Today's Message Index:
----------------------
1. 06:15 AM - Re: Instrument light dimming (Eric M. Jones)
2. 06:42 AM - Re: Weight savings (echristley@nc.rr.com)
3. 06:48 AM - Re: Alarm System (Eric M. Jones)
4. 07:22 AM - Re: Weight savings (BobsV35B@aol.com)
5. 08:19 AM - Re: Alarm System (Troy Scott)
6. 09:36 AM - Re: Weight savings (echristley@nc.rr.com)
7. 09:53 AM - Re: Re: Instrument light dimming (Brian Lloyd)
8. 10:12 AM - Making FM Antenna (N27160@aol.com)
9. 10:55 AM - Re: Weight Savings OFF TOPIC (Eric M. Jones)
10. 11:20 AM - Re: Alarm System (Chuck Jensen)
11. 11:31 AM - Re: Making FM Antenna (SportAV8R@aol.com)
12. 12:03 PM - Re: Re: Weight Savings OFF TOPIC (Brian Lloyd)
13. 12:13 PM - Re: Alarm System (Brian Lloyd)
14. 01:19 PM - Re: Re: Alarm System (echristley@nc.rr.com)
15. 01:48 PM - Re: Alarm System (Bruce Gray)
16. 02:33 PM - Re: Re: Weight Savings OFF TOPIC (BobsV35B@aol.com)
17. 02:36 PM - Re: Re: Weight Savings OFF TOPIC (BobsV35B@aol.com)
18. 02:40 PM - Re: Instrument light dimming (James Redmon)
19. 03:08 PM - Re: Instrument light dimming (James Redmon)
20. 03:08 PM - Re: Re: Alarm System (jerb)
21. 03:57 PM - B-8 stickgrip switches (Jim Stone)
22. 04:40 PM - Re: Re: Alarm System (echristley@nc.rr.com)
23. 05:31 PM - Re: Alarm System (Mike Heinen)
24. 06:32 PM - Re: B-8 stickgrip switches (Ron Koyich)
Message 1
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| Subject: | Re: Instrument light dimming |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com>
>> The EL strips with inverter I have dim just fine with reductions in
>> voltage. I suspect the problem is that incandescent lights dim rather
>> nonlinearly and go to essentially invisibility well above zero volts,
>> while the EL strips are more linear - leaving them with a significant
>> light output when the incandescents have dimmed to nothing.
>>
>> I don't have a really good simple solution other than using two dimmers
>> - one for the incandescents and one for the EL strips.
>This sounds like a job for a cheap micrprocessor like a PIC with a couple
of D:A
>converters. You can program the D:A converters to drive a power op-amp
that
>drives the various lights. You can then tailor the transfer curve any way
you
>want.......Brian Lloyd
Brian: That's why you can afford to live in St. Thomas.
--> AeroElectric-List message posted by: John Schroeder
<jschroeder@perigee.net>
>> The easy way is probably to put a resistor in series with one of the
>> leads and see what happens. This should lead to a solution. A capacitor
>> in series would work too but is harder to make variable.
>>Eric -
>You recommend a resistor inserted in one of the leads. Since you did nor
>specify which one I assume that it is in either lead from the inverter to
>the lamp. If this is not the case, it would go in the power (+) lead from
>the dimmer to the inverter. Am I correct, or demonstrating some ignorance
>about the effect of resistance in an AC circuit?.......John
Sorry I was not more clear. Yes the resistor (or capacitor) must go
in series with one of the inverter output leads to the EL strip. If you
tried to dim the inverter itself by reducing the voltage to the inverter
module, The inverter could burn up or just not work until the voltage got to
the Vmin needed to start the little oscillator.
