Today's Message Index:
----------------------
1. 12:05 AM - Re: An opportunity too good to miss . . . (Sacha)
2. 12:11 AM - Re: An opportunity too good to miss . . . (Michael Orth)
3. 12:29 AM - An opportunity too good to miss . . . (GLEN MATEJCEK)
4. 03:03 AM - Re: The dreaded downwind turn . . . (Sacha)
5. 03:33 AM - Re: The dreaded downwind turn . . . (Sacha)
6. 04:30 AM - Re: An opportunity too good to miss . . . (R. curtis)
7. 06:15 AM - Re: GNS-650 Installation Manual (Fred Stucklen)
8. 06:22 AM - Re: Ray Allen position sensors (Jeff Page)
9. 07:28 AM - Re: An opportunity too good to miss . . . (Robert L. Nuckolls, III)
10. 08:39 AM - Re: Ray Allen position sensors (Jeff Luckey)
11. 09:17 AM - Charge battery thru Ground Power Jack (jonlaury)
12. 09:41 AM - Re: Ray Allen position sensors (Richard Tasker)
13. 10:04 AM - Re: Multiplexing 7-segment LED displays (bcabebe)
14. 10:18 AM - Re: An opportunity too good to miss . . . (BobsV35B@aol.com)
15. 10:25 AM - Re: An opportunity too good to miss . . . (Ralph Finch)
16. 10:31 AM - Looking for programmable electrical test box (Ralph Finch)
17. 11:24 AM - Re: Looking for programmable electrical test box (Eric M. Jones)
18. 11:33 AM - Re: Looking for programmable electrical test box (Daniel Hooper)
19. 12:07 PM - Re: Looking for programmable electrical test box (Richard Tasker)
20. 04:28 PM - Re: Ray Allen position sensors (user9253)
21. 04:42 PM - Re: De-Slumpifier, Voltage Buffer to Prevent Brownout (user9253)
22. 05:47 PM - Re: Looking for programmable electrical test box (Robert L. Nuckolls, III)
23. 05:53 PM - Re: GNS-650 Installation Manual (Robert L. Nuckolls, III)
24. 05:56 PM - Re: Re: De-Slumpifier, Voltage Buffer to Prevent Brownout (Robert L. Nuckolls, III)
25. 06:54 PM - Re: GNS-650 Installation Manual (Robert L. Nuckolls, III)
26. 06:59 PM - Re: GNS-650 Installation Manual (Robert L. Nuckolls, III)
27. 07:03 PM - Re: GNS-650 Installation Manual (Kelly McMullen)
28. 07:49 PM - Re: De-Slumpifier, Voltage Buffer to Prevent Brownout (user9253)
29. 08:01 PM - Re: Re: De-Slumpifier, Voltage Buffer to Prevent Brownout (Robert L. Nuckolls, III)
30. 08:02 PM - Re: GNS-650 Installation Manual (Robert L. Nuckolls, III)
31. 08:04 PM - B-787 Li-Ion battery story continues (Robert L. Nuckolls, III)
32. 08:49 PM - Re: An opportunity too good to miss . . . (speedy11@aol.com)
33. 08:49 PM - Re: GTN-650 Installation Manual (Kelly McMullen)
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: | An opportunity too good to miss . . . |
>Its amazing that you were not fully employed before this. Looks to me like
Cessna gets the best end of the deal. Good luck to you.
>I have enjoyed your comments and contributions to this list. I have
learned a lot due to you.
I fully agree... thanks again for all you've taught us... I hope you'll
still be around on the list!
Sacha
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: An opportunity too good to miss . . . |
Congratulations, Robert.
Michael Orth
-------------------------------------------------------------------------
-------
-------------------------------------------------------------------------
-------
-----Original Message-----
From: Robert L. Nuckolls, III
Sent: Tuesday, October 8, 2013 5:26 PM
Subject: AeroElectric-List: An opportunity too good to miss . . .
<nuckolls.bob@aeroelectric.com>
It's official. Cessna has made me an offer that
was just too good to go begging - I'll be work
there as a contractor next week for sure, possibly
sooner.
I'll be spending three nights a week in Wichita
away from distractions like workshops, bins
full of parts, and too many tools. This will be
used to get some writing projects under way,
. . . not the least of which is Rev 13 to the
'Connection.
This is kind of exciting. Cessna has continuously
evolved and expanded on capabilities that
Beech and Cessna shared about 25 years ago.
Somewhere along the road, powers at Beech decided
they could purchase that work product. They let
all of their labs and skunk-werks facilities go.
This will be the third time I've worked for Cessna.
The first time was on the 310/320 production line
wiring the nose wheel well. That was 50 years ago!
Worked that job for one week and gave them two
weeks notice . . . I got a short tour of the Cessna
electronics design and development facilities that
really got the juices going!
