Today's Message Index:
----------------------
1. 07:29 AM - Fuse block connections (Paul Messinger)
2. 08:30 AM - Re: Fuse block connections (Robert L. Nuckolls, III)
3. 09:41 AM - Re: Fuse block connections (Paul Messinger)
4. 11:01 AM - Re: Hat switch and Stick grips (Eric M. Jones)
5. 11:14 AM - Re: Firewall Penetrations-summary as of Sep 2004 (was Re: (thomas a. sargent)
6. 11:34 AM - Re: Hat switch (John D. Heath)
7. 11:35 AM - Idle speculation on Firewalls (Eric M. Jones)
8. 11:54 AM - Re: Fuse block connections (Robert L. Nuckolls, III)
9. 12:32 PM - Re: Idle speculation on Firewalls (Matt Prather)
10. 01:06 PM - Re: Hat switch (Fiveonepw@aol.com)
11. 01:44 PM - Re: Hat switch (RV8ter@aol.com)
12. 01:53 PM - Re: Hat switch (Fiveonepw@aol.com)
13. 02:59 PM - Main Buss Voltage (DAVID REEL)
14. 03:37 PM - Re: PTC Overload Protectors (John Tvedte)
15. 03:39 PM - Re: Hat switch (John D. Heath)
16. 04:05 PM - Re: Main Buss Voltage (Matt Prather)
17. 04:23 PM - NAV bulkhead fittings (Mickey Billings)
18. 04:40 PM - Re: Hat switch (Richard Tasker)
19. 05:55 PM - Re: Hat switch (RV8ter@aol.com)
20. 06:02 PM - Starter vs Master contactor (Chris Horsten)
21. 06:06 PM - Re: Hat switch and Stick grips (glaesers)
22. 06:47 PM - Re: Starter vs Master contactor (Robert L. Nuckolls, III)
23. 06:48 PM - Re: NAV bulkhead fittings (Robert L. Nuckolls, III)
Message 1
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| Subject: | Fuse block connections |
--> AeroElectric-List message posted by: "Paul Messinger" <paulm@olypen.com>
Bob,
You again point out the gas tight type of connection which I agree is the
best way.
However ALL the fuse blocks I can find (most are BUSS brand) have only a
light contact on the fuse terminal and at least one of the two terminals is
loosely captive in the molded housing and thus free to move slightly during
in flight vibration. I do not believe that tying the wires down close to the
assy is sufficient.
Thus they neither provide the gas tight "fast on" connection and are not
completely rigid. The concept of fuses is good but in all the holders I can
find the implementation is unacceptable to me.
Paul
----- Original Message -----
From: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
Subject: Re: AeroElectric-List: PTC Overload Protectors
> but the mash-screw terminal strips
> illustrated in several suggested products do not offer gas-tight
> electrical connections -OR- vibration support. The lowly fuse-block
> is still the hands-down winner for parts-count minimization.
Message 2
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| Subject: | Re: Fuse block connections |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
At 07:25 AM 9/30/2004 -0700, you wrote:
>--> AeroElectric-List message posted by: "Paul Messinger" <paulm@olypen.com>
>
>Bob,
>
>You again point out the gas tight type of connection which I agree is the
>best way.
>
>However ALL the fuse blocks I can find (most are BUSS brand) have only a
>light contact on the fuse terminal and at least one of the two terminals is
>loosely captive in the molded housing and thus free to move slightly during
>in flight vibration. I do not believe that tying the wires down close to the
>assy is sufficient.
Exactly . . . that's just what you don't want to do.
>Thus they neither provide the gas tight "fast on" connection and are not
>completely rigid. The concept of fuses is good but in all the holders I can
>find the implementation is unacceptable to me.
As it was explained to me, the output terminals of the fuse-blocks
are designed to "float" and the designer assumes they'll be installed
with some amount of service loops in the wiring such that forces
induced on the fuse connections by the short piece of wire don't
cause the tab joints to be "worked" by external forces. The wire bundles
just outside the service loop get tied down but the interval between
a secure bundle all the way into the bus-side fuse contact are designed
with that float in mind. The trifurcated contacts that grip a fuse tab
exert PRESSURES on the tab-material on a par with fast-on tabs. Hence
the "bright metal" tracks visible on the fuse when extracted from the
holder. Folks having the most difficulty with these fuseholders
have either (1) mounted them where they get hit and the fuse-grips are
bent and (2) have used some after-market fuses of unknown origin (bright,
hard tabs) that prevent surface metal upset with the clips inside.
