Today's Message Index:
----------------------
1. 06:19 PM - Carb vents leaking on 912 ULS (Jack Seaford)
2. 07:09 PM - Re: 912S - Powerfin Prop Now what? (Randy Daughenbaugh)
3. 07:22 PM - Tires and tubes 7.00-6 (Rick)
4. 07:36 PM - Re: Air filters - Carb Ice - 912 (Randy Daughenbaugh)
5. 07:56 PM - Re: 912S - Powerfin Prop Now what? (Bob Robertson)
6. 08:07 PM - Re: Air filters - Carb Ice - 912 (John Anderson)
7. 10:26 PM - Re: Carb vents leaking on 912 ULS (jimshumaker)
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: | Carb vents leaking on 912 ULS |
--> Kitfox-List message posted by: "Jack Seaford" <jseaford@bellsouth.net>
Any help on carb vent lines leaking or weeping at idle on a 912?
Thanks
Jack Seaford
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: | 912S - Powerfin Prop Now what? |
--> Kitfox-List message posted by: "Randy Daughenbaugh" <rjdaugh@rapidnet.com>
Bob,
This really helps! And the education on the strength/brittleness is
appreciated as well.
As an additional issue, I think I also need bushings/dowels/lugs that
serve the same function between the prop extention and the prop hub.
These need to be between 25 and 30 mm long. Are these available some
place?
Thanks again,
Randy
.
-----Original Message-----
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Bob
Robertson
Subject: Re: Kitfox-List: 912S - Powerfin Prop Now what?
--> Kitfox-List message posted by: "Bob Robertson"
<aerocon1@telusplanet.net>
Randy...
Wadda you mean "not smart enough"!!!! You already figured out that the
8mm
bolts won't work in a 13mm hole. ;
)
Actually, there are some "spigot" nuts (shouldered nuts) that press into
the
13mm holes and have an 8mm thread.
These nuts will protrude through the front of the prop flange and also
act
as dowels. Your prop should have come with a hub that is drilled to
accept
these dowels. If you are using a 2" prop extension you will need to
have
the extension drilled to accept the dowels.
Any of the Rotax Service Centers can supply you with the nuts. You will
have to replace the bolts you recieved with the Powerfin. Make sure
the new bolts are also 8mm 8.8... (Don't get any of the high strength
metric
bolts as they are too brittle and can (will) fracture.
Hope this helps
Bob Robertson
Light Engine Services Ltd.
Rotax Service Center
St. Albert, Ab. Can
----- Original Message -----
From: "Randy Daughenbaugh" <rjdaugh@rapidnet.com>
Subject: Kitfox-List: 912S - Powerfin Prop Now what?
> --> Kitfox-List message posted by: "Randy Daughenbaugh"
<rjdaugh@rapidnet.com>
>
> I have a 912S and a nice Powerfin prop that I am not smart enough to
> hook together.
>
> The mounting bolts that come with the prop have Allen heads that fit
> through the mounting holes on the engine. 13 mm holes and heads same
> with a little clearance??
>
> I suspect that I need something like bushings to take the slack out
> between the 8 mm bolt and the 13 mm holes and then a larger washer
that
> captures the bushing and won't go through the hole. Again ???? It
> seems like they should have come with the prop or engine or the
> extension. ???
>
> I also have a 2" prop extension with the same issues, but once I solve
> one the other should be identical with 2" longer bolts.
>
> Am I on the right track? Who has these parts? Skystar? Powerfin?
> Rotax?
>
> Thanks for eliminating my ignorance in this area.
>
> Randy - Series 5/7 - It's the little things.......
>
>
==
==
==
==
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: | Tires and tubes 7.00-6 |
--> Kitfox-List message posted by: "Rick" <turboflyer@comcast.net>
I put a set on e-bay should anyone care to look.