My daytime activity on the List will be limited Mon-
Thurs but we can make it work.
Bob . . .
-----
No virus found in this message.
Checked by AVG - www.avg.com
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: | An opportunity too good to miss . . . |
Congrats Bob! I'm sorry I don't get to ICT anymore; I still owe you
a trip to Connie's-
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: The dreaded downwind turn . . . |
When he started talking about the wind accelerating the aircraft during
the
turn, he lost me.
As soon as he says "a lighter aircraft will
accelerate faster than a heavier aircraft"
and bases the statement on an analysis of
"square feet of sail" . . . he blew it.
Yes. I went back and tried to figure out what he was *actually*
thinking
when he calculated the sail area necessary to accelerate the plane.
From
the numbers he is using, I figured out that he is calculating the
surface
that a flat 2000lb object would have to present to a 20kt wind to
produce an
acceleration from 100kts to 140kts in 16 seconds:
A wind V will produce a force on the airplane equal to F = (1/2 p
V^2).C.S.
Here the first term in brackets is the dynamic pressure (p is the
density of
air), S is the =9Csail area=9D (the cross-sectional area
presented by the
aircraft perpendicularly to the wind) and C is the drag coefficient.
Since
this force is also equal to m.a (mass times acceleration), we can solve
for
S:
S = 2.m.a / (p.V^2.C)
If we convert everything to compatible units (I=99ve used metric
here) we get
V=10.3m/s, p=1.225 kg/m^3, m = 2000 lb = 909kg and a = 40/16
kts/s = 1.275
m/s^2
Plugging everything and assuming C = 1 gives S = 17.83 m2 or 192 sq
ft of
sail area.
Why is this nonsense? Well, first, C for the profile of an aircraft is
bound to be lower than 1 after all, the reason it flies is that
it has a
somewhat aerodynamic shape!
Let=99s look at the numbers for a normally loaded PA-28 whose
weight is
approx. 2000lb. The wing surface is 160 sqft. But the surface that
the
aircraft would present to the wind during the downwind turn would be
less
than that, probably no more than 50-100 sqft, with a C that probably
varies
from 0.1 to 0.5, depending on the angle the aircraft makes with the
wind.
That already reduces the magnitude of the force applied by the wind by a
factor somewhere between 4 and 20
Put it another way; if C really were 1 and the aircraft presented a
cross-sectional surface of only 50 sqft during normal S&L flight at max
speed (123 kts), then the power necessary to sustain S&L flight would be
P
F . V = =C2=BD p. V^3.C.S, which comes out to about 1000 hp, about 8
times what
an 0-320 engine can deliver.
As Bob correctly states, what does in fact accelerate the plane from 100
kts
GS to 140 kts GS as the aircraft completes the downwind turn is mostly
the
power produced by the engine (in a normal turn), or the tradeoff of
potential energy vs kinetic energy (in a descending gliding turn) and
the
normal aerodynamic forces that the IAS produces on the airfoil...
=C3=98 a 270 degree turn at 45 degrees of bank into the crosswind to
get pointed
back toward the runway.
its=99 actually 180+45=225 degrees back to intersect the runway
and then a 45
degree turn to line up again which means the total required
turning is 270
degs.
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: | The dreaded downwind turn . . . |
Put it another way; if C really were 1 and the aircraft presented a
cross-sectional surface of only 50 sqft during normal S&L flight at max
speed (123 kts), then the power necessary to sustain S&L flight would be
P = F . V = =C2=BD p. V^3.C.S, which comes out to about 1000 hp,
about 8 times what an 0-320 engine can deliver.
Actually my estimate above is an underestimate because some that power
has to go towards producing lift, not just overcoming drag
Sacha
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: An opportunity too good to miss . . . |
> It's official. Cessna has made me an offer that
> was just too good to go begging - I'll be work
> there as a contractor next week for sure, possibly
> sooner.
Bob,
It's about time that a young guy like you quit messing
around and start a career.
Have fun with your new gig. I'm sure you will.
Roger
--
Do you have a slow PC? Try a Free scan http://www.spamfighter.com/SLOW-PCfighter?cid=sigen
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: GNS-650 Installation Manual |
Hi All,
Thanks for the help. This list is GREAT! I now have the manual via the
"Cloud" as the file was so large.
Fred Stucklen
I would be happy to send copy to Bob's on line collection of manuals.
Kelly
kellym at aviating dot com
On 10/8/2013 7:27 PM, Fred Stucklen wrote:
>
> Does anyone have an electronic .PDF file for the GNS-650
GPS/NAV/COMM
> ?? I'm trying to help a friend setup his panel and need to know more
> about the setup parameters.
>
> Fred Stucklen
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: Ray Allen position sensors |
Jeff,
The most likely place for an aileron or elevator connection is to the
bellcrank in the wing (aileron) and under the cabin floor (elevator).