Dave Swartzendruber was talking about another fuseholder product that
offered open barrel terminals that could be crimped on the end of a wire
and inserted into the back surface of the fuseholder, normal to the surface.
These terminals offered large area, low pressure contact with fuse tabs
and for that reason, I would not recommend them . . . ALTHOUGH, these
too are a Bussmann product and perhaps I'm not cognizant of all the
considerations by folks who know a hell of a lot more about the
design of their product than I do.
To be sure, the overall service life of the fuseholder is probably
shorter than a panel full of breakers . . . but given the service history
so far, I've not observed any compelling reasons to stop recommending
them. When they DO fail, they don't set the airplane on fire and they're
easy and inexpensive to replace. Failures have been very rare and most
were induced by external damage. One has to have a little faith in
a name like Bussmann who has been making circuit protection products
for all manner of vehicle and building for nearly 100 years. Bussmann
rates them for a LOT higher current levels than we'll every need
in aircraft. My design recommendations are to not load any feeder
to more than 10A continuous. With this de-rating and reasonable attention
to mounting them so they don't get kicked every time the passenger crawls
into the airplane, they have performed well. Yes, the fuseholder is not
as robust as a breaker panel but its overall cost of ownership is still
attractive.
Bob . . .
---
Message 3
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| Subject: | Re: Fuse block connections |
--> AeroElectric-List message posted by: "Paul Messinger" <paulm@olypen.com>
Thanks for your quick reply.
----- Original Message -----
From: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
Subject: Re: AeroElectric-List: Fuse block connections
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<b.nuckolls@cox.net>
>
> The trifurcated contacts that grip a fuse tab
> exert PRESSURES on the tab-material on a par with fast-on tabs.
Not my experience. The contact force is quite light and its easy to install
or remove with finger tips. Hardly a mark on the fuse tabs also. the often
available fuse extractor tool is simply not needed as the extraction of a
single fuse in a row is not a problem if your finger nails are reasonable
length.The Fast-on PIDG terminals are 10X-100X higher force. In fact they
require mechanical assisted grip to separate.
In fact the extraction force required is so light one could worry about them
falling out on their own under vibration (of course not but its really light
and only a few ounces of force to insert or remove).
Perhaps just fine but not to my liking at all.
> Hence
> the "bright metal" tracks visible on the fuse when extracted from the
> holder.
I have only very light marks and under magnification superfical only nothing
like the deep tracks from fast-on's. This with brand name fuses
I have tried several different holders (most Bussmann brand) and all with
the same result.
I am not questioning your position on fuses vs CB as that is a personal
decision. I have been unable to find a fuse holder that retains the fuses
with reasonable (to me) contact pressure. I also am not concerned with the
insertion life cycle number as a fuse should rarely need changing in a
proper design.
Paul
> To be sure, the overall service life of the fuseholder is probably
> shorter than a panel full of breakers . . . but given the service
history
> so far, I've not observed any compelling reasons to stop recommending
> them. When they DO fail, they don't set the airplane on fire and
they're
> easy and inexpensive to replace. Failures have been very rare and most
> were induced by external damage. One has to have a little faith in
> a name like Bussmann who has been making circuit protection products
> for all manner of vehicle and building for nearly 100 years. Bussmann
> rates them for a LOT higher current levels than we'll every need
> in aircraft. My design recommendations are to not load any feeder
> to more than 10A continuous. With this de-rating and reasonable
attention
> to mounting them so they don't get kicked every time the passenger
crawls
> into the airplane, they have performed well. Yes, the fuseholder is not
> as robust as a breaker panel but its overall cost of ownership is still
> attractive.
>
> Bob . . .
>
>
> ---
>
>
Message 4
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| Subject: | Re: Hat switch and Stick grips |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
--> AeroElectric-List message posted by: Richard Riley <richard@riley.net>
I found a Saitek Cyborg 2000 joystick at a fleamarket for $5. I only need
one more but I can get them on eBay all day long.
Before buying a joystick PLEASE take a look at this thing (BEST BUY has
them). The worst I can say about it is that it has more buttons than I have
uses for. But I'll leave them so I can tell passengers--"My Gawd...Whatever
you do, DON'T push that button!"