In the very near future EL systems will disappear to be replaced by Organic
LEDs (sheet and strip) --much brighter, more efficient, longer lasting,
better colors--even white, simple to dim, cheaper and no inverter. One big
advantage is that EL is AC by nature. OLEDs are DC by nature. Thus OLEDs
and LEDs have no stroboscopic problems from vibration or motion.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
Message 2
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| Subject: | Re: Weight savings |
--> AeroElectric-List message posted by: echristley@nc.rr.com
----- Original Message -----
From: BobsV35B@aol.com
Subject: Re: AeroElectric-List: Weight savings
> --> AeroElectric-List message posted by:
BobsV35B@aol.com
>
>
> Good Evening echristle,
>
> There is reasonable justification for using
payload in
> lieu of useful load. How would the numbers look if
> you did that?
>
> Happy Skies,
>
> Old Bob
Hmmm? I don't know? How do you seperate payload
from useful load. I'm assuming that you're talking
about this game manufacturers play to try and make
their empty weight look as small as possible. I see
those games as nothing but marketing hype.
Firtst off, I don't understand the argument that oil
and (in my case) coolant shouldn't be part of the
plane's empty weight, because supposedly it can be
left on the ground. There may be engines that run
without oil, but if I'm to the point of draining oil
to get someplace, it's time to pull out the car
keys. My plane will have an oily dipstick or stay
on the ground. For me oil and engine coolant are
part of the empty weight.
Fuel can't be considered part of the empty weight,
except for that part that you just don't feel
comfortable taking off without. I believe it was
Deakins over on Avweb that argued that GA pilots
waste money hauling around fuel that they don't
need. That we should do better calculations, and
only carry what is necessary for the flight. My
response to that is that I have a day job that keeps
me on the ground more than I like, so I don't get to
practice my fuel calculations 8hrs/day. If I ever
get a job as an air carrier, I'll spend more time
trying to be efficient, but until then I'll pay
attention to the NTSB reports. It's my
understanding that the leading cause of GA accidents
is running out of gas. I see no reason to ever
takeoff without at least a half tank (I only have
one 42gal tank). So I'd put half of the tank in the
empty weight category.
The difference between the empty weight (with its
coolant, oil and fuel) and the gross weight (how
much weight I can put on the tires in the hanger),
is my useful load. Call it payload or whatever,
it's the weight budget I have to work with to get
stuff from point A to point B.
When paying for weight reduction, I'm simply paying
to increase that budget and that's the concept I
used in my calculations.
Message 3
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| Subject: | RE: Alarm System |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
--> AeroElectric-List message posted by: BTomm <fvalarm@rapidnet.net>
>Someone makes a smoke system for use with alarm systems which produces very
>dense theatrical smoke on demand to cloak the area.
>Bevan
Hey I love that, Bevan...how about some theatrical flames to go with the
smoke?
There is a US patent for a device to disable hijackers or unruly passengers.
It uses knock-out syringes in the seat cushions. There are certainly others.
While my C172 was in Mexico, the plane was broken into and camping supplies
were stolen. No damage to the aircraft. The police said, "American thieves
take vacations here too." And I believe him. A couple days later we landed
in Huatabampo, Sonora, Mexico. An old lady with a shotgun and her four very
efficient large black dogs guarded the field all night... No venga por
favor aqu en
la noche! That works!
When you add up the cost of increased insurance premiums and the cost to
society if the plane gets stolen by terrorists or drug runners, employing
guards and dogs seems a simple and cost-effective approach.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
Message 4
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| Subject: | Re: Weight savings |
--> AeroElectric-List message posted by: BobsV35B@aol.com
In a message dated 5/19/04 8:43:39 AM Central Daylight Time,
echristley@nc.rr.com writes:
Hmmm? I don't know? How do you seperate payload
from useful load. I'm assuming that you're talking
about this game manufacturers play to try and make
their empty weight look as small as possible. I see
those games as nothing but marketing hype.
Good Morning echristley,
Payload is that weight that is being carried for a purpose which makes money,
thus PAY load.
Obviously, the definition of payload and useful load is dependent on the
mission and is very subjective.
If you are doing sling loads with a helicopter, you will likely work with a
fuel load that allows only minutes of flight. It is not unusual to add a a
couple of gallons of fuel between each trip dropping an air conditioning unit on
top of a building. The payload is the air conditioner. The pilot and the fuel
is part of the useful load, but not part of the payload.
