Today's Message Index:
----------------------
1. 12:33 AM - Xcom 760 radio interferenceTOMMY WALKER (Vince Hallam)
2. 12:44 AM - Re: Rotax 912UL fuel flow sensor installation (Paul Mitchell)
3. 12:51 AM - Re: Rotax 912UL fuel flow sensor (Luca Bertagnolio)
4. 03:43 AM - Re: Rotax 912UL fuel flow sensor installation (george may)
5. 04:03 AM - 582 plugs up or down perf.? (river1)
6. 06:50 AM - Re: 912ULS and XCOM760 Problem (Noel Loveys)
7. 06:59 AM - Re: Rotax 912UL fuel flow sensor installation (Noel Loveys)
8. 07:08 AM - Re: RotaxEngines-List Digest: 912ULS @ XCOM760 Problem (John M. Goodings)
9. 07:52 AM - (Paul Mitchell)
10. 08:35 AM - Re: 582 plugs up or down perf.? (Roger Lee)
11. 09:52 AM - Re: 582 plugs up or down perf.? (river1)
12. 10:39 AM - Re: (Paul Kuntz)
13. 06:45 PM - Re: RotaxEngines-List Digest: 912ULS @ XCOM760 Problem (Tommy Walker)
14. 06:50 PM - Re: Xcom 760 radio interferenceTOMMY WALKER (Tommy Walker)
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: | Xcom 760 radio interferenceTOMMY WALKER |
Hi,
I dont know your Xcom 760,but I had a similar problem wth my Icom
IC A5 [a small portable handpset txrx] I got a boffin to find me a plug
in adaptor to fit my own headphones and mike. to avoid using a seperate
cable and PTT he arranged I use the PTT on the handset . the first few trips
I couldnt understand the terrible interference on my transmit and was
unreadable Eventually realised the PTT was enabling both my head mike and
my handset mike, which was picking up cockpit engine acoustic and
transmitting it at full blast
Vince Hallam
please phone rather than email for best results!
07941 313141
01803 316191
www.devonwindmills.co.uk
----- Original Message -----
From: "RotaxEngines-List Digest Server" <rotaxengines-list@matronics.com>
Sent: Friday, September 14, 2007 7:57 AM
Subject: RotaxEngines-List Digest: 9 Msgs - 09/13/07
> *
>
> =================================================
> Online Versions of Today's List Digest Archive
> =================================================
>
> Today's complete RotaxEngines-List Digest can also be found in either of
> the
> two Web Links listed below. The .html file includes the Digest formatted
> in HTML for viewing with a web browser and features Hyperlinked Indexes
> and Message Navigation. The .txt file includes the plain ASCII version
> of the RotaxEngines-List Digest and can be viewed with a generic text
> editor
> such as Notepad or with a web browser.
>
> HTML Version:
>
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 07-09-13&Archive=RotaxEngines
>
> Text Version:
>
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 07-09-13&Archive=RotaxEngines
>
>
> ===============================================
> EMail Version of Today's List Digest Archive
> ===============================================
>
>
> ----------------------------------------------------------
> RotaxEngines-List Digest Archive
> ---
> Total Messages Posted Thu 09/13/07: 9
> ----------------------------------------------------------
>
>
> Today's Message Index:
> ----------------------
>
> 1. 02:17 PM - 912ULS and XCOM760 Problem (Tommy Walker)
> 2. 03:07 PM - Installing new Rings in a 914 (Paul McAllister)
> 3. 04:37 PM - Re: 912ULS and XCOM760 Problem (Roger Lee)
> 4. 04:40 PM - Re: Installing new Rings in a 914 (Roger Lee)
> 5. 05:38 PM - Rotax 912UL fuel flow sensor installation (Paul Kuntz)
> 6. 06:38 PM - Re: Rotax 912UL fuel flow sensor installation (george
> may)
> 7. 08:06 PM - Re: 912ULS and XCOM760 Problem (James Shumaker)
> 8. 08:36 PM - Re: Rotax 912UL fuel flow sensor installation (Paul
> Kuntz)
> 9. 09:59 PM - Re: Rotax 912UL fuel flow sensor installation (paul
> wilson)
>
>
> ________________________________ Message 1
> _____________________________________
>
>
> Time: 02:17:48 PM PST US
> Subject: RotaxEngines-List: 912ULS and XCOM760 Problem
> From: "Tommy Walker" <twalker@cableone.net>
>
>
> Rotaxers,
>
> I have a problem some of you may have experienced and thought I might get
> some
> help. I've already talked with a couple of the people on this list.
>
> This will be a little long, but if you got the time to read it, you might
> be able
> to help me out.....
>
> Here goes:
>
> (copy of email sent to XCOM support)....
>
> I bought an XCOM760 from you a couple of years ago (Invoice # 807), and I
> am just
> now getting to the point of using it. I have a problem and hope that you
> can point me in the right direction.
>
> The Xcom is mounted in a Zenith 701 with Rotax 912ULS. I have the 22000
> uF capacitor
> installed and it appears to be working correctly.