Rick
do not archive
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: | Air filters - Carb Ice - 912 |
--> Kitfox-List message posted by: "Randy Daughenbaugh" <rjdaugh@rapidnet.com>
Lowell,
Your comment is right on for something that I am wrestling with. I have
been considering not using the air induction system and going with two
air filters with warm cowl air rather than the single air filter with
fresh cold air that the series 7 firewall forward calls for. I felt the
trade off was better breathing (less air friction) versus lower density
warm air. But I don't know where the balance is between the two
effects.
If I read you right, you feel that carb ice is more likely with the carb
heat system in place than if it is not used.... AND you feel that
performance is better with two air filters. Is that right? And what do
your base this on?
My guess from comments on the list here is that most people do not use
the carb heat system that Rotax supplies for the 912, but does pulling
cool fresh air like the series 7 firewall forward allows give better
performance? Is carb ice more likely in the 912S than the 912?
Randy - Mounting 912S on fuselage and anxious to get in the air!!!!
.
-----Original Message-----
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Lowell Fitt
Subject: Re: Kitfox-List: Air filters
--> Kitfox-List message posted by: "Lowell Fitt" <lcfitt@inreach.com>
John, Do you have the carb heat system on your airplane? If not you
are
the first person I have heard of that had a real carb ice problem. You
said
you forgotten the knob. Actually, I have heard of carb icing in the
Rotax
912, but only in aircraft with the carb heat system in place. The
induction
air is ducted from the front of the cowl - cold, whereas the air in non
carb heat installation the air is obtained from the back of the engine
compartment - warm. The absence of the friction in the system more than
compensates for the warmer air.
Lowell
----- Original Message -----
From: "John Oakley" <joakley@ida.net>
Subject: RE: Kitfox-List: Air filters
> --> Kitfox-List message posted by: "John Oakley" <joakley@ida.net>
>
> Paul,
> are you sure you want to remove the heat system. I had carb ice this
year
> for the first time in 1000 kitfox time. scared the hell out of me. I
had
> forgoten the knob (carb heat) and bairly limped into a field. it was a
big
> loss in hp and we were headed downhill.
>
> JOhn Oakley
>
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: 912S - Powerfin Prop Now what? |
--> Kitfox-List message posted by: "Bob Robertson" <aerocon1@telusplanet.net>
Hi Randy,
If the prop extension is commercially made, you might check with the
manufacturer. If it is "home brewed", you might require the services of a
machinist to make up the drive lugs. There are no "off the shelf" lugs that
i am aware of.
regards
Bob Robertson
----- Original Message -----
From: "Randy Daughenbaugh" <rjdaugh@rapidnet.com>
Subject: RE: Kitfox-List: 912S - Powerfin Prop Now what?
> --> Kitfox-List message posted by: "Randy Daughenbaugh"
<rjdaugh@rapidnet.com>
>
> Bob,
> This really helps! And the education on the strength/brittleness is
> appreciated as well.
>
> As an additional issue, I think I also need bushings/dowels/lugs that
> serve the same function between the prop extention and the prop hub.
> These need to be between 25 and 30 mm long. Are these available some
> place?
>
> Thanks again,
> Randy
>
> .
>
>
> -----Original Message-----
> From: owner-kitfox-list-server@matronics.com
> [mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Bob
> Robertson
> To: kitfox-list@matronics.com
> Subject: Re: Kitfox-List: 912S - Powerfin Prop Now what?
>
> --> Kitfox-List message posted by: "Bob Robertson"
> <aerocon1@telusplanet.net>
>
> Randy...
>
> Wadda you mean "not smart enough"!!!! You already figured out that the
> 8mm
> bolts won't work in a 13mm hole. ;
> )
> Actually, there are some "spigot" nuts (shouldered nuts) that press into
> the
> 13mm holes and have an 8mm thread.
> These nuts will protrude through the front of the prop flange and also
> act
> as dowels. Your prop should have come with a hub that is drilled to
> accept
> these dowels. If you are using a 2" prop extension you will need to
> have
> the extension drilled to accept the dowels.
> Any of the Rotax Service Centers can supply you with the nuts. You will
> have to replace the bolts you recieved with the Powerfin. Make sure
> the new bolts are also 8mm 8.8... (Don't get any of the high strength
> metric
> bolts as they are too brittle and can (will) fracture.
