Today's Message Index:
----------------------
1. 10:28 AM - Circuit To Combine Mag P-Lead For RPM Measurements (Matt Dralle)
2. 10:45 AM - Re: Circuit To Combine Mag P-Lead For RPM Measurements (Rene Felker)
3. 02:14 PM - Re: RV-List: Circuit To Combine Mag P-Lead For RPM Measurements (Skylor Piper)
4. 03:24 PM - Re: Circuit To Combine Mag P-Lead For RPM Measurements (McGann, Ron)
5. 07:00 PM - Re: Circuit To Combine Mag P-Lead For RPM Measurements (Condrey, Bob (US SSA))
6. 09:38 PM - First Engine Start - Lycoming IO-390 Purrrrrzzz! (Matt Dralle)
Message 1
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| Subject: | Circuit To Combine Mag P-Lead For RPM Measurements |
Has anyone found a device or circuit to pick off the output from the P leads on
the left and right mags for feeding to an RPM measuring device such as the GRT
EIS-4000? The EIS-4000 only has a single RPM input. The installation manual
suggests installing a SPDT switch between the left/right mags and then to the
input on the EIS-4000 for manually switching between the mags during drop testing.
But that's pretty hoekey. Seems like someone should have come up with
a simple prioritized switching circuit that would, say, always read the left
mag p lead unless there wasn't a signal, then read the right mag P lead output.
In my "spare time" maybe I'll make one if there isn't something already out
there like this.
I thought that once upon a time I saw an electronic gizmo you could screw into
the standard tack drive that would give an electronic output. Anyone have a line
on this device and whether its compatible with the GRT EIS?
Thanks!!
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
Status: Final Bits/Inspection/Test Flight
Message 2
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| Subject: | Circuit To Combine Mag P-Lead For RPM Measurements |
I use the switch. But I think Vans sells the tack drive unit.
1 plus for the switch.
>From a raw data point of view, the switch is better since you are looking at
each mag in isolation.
Rene
801-721-6080
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Matt Dralle
Sent: Sunday, April 11, 2010 11:26 AM
rv10-list@matronics.com
Subject: RV10-List: Circuit To Combine Mag P-Lead For RPM Measurements
Has anyone found a device or circuit to pick off the output from the P leads
on the left and right mags for feeding to an RPM measuring device such as
the GRT EIS-4000? The EIS-4000 only has a single RPM input. The
installation manual suggests installing a SPDT switch between the left/right
mags and then to the input on the EIS-4000 for manually switching between
the mags during drop testing. But that's pretty hoekey. Seems like someone
should have come up with a simple prioritized switching circuit that would,
say, always read the left mag p lead unless there wasn't a signal, then read
the right mag P lead output. In my "spare time" maybe I'll make one if
there isn't something already out there like this.
I thought that once upon a time I saw an electronic gizmo you could screw
into the standard tack drive that would give an electronic output. Anyone
have a line on this device and whether its compatible with the GRT EIS?
Thanks!!
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
Status: Final Bits/Inspection/Test Flight
Message 3
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| Subject: | Re: RV-List: Circuit To Combine Mag P-Lead For RPM Measurements |
Matt,
You may recall that I provided a suggestion of using a Westach inductive sender
when you asked this question on the GRT yahoo group over a year ago:
http://groups.yahoo.com/group/GRT_EFIS/message/6872
Skylor
Sent from my iPhone.
On Apr 11, 2010, at 10:26 AM, Matt Dralle <dralle@matronics.com> wrote:
--> RV-List message posted by: Matt Dralle <dralle@matronics.com>
Has anyone found a device or circuit to pick off the output from the P leads on
the left and right mags for feeding to an RPM measuring device such as the GRT
EIS-4000? The EIS-4000 only has a single RPM input. The installation manual
suggests installing a SPDT switch between the left/right mags and then to the
input on the EIS-4000 for manually switching between the mags during drop testing.
But that's pretty hoekey. Seems like someone should have come up with
a simple prioritized switching circuit that would, say, always read the left
mag p lead unless there wasn't a signal, then read the right mag P lead output.
In my "spare time" maybe I'll make one if there isn't something already out
there like this.
I thought that once upon a time I saw an electronic gizmo you could screw into
the standard tack drive that would give an electronic output. Anyone have a line
on this device and whether its compatible with the GRT EIS?
Thanks!!
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
Status: Final Bits/Inspection/Test Flight
Message 4
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| Subject: | Circuit To Combine Mag P-Lead For RPM Measurements |
I'm with Rene. The switch is simple and works fine. Any electrickery needs to
consider that one of the mags may be grounded during start.
Cheers
Ron
VH-XRM flying in Oz
-----Original Message-----
From: owner-rv10-list-server@matronics.com [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Rene Felker
Sent: Monday, 12 April 2010 3:44 AM
Subject: RE: RV10-List: Circuit To Combine Mag P-Lead For RPM Measurements
I use the switch. But I think Vans sells the tack drive unit.
