Today's Message Index:
----------------------
1. 12:04 AM - Re: Rejetting a 914 during Winter? (K Dilks)
2. 12:37 AM - Re: Rejetting a 914 during Winter? (conrad)
3. 02:40 AM - Re: Rejetting a 914 during Winter? (K Dilks)
4. 05:47 AM - Re: RotaxEngines-List Digest: 3 Msgs - 01/13/09 (Tom463@aol.com)
5. 07:09 AM - Re: Re: RotaxEngines-List Digest: 3 Msgs - 01/13/09 (LarryMcFarland)
6. 09:19 AM - Re: Re: RotaxEngines-List Digest: 3 Msgs - 01/13/09 (carl)
7. 04:22 PM - Using a key Ignition switch with a Rotax 912 (Les Goldner)
8. 06:10 PM - Bing Carbs (Silvano Gai)
9. 06:49 PM - Re: Using a key Ignition switch with a Rotax 912 (Craig Payne)
10. 07:06 PM - Re: Using a key Ignition switch with a Rotax 912 (Hugh MCKAY III)
11. 07:10 PM - Re: Bing Carbs (Hugh MCKAY III)
12. 07:23 PM - Re: Bing Carbs (Dave Austin)
13. 08:21 PM - Re: Using a key Ignition switch with a Rotax 912 (Noel Loveys)
14. 10:24 PM - Re: Bing Carbs (Silvano Gai)
15. 10:25 PM - Re: Using a key Ignition switch with a Rotax 912 (Les Goldner)
16. 11:16 PM - Re: Using a key Ignition switch with a Rotax 912 (Craig Payne)
Message 1
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| Subject: | Re: Rejetting a 914 during Winter? |
Check the solonoid valve.
All Rotax engines are jetted quite lean. If the solonoid does not work then the
Co is about 2,5% which on the turbo is too low at full wack so the valve opens
up makes it around 5 to 7%.
In the cold weather you are getting a very dense air charge so they will run a
bit more lean so the situation gets worse.
If this only occurs at full throttle then forget electrical except this valve.
Also check that the little hoses that connect the valve to the carbs and the
air box are good and check the nipple on the air box that feeds the alternate
pressure to the carbs via the valve has not moved or is loose . The nipple must
be aligned to get the small increase in pressure .A picture of that is in
the installation manual.
And last but not least let me know if you want to change the engine as I am looking
for a 914 to stick on my 601 xl, I have an S at the moment.
Kev
--------
Austria .............
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=224678#224678
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| Subject: | Re: Rejetting a 914 during Winter? |
> Oh check the threeway solonoid valve which richens the mixture up at high power
settings. You should hear it click on the ground if somone opens the throttle
up , engine not running of course. This is situated on the airbox on all but
the early engines.
Kev
I understood the the solenoid valve changes over to the ram air pressure (ie. clicks)
when the airbox pressure gets to 1270mbar. It does not click with throttle
position. The way to check the solenoid valve it to remove the hose connecting
the airbox to the pressure sensor and applying a small pressure with something
like a small syringe.
Conrad
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=224680#224680
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| Subject: | Re: Rejetting a 914 during Winter? |
Woops that right not throttle position, airbox pressure changes the solonoid valve.
Thanks Conrad for pointing that out.
Kev
--------
Austria .............
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=224687#224687
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| Subject: | Re: RotaxEngines-List Digest: 3 Msgs - 01/13/09 |
I recently was told the Ethanol in auto gas can cause the paper fuel filters
commonly used on Rotax engines to become clogged. Has anyone had an issue
with this?
Tom
N569AT
**************A Good Credit Score is 700 or Above. See yours in just 2 easy
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| Subject: | Re: RotaxEngines-List Digest: 3 Msgs - 01/13/09 |
Tom,
For 2 years I've been flying with a paper fuel filter, NAPA 31003,
changed out every year, and have never had a clog or problem of any sort.
Perhaps you had water that froze in the filter. That might do it. I used
87 octane (with Ethanol 10%) for 2 years and this winter, after draining
tanks for the annual to check screens, I replaced the 87 octane with
100LL because of the length of time the plane sets in the winter. This
year it's been 3 months and looks like snow may hold it off longer.
