A=0AOn Sep 14, 2012, at 6:5
1 PM, Robert Reed wrote:=0A=0AAll,=0A>-=0A>=0A>Attached is my plan for a
flap control system using a Rotary 4 position switch =0A>to control the fla
ps with LED indicators to show the position settings.- The =0A>rotary swi
tch will have a lever that not only gives a tactile feel indicating =0A>pos
ition but will point to the LED.- I believe this setup will work but woul
d =0A>like some review.- I have also included absolute limit switched to
ensure that =0A>an over-run will not occur due to a bad relay.=0A>-=0A>
====== =0A
Message 22
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: Flap Control Schematic - will it work? |
One thought...should I reverse the setup on the Over Retract Limit switch?
- =0AAfter looking at it I think it would result in a direct short to gro
und which =0Awould probably blow the fuse.- Am I thinking right?- What
I am trying to =0Aaccomplish is to break the circuit while still allowing t
he reversal.=0A=0ABob=0A=0A=0A=0A=0A________________________________=0AFrom
: Daniel Hooper <enginerdy@gmail.com>=0ATo: aeroelectric-list@matronics.com
=0ASent: Fri, September 14, 2012 7:24:05 PM=0ASubject: Re: AeroElectric-Lis
t: Flap Control Schematic - will it work?=0A=0AI like your idea, using simp
le limit switches and relays for position control, =0Abut it I'm having tro
uble with what will happen under the following condition: =0A=0A=0ASay for
the sake of clarity the flap positions are up, 10, 20, and 30..=0A=0AThe fl
aps are up, and the green LED is lit.=0AI set flaps to 20, which will open
the 10 switch, then the 20 switch. The flap =0Amovement completes and the 2
0 deg yellow LED lights.=0AI set flaps back to 10, because I didn't mean to
go all the way to 20.=0A...=0AFrom what I can see, the yellow 10 LED will
be lit, but the flaps will not move =0Afrom the 20 degree position.=0A=0ATh
at is, to get the flaps to retract under any circumstance, you need to turn
=0Athe knob to 'up'.=0A=0AIt's possible I'm not seeing something though.
=0A=0A=0AYou definitely should turn the LEDs around so that they "point" to
ground, and =0Ayou'll either need to use 12V LEDs with internal resistors,
or provide series =0Aresistors somewhere in the range of 1k Ohm.=0A=0AI li
ke your limit cutoff switches -- it makes the flaps retractable or =0Aexten
dable even if the limit is somehow hit due to a transient problem. It might
=0Abe handy to add 'limit cutoff' LEDs on them as well.=0A=0A--Daniel=0A
=0A=0A=0AOn Sep 14, 2012, at 6:51 PM, Robert Reed wrote:=0A=0AAll,=0A>-
=0A>=0A>Attached is my plan for a flap control system using a Rotary 4 posi
tion switch =0A>to control the flaps with LED indicators to show the positi
on settings.- The =0A>rotary switch will have a lever that not only gives
a tactile feel indicating =0A>position but will point to the LED.- I bel
ieve this setup will work but would =0A>like some review.- I have also in
cluded absolute limit switched to ensure that =0A>an over-run will not occu
r due to a bad relay.=0A>-=0A>=0A>Bob Reed<N247BR Flap Control.pdf>=0A=0A
================= =0A
Message 23
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: Flap Control Schematic - will it work? |
I like where they are going with it.=0A=0ABOB=0A=0A=0A=0A=0A_______________
_________________=0AFrom: Jeff Luckey <JLuckey@pacbell.net>=0ATo: aeroelect
ric-list@matronics.com=0ASent: Fri, September 14, 2012 7:58:07 PM=0ASubject
: RE: AeroElectric-List: Flap Control Schematic - will it work?=0A=0A=0ARob
ert see: http://www.youtube.com/watch?v=OcBvmL-FxYQ=0A=C2-=0AIt
=99s a demo of a flap controller that uses a pot for position-sense & is
=0Afield_programmable.=0A=C2-=0A=C2-=0A=0A_____________________________
___=0A=0AFrom:owner-aeroelectric-list-server@matronics.com =0A[mailto:owner
-aeroelectric-list-server@matronics.com] On Behalf Of Robert Reed=0ASent: F
riday, September 14, 2012 16:52=0ATo: aeroelectric-list@matronics.com=0ASub
ject: AeroElectric-List: Flap Control Schematic - will it work?=0A=C2-=0A
All,=0A=C2-=0AAttached is my plan for a flap control system using a Rotar
y 4 position switch =0Ato control the flaps with LED indicators to show the
position settings.=C2- The =0Arotary switch will have a lever that not o
nly gives a tactile feel indicating =0Aposition but will point to the LED.
