Today's Message Index:
----------------------
1. 05:54 AM - Fine Fuel Filter (Hugh)
2. 11:03 AM - Re: Re: 912 EFI kit (jason Parker)
3. 02:07 PM - Re: Re: 912 EFI kit (Joe Ronco)
4. 02:13 PM - Re: Re: Engine Vibration (Hugh)
5. 02:27 PM - Re: Engine Vibration (Thom Riddle)
6. 02:35 PM - Re: Engine Vibration (Roger Lee)
7. 02:46 PM - Re: Fine Fuel Filter (Roger Lee)
8. 03:22 PM - Re: Re: Engine Vibration (Guy Buchanan)
9. 04:47 PM - Re: Re: 912 EFI kit (jason Parker)
10. 05:32 PM - Re: Fine Fuel Filter (Noel Loveys)
11. 06:41 PM - Re: Re: Engine Vibration (Hugh)
Message 1
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| Subject: | Fine Fuel Filter |
Gentlemen:
On page 38 of the Rotax 912UL engine installation manual, figure 22 shows
that a fine fuel filter (mesh size 0.1 mm) must be installed upstream of the
mechanical fuel pump. I assume this is the bowl/filter unit that protrudes
out of the belly of the plane that is installed between the fuel tank and
electric fuel pump. My question is how often does this "filter" have to be
checked, and since I have never opened the filter unit what type filter is
it, and can it be easily replaced if contaminated?
Hugh McKay
Allegro 2000
912UL
N661WW
Message 2
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I have seen may people attempt to do fuel injection, but at www.experimentalfuelinjection.com , we do it right. First off, fuel injection requires 8-9amps no matter who is making the set up. With this in mind, the only way to properly run fuel injection is with a 55 amp external alt. Our set ups are simply the best. We offer 4 different configurations of 912's and 5 different configurations of 914's. From Intercooled direct port fuel injection, to truly redundant set ups on fuel and ignition, we have it all.
Regards
Jason
www.experimentalfuelinjection.com
661 428-1850
it is about a ready to go EFI system utilize the original manifold
you can choice with either one or two (as a back up) ecu boxes
what is important the system can run without battery it is self redundant.
better fuel economy in middle range, better egt with only approx 20C differ between
cylinders.
nice system but to expensive for the 100 to 200 hrs flyer per year i think
but nice and technical
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=156564#156564
Message 3
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JASON: I am curious as to why you need a 55 Amp alternator for the EFI for
the 912 ULS? Another engine manufacturer only uses a 30 Amp.
Joe Ronco
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of jason
Parker
Sent: Monday, January 14, 2008 12:00 PM
Subject: Re: RotaxEngines-List: Re: 912 EFI kit
I have seen may people attempt to do fuel injection, but at
www.experimentalfuelinjection.com , we do it right. First off, fuel
injection requires 8-9amps no matter who is making the set up. With this in
mind, the only way to properly run fuel injection is with a 55 amp external
alt. Our set ups are simply the best. We offer 4 different configurations of
912's and 5 different configurations of 914's. From Intercooled direct port
fuel injection, to truly redundant set ups on fuel and ignition, we have it
all.
Regards
Jason
www.experimentalfuelinjection.com
661 428-1850
alex_01 <zoechling@gmx.de> wrote:
it is about a ready to go EFI system utilize the original manifold
you can choice with either one or two (as a back up) ecu
Message 4
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| Subject: | Re: Engine Vibration |
Roger:
I have tried to find some one near here (Charlotte and or Hickory, NC) that
can dynamically balance my Allegro 2000 that has a 3 blade WoodComp prop. I
have found that no one will do it for a number of reasons two of which
follows:
1. They do not balance props that have a gearbox between the engine
propeller drive.
2. There is no place on the WoodComp aluminum hub to attach balance weight.
At least one shop said they would look at my plane if I would fly it down to
their shop. I don't fully understand why the gearbox and the gears would be
a problem. Anyway, right now I have run into a dead end on this matter, and
don't fully know why.