So the end of the rod connected to the bellcrank will swing an arc and
the other end of the rod would connect to the sensor. The Ray Allen
sensor might work, but only if it doesn't mind the slightly off axis
forces and the continuous motion (higher wear rate than a trim or flap
indicator).
If the Ray Allen is unsuitable, than another potentiometer device
would work, since the Dynon has analog 0-5V inputs. That open
possibilities of automotive throttle position sensors etc., but most
will likely be harder to mount and connect a rod to.
Joe Gores hall effect device has possibilities I will need to look
into (Thanks Joe !), although it looks like I might need to find a way
to temperature compensate it.
Jeff Page
Dream Aircraft Tundra #10
> From: Jeff Luckey <jluckey@pacbell.net>
> Subject: Re: AeroElectric-List: Ray Allen position sensors
>
> Jeff,
>
> 2 devices pop immediately to mind: a potentiometer (pot) or rotary encoder
> (like the TPS uses).
> But first a few questions. Where do you want to mount the sensor ? -somewhere
> near the aileron -near the bell crank -near aileron axis of the stick ??
> What type of input does the Dynon have for this purpose ? - Is it
> expecting an
> analog voltage or a string of bits?
> With a pot, it is trivial to deliver an analog voltage proportional
> to surface
> deflection. - With a rotary encoder you will need some circuitry. As far as
> connecting linkages & arms, you might look into RC model aircraft hardware.
> There are all kinds of arms, clevises, ball links, etc that could do the job
> See these links for starters:
> http://www.servocity.com/html/servo_power_gearbox_arms.html
> http://www3.towerhobbies.com/cgi-bin/wti0095p?FVPROFIL=&FVSEARCH=aluminum+servo+arms&search=Go
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: An opportunity too good to miss . . . |
At 09:14 PM 10/8/2013, you wrote:
>
>So, tell more!! Anything interesting on the horizon that you can share?
>
>Congrats on the job, and my condolences on having to spend time away
>from family and friends. Hope you are as productive as you plan to be.
>
I'm thinking that this change in direction
may be relatively transparent to my activities
here on the List . . . I won't be checking much
during time walled-off for Cessna but I don't
expect to change the over-all level of participation.
Many have expressed concerns that other activities
might have to be placed on the back burner because
of new taxations on my time . . .
Actually, this opportunity may accelerate
those activities because I'll have discretionary
cash that opens more options for how my time is
used as opposed to hiring the time others. It will
also relieve the bottlenecks for new product development
in want of seed money.
I've been taking the free, Hillsdale online courses in
history and economics. I was thinking last night about
how this change in direction for my personal behaviors
will have a ripple effect that extends far beyond those
things that occupy my own waking hours.
I highly recommend these courses to any with curiosity
and a need to better understand how 'spontaneous order'
can emerge from what appears chaotic.
So 'bon voyage' flowers are not necessary . . . you're
not going to get rid of me that easy! But thank you
all for your encouraging words.
Bob . . .
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: Ray Allen position sensors |
Well, that makes it easy -- a 5-volt regulator, 10k pot driven from the bel
l crank & you're in business...=0A=0A=0A=0A=0A_____________________________
___=0A From: Jeff Page <jpx@qenesis.com>=0ATo: aeroelectric-list@matronics.
com =0ASent: Wednesday, October 9, 2013 6:22 AM=0ASubject: Re: AeroElectric
-List: Ray Allen position sensors=0A =0A=0A--> AeroElectric-List message po
sted by: Jeff Page <jpx@qenesis.com>=0A=0A=0AJeff,=0A=0AThe most likely pla
ce for an aileron or elevator connection is to the bellcrank in the wing (a
ileron) and under the cabin floor (elevator).- So the end of the rod conn
ected to the bellcrank will swing an arc and the other end of the rod would
connect to the sensor.- The Ray Allen sensor might work, but only if it
doesn't mind the slightly off axis forces and the continuous motion (higher
wear rate than a trim or flap indicator).=0A=0AIf the Ray Allen is unsuita
ble, than another potentiometer device would work, since the Dynon has anal
og 0-5V inputs.- That open possibilities of automotive throttle position
sensors etc., but most will likely be harder to mount and connect a rod to.