That is why the calculations are so difficult, you first must come to an
agreement as to just what IS payload.
I agree totally with John Deakin. My airplane carries one hundred and ten
gallons in four tanks. I very rarely take off with full fuel. I adjust my
loads to adapt to the payload that needs to be carried and the requirement for
fuel stops enroute. Bigger payloads require more fuel stops. When I am by
myself, I am the payload. The fuel is useful in that I can fly that payload for
ten hours if I so desire.
As Always, It All Depends!
Happy Skies,
Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Airpark LL22
Downers Grove, IL 60516
630 985-8502
Message 5
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| Subject: | Re: Alarm System |
--> AeroElectric-List message posted by: "Troy Scott" <tscott1217@bellsouth.net>
Of course the "Nerve Gas Idea" was a joke. BUT, the smoke system also
suggested sounds like a winner......., unless the thief stubs his toe on the
way out. Then your life savings go down the drain.........
Maybe if it became well known that all (well insured) stolen avionics will
self-destruct, Mission Impossible style..........
Message 6
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| Subject: | Re: Weight savings |
--> AeroElectric-List message posted by: echristley@nc.rr.com
>
> I agree totally with John Deakin. My airplane
carries one hundred
> and ten
> gallons in four tanks. I very rarely take off
with full fuel. I
> adjust my
> loads to adapt to the payload that needs to be
carried and the
> requirement for
> fuel stops enroute. Bigger payloads require more
fuel stops. When
> I am by
> myself, I am the payload. The fuel is useful in
that I can fly
> that payload for
> ten hours if I so desire.
>
> As Always, It All Depends!
>
>
> Happy Skies,
>
> Old Bob
You, sir, are perfectly and absolutely correct;
however, just to narrow the scope of the
conversation (because, it will be pointless
otherwise), I think we can limit our considerations
to OBAM aircraft. Otherwise, we don't have much
choice in the selection of components. We'll let
Cessna and Bell worry about their respective
projects 8*)
If we limit the conversation to OBAM aircraft in the
US, then PAYload will never be a consideration,
because the airplane will never be loaded for pay
(at least not legally 8*)
That little side-step brings us back to the original
consideration. How much are you willing to pay so
that your wife can take one more hairbrush or bring
back one more pair of shoes from vacation?
The link to that ancient Narco Omnigator for sale on
Ebay looks good all of a sudden doesn't it? 8*)
Message 7
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| Subject: | Re: Instrument light dimming |
--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com>
Eric M. Jones wrote:
>>>I don't have a really good simple solution other than using two dimmers
>>>- one for the incandescents and one for the EL strips.
>
>
>>This sounds like a job for a cheap microprocessor like a PIC with a couple of
D:A
>>converters. You can program the D:A converters to drive a power op-amp that
>>drives the various lights. You can then tailor the transfer curve any way you
>>want.......Brian Lloyd
>
>
> Brian: That's why you can afford to live in St. Thomas.
Well, actually I can't afford to live in St. Thomas anymore which is why I am spending
a lot of my time doing network consulting in Africa. ;-) Sometimes you
guys are my sanity anchor.
But getting back to light dimming, I have run into this problem in almost every
aircraft panel I have ever worked on. The proliferation of incandescent, LED,
gas-discharge, and EL lighting systems is enough to drive you batty. Perhaps
the one that drove me the most nuts was the LED dimming circuit in the old EI
engine monitor. It had this really weird curve where decreasing the voltage
increased the brightness of the LEDs (and very nonlinearly) as I recall.
The reason I mentioned the PIC is that it has several very attractive features:
1. it is cheap;
2. you can program it very easily, especially the ones that speak BASIC;
3. they have built-in I/O devices so they don't need one to glue a bunch of chips
together;
4. it is really cheap.
It wouldn't be difficult or expensive; it would just take some time to lay out.
Having the ability to define arbitrary voltage/current output from several coordinated
sources would be a real boon.