Will resume 87 or 91 octane in warmer weather as available.
The last fuel drained from the lines had signs of phase-separation
cloudy and stratified layering at 3 months.
Larry McFarland 601HDS with Stratus Subaru at www.macsmachine.com
Tom463@aol.com wrote:
> I recently was told the Ethanol in auto gas can cause the paper fuel
> filters commonly used on Rotax engines to become clogged. Has anyone
> had an issue with this?
>
> Tom
> N569AT
>
>
> *
> *
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| Subject: | Re: RotaxEngines-List Digest: 3 Msgs - 01/13/09 |
Tom
A few years back when I was still flying in the winter I saw ice crystal
collect in the funnel filter. This was on very cold mornings -20C with
auto gas left outside in plastic containers. The crystals looked like
tiny needles 1/4" long.
These would clog any fine filter.
Carl
----- Original Message -----
From: Tom463@aol.com
To: rotaxengines-list@matronics.com
Sent: Wednesday, January 14, 2009 8:46 AM
Subject: RotaxEngines-List: Re: RotaxEngines-List Digest: 3 Msgs -
01/13/09
I recently was told the Ethanol in auto gas can cause the paper fuel
filters commonly used on Rotax engines to become clogged. Has anyone
had an issue with this?
Tom
N569AT
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| Subject: | Using a key Ignition switch with a Rotax 912 |
I know it is not the best idea to use an off the shelf inexpensive duel
ignition switch with a key because of the possibility of the switch failing.
However, given the ease of use and (limited) security feature, I chose to
use such a switch.
Now I am being told that it is a particularly bad idea to use this type of
ignition switch on a Rotax 912 engine because a lot more current passes
through the switch with a Rotax 912 than with a Continental or Lycoming. I
was also told that this current far exceeds the current that these switches
were designed for.
Does anyone know if this information is true? I don't want to have to lie
upside down under may panel for a few hours pulling out the darn switch if
this is just an old wife's tale.
Les
Message 8
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It is time to rebuild my Bing carbs for my 912 UL.
Should I just order the kit and do it myself,
or should I send it to some shops, in this case what do you recomend?
Thank You
-- Silvano
Message 9
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| Subject: | Using a key Ignition switch with a Rotax 912 |
The Rotax installation manual for the 912 series lists these voltage and
current ratings for the "mag" switches (Edition 1, rev 0, page 112, May
2007)
- switching voltage: min. 250 V
- switching current: min. 0.5 A
I don't know how it compares to the grounding of a conventional mag.
-- Craig
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Les
Goldner
Sent: Wednesday, January 14, 2009 5:22 PM
Subject: RotaxEngines-List: Using a key Ignition switch with a Rotax 912
<lgold@quantum-associates.com>
I know it is not the best idea to use an off the shelf inexpensive duel
ignition switch with a key because of the possibility of the switch failing.
However, given the ease of use and (limited) security feature, I chose to
use such a switch.
Now I am being told that it is a particularly bad idea to use this type of
ignition switch on a Rotax 912 engine because a lot more current passes
through the switch with a Rotax 912 than with a Continental or Lycoming. I
was also told that this current far exceeds the current that these switches
were designed for.
Does anyone know if this information is true? I don't want to have to lie
upside down under may panel for a few hours pulling out the darn switch if
this is just an old wife's tale.
Les
Message 10
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| Subject: | Re: Using a key Ignition switch with a Rotax 912 |
Les: I don't know how you have wired your 912, but I can tell you that I us
e a regular keyed ignition switch to start my 912. The switch has three pos
itions, On, Start, Off, and Acc. It is an ordinary ignition switch. The ful
l starting current does not go through the switch. The starting position on
the switch pulls in the starter relay coil which connects the + 12V side o
f the battery to the starter itself.
-
Hugh McKay
Allegro 2000
Rotax 912UL-
--- On Wed, 1/14/09, Les Goldner <lgold@quantum-associates.com> wrote:
From: Les Goldner <lgold@quantum-associates.com>
Subject: RotaxEngines-List: Using a key Ignition switch with a Rotax 912
<lgold@quantum-associates.com>
I know it is not the best idea to use an off the shelf inexpensive duel
ignition switch with a key because of the possibility of the switch failing
.