=0A=0AJoe Gores hall effect device has possibilities I will need to look in
to (Thanks Joe !), although it looks like I might need to find a way to tem
perature compensate it.=0A=0AJeff Page=0ADream Aircraft Tundra #10=0A=0A=0A
=0A> From: Jeff Luckey <jluckey@pacbell.net>=0A> Subject: Re: AeroElectric-
List: Ray Allen position sensors=0A> =0A> Jeff,=0A> =0A> 2 devices pop imme
diately to mind: a potentiometer (pot) or rotary encoder=0A> (like the TPS
uses).=0A> But first a few questions. Where do you want to mount the sensor
? -somewhere=0A> near the aileron -near the bell crank -near aileron axis
of the stick ??=0A> What type of input does the Dynon have for this purpose
? - Is it expecting an=0A> analog voltage or a string of bits?=0A> With a
pot, it is trivial to deliver an analog voltage proportional to surface=0A>
- deflection. - With a rotary encoder you will need some circuitry. As fa
r as=0A> connecting linkages & arms, you might look into RC model aircraft
hardware.=0A> There are all kinds of arms, clevises, ball links, etc that c
ould do the job=0A> See these links for starters:=0A> http://www.servocity.
com/html/servo_power_gearbox_arms.html=0A> http://www3.towerhobbies.com/cgi
-bin/wti0095p?FVPROFIL=&FVSEARCH=aluminum+servo+arms&search=Go=0A=0A
=========================0A
===================
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: | Charge battery thru Ground Power Jack |
One of the reasons I installed a GPJ was that I thought that I would be able to
hook up my battery maintainer through it.
But when the Schumacher XC-10 is connected, there's not sufficient power to light
the GP indicator lamp or close the GPG contactor.
How do I make this happen?
Thanks,
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410145#410145
Attachments:
http://forums.matronics.com//files/z8_20td_final_191.pdf
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: Ray Allen position sensors |
I am not sure about the Ray Allen position sensors, but if you do use a pot, make
sure it is one designed to be used in
such an application where it will be almost continuously adjusted. All pots have
a projected life before they start
acting flaky (technical term ;-) ). Some are designed to be continuously adjusted,
others are intended to be used only
occasionally.
While what you are contemplating is not a safety of flight issue, at least how
I interpret what you want to do, it would
be a pain if you had to replace the pot every few months because it wore out and
responded erratically.
Dick Tasker
Jeff Luckey wrote:
> Well, that makes it easy -- a 5-volt regulator, 10k pot driven from the bell
crank & you're in business...
>
>
> ------------------------------------------------------------------------------------------------------------------------
> *From:* Jeff Page <jpx@qenesis.com>
> *To:* aeroelectric-list@matronics.com
> *Sent:* Wednesday, October 9, 2013 6:22 AM
> *Subject:* Re: AeroElectric-List: Ray Allen position sensors
>
>
>
> Jeff,
>
> The most likely place for an aileron or elevator connection is to the bellcrank
in the wing (aileron) and under the
> cabin floor (elevator). So the end of the rod connected to the bellcrank will
swing an arc and the other end of the
> rod would connect to the sensor. The Ray Allen sensor might work, but only if
it doesn't mind the slightly off axis
> forces and the continuous motion (higher wear rate than a trim or flap indicator).
>
> If the Ray Allen is unsuitable, than another potentiometer device would work,
since the Dynon has analog 0-5V inputs.
> That open possibilities of automotive throttle position sensors etc., but most
will likely be harder to mount and
> connect a rod to.
>
> Joe Gores hall effect device has possibilities I will need to look into (Thanks
Joe !), although it looks like I might
> need to find a way to temperature compensate it.
>
> Jeff Page
> Dream Aircraft Tundra #10
>
>
> > From: Jeff Luckey <jluckey@pacbell.net <mailto:jluckey@pacbell.net>>
> > Subject: Re: AeroElectric-List: Ray Allen position sensors
> >
> > Jeff,
> >
> > 2 devices pop immediately to mind: a potentiometer (pot) or rotary encoder
> > (like the TPS uses).
> > But first a few questions. Where do you want to mount the sensor ? -somewhere
> > near the aileron -near the bell crank -near aileron axis of the stick ??
> > What type of input does the Dynon have for this purpose ? - Is it expecting
an
> > analog voltage or a string of bits?
> > With a pot, it is trivial to deliver an analog voltage proportional to surface
> > deflection. - With a rotary encoder you will need some circuitry. As far as
> > connecting linkages & arms, you might look into RC model aircraft hardware.
> > There are all kinds of arms, clevises, ball links, etc that could do the job
> > See these links for starters:
> > http://www.servocity.com/html/servo_power_gearbox_arms.html
> > http://www3.towerhobbies.com/cgi-bin/wti0095p?FVPROFIL=&FVSEARCH=aluminum+servo+arms&am; sp;
> -===============
>
>
> *
>
>
> *
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: Multiplexing 7-segment LED displays |
james(at)etravel.org wrote:
> Instead of running dozens of IO lines, I'd like to multiplex the displays so
that the total number of lines is 7 + (no. of digits).
We use PIC's and 7-segment LED's in products, so I can give you one way to do it.
I can't give you the actual schematic we use, but I can describe the circuity
and logic.
By the use of five logic chips, we run four digits with 6 control lines. The logic
IC's we use are:
74HC595 - 8-bit serial in, parallel out shift register with output latches. One
for each 7-segment LED.