--
Brian Lloyd 6501 Red Hook Plaza
brianl@lloyd.com Suite 201
http://www.lloyd.com St. Thomas, VI 00802
+1.340.998.9447 (voice) +1.360.838.9669 (fax)
There is a time to laud one's country and a time to protest.
A good citizen is prepared to do either as the need arises.
Message 8
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| Subject: | Making FM Antenna |
--> AeroElectric-List message posted by: N27160@aol.com
Can anybody send me to a site that might have material on making a D.I.Y.
flexible wire antenna for a auto type FM radio?
Message 9
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| Subject: | Re: Weight Savings OFF TOPIC |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
When I took the written part of my pilot's license test, one question was--
"You are in Santa Monica. They are giving away free gold ingots in Mojave.
How much gold can you bring back to Santa Monica in a C150? Describe how you
would plan this flight legally (fuel, weight and balance, etc.)."
My description of this flight included the partial disassembly of the
aircraft, the discarding of all non-essential items, including landing
lights, radios, co-pilot's seat, floorboards, doors (!), carpeting,
headliner, wheel fairings, royalite, etc. Then upon loading up 512 pounds of
gold, draining oil to minimums, followed a tightly planned schedule of
precise partial refuelings (Agua Dulce--1.2 gallon), mathematically
determined to allow for reserve-fuel-only landings at every podunk strip,
private strips (with permission), dry lake beds and airports on the return
route--ten or more landings on the 100 mile or so return flight. Rich, rich,
rich! Absolutely astonishing.
The examiner didn't think so....She frowned at me, shook her head, and after
a long sigh finally said, "Let's rephrase that question ....."
Eric
Message 10
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--> AeroElectric-List message posted by: Chuck Jensen <cjensen@dts9000.com>
Well, that covered the territory from practical to cynical and most area
in-between. The nerve gas idea is real appealing and would be effective for
stopping the thief in his tracks. Of course, if I forgot to disarm the
system....
I'm installing stuff that is costing the same as the GNP of a third world
developing country (CNX80, MX20, SL30, SL70R, dual EFIS, and so on), so I'm
highly motivated to retain ownership. Without a doubt, no security system
is fool proof or will stop a determined thief. In this case, I just want to
"discourage" him (or her---we have to be PC here) as much as possible.
The airport security is quite good but not perfect. Unfortunately, I have to
park outside and fly to other ports and stay overnight from time to time. I
think I'll look into the picture taking idea. With a little luck, the
fellow could have his picture taken twice, with the second hung in the Post
Office. I'm not too worried about a smart thief (an oxymoron) outfoxing the
system, though he may be more adept the second time when he's out on parole.
If I were able to receive an alert on my cell, I could call the airport
security immediately to ask them to take a look, assuming Krispy Kreme has
radio reception. If that high tech stuff doesn't pan out, I can always
revert to car/cycle alarms and see how long it takes the system to screw up.
The noise in the cabin idea seems just a little too easy to defeat. As
pointed out, his own headset, my headset or 25 cent ear plugs and he's home
free. The external audible alarm hooked to my wig-wags seems more
intimidating. I wish these radio companies would come up with a
transmittable position, such as the WSI, which talks to a satellite anyhow.
It would seem if an avionics was registered and reported missing, there
should be a way of tracking it when it talks to somebody next time.
Something along the line of the stolen car reporting system---Black Jack or
whatever it is. Of course, this assumes the avionics companies are even
interested in deterring theft; can you say "repeat customers."
Finally, as to the inquiry about my home base, after having listed my
radios, I think I'll just keep that to myself.
Chuck
N27GV Exp. Velocity at TYS
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of
Richard E. Tasker
Subject: Re: AeroElectric-List: Alarm System
--> AeroElectric-List message posted by: "Richard E. Tasker"
<retasker@optonline.net>
I agree, but unfortunately with the current legal system you would be
the one going to jail - even if the thief was only temporarily
"inconvenienced".
