Today's Message Index:
----------------------
1. 04:29 AM - Re: Alternator Position (Robert L. Nuckolls, III)
2. 04:29 AM - Re: Alternator Position (racerjerry)
3. 07:04 AM - Re: Re: Alternator Position (Michael Orth)
4. 07:05 AM - Re: Alternator Position (Michael Orth)
5. 09:34 AM - Re: Re: Alternator Position (Robert L. Nuckolls, III)
6. 11:37 AM - Re: Active VOR antenna (highwire)
7. 12:12 PM - Re: Re: Active VOR antenna ()
8. 05:34 PM - Coax cable (Sam Marlow)
Message 1
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| Subject: | Re: Alternator Position |
At 12:28 2015-05-08, you wrote:
>
>Hi Bob,
>
>Just got off the telephone with Neal George from Continental.
>Neal is a very nice and knowledgeable man who is also very easy to talk to.
>
>With regard to how the generator may become "vertical" as opposed to
>its current horizontal orientation, it is moving to an M-14 from a
>Continental IO-470-L.
>In the process, it will also become gear-driven rather than belt-driven.
>
>Neal agreed with you that the perpendicular force vector. . .the
>force applied on the armature perpendicular to the axis of rotation
>by the drive belt. . .would be lessened with a gear-driven installation.
>Neal also agreed that the physical orientation of the generator
>should have no effect on its mechanical life.
>
>Thanks to both you and Neal for your help,
Michael, Understand. Be aware too that
B&C has a PM alternator . . . a 3-phase
20-30 amp class that fits one or more
Russian round engines. I'm not familiar
with details. Should the generator mod
become problematic, check with B&C for
options.
Bob . . .
Message 2
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| Subject: | Re: Alternator Position |
As Bob says, most ball bearings still have significant performance for thrust as
well as axial loads. After installation, check for bearing noise using a stethoscope
(cheap rod in ear type). Compare it with noise from the upper bearing.
Afterward, occasionally listen for increased noise (growling or clicking)
at the lower bearing.
If problems arise with the lower bearing, substitute an Angular Contact Bearing
which is designed to better accept both radial and thrust loads. Fafnir 7000
series comes to mind. Any good bearing supply house should be able to help.
Remember that angular contact bearings are directional and are designed for
thrust load in one direction only. If you view the bearing, one side will have
less spacing between races; that is the side which will accept increased thrust
loads.
--------
Jerry King
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=441923#441923
Message 3
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| Subject: | Re: Alternator Position |
Thanks Jerry.
Good information.
Michael
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-----Original Message-----
From: racerjerry
Sent: Saturday, May 9, 2015 4:28 AM
Subject: AeroElectric-List: Re: Alternator Position
As Bob says, most ball bearings still have significant performance for
thrust as well as axial loads. After installation, check for bearing noise
using a stethoscope (cheap rod in ear type). Compare it with noise from the
upper bearing. Afterward, occasionally listen for increased noise
(growling or clicking) at the lower bearing.
If problems arise with the lower bearing, substitute an Angular Contact
Bearing which is designed to better accept both radial and thrust loads.
Fafnir 7000 series comes to mind. Any good bearing supply house should be
able to help. Remember that angular contact bearings are directional and
are designed for thrust load in one direction only. If you view the
bearing, one side will have less spacing between races; that is the side
which will accept increased thrust loads.
--------
Jerry King
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=441923#441923
-----
No virus found in this message.
Checked by AVG - www.avg.com
Message 4
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| Subject: | Re: Alternator Position |
Good Morning Bob,
Thanks for the B & C steer.
Michael
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-----Original Message-----
From: Robert L. Nuckolls, III
Sent: Saturday, May 9, 2015 4:27 AM
Subject: Re: AeroElectric-List: Alternator Position
<nuckolls.bob@aeroelectric.com>
At 12:28 2015-05-08, you wrote:
><mosurf@xplornet.com>
>
>Hi Bob,
>
>Just got off the telephone with Neal George from Continental.