74HC238 - 3 to 8 line decoder non-inverting. Qty. 1.
Logic connections:
Connect outputs from a `595 to the inputs on a 7-segment LED.
Tie all serial data input pins on the `595's together and connect to a pin on the
PIC. We'll call this the "Data" line.
Tie all shift register clock input pins from the `595's together and connect to
a pin on the PIC. We'll call this the "Clock" line.
Connect each storage register clock input from each `595 to a different Yx output
on the `238. Connect A0 - A2 input pins from the `238 to the PIC. We'll call
these the "Address" lines.
Connect one enable input from the `238 to PIC. We'll call this the "Latch" line.
Connect the other enable inputs to their active level, either high or low.
Usage:
The general idea is to clock in the desired segment settings using the "Clock"
and "Data" lines. Then select which digit it applies to with the "Address" lines.
Finally, latch the settings to the digit by pulsing the "Latch" line.
In detail ...
Set "Latch" line to inactive state. This keeps all `595's from latching the following
data to their outputs, indirectly, by putting the outputs of the `238
into their inactive state.
Bit bang the desired segment settings using the "Clock" and "Data" lines. Note
that the data will go to all the `595's in parallel, but won't appear on the
any digit until you latch the data to the outputs of one of the `595's.
Select the desired digit with the "Address" lines. Note we could run up to eight
digits with the same number of control lines. If we only wanted to run three
digits, we could eliminate the use of the `238 (and one control line) by connecting
the `595 storage register clock inputs directly to the PIC.
Push the segment settings to the desired digit by pulsing the "Latch" line active
momentarily. This decodes the "Address" lines and makes only one of the outputs
of the `238 active, thereby latching data on only one of the `595's.
Repeat the sequence three more times for the other three digits.
You can run the control lines pretty fast, in the MHz. You can update all four
digits so they appear to all change at once. Using this circuitry and method,
the PIC doesn't have to periodically refresh the digits, it's a set and forget
control method.
There are connections on the `595 that I didn't explain how to use, I thought their
use was straightforward.
Best Regards,
Brian
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410148#410148
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: An opportunity too good to miss . . . |
Good Morning 'lectric Bob,
During the time you were associated with the Beech Aircraft Company, I felt
you not only kept us all up to date on owner built stuff, but we benefited
from knowledge gained via your work at BAC.
Glad to see you are working and I am sure that fact will benefit us all.
Your long time admirer,
Happy Skies,
Old Bob
Do Not Archive
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 |
|
| Subject: | Re: An opportunity too good to miss . . . |
Well, my opinion of Cessna went up several levels. Congratulations Bob, we
all know Cessna will benefit, and it sounds very good for you too.
Ralph Finch
On Wed, Oct 9, 2013 at 7:27 AM, Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> nuckolls.bob@aeroelectric.com**>
>
> At 09:14 PM 10/8/2013, you wrote:
>
>>
>> So, tell more!! Anything interesting on the horizon that you can share?
>>
>> Congrats on the job, and my condolences on having to spend time away from
>> family and friends. Hope you are as productive as you plan to be.
>>
>>
> I'm thinking that this change in direction
> may be relatively transparent to my activities
> here on the List . . . I won't be checking much
> during time walled-off for Cessna but I don't
> expect to change the over-all level of participation.
>
> Many have expressed concerns that other activities
> might have to be placed on the back burner because
> of new taxations on my time . . .
>
> Actually, this opportunity may accelerate
> those activities because I'll have discretionary
> cash that opens more options for how my time is
> used as opposed to hiring the time others. It will
> also relieve the bottlenecks for new product development
> in want of seed money.
>
> I've been taking the free, Hillsdale online courses in
> history and economics. I was thinking last night about
> how this change in direction for my personal behaviors
> will have a ripple effect that extends far beyond those
> things that occupy my own waking hours.
>
> I highly recommend these courses to any with curiosity
> and a need to better understand how 'spontaneous order'
> can emerge from what appears chaotic.
>
> So 'bon voyage' flowers are not necessary . . . you're
> not going to get rid of me that easy! But thank you
> all for your encouraging words.
>
>
> 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: | Looking for programmable electrical test box |
I don't know what to call it, but I'm looking for a programmable electrical
test box: a gizmo that I can program to apply a certain voltage or
resistance or current to its connections, that I can program to vary the V,
I, or R as a function of time or measured electrical parameter. So for
instance I want to apply a draining current to a battery load, such that
the draining current is constant (the gizmo will vary the resistance
applied to achieve the constant current). The gizmo should record time, V,
I, and R so I can download them via bluetooth or USB flash drive.
Does such a gizmo exist?
Ralph Finch
Davis, CA
RV-9A build
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: | Re: Looking for programmable electrical test box |
You are looking for a programmable load with extras. Plus a smart ten-year old.