>
> At engine idle, there is a slight noise entering the system when I press
> the PTT.
> When I increase RPM, the noise level increases proportionately. At RPM
> levels
> over 4000, the output seems to be so overcome by a high pitch whine that
> the message is unreadable. There is no outside noise when the PTT is not
> depressed.
> The radio receiver function works properly on all channels, just problems
> when mike button is pressed at higher RPM.
>
> Heres what Ive done:
>
> Installed a line filter just ahead of the XCOM.
>
> Isolated the headphone jacks so that they do not contact ground.
>
> Moved the 22000 uF capacitor to just in front of the XCOM in the
> electrical circuit.
>
> Tested the radio after having removed the fuses of all components except
> the tach.
>
> Substituted an antenna from a handheld transceiver for the Commant
> antenna.
>
> Removed the Commant antenna from the airplane and laid it on a plastic
> cover to
> see if it was introducing a ground loop. The noise was still present.
>
> Made up new antenna cable with suggested length of 7.9 ft.
>
> Hooked the XCOM to another battery, cranked up the 912 and again tried to
> communicate.
>
>
> None of the above reduced the noise level when the radio is used to
> communicate.
>
>
> If you have any suggestions, please let me know.
>
>
> Tommy Walker
> (End of Email)
>
> Thanks for any suggestions from the list.
>
> --------
> Tommy Walker
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=134266#134266
>
>
> ________________________________ Message 2
> _____________________________________
>
>
> Time: 03:07:52 PM PST US
> From: Paul McAllister <l_luv2_fly@yahoo.com>
> Subject: RotaxEngines-List: Installing new Rings in a 914
>
> Hi all,
>
> I purchased a 914 a year ago that had been run in a test cell for 100
> hours and
> then it sat for a couple of years.
>
> I pulled the heads to inspect for corrosion and found small amount on the
> valve
> seats so I had them re seated, however I decided since I have it in bits
> to put
> a new set of rings in it.
>
> So, after such a long winded introduction I would like to know if it is
> required
> to hone the bores so that the new rings will seat, or would I risk
> damaging
> the coating on the cylinder bores ?
>
> Thanks, Paul
>
>
> ---------------------------------
> Catch up on fall's hot new shows on Yahoo! TV. Watch previews, get
> listings, and
> more!
>
> ________________________________ Message 3
> _____________________________________
>
>
> Time: 04:37:44 PM PST US
> Subject: RotaxEngines-List: Re: 912ULS and XCOM760 Problem
> From: "Roger Lee" <ssadiver1@yahoo.com>
>
>
> Hi Tommy,
>
> WOW, a really tough one. I'm not sure what to say. Just thinking out loud
> here.
> Is the capacitor placed in line correctly? Could it just be hooked up to a
> different
> terminal? Doesn't sound like it is filtering much at all. Is there more
> than one way to hook it up?
>
> Maybe wire the radio up differently?
>
> Have you ask a radio tech on your field or in the area?
>
> I'm at a loss.
>
> --------
> Roger Lee
> Tucson, Az.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=134282#134282
>
>
> ________________________________ Message 4
> _____________________________________
>
>
> Time: 04:40:28 PM PST US
> Subject: RotaxEngines-List: Re: Installing new Rings in a 914
> From: "Roger Lee" <ssadiver1@yahoo.com>
>
>
> You can download the heavy maint. manual from the Rotax website for the
> 914 and
> it will tell you for sure.
>
> --------
> Roger Lee
> Tucson, Az.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=134284#134284
>
>
> ________________________________ Message 5
> _____________________________________
>
>
> Time: 05:38:14 PM PST US
> From: "Paul Kuntz" <paul.r.kuntz@gmail.com>
> Subject: RotaxEngines-List: Rotax 912UL fuel flow sensor installation
>
> I'm looking for advice and technical information on installation of a fuel
> flow sensor on the 912UL engine in my Pipistril Sinus motorglider.
> Pipistrel offers two potential locations -- one is in the main fuel feed
> between the gascolator and the fuel pump; the other is in a fuel line
> leading from the fuel splitter on one of the carburetors.
>
> The Pipistrel support staff notes that if the sensor is placed between the
> gascolator and the fuel pump, it will be inaccurate by the amount of fuel
> is
> being returned to the tank in the fuel return line leading out of the
> splitter. In that case, the fuel flow instrument will have to be
> "adjusted"
> by some undefined amount to account for the fuel return.
>
> The alternative, however, will measure the fuel flow to only one of the
> carburetors, so I assume the instrument will have to be adjusted to double
> the reading in that case. This assumes that such an adjustment is
> possible,
> and it also assumes that the fuel flow to the two carburetors is identical
> (although if the carburetors are balanced, that is not an unreasonable
> assumption).
>
> What are the rest of you doing?
