Today's Message Index:
----------------------
1. 02:49 AM - Re: Oil pressure (Carlos Trigo)
2. 03:14 AM - Re: Oil pressure (Gilles Thesee)
3. 05:32 AM - Re: Oil pressure (Carlos Trigo)
4. 07:03 AM - Re: Oil pressure (Roger Lee)
5. 07:04 AM - Re: Etanol Mandate for aAll Fuel in State (John M. Goodings)
6. 08:02 AM - 912 EFI kit (paul wilson)
7. 09:01 AM - Re: 912 EFI kit (Gilles Thesee)
8. 10:03 AM - Re: 912 EFI kit (paul wilson)
9. 10:39 AM - Re: 912 EFI kit (Gilles Thesee)
10. 08:11 PM - Re: 912ULS and XCOM760 Problem (rampil)
11. 08:14 PM - Re: Oil pressure (rampil)
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 |
|
Merci Gilles
Thanks Roger
I read those numbers in the Manual, but they also state 4 bar as "nominal
pressure", which I'm not sure what exactly means.
So, anything above 1.5 bar and below 5 bar would be safe.
Why this can be so variable?
What exactly causes the differences in oil pressure between engines?
Carlos
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: Oil pressure |
Carlos Trigo a crit :
> So, anything above 1.5 bar and below 5 bar would be safe.
> Why this can be so variable?
> What exactly causes the differences in oil pressure between engines?
>
Carlos,
Oil pressure is dependent on
- engine : RPM, relief valve setting, clearances in the engine, etc.
- oil viscosity : oil grade, temperature, pollution.
Some engine measure pressure upstream at the pump outlet, others
downstream of the the oil galleries.
Best regards,
--
Gilles
http://contrails.free.fr
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 |
|
>
> Oil pressure is dependent on
> - engine : RPM, relief valve setting, clearances in the engine, etc.
> - oil viscosity : oil grade, temperature, pollution.
>
>
> Some engine measure pressure upstream at the pump outlet, others
> downstream of the the oil galleries.
>
OK, now I got it!
How good is the feeling of learning ...
Merci de nouveau, Gilles
Carlos
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: Oil pressure |
Hi Carlos,
Gilles is exactly right.
Most 912's I have seen run between 40-55 psi normally.
On another note I was running an oil pressure when new at around 55 psi and after
a while (6-7 months) I was running 41 psi. I prefer my oil pressure higher
just to help make sure it does a good lubrication job in the tight tolerance areas
and in case things within the engine got too close to operational maximums.
I put a Rotax shim under the oil pressure control spring. This didn't help
at all. I checked the pressure in the system with a gauge and found with the shim
my oil pressure sender was reading 20 psi low. I replaced the oil pressure
sender with a new one and now I am at 58-60 psi under normal running rpm.
Moral to the story is if you oil pressure seems too low then you might want to
check it with a manual pressure gauge or at least against another known good oil
pressure sender.
Oil pressure senders on the 912's do occasionally go bad due to vibration. If you
are in the experimental class then a remote mount of the sender is not a bad
idea and very easy. I am in the SLSA class in the USA and can not legally do
that without permission from the manufacturer.
--------
Roger Lee
Tucson, Az.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=151293#151293
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: Etanol Mandate for aAll Fuel in State |
My apologies! Thom Riddle quite rightly pointed out to me that I meant
ETHANOL, not METHANOL, in my post about alcohol additives to autogas in
Canada. Sorry.
John Goodings, C-FGPJ, CH601HD with R912S, Carp/Ottawa, Toronto/Waterloo.
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 |
|
Interesting
From another list
Looking forward to hearing about the success of the kit and all the
changes required.
http://www.sdsefi.com/aircraft.html
You need to scroll down the page for the announcement.
I have no affiliation with these people
Regards, Paul
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 |
|
paul wilson a crit :
> http://www.sdsefi.com/aircraft.html
> You need to scroll down the page for the announcement.
Paul,
Please note that adding electronic fuel injection to an engine means
adding dependence on electricity.
> The extra current draw of the electric fuel pump, ECU and injectors
> comes to around 7-9 amps. Operation with the existing internal 20 amp
> alternator will demand that other normal electrical loads don't exceed
> 8-10 amps
And considering the standard Rotax regulator cannot supply more than
12-14 amps continuous without tending to self destruct, there is not
much left for the ordinary appliances and battery on board.
The maximum regulator momentary output is in the vicinity of 18 amps.
Regards,
--
Gilles Thesee
Grenoble, France
http://contrails.free.fr
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 |
|
True Rotax has minimal electrical power. To bad.
The fix would be a proper alternator, then use
the Rotax one for backup with just essential
items on line. There are more than one add-on
alternator kits available for the 912. I probably will need one anyway.
The EFI does add more complexity with a required
high pressure pump or two and return line and who knows what else.
It would be nice to modernize the engine.
BTW, I read about a lot of regulator failures,
but have not read about the stator generator failures.
Paul
===========
At 08:59 AM 12/9/2007, you wrote:
>Thesee <Gilles.Thesee@ac-grenoble.fr>
>
>paul wilson a crit :
>>http://www.sdsefi.com/aircraft.html
>>You need to scroll down the page for the announcement.
>
>Paul,
>Please note that adding electronic fuel
>injection to an engine means adding dependence on electricity.
>>The extra current draw of the electric fuel
>>pump, ECU and injectors comes to around 7-9
>>amps. Operation with the existing internal 20
>>amp alternator will demand that other normal
>>electrical loads don't exceed 8-10 amps
>And considering the standard Rotax regulator
>cannot supply more than 12-14 amps continuous
>without tending to self destruct, there is not
>much left for the ordinary appliances and battery on board.
>The maximum regulator momentary output is in the vicinity of 18 amps.
>
>
>Regards,
>--
>Gilles Thesee
>Grenoble, France
>http://contrails.free.fr
>
>
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 wilson a crit :
>
> It would be nice to modernize the engine.
Adding complexity is justified only for correcting some defect.
Not sure whether the 912 really is in need of fuel injection.
>
> BTW, I read about a lot of regulator failures, but have not read
> about the stator generator failures.
The stator itself is very robust.
It took a lot of abuse when we bench tested it :
http://contrails.free.fr/elec_ducati.php
Best regards,
--
Gilles
http://contrails.free.fr
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: 912ULS and XCOM760 Problem |
Gee Tom,
I don't know what other vendors you use with your aircraft,
but a month for radio repair all the way to Oz seems pretty
short to me. I just waited three months for delivery of equipment
that was "in stock" when I purchased it! Yes, I was grounded
the whole time.
I suggest relaxing a bit, after all, this is a hobby we choose to
reduce stress on the ground ;-)
Ira
FAA AME
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=151400#151400
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: Oil pressure |
Carlos,
Nominal means perfect. More or less!
Ira
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=151401#151401
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! --
|