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
Message 5
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| Subject: | Re: ll Penetrations-summary as of Sep 2004 (was Re: AeroElectric-List: |
stainless towel bar firewall penetrations clamav-milter version 0.80c on
juliet.albedo.net
--> AeroElectric-List message posted by: "thomas a. sargent" <sarg314@earthlink.net>
Dennis:
I have a this stuff and will use it to seal the firewall and probably
some of the firewall penetrations, but it has a drawback. It is a 2
part epoxy-like material (with a 12-month shelf life). You mix the whole
batch at once (the dispenser is designed to do exactly that) and you use
it and toss the rest away. My understanding, which may well be wrong,
is that it is more permanent and more glue-like than the 3m caulk. I
think the 3M caulk is what you want to use on the wires in the towel bar
pass thru because it is a less demanding application and the caulk will
remain soft enough to easily remove it from the wires. I intend to use
the caulk in only the towel bar pass-thru.
glaesers wrote:
> --> AeroElectric-List message posted by: "glaesers" <glaesers@wideopenwest.com>
>
> I was just browsing the Van's Aircraft website and found the following: (in
> their catalog under Miscellaneous Items)
> -------------------------
> CS 1900 is a compound for sealing firewall structures. It is elastomeric at
> operating temperatures from minus 65 degrees to plus 400 degrees F and able
> to withstand flash temperatures of 2000 degrees F. This product can be used
> as a perimeter firewall seal on existing aircraft or during construction of
> new aircraft.
--
Tom Sargent, RV-6A, Landing gear
Message 6
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--> AeroElectric-List message posted by: "John D. Heath" <alto_q@direcway.com>
Another alternative you might want to look at is here
http://www.chproducts.com/retail/CS.htm
If it even comes close to the quality of their joysticks used for gaming,
You will be more than
satisfied.
John D.
----- Original Message -----
From: "Scott Jackson" <jayeandscott@telus.net>
Subject: Re: AeroElectric-List: Hat switch
> --> AeroElectric-List message posted by: "Scott Jackson"
> <jayeandscott@telus.net>
>
> Might I suggest trying the replica B-8 stickgrip from Wicks?
> ----- Original Message -----
> From: "Richard Riley" <richard@RILEY.NET>
> To: <aeroelectric-list@matronics.com>
> Subject: Re: AeroElectric-List: Hat switch
>
>
>> --> AeroElectric-List message posted by: Richard Riley
>> <richard@riley.net>
>>
>>
Message 7
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| Subject: | Idle speculation on Firewalls |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
In April 1993, Jane's International Defense Review touted the discovery by a
British hairdresser and amateur inventor, Maurice Ward, of a thin "plastic"
coating able to withstand temperatures of 2,700 degrees Celsius. This was
widely celebrated in the popular press and lots of money changed hands.
Maurice now runs race horses and who know where Starlite is?
But at the time I was not too surprised, since a propane torch was one of my
favorite childhood playthings. Barriers that withstand high temperatures are
easy to make out of common materials. The popular press's fascination seemed
to be the result of not checking the material property archives. Or not
having a little boy in the basement with a propane torch.
The FAA see these things in terms from 1930's designs, but today 3M will
sell you blow torch proof "Dot paper" and there are lots of ceramic cloths
and clever materials that will do better for less weight. I have a source
for suitable titanium sheet---and for a while had planned to sell material,
but ultimately there are far better ways to go. Besides, the builder really
wants not only a barrier, but a low thermal-conductivity surface, since
frying whatever is on the cabin side of the barrier can be a real problem.
The ideal firewall is a composite sandwich.
I experimented with a kind of hollow cork to be used as a feedthrough. This
was made of silicone and ceramic microballlons, and works like a champ---but
I never figured out how to charge an acceptable price so that the buy and
seller would both be happy.
Some Lancairs have their cabin air vents in the tail. This is a great idea
since the cabin can be kept at a slightly higher pressure than the engine
compartment without sucking in smoke and fire.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
"The man who carries a cat by the tail
learns something that can be learned
in no other way."
--Mark Twain
Message 8
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| Subject: | Re: Fuse block connections |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
At 09:35 AM 9/30/2004 -0700, you wrote:
>--> AeroElectric-List message posted by: "Paul Messinger" <paulm@olypen.com>
>
>Thanks for your quick reply.