You might start here: http://www.amazon.com/Tekpower-TP3710A-Programmable-Electronic-Watts/dp/B008NBGOM6
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410153#410153
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: | Re: Looking for programmable electrical test box |
You're looking for an electronic load that has a computer connection for log
ging and control. Hope you're feeling spendy!
The B&K Precision 8540 is an example of something that might work for you. I
have never used one though, so don't take that as a product recommendation.
.
The number of watts you need will determine the model and price.
I would suggest that you consider using constant power mode if you're simula
ting avionics loads, or other devices with built in power supplies like LED o
r HID landing lights. Those devices typically consume a set amount of power a
nd will pull more current as the voltage sags.
--Daniel
On Oct 9, 2013, at 12:30 PM, Ralph Finch <ralphmariafinch@gmail.com> wrote:
> I don't know what to call it, but I'm looking for a programmable electrica
l test box: a gizmo that I can program to apply a certain voltage or resista
nce or current to its connections, that I can program to vary the V, I, or R
as a function of time or measured electrical parameter. So for instance I w
ant to apply a draining current to a battery load, such that the draining cu
rrent is constant (the gizmo will vary the resistance applied to achieve the
constant current). The gizmo should record time, V, I, and R so I can downl
oad them via bluetooth or USB flash drive.
>
> Does such a gizmo exist?
>
> Ralph Finch
> Davis, CA
> RV-9A build
>
>
==========================
=========
==========================
=========
==========================
=========
==========================
=========
>
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: Looking for programmable electrical test box |
Not exactly what you want to test, but this might do what you want:
http://www.westmountainradio.com/product_info.php?products_id=cba4
The previous revision has been mentioned on this forum before. I have one and
it definitely works as advertized.
Dick Tasker
Daniel Hooper wrote:
> You're looking for an electronic load that has a computer connection for logging
and control. Hope you're feeling spendy!
>
> The B&K Precision 8540 is an example of something that might work for you. I
have never used one though, so don't take
> that as a product recommendation..
>
> The number of watts you need will determine the model and price.
>
> I would suggest that you consider using constant power mode if you're simulating
avionics loads, or other devices with
> built in power supplies like LED or HID landing lights. Those devices typically
consume a set amount of power and will
> pull more current as the voltage sags.
>
> --Daniel
>
> On Oct 9, 2013, at 12:30 PM, Ralph Finch <ralphmariafinch@gmail.com <mailto:ralphmariafinch@gmail.com>> wrote:
>
>> I don't know what to call it, but I'm looking for a programmable electrical
test box: a gizmo that I can program to
>> apply a certain voltage or resistance or current to its connections, that I
can program to vary the V, I, or R as a
>> function of time or measured electrical parameter. So for instance I want to
apply a draining current to a battery
>> load, such that the draining current is constant (the gizmo will vary the resistance
applied to achieve the constant
>> current). The gizmo should record time, V, I, and R so I can download them via
bluetooth or USB flash drive.
>>
>> Does such a gizmo exist?
>>
>> Ralph Finch
>> Davis, CA
>> RV-9A build
>> *
>>
>> ==================================
>> st">http://www.matronics.com/Navigator?AeroElectric-List
>> ==================================
>> cs.com
>> ==================================
>> matronics.com/contribution
>> ==================================
>>
>> *
> *
>
>
> *
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: | Re: Ray Allen position sensors |
The Ray Allen pot can be mounted with a hinge. Then there will be no sideways
force.
I bought one of those hall effect sensors to play with. One end of a magnet
will make the output voltage go up. The other end of the magnet will make the
output voltage go down. I think that a horseshoe magnet will give the largest
output range as the magnet moves. The magnet will have to be located near the
control pivot point because it only needs to move a fraction of an inch.
Another possibility is to use hall effect switches or magnetic reed switches.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410168#410168
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: De-Slumpifier, Voltage Buffer to Prevent Brownout |
I went flying yesterday. Before starting the engine, I turned on all electrical
loads. After the Dynon D-180 booted up, I checked the fuel pressure from the
electric fuel pump. Total full-load master-switch on time was not more than
a minute or two. During engine start, the Dynon D-180 rebooted. I gave airplane
rides that required 4 more engine starts that day. The DeSlumpifier prevented
Dynon reboots on those 4 starts. It seems that the battery must be fully
charged for the DeSlumpifier to work. I conclude that the DeSlumpifier works
most of the time, but not always, depending on battery charge.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410169#410169
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: Looking for programmable electrical test box |
At 12:30 PM 10/9/2013, you wrote:
>I don't know what to call it, but I'm looking for a programmable
>electrical test box: a gizmo that I can program to apply a certain
>voltage or resistance or current to its connections, that I can
>program to vary the V, I, or R as a function of time or measured
>electrical parameter. So for instance I want to apply a draining
>current to a battery load, such that the draining current is
>constant (the gizmo will vary the resistance applied to achieve the
>constant current). The gizmo should record time, V, I, and R so I
>can download them via bluetooth or USB flash drive.