=C2- I believe this setup will work but would =0Alike some review.=C2-
I have also included absolute limit switched to ensure that =0Aan over-run
============ =0A
Message 24
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: Fuel Pressure Sensor search |
At 06:38 PM 9/14/2012, you wrote:
>
>Searching for a low pressure 7.5psi (0.5 bar) fuel (avgas) pressure sensor.
>Can be either two or three terminal.
>
>thanks for leads (brands or unused items), -john-
Finding such a critter with a full scale
range that small is problematic . . . especially
one with all metal pressure-side materials
that would be okay with gasoline.
Suggest you look at something like this
http://tinyurl.com/9uw647y
http://tinyurl.com/8unuxge
http://tinyurl.com/983v7o7
http://tinyurl.com/99xfyrs
This is a small sample of possibilities.
They're all aerospace grade devices at
very reasonable prices compared to off the
shelf new. Even as used devices, transducers
of this genre' are likely to be a better
value than automotive devices.
Bob . . .
Message 25
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: Flap Control Schematic - will it work? |
Rob
It will not work.
I understand the KIS approach that leads you to use relays/micro switches
only. Unfortunately designing such thing will require some level of
electronic involves and the reason for it is that you need to know *at all
times* what the position of the flaps is because you need to tell the motor
to which direction to go, up/down. Using micro switch as a location sensing
lacks this capability, it =93senses=94 at only one position, the position t
o
which you set it mechanically along the motor travel. The moment the motor
moves from that position you have no indication of where you are. The most
common sense to use as sensing device would be a potentiometer, and then
you need some electronics to sense and compare (comparators). I would even
think basing the design on the LM3914 10 LED driver.
When it was time for me to change the flap system on my RANS 6 from manual
to electric I thought, as an electronic fan about deferent designs but
eventually find myself using this:
http://www.e-motionllc.com/Feedback_actuator_p/fa-po-150-12-2.htm
As the actuator (it has built in potentiometer)
And this as a controller.
http://www.aircraftspruce.com/catalog/elpages/electronicsflapcontroller.php
A little pricy, I know but works, I love every second flying the 6 with
this arrangement
Nati
RANS 6
Illinois
On Sat, Sep 15, 2012 at 6:51 AM, Robert Reed <robertr237@att.net> wrote:
> All,
>
>
> Attached is my plan for a flap control system using a Rotary 4 position
> switch to control the flaps with LED indicators to show the position
> settings. The rotary switch will have a lever that not only gives a
> tactile feel indicating position but will point to the LED. I believe th
is
> setup will work but would like some review. I have also included absolut
e
> limit switched to ensure that an over-run will not occur due to a bad rel
ay.
>
>
> Bob Reed
>
Message 26
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: Fuel Pressure Sensor search |
Interesting. The first is one made by my company.
Dick Tasker
Robert L. Nuckolls, III wrote:
>
> At 06:38 PM 9/14/2012, you wrote:
>>
>> Searching for a low pressure 7.5psi (0.5 bar) fuel (avgas) pressure sensor.
>> Can be either two or three terminal.
>>
>> thanks for leads (brands or unused items), -john-
>
> Finding such a critter with a full scale
> range that small is problematic . . . especially
> one with all metal pressure-side materials
> that would be okay with gasoline.
>
> Suggest you look at something like this
>
> http://tinyurl.com/9uw647y
> http://tinyurl.com/8unuxge
> http://tinyurl.com/983v7o7
> http://tinyurl.com/99xfyrs
>
> This is a small sample of possibilities.
> They're all aerospace grade devices at
> very reasonable prices compared to off the
> shelf new. Even as used devices, transducers
> of this genre' are likely to be a better
> value than automotive devices.
>
>
> Bob . . .
>
>
--
Please Note:
No trees were destroyed in the sending of this message. We do concede, however,
that a significant number of electrons may have been temporarily inconvenienced.