However, given the ease of use and (limited) security feature, I chose to
use such a switch.
Now I am being told that it is a particularly bad idea to use this type of
ignition switch on a Rotax 912 engine because a lot more current passes
through the switch with a Rotax 912 than with a Continental or Lycoming. I
was also told that this current far exceeds the current that these switches
were designed for.
Does anyone know if this information is true? I don't want to have to lie
upside down under may panel for a few hours pulling out the darn switch if
this is just an old wife's tale.
Les
Message 11
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Silvano:
-
If your plane is an E-LSA and you are trained by Rotax, you can do the insp
ection and re-build yourself. If your plane is a S-LSA you cannot do the wo
rk yourself.
-
Hugh McKay
Allegro 2000
Rotax 912UL
--- On Wed, 1/14/09, Silvano Gai <pilot@ip6.com> wrote:
From: Silvano Gai <pilot@ip6.com>
Subject: RotaxEngines-List: Bing Carbs
It is time to rebuild my Bing carbs for my 912 UL.
Should I just order the kit and do it myself,
or should I send it to some shops, in this case what do you recomend?
Thank You
-- Silvano
Message 12
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Silvano,
How many hours do you have on the bings?
Dave Austin 601HDS - 912
Message 13
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| Subject: | Using a key Ignition switch with a Rotax 912 |
The original DHC-2 only had two toggle switches for the mags... no keys
except maybe the doors and I never saw them being used. However there was
usually a switch right on the battery terminal that cut all power except to
the clock. BTW ever crank over one of those old radials?? You had to get
the flywheel running, with a crank, very fast then jump in and engage the
start clutch.... A good workout.
Noel
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Les
Goldner
Sent: Wednesday, January 14, 2009 8:52 PM
Subject: RotaxEngines-List: Using a key Ignition switch with a Rotax 912
<lgold@quantum-associates.com>
I know it is not the best idea to use an off the shelf inexpensive duel
ignition switch with a key because of the possibility of the switch failing.
However, given the ease of use and (limited) security feature, I chose to
use such a switch.
Now I am being told that it is a particularly bad idea to use this type of
ignition switch on a Rotax 912 engine because a lot more current passes
through the switch with a Rotax 912 than with a Continental or Lycoming. I
was also told that this current far exceeds the current that these switches
were designed for.
Does anyone know if this information is true? I don't want to have to lie
upside down under may panel for a few hours pulling out the darn switch if
this is just an old wife's tale.
Les
Message 14
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140 hours
-- Silvano
Dave Austin wrote:
> Silvano,
> How many hours do you have on the bings?
> Dave Austin 601HDS - 912
> *
>
>
> *
Message 15
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| Subject: | Using a key Ignition switch with a Rotax 912 |
Hugh,
I wired my aircraft according to Robert Nuckolls Aeroelectric company's
Rotax 912/914 wiring diagram Z16, except I used an ignition key. I know
that the staring current never goes through the keyed switch. My concern is
the current going through when the ignition is shorted out to turn the
engine off.
Craig Payne answered the question better by telling me how much current and
voltage goes through the mag shut off (250V & .5A "minimum"). But I think I
need to know the maximum rather than minimum amount. and then call the
keyed/switch manufacturer to see what he says.
Les
Les
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Hugh
MCKAY III
Sent: Wednesday, January 14, 2009 7:06 PM
Subject: Re: RotaxEngines-List: Using a key Ignition switch with a Rotax 912
Les: I don't know how you have wired your 912, but I can tell you that I use
a regular keyed ignition switch to start my 912. The switch has three
positions, On, Start, Off, and Acc. It is an ordinary ignition switch. The
full starting current does not go through the switch. The starting position
on the switch pulls in the starter relay coil which connects the + 12V side
of the battery to the starter itself.