Dick Tasker
Troy Scott wrote:
>--> AeroElectric-List message posted by: "Troy Scott"
<tscott1217@bellsouth.net>
>
>WRT alarms, I think it would be great to rig a nerve gas system that would
>assure the thief would still be by the plane when the police arrive.
>
>Regards,
>Troy
>
>
>
>
Message 11
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| Subject: | Re: Making FM Antenna |
--> AeroElectric-List message posted by: SportAV8R@aol.com
In a message dated 5/19/2004 1:06:31 PM Eastern Daylight Time, N27160 writes:
> Can anybody send me to a site that might have material on
> making a D.I.Y.
> flexible wire antenna for a auto type FM radio?
Solder about 28-30 inches of flexible conductor of your choice to the center conductor
of the coax feedline, erect in the clear, and you're good to go. Really,
receiving antenna design is about that simple. No real need to agonize over
impedance matching, ground planes, or even polarization for FM listening except
at the very fringes. Most FM stations pump out way more than enough wattage
for easy reception while airborne. A bigger problem might be hearing too
many stations at once, but the capture effect of an FM discriminator makes that
less annoying than the heterodyne beat of two or more AM stations sharing the
same frequency.
A more exact formula for a resonant quarter-wave whip antenna (typ. 36-52 ohms
when operated against a ground plane, depending on its slope) is : length (inches)=2800/frequency
(MHz). Capacitive "end-effects" will throw this formula off,
but again, for reception, it makes NO PRACTICAL DIFFERENCE.
Don't sweat the small stuff ;-)
-Bill B / "Stormy"
RV-6A
Message 12
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| Subject: | Re: Weight Savings OFF TOPIC |
--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com>
Actually, I am doing this for my CJ6A project. I view extra weight as something
to be avoided without getting crazy. Extra weight translates into several things
I wish to avoid:
1. reduced rate-of-climb;
2. reduced operational ceiling;
3. increased stall speed;
4. reduced fuel capacity;
5. additional load on structures during aerobatics;
6. increased induced drag.
I have to pay for weight with horsepower which then increases fuel burn and required
fuel. If I can reduce weight I can get to a higher and more efficient altitude
where fuel burn for a given TAS will be lower.
So in my case I have dispensed with all the heavy Chinese electrical crap. Just
for grins I weighed some of the stuff I removed. Just for example:
1. existing wiring harness (100% shielded in copper braid), 110 lbs;
2. ADF loop antenna, 25 lb;
3. ADF electronics module, 40 lb;
4. ADF control heads, 20 lb;
5. ADF power supply (dynamotor), 30 lb;
6. 60A/28V generator, 25 lb;
7. generator noise filter, 10 lb;
8. generator voltage regulator, 15 lb.
Some of this stuff will be replaced by modern equipment, e.g. the generator will
be replaced by a B&C alternator for primary power and I will add a B&C alternator
or dynamo to the vacuum pump pad for backup power. (I am probably going
to do the dual-alternator, single battery topology.) (And yes Bob, I need to
keep 24V for the existing lights and the electrically-operated starting air valve.)
I also got rid of the Chinese iron gyros with their rotary inverters, the remote
compass (with vacuum tube servo amp), and a lot of other heavy instruments.
I will save 400+ pounds by moving to modern stuff, i.e. a Blue Mountain EFIS-1
(both cockpits). That is a bunch of horsepower saved and a serious increase
in service ceiling not to mention a serious improvement in reliability.
--
Brian Lloyd 6501 Red Hook Plaza
brianl@lloyd.com Suite 201
http://www.lloyd.com St. Thomas, VI 00802
+1.340.998.9447 (voice) +1.360.838.9669 (fax)
There is a time to laud one's country and a time to protest.
A good citizen is prepared to do either as the need arises.
Message 13
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| Subject: | Re: Alarm System |
--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com>
Chuck Jensen wrote:
> I wish these radio companies would come up with a
> transmittable position, such as the WSI, which talks to a satellite anyhow.
> It would seem if an avionics was registered and reported missing, there
> should be a way of tracking it when it talks to somebody next time.