>
>Does such a gizmo exist?
Yup. Really nice ones too . . . with prices to match.
I've used a variety of commercial load banks and have
built several more. Your choice of options is probably
budget driven so I'll suggest the po' boy's appraoch.
The last programmable load I built (or almost built)
looked like this
Emacs!
It was a bank of 200W, 5 ohm resistors in a cabinet
with a really good fan on the back. Switches on the
front would allow me turn any one load ON, OFF, or
transfer it to a power FET that was controlled out
of a computer.
The one shown above was intended to perturb the bus
on a Horizon with pulses of various duty cycles and
amplitudes up to 40A.
This one didn't get finished because they (Beech)
abandoned the program before I got it done. But the
approach is simple. Let us suppose you want 1/2 amp
resolution at 14V. The smallest resistor in your
string would be 25 ohms. The next step is 12.5 (two
25's in parallel), the third step is 6.2 (three 20
in parallel), fourth is 3 ohms, 5th 1.5 ohms, 6th,
7th and 8th steps are .75 ohms each.
Each resistor is controlled by power N-Fet that
pulls the free end the resistor to ground. Depending
on the 8-bit word written a discrete output port,
you can command any combination of loads from about
1/2 amp to 76 amps in 1/2 amp steps.
You monitor actual current via a op-amp looking at
a shunt and diving an a/d converter. Same A/d converer
can watch voltage across the load so that you can do
either constant power or constant current operation.
A relatively simple program in Basic, C, Pascal or
even Forth can be crafted to wiggle gates on the FET
array to keep driving toward the target test value.
The last time I did this, I used Weeder Technologies
modules on the serial port of a laptop running a Basic
program. This rather pedestrian setup did a calculation/
correction cycle about 30 times a second.
You can do a Rube Goldberg lash-up in a metal box (cheap
toolbox from a garage sale using techniques that will
hang together long enough for a few tests. If you're
looking for something more robust, then a cabinet, fan,
and electronic similar to that shown in the picture
could be assembled with probably 1/2 again more$
and twice the labor.
If you elect to go this route, I can probably dig
up the BASIC software and maybe even the schematic.
Bob . . .
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: GNS-650 Installation Manual |
At 08:14 AM 10/9/2013, you wrote:
>Hi All,
>
> Thanks for the help. This list is GREAT! I now have the manual
> via the "Cloud" as the file was so large.
>
>Fred Stucklen
>
>I would be happy to send copy to Bob's on line collection of manuals.
I've downloaded the manual . . .
A review of Garmin materials on the website revealed
some degree of disorganization and duplication. I've
gathered the documents together, renamed to a uniform
convention. It took 90 minutes to put the new data
package up on the server . . . that's a boat-load
of bytes.
I've started the bundle upload . . . it takes about
30 minutes. I'll post a note when the 'new and improved'
Garmin package is available.
Bob . . .
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: De-Slumpifier, Voltage Buffer to Prevent |
Brownout
At 06:42 PM 10/9/2013, you wrote:
>
>I went flying yesterday. Before starting the engine, I turned on
>all electrical loads. After the Dynon D-180 booted up, I checked
>the fuel pressure from the electric fuel pump. Total full-load
>master-switch on time was not more than a minute or two. During
>engine start, the Dynon D-180 rebooted. I gave airplane rides that
>required 4 more engine starts that day. The DeSlumpifier prevented
>Dynon reboots on those 4 starts. It seems that the battery must be
>fully charged for the DeSlumpifier to work. I conclude that the
>DeSlumpifier works most of the time, but not always, depending on
>battery charge.
>Joe
If you put your voltmeter on a battery that
the true 'open circuit' voltage of a battery
cannon be read until it has sat unloaded for
hours. For a good battery at 100% charge, this
will be on the order of 12.8 to 13.0 volts.
Open circuit voltage within minutes of having
been connected to a 14.6v bus will be higher.
It's the higher resting voltage that puts
just enough 'snort' on the capacitor to
stand off a re-boot event.
Here's a thought. A 'tiny' DC/DC up-converter
like the one you sent me could be used to charge
the capacitors to the higher value. From
a practical perspective, you've got all the time
in the world to charge the capacitor in anticipation
of supporting a brownout transient.
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: GNS-650 Installation Manual |
At 09:45 PM 10/8/2013, you wrote:
>
>I would be happy to send copy to Bob's on line collection of manuals.
>Kelly
Kelly, the link you sent got me a manual on the GTN600/700 series
devices. Was this an error on Fred's part? Is there such a thing
as a GNS-650?
Bob . . .