Hugh McKay
Allegro 2000
Rotax 912UL
--- On Wed, 1/14/09, Les Goldner <lgold@quantum-associates.com> wrote:
From: Les Goldner <lgold@quantum-associates.com>
Subject: RotaxEngines-List: Using a key Ignition switch with a Rotax 912
<lgold@quantum-associates.com>
I know it is not the best idea to use an off the shelf inexpensive duel
ignition switch with a key because of the possibility of the switch failing.
However, given the ease of use and (limited) security feature, I chose to
use such a switch.
Now I am being told that it is a particularly bad idea to use this type of
ignition switch on a Rotax 912 engine because a lot more current passes
through the switch with a Rotax 912 than with a Continental or Lycoming. I
was also told that this current far exceeds the current that these switches
were designed for.
Does anyone know if this information is true? I don't want to have to lie
upside down under may panel for a few hours pulling out the darn switch if
this is just an old wife's tale.
Les
D========================
=========
D========================
=========
D========================
=========
D========================
=========
Message 16
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| Subject: | Using a key Ignition switch with a Rotax 912 |
Sorry, those are the minimum ratings for the *switches*. Section 17.3.4 is
titled "Ignition switches". So you can treat them as the *maximum* (at least
approximately) found in the circuit.
I have an uninstalled ACS A-510-2 OFF-LEFT-RIGHT-BOTH-START switch and its
datasheet. But the datasheet doesn't give any current ratings. On the other
hand looking at the construction of the switch the same style contacts are
used for the circuits for the master and starter contactors and the two mag
circuits. To my eye it does not seem likely that the Rotax pseudo-mag
circuit would "far exceed" the capacity of the ASC switch. If it were my
plane I wouldn't worry. I'm using separate toggle switches on my (unflown)
701/912 combo but only so I have the option of cranking with both mags off.
I would do two things: ask Spruce if they have any ratings and post your
question on the Matronics AeroElectric forum. Robert Nuckolls hangs out
there and may have more information. To my mind the final bit of missing
information is how much current flows and at what voltage when grounding the
P-lead of a conventional mag. Because that is what the ACS switch was
designed to do.
-- Craig
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Les
Goldner
Sent: Wednesday, January 14, 2009 11:25 PM
Subject: RE: RotaxEngines-List: Using a key Ignition switch with a Rotax 912
Hugh,
I wired my aircraft according to Robert Nuckolls Aeroelectric company's
Rotax 912/914 wiring diagram Z16, except I used an ignition key. I know
that the staring current never goes through the keyed switch. My concern is
the current going through when the ignition is shorted out to turn the
engine off.
Craig Payne answered the question better by telling me how much current and
voltage goes through the mag shut off (250V & .5A "minimum"). But I think I
need to know the maximum rather than minimum amount. and then call the
keyed/switch manufacturer to see what he says.
Les
Les
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Hugh
MCKAY III
Sent: Wednesday, January 14, 2009 7:06 PM
Subject: Re: RotaxEngines-List: Using a key Ignition switch with a Rotax 912
Les: I don't know how you have wired your 912, but I can tell you that I use
a regular keyed ignition switch to start my 912. The switch has three
positions, On, Start, Off, and Acc. It is an ordinary ignition switch. The
full starting current does not go through the switch. The starting position
on the switch pulls in the starter relay coil which connects the + 12V side
of the battery to the starter itself.
Hugh McKay
Allegro 2000
Rotax 912UL
--- On Wed, 1/14/09, Les Goldner <lgold@quantum-associates.com> wrote:
From: Les Goldner <lgold@quantum-associates.com>
Subject: RotaxEngines-List: Using a key Ignition switch with a Rotax 912
<lgold@quantum-associates.com>
I know it is not the best idea to use an off the shelf inexpensive duel
ignition switch with a key because of the possibility of the switch failing.
However, given the ease of use and (limited) security feature, I chose to
use such a switch.
Now I am being told that it is a particularly bad idea to use this type of
ignition switch on a Rotax 912 engine because a lot more current passes
through the switch with a Rotax 912 than with a Continental or Lycoming. I
was also told that this current far exceeds the current that these switches
were designed for.
Does anyone know if this information is true? I don't want to have to lie
upside down under may panel for a few hours pulling out the darn switch if
this is just an old wife's tale.
Les
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