>
> Also, the fuel flow sensor that came with my kit is a Brauniger device. I
> plan to use a Dynon FlightDek D180. Does anyone know the electrical
> output
> characteristerics of the Brauniger flow sensor, and can you confirm (or
> deny) that it is compatible with the Dynon? Do you know whether the Dynon
> allows the sort of calibration adjustments necessary to address the
> installation questions above?
>
> Thanks a lot,
> Paul Kuntz
> http://www.pipistrelbuilders.com
>
> ________________________________ Message 6
> _____________________________________
>
>
> Time: 06:38:43 PM PST US
> From: george may <gfmjr_20@hotmail.com>
> Subject: RE: RotaxEngines-List: Rotax 912UL fuel flow sensor installation
>
>
> Paul--
> I have the Dynon 180 and am using their fuel flow meter. I have it in li
> ne with the pump and just before the return line on a 912uls. I initially
> measured the fuel return to determine what correction would be necessay to
> apply. My return line has a restrictor in it so the return flow is pretty
> s
> mall. If I remember correctly, the return flow was in the vicinity of
> about
> 13-15 onces per hour. This is a pretty small value considering that you wi
> ll be burning about 5 gallons per hour. I have a 24 gallon capacity, about
> 4 hours cruise, the returned fuel is a very minor issue. After 150hours
> on
> the plane, I basically just disregard the return flow.
> So, a long winded way of saying go with the placement of the fuel flow i
> n line with the gascolator and pump.
>
> Good luck
> George May
> 601XL 912s 150 hours
>
>
> ngines-list@matronics.comSubject: RotaxEngines-List: Rotax 912UL fuel flow
> sensor installation
> I'm looking for advice and technical information on installation of a fuel
> flow sensor on the 912UL engine in my Pipistril Sinus motorglider.
> Pipistr
> el offers two potential locations -- one is in the main fuel feed between
> t
> he gascolator and the fuel pump; the other is in a fuel line leading from
> t
> he fuel splitter on one of the carburetors.
>
> The Pipistrel support staff notes that if the sensor is placed between the
> gascolator and the fuel pump, it will be inaccurate by the amount of fuel
> i
> s being returned to the tank in the fuel return line leading out of the
> spl
> itter. In that case, the fuel flow instrument will have to be "adjusted"
> b
> y some undefined amount to account for the fuel return.
>
> The alternative, however, will measure the fuel flow to only one of the
> car
> buretors, so I assume the instrument will have to be adjusted to double
> the
> reading in that case. This assumes that such an adjustment is possible, a
> nd it also assumes that the fuel flow to the two carburetors is identical
> (
> although if the carburetors are balanced, that is not an unreasonable
> assum
> ption).
>
> What are the rest of you doing?
>
> Also, the fuel flow sensor that came with my kit is a Brauniger device. I
> plan to use a Dynon FlightDek D180. Does anyone know the electrical
> output
> characteristerics of the Brauniger flow sensor, and can you confirm (or de
> ny) that it is compatible with the Dynon? Do you know whether the Dynon
> al
> lows the sort of calibration adjustments necessary to address the
> installat
> ion questions above?
>
> Thanks a lot,
> Paul Kuntz
> http://www.pipistrelbuilders.com
>
>
> _________________________________________________________________
> Capture your memories in an online journal!
> http://www.reallivemoms.com?ocid=TXT_TAGHM&loc=us
>
> ________________________________ Message 7
> _____________________________________
>
>
> Time: 08:06:14 PM PST US
> From: James Shumaker <jimshumaker@sbcglobal.net>
> Subject: Re: RotaxEngines-List: 912ULS and XCOM760 Problem
>
> Tommy=0A=0AOne of the kitfox pilots reported similar symptoms and his
> solut
> ion was to run a dedicated ground from the voltage regulator frame to a
> gro
> und point on the frame. =0A=0AJim Shumaker=0A=0A=0A----- Original Message
> ----=0AFrom: Tommy Walker <twalker@cableone.net>=0ATo:
> rotaxengines-list@ma
> tronics.com=0ASent: Thursday, September 13, 2007 2:15:18 PM=0ASubject:
> Rota
> xEngines-List: 912ULS and XCOM760 Problem=0A=0A=0A--> RotaxEngines-List
> mes
> sage posted by: "Tommy Walker"
> <twalker@cableone.net>=0A=0ARotaxers,=0A=0AI
> have a problem some of you may have experienced and thought I might get so
> me help. I've already talked with a couple of the people on this list.=0A
> =0AThis will be a little long, but if you got the time to read it, you
> migh
> t be able to help me out.....=0A=0AHere goes:=0A=0A(copy of email sent to
> X
> COM support)....=0A=0AI bought an XCOM760 from you a couple of years ago
> (I
> nvoice # 807), and I am just now getting to the point of using it. I
> have
> a problem and hope that you can point me in the right direction.=0A=0AThe
> Xcom is mounted in a Zenith 701 with Rotax 912ULS. I have the 22000 uF
> cap
> acitor installed and it appears to be working correctly. =0A=0AAt engine
> id
> le, there is a slight noise entering the system when I press the PTT.