Hugh
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee
Sent: Tuesday, January 01, 2008 11:28 AM
Subject: RotaxEngines-List: Re: Engine Vibration
Hi Hugh,
Your Woodcomp was statically balanced at the factory. Aircraft Spruce and a
few other people sell a very simple static balance device that utilizes a
bubble balancer on a string. This set up works well enough for those who's
props weren't done or wants to check theirs once a year.
Even though your prop is statically balanced, everything forward of the
mounting plate on the gearbox i.e. nuts, bolts, washers, spinners and the
such are not and none of these are in balance when turning 5000 rpm. All
props should be balanced on the plane spinning at cruise rpm. You go out to
the pad and chalk the wheels and tie it down. The balancer then can measure
vibration that you can not feel. There has to be someone in your area that
does this for other aircraft. Just start asking around with the service
shops and I'm sure someone knows of a person who can do a dynamic balance.
Get on the web and type in prop balancing + your town.
The instrument that does this does cost $2K and up, but people who service
aircraft should know of someone who has this instrument. Dynamic prop
balancing is a regular aircraft maint. function. When I started to look I
didn't know of anyone in my area. After a little search I found 4 people who
did this. Prices were from $175-$250. Takes about an hour.
Think of a dynamic prop balance that is not done like this.
If someone smokes cigarettes or is a diabetic it does not take their life
right now, but over a long time period it causes many other problems and an
early death. A static balance only for your engine and gearbox is not
enough. My Warp Drive was static balanced at the factory, but way off when
mounted on the plane with hardware and running.
--------
Roger Lee
Tucson, Az.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=155353#155353
Message 5
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| Subject: | Re: Engine Vibration |
Hugh,
I think you are getting a run-around. Its not like Type Certificated aircraft have
never had gearbox PSRUs. The Cessna 175 comes to mind. The center of rotating
mass asymmetry with respect to the rotational center of the prop shaft, which
what dynamic balancing is supposed to correct, has nothing to do with the
fact that there is a gearbox between the prop shaft and the crankshaft, at least
to my way of thinking, but I could be wrong.
do not archive
--------
Thom Riddle
N221FA Allegro 2000 912UL
N197BG FS1/447
--------------------
Believe nothing, no matter where you read it or who has said it, not even if I
have said it, unless it agrees with your own reason and your own common sense.
- Buddha
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=158118#158118
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| Subject: | Re: Engine Vibration |
Hi Hugh,
I don't know why a Rotax gearbox would scare anyone away. You balance it just like
any other prop. They are just uneducated. The gearbox wouldn't make any difference.
The prop will balance or it won't.
You attach balance weights (washers) to the hub bolts.
--------
Roger Lee
Tucson, Az.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=158119#158119
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| Subject: | Re: Fine Fuel Filter |
Hi Hugh,
Your operators manual or inspection manual may also have a time line for replacing
your filter. I'm sure Allegro has something in one of their manuals. Depending
on how often you fly I would change it every 100 hrs. or once a year at its
annual. Some people only fly 30 hrs a year and some 250 hrs a year. Many fuel
filters have a throw away element inside and some are toss the whole filter.
Seems like lots of the filter elements can be had at an auto parts store.
--------
Roger Lee
Tucson, Az.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=158123#158123
Message 8
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| Subject: | Re: Engine Vibration |
At 02:14 PM 1/14/2008, you wrote:
>1. They do not balance props that have a gearbox between the engine
>propeller drive.
>2. There is no place on the WoodComp aluminum hub to attach balance weight.
Polite BS. I've had my Rotax 582 / Warp 3-blade dynamically balanced.
They attached weight to the spinner backing plate. You could do the
prop bolts as well.
Guy Buchanan
San Diego, CA
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
Message 9
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Joe,
I use the same alternator used on the rotax alt kit. It is a 6 pound denso alternator
one wire set up. You need 9-10 amps for fuel injection. If you rely on
the stock stater /gen assembly, it is only good for 14 continuous. With fuel injection
pulling 10 amps, that leaves you 4 for gages, strobes, radio, ect. To
answer your question, a 30 amp alt will do just fine.