> Something along the line of the stolen car reporting system---Black Jack or
> whatever it is. Of course, this assumes the avionics companies are even
> interested in deterring theft; can you say "repeat customers."
I actually built such a module once. It was for my ham gear and transmitted my
callsign in morse code at a low level in the background of my voice every time
I keyed the mic. This was pre-microprocessors so it took four or five chips
to do. Nowadays it would be even easier. Again, that little one-chip PIC looks
interesting.
> Finally, as to the inquiry about my home base, after having listed my
> radios, I think I'll just keep that to myself.
So how are things in Knoxville? ;-)
> Chuck
> N27GV Exp. Velocity at TYS
--
Brian Lloyd 6501 Red Hook Plaza
brianl@lloyd.com Suite 201
http://www.lloyd.com St. Thomas, VI 00802
+1.340.998.9447 (voice) +1.360.838.9669 (fax)
There is a time to laud one's country and a time to protest.
A good citizen is prepared to do either as the need arises.
Message 14
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| Subject: | Re: Alarm System |
--> AeroElectric-List message posted by: echristley@nc.rr.com
> intimidating. I wish these radio companies would
come up with a
> transmittable position, such as the WSI, which
talks to a satellite
> anyhow.It would seem if an avionics was registered
and reported
> missing, there
> should be a way of tracking it when it talks to
somebody next time.
Do you really want to give Big Brother another way
of tracking you? Looking forward to getting
'tickets' for flying in TFR zones while I'm at work
and my plane has its engine removed for
maintanence. And referring to the 'One Star' thing
that they're selling, there's no way I'm going to
let someone else remotely unlock my car just so that
they'll be able to call the fire department for me.
(Please forgive me if you haven't heard this
ridiculous string of commercials.)
There are technological impediments to improvement,
then there are the sociological ones.
Message 15
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--> AeroElectric-List message posted by: "Bruce Gray" <Bruce@glasair.org>
All the manufacturers maintain a database of stolen serial numbers. So
if your missing radio ever goes in for factory repair, you'll (or the
insurance company) will get it back.
Bruce
www.glasair.org
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Brian
Lloyd
Subject: Re: AeroElectric-List: Alarm System
--> AeroElectric-List message posted by: Brian Lloyd <brianl@lloyd.com>
Chuck Jensen wrote:
> I wish these radio companies would come up with a
> transmittable position, such as the WSI, which talks to a satellite
anyhow.
> It would seem if an avionics was registered and reported missing,
there
> should be a way of tracking it when it talks to somebody next time.
> Something along the line of the stolen car reporting system---Black
Jack or
> whatever it is. Of course, this assumes the avionics companies are
even
> interested in deterring theft; can you say "repeat customers."
I actually built such a module once. It was for my ham gear and
transmitted my callsign in morse code at a low level in the background
of my voice every time I keyed the mic. This was pre-microprocessors so
it took four or five chips to do. Nowadays it would be even easier.
Again, that little one-chip PIC looks interesting.
> Finally, as to the inquiry about my home base, after having listed my
> radios, I think I'll just keep that to myself.
So how are things in Knoxville? ;-)
> Chuck
> N27GV Exp. Velocity at TYS
--
Brian Lloyd 6501 Red Hook Plaza
brianl@lloyd.com Suite 201
http://www.lloyd.com St. Thomas, VI 00802
+1.340.998.9447 (voice) +1.360.838.9669 (fax)
There is a time to laud one's country and a time to protest.
A good citizen is prepared to do either as the need arises.
==
==
==
==
Message 16
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| Subject: | Re: Weight Savings OFF TOPIC |
--> AeroElectric-List message posted by: BobsV35B@aol.com
In a message dated 5/19/04 12:57:34 PM Central Daylight Time,
emjones@charter.net writes:
My description of this flight included the partial disassembly of the
aircraft, the discarding of all non-essential items, including landing
lights, radios, co-pilot's seat, floorboards, doors (!), carpeting,
headliner, wheel fairings, royalite, etc. Then upon loading up 512 pounds of
gold, draining oil to minimums, followed a tightly planned schedule of
precise partial refuelings (Agua Dulce--1.2 gallon), mathematically
determined to allow for reserve-fuel-only landings at every podunk strip,
private strips (with permission), dry lake beds and airports on the return
route--ten or more landings on the 100 mile or so return flight. Rich, rich,
rich! Absolutely astonishing.