> When
> I increase RPM, the noise level increases proportionately. At RPM levels
> over 4000, the output seems to be so overcome by a high pitch whine that t
> he message is unreadable. There is no outside noise when the PTT is not
> de
> pressed. The radio receiver function works properly on all channels, just
> problems when mike button is pressed at higher RPM.=0A=0AHere=99s wha
> t I=99ve done:=0A=0AInstalled a line filter just ahead of the XCOM.
> =0A=0AIsolated the headphone jacks so that they do not contact ground.
> =0A
> =0AMoved the 22000 uF capacitor to just in front of the XCOM in the
> electri
> cal circuit.=0A=0ATested the radio after having removed the fuses of all
> co
> mponents except the tach.=0A=0ASubstituted an antenna from a handheld
> trans
> ceiver for the Commant antenna. =0A=0ARemoved the Commant antenna from
> the
> airplane and laid it on a plastic cover to see if it was introducing a gr
> ound loop. The noise was still present.=0A=0AMade up new antenna cable
> wit
> h suggested length of 7.9 ft.=0A=0AHooked the XCOM to another battery,
> cran
> ked up the 912 and again tried to communicate. =0A=0ANone of the above
> red
> uced the noise level when the radio is used to communicate. =0A=0AIf you
> h
> ave any suggestions, please let me know.=0A=0A=0ATommy Walker=0A(End of
> Ema
> il)=0A=0AThanks for any suggestions from the list.=0A=0A--------=0ATommy
> Wa
> lker=0A=0A=0A=0A=0ARead this topic online
> here:=0A=0Ahttp://forums.matronic
> ======================
>
> ________________________________ Message 8
> _____________________________________
>
>
> Time: 08:36:01 PM PST US
> From: "Paul Kuntz" <paul.r.kuntz@gmail.com>
> Subject: Re: RotaxEngines-List: Rotax 912UL fuel flow sensor installation
>
> Thanks, George. That sounds reasonable. I assume that the Dynon does
> have some means of calibrating the fuel flow readings -- true?
>
> Regards,
> Paul Kuntz
> ----- Original Message -----
> From: george may
> To: rotaxengines-list@matronics.com
> Sent: Thursday, September 13, 2007 6:37 PM
> Subject: RE: RotaxEngines-List: Rotax 912UL fuel flow sensor
> installation
>
>
> Paul--
> I have the Dynon 180 and am using their fuel flow meter. I have it
> in line with the pump and just before the return line on a 912uls. I
> initially measured the fuel return to determine what correction would be
> necessay to apply. My return line has a restrictor in it so the return
> flow is pretty small. If I remember correctly, the return flow was in
> the vicinity of about 13-15 onces per hour. This is a pretty small value
> considering that you will be burning about 5 gallons per hour. I have a
> 24 gallon capacity, about 4 hours cruise, the returned fuel is a very
> minor issue. After 150hours on the plane, I basically just disregard
> the return flow.
> So, a long winded way of saying go with the placement of the fuel
> flow in line with the gascolator and pump.
>
> Good luck
> George May
> 601XL 912s 150 hours
>
>
> -------------------------------------------------------------------------
> ---
> Date: Thu, 13 Sep 2007 17:37:37 -0700
> From: paul.r.kuntz@gmail.com
> To: rotaxengines-list@matronics.com
> Subject: RotaxEngines-List: Rotax 912UL fuel flow sensor
> installation
>
>
> I'm looking for advice and technical information on installation of
> a fuel flow sensor on the 912UL engine in my Pipistril Sinus
> motorglider. Pipistrel offers two potential locations -- one is in the
> main fuel feed between the gascolator and the fuel pump; the other is in
> a fuel line leading from the fuel splitter on one of the carburetors.
>
> The Pipistrel support staff notes that if the sensor is placed
> between the gascolator and the fuel pump, it will be inaccurate by the
> amount of fuel is being returned to the tank in the fuel return line
> leading out of the splitter. In that case, the fuel flow instrument
> will have to be "adjusted" by some undefined amount to account for the
> fuel return.
>
> The alternative, however, will measure the fuel flow to only one of
> the carburetors, so I assume the instrument will have to be adjusted to
> double the reading in that case. This assumes that such an adjustment
> is possible, and it also assumes that the fuel flow to the two
> carburetors is identical (although if the carburetors are balanced, that
> is not an unreasonable assumption).
>
> What are the rest of you doing?
>
> Also, the fuel flow sensor that came with my kit is a Brauniger
> device. I plan to use a Dynon FlightDek D180. Does anyone know the
> electrical output characteristerics of the Brauniger flow sensor, and
> can you confirm (or deny) that it is compatible with the Dynon? Do you
> know whether the Dynon allows the sort of calibration adjustments
> necessary to address the installation questions above?
>
> Thanks a lot,
> Paul Kuntz
> http://www.pipistrelbuilders.com
>
>
> ist"
> target=_blank>http://www.matronics.com/Navigator?RotaxEngines-List
> p://forums.matronics.com
>
>
> -------------------------------------------------------------------------
> -----
> Make your little one a shining star! Shine on!