>----- Original Message -----
>From: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
>To: <aeroelectric-list@matronics.com>
>Subject: Re: AeroElectric-List: Fuse block connections
>
>
> > --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
><b.nuckolls@cox.net>
> >
> > The trifurcated contacts that grip a fuse tab
> > exert PRESSURES on the tab-material on a par with fast-on tabs.
>
> Not my experience. The contact force is quite light and its easy to install
>or remove with finger tips. Hardly a mark on the fuse tabs also. the often
>available fuse extractor tool is simply not needed as the extraction of a
>single fuse in a row is not a problem if your finger nails are reasonable
>length.The Fast-on PIDG terminals are 10X-100X higher force. In fact they
>require mechanical assisted grip to separate.
Force is not the same as pressure. It's pressure that sets electrical
integrity of the connection. There are millions of vehicles using
similar if not identical connections.
>In fact the extraction force required is so light one could worry about them
>falling out on their own under vibration (of course not but its really light
>and only a few ounces of force to insert or remove).
>
>Perhaps just fine but not to my liking at all.
Take the insertion/retraction forces and divide by weight of the
fuse (about 1.2 grams each) and you get g's of acceleration required
to dislodge them. It's a surprisingly large number on the order of
30-50 g's
I understand your skepticism . . .
The first one of those holders I saw was handed to me at OSH. It laid
on my desk for a year getting worried about before I really began to
consider features of the design.
A supplier drug a cadre of reps into Raytheon some years ago. One
of them was a rep for Cooper Bussmann. I asked him about those same
issues and he got on the phone to somebody at Bussmann who was
happy to explain them to me.
They sorta grow on you.
Bob . . .
---
Message 9
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| Subject: | Re: Idle speculation on Firewalls |
--> AeroElectric-List message posted by: "Matt Prather" <mprather@spro.net>
Hi Eric,
I impressed by your command of tech trivia. Good stuff!
> --> AeroElectric-List message posted by: "Eric M. Jones"
> <emjones@charter.net>
>
> In April 1993, Jane's International Defense Review touted the discovery
snip
The tail is probably okay, but I might prefer an inlet out on the wing,
further
from the centerline, should an engine decide to belch out a large volume
of stinky stuff. I guess if you studied the airflow at various angles of
attack,
there's probably some location on the fin that wouldn't pick up smoke. I
suppose you could just mount the engine where it belongs (in back)... :)
>
> Some Lancairs have their cabin air vents in the tail. This is a great
> idea since the cabin can be kept at a slightly higher pressure than the
> engine compartment without sucking in smoke and fire.
>
> Regards,
> Eric M. Jones
> www.PerihelionDesign.com
> 113 Brentwood Drive
> Southbridge MA 01550-2705
> Phone (508) 764-2072
> Email: emjones@charter.net
>
> "The man who carries a cat by the tail
> learns something that can be learned
> in no other way."
> --Mark Twain
>
>
Regards,
Matt-
VE N34RD
Message 10
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--> AeroElectric-List message posted by: Fiveonepw@aol.com
In a message dated 9/30/04 1:34:57 PM Central Daylight Time,
alto_q@direcway.com writes:
> Another alternative you might want to look at is here
> http://www.chproducts.com/retail/CS.htm
>
> If it even comes close to the quality of their joysticks used for gaming,
> You will be more than
> satisfied.
>>>>>>
I've got these on my plane & love them- much cleaner design that the military
style, plenty of buttons with none in the way, ambidextrous and very
comfortable....
From The Possumworks - Mark, & no interest in CH, just a satisfied customer
do not archive
Message 11
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--> AeroElectric-List message posted by: RV8ter@aol.com
Who did you order the CH sticks from and what was the price?
In a message dated 9/30/2004 4:07:34 PM Eastern Standard Time,
Fiveonepw@aol.com writes:
--> AeroElectric-List message posted by: Fiveonepw@aol.com
In a message dated 9/30/04 1:34:57 PM Central Daylight Time,
alto_q@direcway.com writes:
> Another alternative you might want to look at is here
> http://www.chproducts.com/retail/CS.htm
>
> If it even comes close to the quality of their joysticks used for gaming,
> You will be more than
> satisfied.
>>>>>>
I've got these on my plane & love them- much cleaner design that the
military
style, plenty of buttons with none in the way, ambidextrous and very
comfortable....
From The Possumworks - Mark, & no interest in CH, just a satisfied customer
do not archive
Message 12
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--> AeroElectric-List message posted by: Fiveonepw@aol.com
In a message dated 9/30/04 3:45:44 PM Central Daylight Time, RV8ter@aol.com
writes:
> Who did you order the CH sticks from and what was the price?