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: GNS-650 Installation Manual |
> I've started the bundle upload . . . it takes about
> 30 minutes. I'll post a note when the 'new and improved'
> Garmin package is available.
The Garmin data I've collected to date is
available here.
http://tinyurl.com/khk3hcv
. . . I just noticed that the nice download
that Kelly shared with me was for some GTN
series systems, NOT GNS.
I'm not seeing any mention of a GNS650 on
the 'net. Were we talking about a GTN650
instead?
Bob . . .
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: GNS-650 Installation Manual |
The product is GTN650 and 750, and variants that delete com and or vor
receivers.
The GNS products were previous generation models.
Kelly
On 10/9/2013 6:54 PM, Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>
> At 09:45 PM 10/8/2013, you wrote:
>> <kellym@aviating.com>
>>
>> I would be happy to send copy to Bob's on line collection of manuals.
>> Kelly
>
> Kelly, the link you sent got me a manual on the GTN600/700 series
> devices. Was this an error on Fred's part? Is there such a thing
> as a GNS-650?
>
>
> Bob . . .
>
>
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: De-Slumpifier, Voltage Buffer to Prevent Brownout |
> Here's a thought. A 'tiny' DC/DC up-converter
> like the one you sent me could be used to charge
> the capacitors to the higher value.
The P6KE18CA voltage transient suppressor in the DeSlumpifier has an operating
voltage of about 15 volts. The super capacitors are rated at 5 volts each, total
of 20 volts for 4 in series. So the DeSlumpifier could be powered by up to
15 volts without a problem.
There is also the FMEA consideration, more parts to fail.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410182#410182
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: De-Slumpifier, Voltage Buffer to Prevent |
Brownout
At 09:48 PM 10/9/2013, you wrote:
>
>
> > Here's a thought. A 'tiny' DC/DC up-converter
> > like the one you sent me could be used to charge
> > the capacitors to the higher value.
>
>The P6KE18CA voltage transient suppressor in the DeSlumpifier has an
>operating voltage of about 15 volts. The super capacitors are rated
>at 5 volts each, total of 20 volts for 4 in series. So the
>DeSlumpifier could be powered by up to 15 volts without a problem.
>There is also the FMEA consideration, more parts to fail.
>Joe
Yup, . . . so it may be that having a dc/dc converter
sized to the task is a lower parts count and probably
lower cost than trying to store the transient support
energy on capacitors alone.
Garmin could have foreseen this and designed their
inboard supply to accommodate the real-world of
vehicular DC power systems.
Bob . . .
Message 30
| 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: GNS-650 Installation Manual |
At 09:02 PM 10/9/2013, you wrote:
>
>The product is GTN650 and 750, and variants that delete com and or
>vor receivers.
>The GNS products were previous generation models.
Aha! Thanks. So the GTN series manual is likely
to address Fred's needs?
Bob . . .
Message 31
| 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: | B-787 Li-Ion battery story continues |
I've published a compendium of articles on the B787
battery story at:
http://tinyurl.com/ag2e9xk
but in particular, there's a recent addition that
adds a lot of useful information
http://tinyurl.com/lyc5845
Bob . . .
Message 32
| 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: An opportunity too good to miss . . . |
Congrats, Bob.
Cessna got the best end of that deal!
Stan Sutterfield
Time: 05:27:47 PM PST US
From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
Subject: AeroElectric-List: An opportunity too good to miss . . .
It's official. Cessna has made me an offer that
was just too good to go begging - I'll be work
there as a contractor next week for sure, possibly
sooner.
I'll be spending three nights a week in Wichita
away from distractions like workshops, bins
full of parts, and too many tools. This will be
used to get some writing projects under way,
. . . not the least of which is Rev 13 to the
'Connection.
This is kind of exciting. Cessna has continuously
evolved and expanded on capabilities that
Beech and Cessna shared about 25 years ago.
Somewhere along the road, powers at Beech decided
they could purchase that work product. They let
all of their labs and skunk-werks facilities go.
This will be the third time I've worked for Cessna.
The first time was on the 310/320 production line
wiring the nose wheel well. That was 50 years ago!
Worked that job for one week and gave them two
weeks notice . . . I got a short tour of the Cessna
electronics design and development facilities that
really got the juices going!
My daytime activity on the List will be limited Mon-
Thurs but we can make it work.
Bob . . .
Message 33
| 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: GTN-650 Installation Manual |
Yes
On 10/9/2013 8:01 PM, Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>
> At 09:02 PM 10/9/2013, you wrote:
>> <kellym@aviating.com>
>>
>> The product is GTN650 and 750, and variants that delete com and or
>> vor receivers.
>> The GNS products were previous generation models.
>
> Aha! Thanks. So the GTN series manual is likely
> to address Fred's needs?
>
>
> Bob . . .
>
>
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! --
|