I like the way you think!!!
Do Not Archive
Happy Skies,
Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Airpark LL22
Downers Grove, IL 60516
630 985-8502
Message 17
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| Subject: | Re: Weight Savings OFF TOPIC |
--> AeroElectric-List message posted by: BobsV35B@aol.com
In a message dated 5/19/04 2:05:36 PM Central Daylight Time, brianl@lloyd.com
writes:
Actually, I am doing this for my CJ6A project. I view extra weight as
something to be avoided without getting crazy. Extra weight translates into several
things I wish to avoid:
Another guy that thinks like I do!
Now, is that good or bad??
Do Not Archive
Happy Skies,
Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Airpark LL22
Downers Grove, IL 60516
630 985-8502
Message 18
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| Subject: | Re: Instrument light dimming |
--> AeroElectric-List message posted by: "James Redmon" <james@berkut13.com>
OK, I just fixed the problem. Thanks for the input, all.
Here is a link to the data sheet on the inverter I have:
http://www.umainstruments.com/PMAdocs/10-700Inverter.doc
I simply added a 1/4-watt 470-ohm resistor to the DC supply side coming from
the dimmer unit. I tried various resistors from 1k (no light at all) to
150-ohm (no noticeable affect). The 470 put the two EL rings in the same
range as the incandescent lamps. Bingo, problem solved. Of course, this
simple solution also reduced the "full bright" level...but not so much so
that they are dimmer than the other instruments at the same power level.
Very even brightness levels now, and dimmable to almost zero.
...now, if I can just get the EFIS-Lite dimmed output under control...but
that's another story.
Thanks again,
James Redmon
Berkut #013 N97TX
http://www.berkut13.com
----- Original Message -----
From: "James Foerster" <jmfpublic@comcast.net>
Subject: AeroElectric-List: Re: Instrument light dimming
> --> AeroElectric-List message posted by: "James Foerster"
<jmfpublic@comcast.net>
>
> James and Eric,
>
> I had planned on using electroluminescent (EL) strips for lighting, and
bought parts from All Electronics which included a 12 inch by 1 inch EL
strip($6) and an inverter ($3 or $4) I did try the resistor in series with
the inverter, and it worked to some extent. I used fixed resistors to
experiment. You could do the same, find the biggest resistor that still
lets your inverter start and drive the two EL lights, and then find a 2 or 5
watt rheostat of the same value as your biggest fixed resistor. Measure
current so that you can calculate needed wattage. Your particular inverter
will determine the load and dimming range of this setup.
>
> To have a one knob solution, you could use a light controlled resistor in
series with the inverter. For example, the CAT# PRE-19 from All
Electronics, is a 1" by 0.85" photocell which is 20 ohms with full
illumination going to 5000 ohms in the dark. This would need to dissipate
some power, so bonding to a small heat sink or to the metal mounting for
your switch panel might work. You would enclose this with a light bulb
powered by your dimmer, and as the light from the bulb fell, the photocell
would increase its resistance. The amount of experimenting to get this to
track the incandescent bulbs might not be worth it for a one-off project,
though.
>
> Changing frequency from the inverter is an elegant solution, but the color
of the light will change as well as the intensity. Since the eye does not
see color in low light, this is not a problem for instrument lighting.
Using an NE555 as the waveform source would be easy, but again it would take
more building and experimentation than a one-off project warrants.
>
> Ultimately, I decided not to use the EL strips, but rather use LEDs. The
LEDs are more reliable in that they do not need an inverter, just a series
resistor. If you already have the EL ring lights, you will need to live
with that solution.
>
> Jim Foerster, J400 80% done, waiting for me to wire.