>>>>>>
Order from Kevin Williamson at http://www.chproducts.com/retail/CS.htm
Kevin built a really nice -7 and has been at OSH the last couple of years- he
adapted the stick from their gaming product
Mark do not archive
Message 13
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| Subject: | Main Buss Voltage |
--> AeroElectric-List message posted by: "DAVID REEL" <dreel@cox.net>
When I power up the essential buss alone, I measure 1/2 volt on the main buss.
Checking the wiring of the Radio Shack 276-1185 rectifier per Z11, it looks OK.
I was under the impression 0 volts would be obtained. Is this right or is
the rectifier faulty? If right, won't there be some power drain if lights or
other main buss things are left on during essential buss operation?
Dave Reel - RV8A
Message 14
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| Subject: | Re: PTC Overload Protectors |
--> AeroElectric-List message posted by: "John Tvedte" <JohnT@comp-sol.com>
Bob,
Haven't you also suggested that it isn't always a good idea to turn
something back on - if a fuse/breaker blows during flight?
John
Message 15
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--> AeroElectric-List message posted by: "John D. Heath" <alto_q@direcway.com>
keven@chproducts.com
John D.
----- Original Message -----
From: <RV8ter@aol.com>
Subject: Re: AeroElectric-List: Hat switch
> --> AeroElectric-List message posted by: RV8ter@aol.com
>
>
> Who did you order the CH sticks from and what was the price?
>
> In a message dated 9/30/2004 4:07:34 PM Eastern Standard Time,
> Fiveonepw@aol.com writes:
>
> --> AeroElectric-List message posted by: Fiveonepw@aol.com
>
> In a message dated 9/30/04 1:34:57 PM Central Daylight Time,
> alto_q@direcway.com writes:
>
>> Another alternative you might want to look at is here
>> http://www.chproducts.com/retail/CS.htm
>>
>> If it even comes close to the quality of their joysticks used for
>> gaming,
>> You will be more than
>> satisfied.
>
>>>>>>>
>
> I've got these on my plane & love them- much cleaner design that the
> military
> style, plenty of buttons with none in the way, ambidextrous and very
> comfortable....
>
> From The Possumworks - Mark, & no interest in CH, just a satisfied
> customer
> do not archive
>
>
>
Message 16
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| Subject: | Re: Main Buss Voltage |
--> AeroElectric-List message posted by: "Matt Prather" <mprather@spro.net>
Something sounds a bit strange. I wouldn't guess that a rectifier would
fail like that. What other components are electrically connected to the
main bus. Did you have the main bus turned on, then off, then measure.
The two things I can think of that might be happening are maybe you have
a gyro spooled up, and as it spools down it behaves like a generator until
it stops. The other thing I can think of maybe there is a cap charged up
on on of the system components, and its taking a long time for it to
discharge.
Or maybe there is a battery backup in something on the main bus.
What happens to the main bus voltage when something powered by the
main bus is turned on? It may be that you are getting just a little reverse
bias leakage current through the diodes. Connecting your voltmeter is
such a low current load that it may not drag the main bus voltage down
very much. Try turning on the landing light (or something like that) and
check the bus voltage. I'll bet it will go to zero. If it does, and you
want
to feel even better about it, connect an ammeter in line with whatever
load you turned on to make sure that the current is VERY low (100mA
would be a lot)
Regards,
Matt-
> --> AeroElectric-List message posted by: "DAVID REEL" <dreel@cox.net>
>
> When I power up the essential buss alone, I measure 1/2 volt on the main
> buss. Checking the wiring of the Radio Shack 276-1185 rectifier per
> Z11, it looks OK. I was under the impression 0 volts would be obtained.
> Is this right or is the rectifier faulty? If right, won't there be
> some power drain if lights or other main buss things are left on during
> essential buss operation?
>
> Dave Reel - RV8A
>
>
Message 17
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| Subject: | NAV bulkhead fittings |
--> AeroElectric-List message posted by: "Mickey Billings" <mbilli@cox.net>
Bob our NAV antenna is located in the wing tip of our RV7. I would like to
know if I can use a BNC bulkhead fitting at the tip rib and another one at
the wing attach point without signal loss. The reasoning behind this is
ease of accessibility when removing the wing or wing tip. As always, thanks
in advance for the help.