>
>
> ________________________________ Message 9
> _____________________________________
>
>
> Time: 09:59:32 PM PST US
> From: paul wilson <pwmac@sisna.com>
> Subject: RE: RotaxEngines-List: Rotax 912UL fuel flow sensor
> installation
>
> Matronics the host for this list sells a gadget that allows 2 sensors
> and subtracts them for precise flow measurements.
> PW
> =============
> At 07:37 PM 9/13/2007, you wrote:
>>Paul--
>> I have the Dynon 180 and am using their fuel flow meter. I have
>> it in line with the pump and just before the return line on a
>> 912uls. I initially measured the fuel return to determine what
>> correction would be necessay to apply. My return line has a
>> restrictor in it so the return flow is pretty small. If I remember
>> correctly, the return flow was in the vicinity of about 13-15 onces
>> per hour. This is a pretty small value considering that you will be
>> burning about 5 gallons per hour. I have a 24 gallon capacity,
>> about 4 hours cruise, the returned fuel is a very minor
>> issue. After 150hours on the plane, I basically just disregard the
>> return flow.
>> So, a long winded way of saying go with the placement of the
>> fuel flow in line with the gascolator and pump.
>>
>>Good luck
>>George May
>>601XL 912s 150 hours
>>
>>
>>----------
>>Date: Thu, 13 Sep 2007 17:37:37 -0700
>>From: paul.r.kuntz@gmail.com
>>To: rotaxengines-list@matronics.com
>>Subject: RotaxEngines-List: Rotax 912UL fuel flow sensor installation
>>
>>I'm looking for advice and technical information on installation of
>>a fuel flow sensor on the 912UL engine in my Pipistril Sinus
>>motorglider. Pipistrel offers two potential locations -- one is in
>>the main fuel feed between the gascolator and the fuel pump; the
>>other is in a fuel line leading from the fuel splitter on one of the
>>carburetors.
>>
>>The Pipistrel support staff notes that if the sensor is placed
>>between the gascolator and the fuel pump, it will be inaccurate by
>>the amount of fuel is being returned to the tank in the fuel return
>>line leading out of the splitter. In that case, the fuel flow
>>instrument will have to be "adjusted" by some undefined amount to
>>account for the fuel return.
>>
>>The alternative, however, will measure the fuel flow to only one of
>>the carburetors, so I assume the instrument will have to be adjusted
>>to double the reading in that case. This assumes that such an
>>adjustment is possible, and it also assumes that the fuel flow to
>>the two carburetors is identical (although if the carburetors are
>>balanced, that is not an unreasonable assumption).
>>
>>What are the rest of you doing?
>>
>>Also, the fuel flow sensor that came with my kit is a Brauniger
>>device. I plan to use a Dynon FlightDek D180. Does anyone know the
>>electrical output characteristerics of the Brauniger flow sensor,
>>and can you confirm (or deny) that it is compatible with the
>>Dynon? Do you know whether the Dynon allows the sort of calibration
>>adjustments necessary to address the installation questions above?
>>
>>Thanks a lot,
>>Paul Kuntz
>><http://www.pipistrelbuilders.com/>http://www.pipistrelbuilders.com
>>
>>
>>ist" target=_blank>http://www.matronics.com/Navigator?RotaxEngines-List
>>
>>p://forums.matronics.com
>>
>>
>>----------
>>Make your little one a shining star!
>><http://www.reallivemoms.com?ocid=TXT_TAGHM&loc=us>Shine on!
>
>
>
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: Rotax 912UL fuel flow sensor installation |
Paul,
I have a Tecnam Sierra with a Dynon D10 engine monitor with the Flowscan
201 sensor which is mounted in the fuel line AFTER the "return to tank
bleed" and before the lines split to each carburettor so it only reads
fuel actually being used by both . Works fine and I believe very
accurate.
Paul Mitchell
----- Original Message -----
From: Paul Kuntz
To: rotaxengines-list@matronics.com
Sent: Friday, September 14, 2007 1:37 AM
Subject: RotaxEngines-List: Rotax 912UL fuel flow sensor installation
I'm looking for advice and technical information on installation of a
fuel flow sensor on the 912UL engine in my Pipistril Sinus motorglider.
Pipistrel offers two potential locations -- one is in the main fuel feed
between the gascolator and the fuel pump; the other is in a fuel line
leading from the fuel splitter on one of the carburetors.
The Pipistrel support staff notes that if the sensor is placed between
the gascolator and the fuel pump, it will be inaccurate by the amount of
fuel is being returned to the tank in the fuel return line leading out
of the splitter. In that case, the fuel flow instrument will have to be
"adjusted" by some undefined amount to account for the fuel return.
The alternative, however, will measure the fuel flow to only one of
the carburetors, so I assume the instrument will have to be adjusted to
double the reading in that case. This assumes that such an adjustment
is possible, and it also assumes that the fuel flow to the two
carburetors is identical (although if the carburetors are balanced, that
is not an unreasonable assumption).