1 plus for the switch.
>From a raw data point of view, the switch is better since you are looking at
each mag in isolation.
Rene
801-721-6080
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Matt Dralle
Sent: Sunday, April 11, 2010 11:26 AM
rv10-list@matronics.com
Subject: RV10-List: Circuit To Combine Mag P-Lead For RPM Measurements
Has anyone found a device or circuit to pick off the output from the P leads
on the left and right mags for feeding to an RPM measuring device such as
the GRT EIS-4000? The EIS-4000 only has a single RPM input. The
installation manual suggests installing a SPDT switch between the left/right
mags and then to the input on the EIS-4000 for manually switching between
the mags during drop testing. But that's pretty hoekey. Seems like someone
should have come up with a simple prioritized switching circuit that would,
say, always read the left mag p lead unless there wasn't a signal, then read
the right mag P lead output. In my "spare time" maybe I'll make one if
there isn't something already out there like this.
I thought that once upon a time I saw an electronic gizmo you could screw
into the standard tack drive that would give an electronic output. Anyone
have a line on this device and whether its compatible with the GRT EIS?
Thanks!!
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
Status: Final Bits/Inspection/Test Flight
Message 5
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| Subject: | Circuit To Combine Mag P-Lead For RPM Measurements |
Matt,
You might check with GRT - I've heard that the newer versions of the EIS now come
with 2 tach inputs. Might be an upgrade available.
Bob
RV-10 N442PM
-----Original Message-----
From: owner-rv10-list-server@matronics.com [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Matt Dralle
Sent: Sunday, April 11, 2010 12:26 PM
Subject: RV10-List: Circuit To Combine Mag P-Lead For RPM Measurements
Has anyone found a device or circuit to pick off the output from the P leads on
the left and right mags for feeding to an RPM measuring device such as the GRT
EIS-4000? The EIS-4000 only has a single RPM input. The installation manual
suggests installing a SPDT switch between the left/right mags and then to the
input on the EIS-4000 for manually switching between the mags during drop testing.
But that's pretty hoekey. Seems like someone should have come up with
a simple prioritized switching circuit that would, say, always read the left
mag p lead unless there wasn't a signal, then read the right mag P lead output.
In my "spare time" maybe I'll make one if there isn't something already out
there like this.
I thought that once upon a time I saw an electronic gizmo you could screw into
the standard tack drive that would give an electronic output. Anyone have a line
on this device and whether its compatible with the GRT EIS?
Thanks!!
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
Status: Final Bits/Inspection/Test Flight
Message 6
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| Subject: | First Engine Start - Lycoming IO-390 Purrrrrzzz! |
Dear Listers,
The first start on the new Lycoming IO-390 from AeroSport went great. No
major issues to speak of. The exhaust bolts on the left rear cylinder were
a little bit loose, the hall-effect RPM sensors in the mags didn't seem to
work, and there was a small fuel leak coming from the fittings on one of
the fuel pressure transducers. Other than that, WOW! What a powerful
engine! In the video, I only got to about 1/3 throttle and it felt like it
wanted to jump off the ground! Really strong sounding and the 4-into-4
Vetterman exhaust really gives the motor a throaty sound. All of the
controls (throttle, mixture, and prop) worked as expected. Cycling the
prop pitch worked great. Fuel flow was good and I tested feeds from both
the left and right tanks. The left and right mags also checked out good as
did the kill switch. AeroSport bench ran the engine for 11.5 hours at my
request. This should get me well past the critical breakin period. The
ease at which it started attests to that as well.
Wow! That's all I've got to say! I can hardly wait to point this baby down
the runway and "get 'er done"!
In addition to the usual still-picture fair I normally attached to my log
entries, I've now added YouTube videos as well! And - they're in full
1080p HDTV resolution too! When the YouTube player comes up, in the lower
right hand corner it will say "360p" by default. Select the highest
setting that works on your computer without stuttering (480p/720p/1080p).
The HDTV versions are amazing clear. I can hardly wait to get some
air-to-air shots.
The cameras are Sony HDR-CX550V and HDR-XR550V units and sport 64GB of flash
and a 240GB hard drive respectively. They record in full 1080 HD and Dolby
digital 5.1 surround sound. I have the HDR-CX550V mounted on a head rest
mount on the back of the pilot's seat and the HDR-XR550V is used for tripod
or hand held action capture. The head rest mount is a little too low to
see over my shoulder and I've got an extension ordered that should lift it
well over the obstruction. I edited the various clips down using Adobe
Premiere CS4, which is very nice, btw.
HDTV Videos (Select the 480p, 720p, or 1080p HD Quality Versions!)
First Engine Start
http://www.youtube.com/watch?v=QK-dIxL9aJ8
Testing Fuel Flow Sender
http://www.youtube.com/watch?v=x5NWP9W8pko
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Blog
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