>Neal is a very nice and knowledgeable man who is also very easy to talk to.
>
>With regard to how the generator may become "vertical" as opposed to its
>current horizontal orientation, it is moving to an M-14 from a Continental
>IO-470-L.
>In the process, it will also become gear-driven rather than belt-driven.
>
>Neal agreed with you that the perpendicular force vector. . .the force
>applied on the armature perpendicular to the axis of rotation by the drive
>belt. . .would be lessened with a gear-driven installation.
>Neal also agreed that the physical orientation of the generator should have
>no effect on its mechanical life.
>
>Thanks to both you and Neal for your help,
Michael, Understand. Be aware too that
B&C has a PM alternator . . . a 3-phase
20-30 amp class that fits one or more
Russian round engines. I'm not familiar
with details. Should the generator mod
become problematic, check with B&C for
options.
Bob . . .
-----
No virus found in this message.
Checked by AVG - www.avg.com
Message 5
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| Subject: | Re: Alternator Position |
Fafnir 7000 series comes to mind. Any good bearing supply house
should be able to help. Remember that angular contact bearings are
directional and are designed for thrust load in one direction
only. If you view the bearing, one side will have less spacing
between races; that is the side which will accept increased thrust loads.
Was not aware of that product . . . good
data . . . thanks! Much of what I've learned
about the "other guy's" sandbox toys has
been gleaned during my participation on multi-
discipline tiger-teams assembled to sift
through the pieces. It's always nice to
pick up a knowledge nugget before the
thing falls apart!
Bob . . .
Message 6
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| Subject: | Re: Active VOR antenna |
berkut13(at)berkut13.com wrote:
> About a 24-30" run between antenna location and Garmin GTN-650 radio.
>
> I would plan a short pigtail ~4" off the end of the antenna with a female
> BNC connector. Similar with the power wire. To allow the canard to be
> removed for maintenance and inspection, connectors local to the antenna
> installation area are required.
>
> Thanks,
> -James
>
> Hi James,
>
> What are the physical sizes of the area that you have to install an antenna?
I am guessing from what has been posted, that it is a tubular space in each canard
accessible from the root. Is the canard glass and the nose of carbon? What
is the spread between the canard roots?
> I started simulating, modelling and lab testing antennas a few years age for
my own plane and my own entertainment. Your application looks like it may be
a challenge for a conventional solution, but who knows.
> Ron
>
>
> --
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=441943#441943
Message 7
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| Subject: | Re: Active VOR antenna |
A challenge, for sure.
The concept here is to retrofit an active (amplified), end fed, single
element antenna into the LE D-section of an existing canard on one side.
The canard is glass skinned and will be invisible to the antenna. However,
the center spar caps are carbon and the typical retrofit of adding a foil
"V" style antenna to the exterior of the bottom skin is not ideal. A
"dipole on a stick" was the original idea, but there is no space to get the
coax away from the elements.
The canard is solid foam core, in which a conduit was drilled out in the LE
running from the center to one tip. This will be where the antenna will be
inserted. There is a small "access box" (if you can call it that) cut in
the foam at the center of the canard where the antenna can be accessed,
however once installed and the skin in patched, it will require cutting the
fiberglass repair patch off each time. Sounds worse than it really is and
is actually less work than installing the external foil elements and trying
to re-contour the already critical profile of a small airfoil.
Fingers crossed this works!
-James
-----Original Message-----
From: highwire
Sent: Saturday, May 09, 2015 1:36 PM
Subject: AeroElectric-List: Re: Active VOR antenna
> What are the physical sizes of the area that you have to install an
> antenna? I am guessing from what has been posted, that it is a tubular
> space in each canard accessible from the root. Is the canard glass and the
> nose of carbon? What is the spread between the canard roots?
> I started simulating, modelling and lab testing antennas a few years age
> for my own plane and my own entertainment. Your application looks like it
> may be a challenge for a conventional solution, but who knows.
> Ron
Message 8
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Bob, do you still have the gold Coax for sale in pre-cut length, with
connectors?
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