Message 19
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| Subject: | Re: Instrument light dimming |
--> AeroElectric-List message posted by: "James Redmon" <james@berkut13.com>
..uh...make that 1/2-watt. Bad fingers...bad!
> I simply added a 1/4-watt 470-ohm resistor...
Message 20
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| Subject: | Re: Alarm System |
--> AeroElectric-List message posted by: jerb <ulflyer@verizon.net>
Actually the NorthStar system is actually pretty neat and handy. You raise
the question, do you have a reason to fear the possibility of being tracked?
jerb
At 04:16 PM 5/19/04 -0400, you wrote:
>--> AeroElectric-List message posted by: echristley@nc.rr.com
>
>
> > intimidating. I wish these radio companies would
>come up with a
> > transmittable position, such as the WSI, which
>talks to a satellite
> > anyhow.It would seem if an avionics was registered
>and reported
> > missing, there
> > should be a way of tracking it when it talks to
>somebody next time.
>
>Do you really want to give Big Brother another way
>of tracking you? Looking forward to getting
>'tickets' for flying in TFR zones while I'm at work
>and my plane has its engine removed for
>maintanence. And referring to the 'One Star' thing
>that they're selling, there's no way I'm going to
>let someone else remotely unlock my car just so that
>they'll be able to call the fire department for me.
>(Please forgive me if you haven't heard this
>ridiculous string of commercials.)
>
>There are technological impediments to improvement,
>then there are the sociological ones.
>
>
Message 21
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| Subject: | B-8 stickgrip switches |
--> AeroElectric-List message posted by: "Jim Stone" <jrstone@insightbb.com>
I just bought a B-8 stick grip and I'm trying to figure out how to make it do what
I want.
The switches are all normally open, momentary on. For an example, I want to turn
on my boost pump with one of the buttons and then turn it off later. Should
I try to find a replacement switch of the type "push on push off" or is there
a relay of sorts out there that will latch the connection closed?
Thanks,
Jim
Message 22
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| Subject: | Re: Alarm System |
--> AeroElectric-List message posted by: echristley@nc.rr.com
----- Original Message -----
From: jerb <ulflyer@verizon.net>
Subject: Re: RE: AeroElectric-List: Alarm System
> --> AeroElectric-List message posted by: jerb
<ulflyer@verizon.net>
>
> Actually the NorthStar system is actually pretty
neat and handy.
> You raise
> the question, do you have a reason to fear the
possibility of being
> tracked?jerb
>
>
>
HEH! I MADE them teach me to land when I got my
flying lessons!!
8*)
Seriously, though. I got audited one year when I
was driving a tractor trailer, 'cause I didn't have
a receipt for a $200 federal tax I paid (Yeah, you
heard right. I got in trouble with the IRS for not
having a receipt for money I gave to the IRS.) The
interesting thing is, no state in the union will
sell you tractor truck tags without proof of paying
the tax. It drug out for over a year before they
finally succumbed to logic, and I still ended up
paying $10 in interest on money I didn't owe.
Yeah. I have reasons to fear being tracked.
Message 23
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| Subject: | Re: Alarm System |
--> AeroElectric-List message posted by: "Mike Heinen" <mjheinen@adelphia.net>
Alarm:I am using robodog...a menacing rotweiler recording that is motion
activated as well as a flashing LED.Also the hanger has motion activated
video that records on vcr and sends pictures via the internet...so if they
take everything I still have the photos...agian to keep the honest ones
honest.....so far has scared a few of my friends...
Robo Dog avalable at x10.com
Message 24
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| Subject: | B-8 stickgrip switches |
--> AeroElectric-List message posted by: "Ron Koyich" <Ron@Koyich.com>
>>For an example, I want to turn on my boost pump with one of the buttons
and then turn it off later. <<
Just my thoughts.....
You can, of course, make that switch do whatever you want with outboard
electronic or electromechanical switching.
However: The boost pump is a fairly important unit in many installations.
I'd personally go with a plain Jane switch or CB switch on the panel.
Use the B-8 switches for something less critical, like your machine guns.
Ron
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