What are the rest of you doing?
Also, the fuel flow sensor that came with my kit is a Brauniger
device. I plan to use a Dynon FlightDek D180. Does anyone know the
electrical output characteristerics of the Brauniger flow sensor, and
can you confirm (or deny) that it is compatible with the Dynon? Do you
know whether the Dynon allows the sort of calibration adjustments
necessary to address the installation questions above?
Thanks a lot,
Paul Kuntz
http://www.pipistrelbuilders.com
-------------------------------------------------------------------------
-----
9/13/2007 11:45 AM
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: Rotax 912UL fuel flow sensor |
Paul,
I am a happy owner of a Pipistrel Virus, and had the same exact question some time
ago. I posted a message on the Dynon forum, and think that it might be interesting
for you to read:
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1165011860
I have yet to implement it, but I believe that the new splitter is the better way
to go. I don't like the idea of fitting two senders and the Matronics unit,
more parts, more points of failure, more money...
I have not spoken to Ivo about the possibility of fitting this modification on
my Virus, but I am starting to think about replacing the Brauniger in favour of
a Dynon D180 sometimes in the winter, so this might be a good time to plan on
this.
Ciao, Luca
Rome, Italy
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: | Rotax 912UL fuel flow sensor installation |
Yup. It's pretty straight forward. Takes about 5 minutes
From: paul.r.kuntz@gmail.comTo: rotaxengines-list@matronics.comSubject: Re:
RotaxEngines-List: Rotax 912UL fuel flow sensor installationDate: Thu, 13
Sep 2007 20:34:41 -0700
Thanks, George. That sounds reasonable. I assume that the Dynon does have
some means of calibrating the fuel flow readings -- true?
Regards,
Paul Kuntz
----- Original Message -----
From: george may
Sent: Thursday, September 13, 2007 6:37 PM
Subject: RE: RotaxEngines-List: Rotax 912UL fuel flow sensor installation
Paul-- I have the Dynon 180 and am using their fuel flow meter. I have it
in line with the pump and just before the return line on a 912uls. I init
ially measured the fuel return to determine what correction would be necess
ay to apply. My return line has a restrictor in it so the return flow is pr
etty small. If I remember correctly, the return flow was in the vicinity of
about 13-15 onces per hour. This is a pretty small value considering that
you will be burning about 5 gallons per hour. I have a 24 gallon capacity,
about 4 hours cruise, the returned fuel is a very minor issue. After 150ho
urs on the plane, I basically just disregard the return flow. So, a long
winded way of saying go with the placement of the fuel flow in line with th
e gascolator and pump. Good luckGeorge May601XL 912s 150 hours
ngines-list@matronics.comSubject: RotaxEngines-List: Rotax 912UL fuel flow
sensor installation
I'm looking for advice and technical information on installation of a fuel
flow sensor on the 912UL engine in my Pipistril Sinus motorglider. Pipistr
el offers two potential locations -- one is in the main fuel feed between t
he gascolator and the fuel pump; the other is in a fuel line leading from t
he fuel splitter on one of the carburetors.
The Pipistrel support staff notes that if the sensor is placed between the
gascolator and the fuel pump, it will be inaccurate by the amount of fuel i
s being returned to the tank in the fuel return line leading out of the spl
itter. In that case, the fuel flow instrument will have to be "adjusted" b
y some undefined amount to account for the fuel return.
The alternative, however, will measure the fuel flow to only one of the car
buretors, so I assume the instrument will have to be adjusted to double the
reading in that case. This assumes that such an adjustment is possible, a
nd it also assumes that the fuel flow to the two carburetors is identical (
although if the carburetors are balanced, that is not an unreasonable assum
ption).
What are the rest of you doing?
Also, the fuel flow sensor that came with my kit is a Brauniger device. I
plan to use a Dynon FlightDek D180. Does anyone know the electrical output
characteristerics of the Brauniger flow sensor, and can you confirm (or de
ny) that it is compatible with the Dynon? Do you know whether the Dynon al
lows the sort of calibration adjustments necessary to address the installat
ion questions above?
Thanks a lot,
Paul Kuntz
http://www.pipistrelbuilders.com
ist" target=_blank>http://www.matronics.com/Navigator?RotaxEngines-List
p://forums.matronics.com
Make your little one a shining star! Shine on!
href="http://www.matronics.com/Navigator?RotaxEngines-List">http://www.ma
tronics.com/Navigator?RotaxEngines-List
href="http://forums.matronics.com">http://forums.matronics.com
_________________________________________________________________
Gear up for Halo=AE 3 with free downloads and an exclusive offer. It=92s ou
r way of saying thanks for using Windows Live=99.
http://gethalo3gear.com?ocid=SeptemberWLHalo3_WLHMTxt_2
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: | 582 plugs up or down perf.? |
Hi; I like to know if there's a difference in the performance of the 582 between
having the engine set plugs up vs down, both short and long term?.Is one better
than the other?. Thx.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=134356#134356
Message 6
| 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: | 912ULS and XCOM760 Problem |
You are picking up the RFI (Radio Frequency Interference) some where in your
mic line. The first thing to do is to verify that you have good grounds on
the shields that feed your mic and ptt input connections between your audio
panel and your radio. Also check the ground on the shields between your mic
jacks and your audio panel.