Jason
Joe Ronco <joe@halzel.com> wrote: JASON: I am curious as
to why you need a 55 Amp alternator for the EFI for the 912 ULS? Another engine
manufacturer only uses a 30 Amp.
Joe Ronco
From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of jason Parker
Sent: Monday, January 14, 2008 12:00 PM
To: rotaxengines-list@matronics.com
Subject: Re: RotaxEngines-List: Re: 912 EFI kit
I have seen may people attempt to do fuel injection, but at www.experimentalfuelinjection.com , we do it right. First off, fuel injection requires 8-9amps no matter who is making the set up. With this in mind, the only way to properly run fuel injection is with a 55 amp external alt. Our set ups are simply the best. We offer 4 different configurations of 912's and 5 different configurations of 914's. From Intercooled direct port fuel injection, to truly redundant set ups on fuel and ignition, we have it all.
Regards
Jason
www.experimentalfuelinjection.com
661 428-1850
alex_01 <zoechling@gmx.de> wrote:
it is about a ready to go EFI system utilize the original manifold
you can choice with either one or two (as a back up) ecu
http://www.matronics.com/Navigator?RotaxEngines-List
http://forums.matronics.com
http://www.matronics.com/contribution
Message 10
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| Subject: | Fine Fuel Filter |
Hugh:
I just had a peek down through all my unread posts and noticed no one
answered your question. I hope you will get many answers written in
different ways.
The doo dad with the glass bowl you see on the bottom of your plane is
called a gascolator. It is a device designed to help separate water if
there is any form your fuel before it gets to the engine. Most gascolators
have a very fine copper or brass screen in them that filter out any lumps
that may be in the gas. I think the screen is generally .05 mm which means
it is all the pre screening your pump will need.
To clean the gascolator, I suggest annually or every 50 hr whichever comes
first, cut the lockwire and unscrew the little wheel slide the retainer
forward away from the bowl and the bowl will drop down by itself. Be
careful some of the screens are held in place by tiny O rings and you don't
want to lose one or drop and break the bowl. You can clean the screen with
a little compressed air ( not too much ) it is not as strong as chain link
fence so handle it gently.
When you re assemble the bowl and the retainer and tighten up the little
wheel don't forget to lockwire the wheel back in place. If the bowl falls
out no gas can get to the engine and it's real messy.
Btw I'm of the mind that only screens should be used before the fuel
pump..... true filters should always be used on the pressure side of a
system. I'll bet I'll get reaction to that one! J
Noel
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Hugh
Sent: Monday, January 14, 2008 10:25 AM
Subject: RotaxEngines-List: Fine Fuel Filter
Gentlemen:
On page 38 of the Rotax 912UL engine installation manual, figure 22 shows
that a fine fuel filter (mesh size 0.1 mm) must be installed upstream of the
mechanical fuel pump. I assume this is the bowl/filter unit that protrudes
out of the belly of the plane that is installed between the fuel tank and
electric fuel pump. My question is how often does this "filter" have to be
checked, and since I have never opened the filter unit what type filter is
it, and can it be easily replaced if contaminated?
Hugh McKay
Allegro 2000
912UL
N661WW
Message 11
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| Subject: | Re: Engine Vibration |
Tom, Roger, Guy:
Thanks for your feedback! I suspected the very same thing. I am going to
continue to seek out some one to do the Dyn. Balancing. At least I'm going
to follow up with the firm that was willing to look at my plane. Thanks
again to all of you.
Hugh
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Guy
Buchanan
Sent: Monday, January 14, 2008 6:21 PM
Subject: RE: RotaxEngines-List: Re: Engine Vibration
At 02:14 PM 1/14/2008, you wrote:
>1. They do not balance props that have a gearbox between the engine
>propeller drive.
>2. There is no place on the WoodComp aluminum hub to attach balance weight.
Polite BS. I've had my Rotax 582 / Warp 3-blade dynamically balanced.
They attached weight to the spinner backing plate. You could do the
prop bolts as well.
Guy Buchanan
San Diego, CA
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
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