Today's Message Index:
----------------------
1. 06:27 AM - Re: Dan's Jabiru 3300 Wiring Schematic (user9253)
2. 07:42 AM - Re: Re: Dan's Jabiru 3300 Wiring Schematic (Ken)
3. 08:59 AM - Re: Dan's Jabiru 3300 Wiring Schematic (user9253)
4. 10:14 AM - Re: Collins 350A (Ron Quillin)
5. 10:49 AM - Re: Collins 350A (BobsV35B@aol.com)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Dan's Jabiru 3300 Wiring Schematic |
Ok Dan, You convinced me that your start circuit is simple enough to operate,
even for someone with CRS. The cost of switches is probably about the same whether
one uses 2 expensive DP3T switches or 3 inexpensive SPST switches. Using
2 switches saves panel space if that is an issue. I do not know if there are
any regulations requiring switch functions to be labeled. Good job figuring
out the wiring of switches to accomplish your goal.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=259168#259168
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: Dan's Jabiru 3300 Wiring Schematic |
Starting will work well.
But if one likes to do checks by feel (such as at night or when looking
for traffic) it complicates things as confirming a switch is up might
activate the starter.
In daytime, the position of some switches is not obvious by looking
which is further complicated by the human tendancy to see what they
expect to see. A separate starter switch has some advantages.
Ken
user9253 wrote:
>
> Ok Dan, You convinced me that your start circuit is simple enough to operate,
even for someone with CRS. The cost of switches is probably about the same
whether one uses 2 expensive DP3T switches or 3 inexpensive SPST switches. Using
2 switches saves panel space if that is an issue. I do not know if there
are any regulations requiring switch functions to be labeled. Good job figuring
out the wiring of switches to accomplish your goal.
> Joe
>
> --------
> Joe Gores
>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Dan's Jabiru 3300 Wiring Schematic |
Ken,
I agree that a separate starter switch (perhaps in series with mag switches) is
safer. Whether on the ground or in the air, inadvertent operation of the starter
is not desired. But it could be done by a new owner or a mechanic or even
a kid.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=259180#259180
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: Collins 350A |
At 11:28 8/22/2009, you wrote:
>This is more avionics then electric but a question anyway.
>
>Wiring a Garmin 300 xl to a collins ind 350-A indicator. The
>Garmin does not provide a resolver H output.
>
>What is the function pf resolver H ( or any of the other Resolvers)?
>Is it necessary in this setting?
>
>Jim Timoney
And likely may get a better answer there as well, but here goes...
Resolvers, generally associated with NAV and VOR's, most commonly
have a six wire interface. Rotor connections A & C are fed a 30Hz
reference signal and stator sin and cos connections D & E and F & G
are connected to phase detectors in the receiver to resolve the
difference between the reference and received, based on position
relative to a VOR station, signal.
For a heading system, perhaps with a remote flux gate, some similar
sounding connections exist. There is again a rotor with H & C
connections, and a stator with three, 120 deg spaced windings labeled X, Y & Z.
Notice the similarity with the rotor; A & C vs. H & C. Where C is
generally a common, and perhaps at ground potential, and the A and H
connections are 'hot'. There seems to be a tendency not to
differentiate in labeling between the A & H signals, and in both
cases, heading system and VOR resolver, to call hot signal connection "H".
Some GPS navigators incorporate the capability for an OBS like mode
where a course can be defined as a 'radial' to or from an active
waypoint; in a manner analogous to a radial to or from a VOR
station. For this feature to function, a NAV, VOR or HSI head with
OBS setting capability must be connected to the navigator. Minimally
this will require four connections, a common connection, stator 'hot'
sin and cos signals D & F and a rotor 'hot' connection A or H,
depending on how the manufacturer has chosen to label the rotor hot signal.
Hope this helps...
Ron Q.
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Collins 350A |
Good Morning Jim and Ron,
While all such electronic discussions are over my head, I do have a Garmin
300XL mounted in my Stearman without using a resolver. I doubt if I could
get the FAA to certificate it for IFR the way I have it, but I can do all of
the IFR functions. With a blanket over my head and a safety pilot in the
front pit, I have shot all of the GPS approaches in our area.
The resolver was one of the very stupid requirements forced on the industry
by one particular FAA inspector who was in charge of all GPS approvals. He
wanted all GPSs to work just like a VOR and he insisted that a resolver be
used. Trimble, Apollo, and Northstar realized the absurdity of the
situation and fought the good fight to not have a resolver.
Garmin caved in as did King. They got their boxes approved a full year
before Trimble, Apollo, and Northstar.
I still think the Trimble was the best of the lot and the Northstar was a
close second, but by caving in to that one FAA inspector, Garmin got a major
jump on the competition and we see who is left. Trimble and Northstar
managed to get that inspector replaced, but they still lost the war!
In any case, you really do not need the resolver function to use all the
capabilities of the 300XL. It takes a bit more understanding of the system,
but it is not hard at all.
Incidentally, if you are flying a 430 or a 530 and just ignore the message
that tells you to set in the course. The set will still do everything it
needs to do. The resolver is not needed with either of those sets to get the
job done. It is just a carry over from one misguided FAA inspector.
The only disadvantage of not setting in the course is when you are using
an HSI.
If you don't set in the correct course, the HSI picture will look funny.
Still works fine, just looks different. Not having to have the resolver saved
over one thousand 1994 dollars in every installation.
As you can tell this is a VERY sore subject with me<G>!
Happy Skies,
Old Bob
Stearman N3977A
Brookeridge Air Park LL22
In a message dated 8/23/2009 12:15:19 P.M. Central Daylight Time,
rjquillin@gmail.com writes:
At 11:28 8/22/2009, you wrote:
This is more avionics then electric but a question anyway.
Wiring a Garmin 300 xl to a collins ind 350-A indicator. The Garmin does
not provide a resolver H output.
What is the function pf resolver H ( or any of the other Resolvers)?
Is it necessary in this setting?
Jim Timoney
And likely may get a better answer there as well, but here goes...
Resolvers, generally associated with NAV and VOR's, most commonly have a
six wire interface. Rotor connections A & C are fed a 30Hz reference signal
and stator sin and cos connections D & E and F & G are connected to phase
detectors in the receiver to resolve the difference between the reference
and received, based on position relative to a VOR station, signal.
For a heading system, perhaps with a remote flux gate, some similar
sounding connections exist. There is again a rotor with H & C connections, and
a
stator with three, 120 deg spaced windings labeled X, Y & Z.
Notice the similarity with the rotor; A & C vs. H & C. Where C is
generally a common, and perhaps at ground potential, and the A and H connections
are 'hot'. There seems to be a tendency not to differentiate in labeling
between the A & H signals, and in both cases, heading system and VOR
resolver, to call hot signal connection "H".
Some GPS navigators incorporate the capability for an OBS like mode where
a course can be defined as a 'radial' to or from an active waypoint; in a
manner analogous to a radial to or from a VOR station. For this feature to
function, a NAV, VOR or HSI head with OBS setting capability must be
connected to the navigator. Minimally this will require four connections, a
common connection, stator 'hot' sin and cos signals D & F and a rotor 'hot'
connection A or H, depending on how the manufacturer has chosen to label the
rotor hot signal.
Hope this helps...
Ron Q.
(http://www.matronics.com/Navigator?AeroElectric-List)
(http://www.matronics.com/contribution)
**************A Good Credit Score is 700 or Above. See yours in just 2 easy
steps!
=JulystepsfooterNO115)
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! --
|