--
Message 27
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: Flap Control Schematic - will it work? |
Nati,=0A=0ASorry, I only showed the electrical and did not explain the mech
anics of the =0Aoperation.=C2- =0A=0A=0AThe micro-switches will be locate
d in a channel with the ability to move them to =0Aadjust the positions.=C2
- A slide bar will be attached to the trim control arm.=C2- =0AThe slid
e bar will close each switch in line during the retract operation and =0Aop
en each in line during the extend.=C2- During the retract operation only
the =0Aretract circuit will be powered by the rotary switch with the intent
of full =0Aretraction and not stepped retraction.=C2- During extension,
only one circuit can =0Abe active at any time and that circuit will close a
s soon as the slide bar =0Apasses the switch allowing it to open.=C2- The
indicator lights will only light =0Awhen the desired circuit is active and
the switch is open.=C2- It should allow for =0Aeither stepped flap exten
sion or full extension with one operation.=0A=0ABob=0A=0A=0A=C2-=0A=0A=0A
=0A________________________________=0AFrom: Nati Niv <n992dn@gmail.com>=0AT
o: aeroelectric-list@matronics.com=0ASent: Fri, September 14, 2012 10:14:26
PM=0ASubject: Re: AeroElectric-List: Flap Control Schematic - will it work
?=0A=0A=0ARob=0A=C2-=0AIt will not work.=0AI understand the KIS approach
that leads you to use relays/micro switches only. =0AUnfortunately designin
g such thing will require some level of electronic =0Ainvolves and the reas
on for it is that you need to know at all times what the =0Aposition of the
flaps is because you need to tell the motor to which direction =0Ato go, u
p/down. Using micro switch as a location sensing lacks this capability, =0A
it =9Csenses=9D at only one position, the position to which you
set it mechanically =0Aalong the motor travel. The moment the motor moves
from that position you have =0Ano indication of where you are. The most com
mon sense to use as sensing device =0Awould be a potentiometer, and then yo
u need some electronics to sense and =0Acompare (comparators). I would even
think basing the design on the LM3914 10 LED =0Adriver. =0A=0AWhen it was
time for me to change the flap system on my RANS 6 from manual to =0Aelectr
ic I thought, as an electronic fan about deferent designs but eventually
=0Afind myself using this:=0A=C2-=0Ahttp://www.e-motionllc.com/Feedback_a
ctuator_p/fa-po-150-12-2.htm=0A=C2-=0AAs the actuator (it has built in po
tentiometer) =0A=C2-=0AAnd this as a controller.=0A=C2-=0Ahttp://www.ai
rcraftspruce.com/catalog/elpages/electronicsflapcontroller.php=0A=C2-=0AA
little pricy, I know but works, I love every second flying the 6 with this
=0Aarrangement=0A=C2-=0ANati=0ARANS 6=0AIllinois =C2-=C2-=0A=C2-
=0A=0A=0AOn Sat, Sep 15, 2012 at 6:51 AM, Robert Reed <robertr237@att.net>
wrote:=0A=0AAll,=0A>=C2-=0A>Attached is my plan for a flap control system
using a Rotary 4 position switch =0A>to control the flaps with LED indicat
ors to show the position settings.=C2- The =0A>rotary switch will have a
lever that not only gives a tactile feel indicating =0A>position but will p
oint to the LED.=C2- I believe this setup will work but would =0A>like so
me review.=C2- I have also included absolute limit switched to ensure tha
t =0A>an over-run will not occur due to a bad relay.=0A>=C2-=0A>Bob Reed
=================== =0A
Message 28
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: Flap Control Schematic - will it work? |
Hummmmm
If thats the case, let me think again...
Nati
On Sat, Sep 15, 2012 at 10:39 AM, Robert Reed <robertr237@att.net> wrote:
> Nati,
>
> Sorry, I only showed the electrical and did not explain the mechanics of
> the operation.
>
> The micro-switches will be located in a channel with the ability to move
> them to adjust the positions. A slide bar will be attached to the trim
> control arm. The slide bar will close each switch in line during the
> retract operation and open each in line during the extend. During the
> retract operation only the retract circuit will be powered by the rotary
> switch with the intent of full retraction and not stepped retraction.
> During extension, only one circuit can be active at any time and that
> circuit will close as soon as the slide bar passes the switch allowing it
> to open. The indicator lights will only light when the desired circuit i
s
> active and the switch is open. It should allow for either stepped flap
> extension or full extension with one operation.
>
> Bob
>
>
> ------------------------------
> *From:* Nati Niv <n992dn@gmail.com>
> *To:* aeroelectric-list@matronics.com
> *Sent:* Fri, September 14, 2012 10:14:26 PM
> *Subject:* Re: AeroElectric-List: Flap Control Schematic - will it work?
>
> Rob
>
>
> It will not work.
>
> I understand the KIS approach that leads you to use relays/micro switches
> only. Unfortunately designing such thing will require some level of
> electronic involves and the reason for it is that you need to know *at
> all times* what the position of the flaps is because you need to tell the
> motor to which direction to go, up/down. Using micro switch as a location
> sensing lacks this capability, it =93senses=94 at only one position, the
> position to which you set it mechanically along the motor travel. The
> moment the motor moves from that position you have no indication of where
> you are. The most common sense to use as sensing device would be a
> potentiometer, and then you need some electronics to sense and compare
> (comparators). I would even think basing the design on the LM3914 10 LED
> driver.
>
> When it was time for me to change the flap system on my RANS 6 from manua
l
> to electric I thought, as an electronic fan about deferent designs but
> eventually find myself using this:
>
>
> http://www.e-motionllc.com/Feedback_actuator_p/fa-po-150-12-2.htm
>
>
> As the actuator (it has built in potentiometer)
>
>
> And this as a controller.