You can also Check that you have a good ground to your trays.
90%+ of all RFI problems can be traced to a bad ground somewhere.
Noel
> -----Original Message-----
> From: owner-rotaxengines-list-server@matronics.com
> [mailto:owner-rotaxengines-list-server@matronics.com] On
> Behalf Of Tommy Walker
> Sent: Thursday, September 13, 2007 6:45 PM
> To: rotaxengines-list@matronics.com
> Subject: RotaxEngines-List: 912ULS and XCOM760 Problem
>
>
> <twalker@cableone.net>
>
> Rotaxers,
>
> I have a problem some of you may have experienced and thought
> I might get some help. I've already talked with a couple of
> the people on this list.
>
> This will be a little long, but if you got the time to read
> it, you might be able to help me out.....
>
> Here goes:
>
> (copy of email sent to XCOM support)....
>
> I bought an XCOM760 from you a couple of years ago (Invoice
> # 807), and I am just now getting to the point of using it.
> I have a problem and hope that you can point me in the right
> direction.
>
> The Xcom is mounted in a Zenith 701 with Rotax 912ULS. I
> have the 22000 uF capacitor installed and it appears to be
> working correctly.
>
> At engine idle, there is a slight noise entering the system
> when I press the PTT. When I increase RPM, the noise level
> increases proportionately. At RPM levels over 4000, the
> output seems to be so overcome by a high pitch whine that the
> message is unreadable. There is no outside noise when the
> PTT is not depressed. The radio receiver function works
> properly on all channels, just problems when mike button is
> pressed at higher RPM.
>
> Heres what Ive done:
>
> Installed a line filter just ahead of the XCOM.
>
> Isolated the headphone jacks so that they do not contact ground.
>
> Moved the 22000 uF capacitor to just in front of the XCOM in
> the electrical circuit.
>
> Tested the radio after having removed the fuses of all
> components except the tach.
>
> Substituted an antenna from a handheld transceiver for the
> Commant antenna.
>
> Removed the Commant antenna from the airplane and laid it on
> a plastic cover to see if it was introducing a ground loop.
> The noise was still present.
>
> Made up new antenna cable with suggested length of 7.9 ft.
>
> Hooked the XCOM to another battery, cranked up the 912 and
> again tried to communicate.
>
> None of the above reduced the noise level when the radio is
> used to communicate.
>
> If you have any suggestions, please let me know.
>
>
> Tommy Walker
> (End of Email)
>
> Thanks for any suggestions from the list.
>
> --------
> Tommy Walker
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=134266#134266
>
>
>
>
>
>
>
>
>
>
>
Message 7
| 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: | Rotax 912UL fuel flow sensor installation |
Use your first location after the gascolator.
Noel
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Paul
Kuntz
Sent: Thursday, September 13, 2007 10:08 PM
Subject: RotaxEngines-List: Rotax 912UL fuel flow sensor installation
I'm looking for advice and technical information on installation of a
fuel
flow sensor on the 912UL engine in my Pipistril Sinus motorglider.
Pipistrel offers two potential locations -- one is in the main fuel feed
between the gascolator and the fuel pump; the other is in a fuel line
leading from the fuel splitter on one of the carburetors.
The Pipistrel support staff notes that if the sensor is placed between
the
gascolator and the fuel pump, it will be inaccurate by the amount of
fuel is
being returned to the tank in the fuel return line leading out of the
splitter. In that case, the fuel flow instrument will have to be
"adjusted"
by some undefined amount to account for the fuel return.
The alternative, however, will measure the fuel flow to only one of the
carburetors, so I assume the instrument will have to be adjusted to
double
the reading in that case. This assumes that such an adjustment is
possible,
and it also assumes that the fuel flow to the two carburetors is
identical
(although if the carburetors are balanced, that is not an unreasonable
assumption).
What are the rest of you doing?
Also, the fuel flow sensor that came with my kit is a Brauniger device.
I
plan to use a Dynon FlightDek D180. Does anyone know the electrical
output
characteristerics of the Brauniger flow sensor, and can you confirm (or
deny) that it is compatible with the Dynon? Do you know whether the
Dynon
allows the sort of calibration adjustments necessary to address the
installation questions above?
Thanks a lot,
Paul Kuntz
http://www.pipistrelbuilders.com
Message 8
| 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: RotaxEngines-List Digest: 912ULS @ XCOM760 Problem |
Tommy: I'm not familiar with the XCOM760. Can you operate it as a
handheld transceiver? You have used a separate battery. It does sound
like the rf noise generated by the engine is picked up by the radio
antenna, from the tests you have done. But, can you remove the XCOM
entirely from the aircraft, run it with a rubber ducky antenna and its own
battery and move it around various distances from the aircraft. This
would, of course, need someone else with a set of headphones plugged into
the XCOM to listen. At least it might tell you whether the noise is
getting in through the aircraft ground side, or strictly as radiation
through the air.