Mickey Billings
N445BH RV7
Message 18
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--> AeroElectric-List message posted by: Richard Tasker <retasker@optonline.net>
You will have better luck with: Kevin@chproducts.com :-)
Dick Tasker
John D. Heath wrote:
>--> AeroElectric-List message posted by: "John D. Heath" <alto_q@direcway.com>
>
>keven@chproducts.com
>
> John D.
>----- Original Message -----
>From: <RV8ter@aol.com>
>To: <aeroelectric-list@matronics.com>
>Subject: Re: AeroElectric-List: Hat switch
>
>
>
>
>>--> AeroElectric-List message posted by: RV8ter@aol.com
>>
>>
>>Who did you order the CH sticks from and what was the price?
>>
>>In a message dated 9/30/2004 4:07:34 PM Eastern Standard Time,
>>Fiveonepw@aol.com writes:
>>
>>--> AeroElectric-List message posted by: Fiveonepw@aol.com
>>
>>In a message dated 9/30/04 1:34:57 PM Central Daylight Time,
>>alto_q@direcway.com writes:
>>
>>
>>
>>>Another alternative you might want to look at is here
>>>http://www.chproducts.com/retail/CS.htm
>>>
>>>If it even comes close to the quality of their joysticks used for
>>>gaming,
>>>You will be more than
>>> satisfied.
>>>
>>>
>>I've got these on my plane & love them- much cleaner design that the
>>military
>>style, plenty of buttons with none in the way, ambidextrous and very
>>comfortable....
>>
>>From The Possumworks - Mark, & no interest in CH, just a satisfied
>>customer
>>
>>
>>
>
>
Message 19
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--> AeroElectric-List message posted by: RV8ter@aol.com
what i saw in the CH stick I didn't like was no momentary toggle switch for
flaps. :-(
Message 20
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| Subject: | Starter vs Master contactor |
--> AeroElectric-List message posted by: "Chris Horsten" <airplanes@sympatico.ca>
I'm just getting ready to put back the master and starter solenoids into my
Zenith and find that I cannot tell which one is the continuous duty and
which is the other. I have a new four terminal one I am going to use for the
starter, and two 3 terminal ones. I can't figure out which is the continuous
duty. Is there any way to tell?
Thanks
Chris H
Zenair CH-300
Message 21
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| Subject: | Re: Hat switch and Stick grips |
--> AeroElectric-List message posted by: "glaesers" <glaesers@wideopenwest.com>
>Before buying a joystick PLEASE take a look at this thing (BEST BUY has
>them). The worst I can say about it is that it has more buttons than I have
>uses for. But I'll leave them so I can tell passengers--"My Gawd...Whatever
>you do, DON'T push that button!"
Would that be the one that activates the microwave heater, or the
ordinance?? ;-)
>Regards,
>Eric M. Jones
>www.PerihelionDesign.com
Message 22
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| Subject: | Re: Starter vs Master contactor |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
At 08:59 PM 9/30/2004 -0400, you wrote:
>--> AeroElectric-List message posted by: "Chris Horsten"
><airplanes@sympatico.ca>
>
>I'm just getting ready to put back the master and starter solenoids into my
>Zenith and find that I cannot tell which one is the continuous duty and
>which is the other. I have a new four terminal one I am going to use for the
>starter, and two 3 terminal ones. I can't figure out which is the continuous
>duty. Is there any way to tell?
>
>Thanks
>Chris H
>Zenair CH-300
Continuous duty contactors have a coil resistance on the order of
10-18 ohms, intermittant duty contactors have coil resistance
on the order of 3-5 ohms.
Bob . . .
---
Message 23
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| Subject: | Re: NAV bulkhead fittings |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
At 04:28 PM 9/30/2004 -0700, you wrote:
>--> AeroElectric-List message posted by: "Mickey Billings" <mbilli@cox.net>
>
>Bob our NAV antenna is located in the wing tip of our RV7. I would like to
>know if I can use a BNC bulkhead fitting at the tip rib and another one at
>the wing attach point without signal loss. The reasoning behind this is
>ease of accessibility when removing the wing or wing tip. As always, thanks
>in advance for the help.
>
>Mickey Billings
>N445BH RV7
there is no such thing as a zero loss connector or coax. however,
adding connectors as you've described will not affect performance
in any way you'll be able to perceive as a pilot.
Bob . . .
---
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