>
>
> http://www.aircraftspruce.com/catalog/elpages/electronicsflapcontroller.p
hp
>
>
> A little pricy, I know but works, I love every second flying the 6 with
> this arrangement
>
>
> Nati
>
> RANS 6
>
> Illinois
>
>
> On Sat, Sep 15, 2012 at 6:51 AM, Robert Reed <robertr237@att.net> wrote:
>
>> All,
>>
>>
>>
>> Attached is my plan for a flap control system using a Rotary 4 position
>> switch to control the flaps with LED indicators to show the position
>> settings. The rotary switch will have a lever that not only gives a
>> tactile feel indicating position but will point to the LED. I believe t
his
>> setup will work but would like some review. I have also included absolu
te
>> limit switched to ensure that an over-run will not occur due to a bad re
lay.
>>
>>
>>
>> Bob Reed
>>
>
> *
>
> om/Navigator?AeroElectric-List" rel=nofollow target=_blank>http://www
.mhref="http://forums.matronics.com/" rel=nofollow target=_blank>http
:/=========
> *
>
> *
>
===========
===========
===========
===========
> *
>
>
Message 29
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: Flap Control Schematic - will it work? |
Bob
Now, that I understand the mechanical design I have a solution including to
the =93moving from any position to any position up/down=94 can you send me
the
diagram in a format other than PDF and I will returned it corrected? Now
that I understand I really the simplicity of it.
Nati
On Sat, Sep 15, 2012 at 10:39 AM, Robert Reed <robertr237@att.net> wrote:
> Nati,
>
> Sorry, I only showed the electrical and did not explain the mechanics of
> the operation.
>
> The micro-switches will be located in a channel with the ability to move
> them to adjust the positions. A slide bar will be attached to the trim
> control arm. The slide bar will close each switch in line during the
> retract operation and open each in line during the extend. During the
> retract operation only the retract circuit will be powered by the rotary
> switch with the intent of full retraction and not stepped retraction.
> During extension, only one circuit can be active at any time and that
> circuit will close as soon as the slide bar passes the switch allowing it
> to open. The indicator lights will only light when the desired circuit i
s
> active and the switch is open. It should allow for either stepped flap
> extension or full extension with one operation.
>
> Bob
>
>
> ------------------------------
> *From:* Nati Niv <n992dn@gmail.com>
> *To:* aeroelectric-list@matronics.com
> *Sent:* Fri, September 14, 2012 10:14:26 PM
> *Subject:* Re: AeroElectric-List: Flap Control Schematic - will it work?
>
> Rob
>
>
> It will not work.
>
> I understand the KIS approach that leads you to use relays/micro switches
> only. Unfortunately designing such thing will require some level of
> electronic involves and the reason for it is that you need to know *at
> all times* what the position of the flaps is because you need to tell the
> motor to which direction to go, up/down. Using micro switch as a location
> sensing lacks this capability, it =93senses=94 at only one position, the
> position to which you set it mechanically along the motor travel. The
> moment the motor moves from that position you have no indication of where
> you are. The most common sense to use as sensing device would be a
> potentiometer, and then you need some electronics to sense and compare
> (comparators). I would even think basing the design on the LM3914 10 LED
> driver.
>
> When it was time for me to change the flap system on my RANS 6 from manua
l
> to electric I thought, as an electronic fan about deferent designs but
> eventually find myself using this:
>
>
> http://www.e-motionllc.com/Feedback_actuator_p/fa-po-150-12-2.htm
>
>
> As the actuator (it has built in potentiometer)
>
>
> And this as a controller.
>
>
> http://www.aircraftspruce.com/catalog/elpages/electronicsflapcontroller.p
hp
>
>
> A little pricy, I know but works, I love every second flying the 6 with
> this arrangement
>
>
> Nati
>
> RANS 6
>
> Illinois
>
>
> On Sat, Sep 15, 2012 at 6:51 AM, Robert Reed <robertr237@att.net> wrote:
>
>> All,
>>
>>
>>
>> Attached is my plan for a flap control system using a Rotary 4 position
>> switch to control the flaps with LED indicators to show the position
>> settings. The rotary switch will have a lever that not only gives a
>> tactile feel indicating position but will point to the LED. I believe t
his
>> setup will work but would like some review. I have also included absolu
te
>> limit switched to ensure that an over-run will not occur due to a bad re
lay.
>>
>>
>>
>> Bob Reed
>>
>
> *
>
> om/Navigator?AeroElectric-List" rel=nofollow target=_blank>http://www
.mhref="http://forums.matronics.com/" rel=nofollow target=_blank>http
:/=========
> *
>
> *
>
===========
===========
===========
===========
> *
>
>
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! --
|