John Goodings, C-FGPJ, CH601HD with R912S and ICOM-A22, Toronto/Ottawa;
and yes, we've had troubles with noise pick-up by the ICOM radio from our
Becker transponder!
Message 9
| 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 |
|
Paul,
I have a Tecnam Sierra with a Dynon D10 engine monitor with the Flowscan
201 sensor which is mounted in the fuel line AFTER the "return to tank
bleed" and before the lines split to each carburettor so it only reads
fuel actually being used by both . Works fine and I believe very
accurate.The Dynon counts the pulses put out by the flowmeter.I do not
know if it compatible to other flow sensing devices. You will have to
ask Dynon
Paul Mitchell
Message 10
| 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: 582 plugs up or down perf.? |
This question is likely to be a hot potato.
Probably many different ideas.
Some of the items that may effect the out come would be types of oils, carb set
ups, temps, ect...
Your better off running your engine up right if I understand the question right.
Less chance to foul plugs over time, easier starting and better low end lubrication
over time. This was researched and had been proved even back in the mid
1980's. Some people probably still run their engines upside down and that's
what they like and will defend it, but I have worked on and seen the difference
over the long haul and over many different models. The upside down engines run,
but you ask which was better.
--------
Roger Lee
Tucson, Az.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=134399#134399
Message 11
| 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: 582 plugs up or down perf.? |
Roger; the aircraft is the Zenair ch 701.There are pans for the engine mount for
R582 upside down I agree with you but wanted to hear what's the general knowledge
in the difference between both set ups. In the 701 right side up will mean
not only scratch building the mount but also solving a possible problem with
trust line. It will require raising the engine to a point where the cowling
will have to be cut to provide for the engine head to clear.Then fiberglass work
to create a "bump" to cover the raised part of the engine. Having said all
that I guess the question is if the difference (in engine performance)is worth
the effort?.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=134421#134421
Message 12
| 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 |
|
Thanks, Paul. That particular option makes complete sense, but would
require altering the fuel plumbing on my aircraft, because the fuel flow
to the carburetors goes through a four-way splitter. The splitter gets
the fuel from the pump on one leg, routes fuel to the carburetors on two
legs and has a restrictor in the fourth leg for the fuel return. I'm
trying to stick with the as-delivered kit components for now.
Based on the earlier replies, I'm planning to put the flow sensor
between the gascolator and the fuel pump, then calibrate the Dynon to
account for the fuel return. The portion of the fuel going to the
return may not be a linear relationship, so the calibration remains
uncertain, but probably close enough for practical purposes. I'll see
how it goes.
I suspect the Brauniger flow sensor provides a pulsed output like the
Flowscan, but I don't know for sure. As you suggest, I'll try Dynon and
see if they have the answer.
Regards,
Paul Kuntz
http://www.pipistrelbuilders.com
----- Original Message -----
From: Paul Mitchell
To: rotaxengines-list@matronics.com
Sent: Friday, September 14, 2007 7:51 AM
Subject: RotaxEngines-List:
Paul,
I have a Tecnam Sierra with a Dynon D10 engine monitor with the
Flowscan 201 sensor which is mounted in the fuel line AFTER the "return
to tank bleed" and before the lines split to each carburettor so it only
reads fuel actually being used by both . Works fine and I believe very
accurate.The Dynon counts the pulses put out by the flowmeter.I do not
know if it compatible to other flow sensing devices. You will have to
ask Dynon
Paul Mitchell
Message 13
| 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: RotaxEngines-List Digest: 912ULS @ XCOM760 Problem |
Hi John,
The XCOM is like the MicroAir, but has VOX intercom. I am still working on this,
but I think I'm getting close to making the radio usable. I will post my results.
Thanks for writing.
Tommy Walker in Alabama
--------
Tommy Walker
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=134498#134498
Message 14
| 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: Xcom 760 radio interferenceTOMMY WALKER |
Vince,
Thanks for writing. I am operating with just one headset and no external handheld
mike. I am close to a solution and will post the results.
Thanks,
Tommy
Do Not Archive
vince(at)devonwindmills.c wrote:
> Hi,
> I dont know your Xcom 760,but I had a similar problem wth my Icom
> IC A5 [a small portable handpset txrx] I got a boffin to find me a plug
> in adaptor to fit my own headphones and mike. to avoid using a seperate
> cable and PTT he arranged I use the PTT on the handset . the first few trips
> I couldnt understand the terrible interference on my transmit and was
> unreadable Eventually realised the PTT was enabling both my head mike and
> my handset mike, which was picking up cockpit engine acoustic and
> transmitting it at full blast
> Vince Hallam
> please phone rather than email for best results!
> 07941 313141
> 01803 316191
> www.devonwindmills.co.uk
> ---
--------
Tommy Walker
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=134500#134500
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! --
|