>
> Hope this helps
>
> Bob Robertson
> Light Engine Services Ltd.
> Rotax Service Center
> St. Albert, Ab. Can
>
>
> ----- Original Message -----
> From: "Randy Daughenbaugh" <rjdaugh@rapidnet.com>
> To: <kitfox-list@matronics.com>
> Subject: Kitfox-List: 912S - Powerfin Prop Now what?
>
>
> > --> Kitfox-List message posted by: "Randy Daughenbaugh"
> <rjdaugh@rapidnet.com>
> >
> > I have a 912S and a nice Powerfin prop that I am not smart enough to
> > hook together.
> >
> > The mounting bolts that come with the prop have Allen heads that fit
> > through the mounting holes on the engine. 13 mm holes and heads same
> > with a little clearance??
> >
> > I suspect that I need something like bushings to take the slack out
> > between the 8 mm bolt and the 13 mm holes and then a larger washer
> that
> > captures the bushing and won't go through the hole. Again ???? It
> > seems like they should have come with the prop or engine or the
> > extension. ???
> >
> > I also have a 2" prop extension with the same issues, but once I solve
> > one the other should be identical with 2" longer bolts.
> >
> > Am I on the right track? Who has these parts? Skystar? Powerfin?
> > Rotax?
> >
> > Thanks for eliminating my ignorance in this area.
> >
> > Randy - Series 5/7 - It's the little things.......
> >
> >
>
>
> ==
> ==
> ==
> ==
>
>
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: | Air filters - Carb Ice - 912 |
--> Kitfox-List message posted by: "John Anderson" <janderson412@hotmail.com>
Randy, with regard to the fresh cold air you mentionthe 7 calls for, how is this
different to a 5 or 6??
From: "RandyDaughenbaugh" <RJDAUGH@RAPIDNET.COM>
Subject: RE: Kitfox-List: Air filters - Carb Ice - 912
-- Kitfox-List message posted by: "RandyDaughenbaugh" <RJDAUGH@RAPIDNET.COM>
Lowell,
Your comment is right on for something that I am wrestling with.I have
been considering not using the air induction system and going with two
air filters with warm cowl air rather than the single air filter with
fresh cold air that the series 7 firewall forward calls for.I felt the
trade off was better breathing (less air friction) versus lower density
warm air. But I don't know where the balance is between the two
effects.
If I read you right, you feel that carb ice is more likely with the carb
heat system in place than if it is not used.... AND you feel that
performance is better with two air filters.Is that right?And what do
your base this on?
My guess from comments on the list here is that most people do not use
the carb heat system that Rotax supplies for the 912, but does pulling
cool fresh air like the series 7 firewall forward allows give better
performance?Is carb ice more likely in the 912S than the 912?
Randy -Mounting 912S on fuselage and anxious to get in the air!!!!
.
-----Original Message-----
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Lowell Fitt
Subject: Re: Kitfox-List: Air filters
-- Kitfox-List message posted by: "Lowell Fitt" <LCFITT@INREACH.COM>
John,Do you have the carb heat system on your airplane?If not you
are
the first person I have heard of that had a real carb ice problem.You
said
you forgotten the knob.Actually, I have heard of carb icing in the
Rotax
912, but only in aircraft with the carb heat system in place.The
induction
air is ducted from the front of the cowl - cold,whereas the air in non
carb heat installation the air is obtained from the back of the engine
compartment - warm.The absence of the friction in the system more than
compensates for the warmer air.
Lowell
----- Original Message -----
From: "John Oakley" <JOAKLEY@IDA.NET>
Subject: RE: Kitfox-List: Air filters
-- Kitfox-List message posted by: "John Oakley" <JOAKLEY@IDA.NET>
Paul,
are you sure you want to remove the heat system. I had carb ice this
year
for the first time in 1000 kitfox time. scared the hell out of me. I
had
forgoten the knob (carb heat) and bairly limped into a field. it was a
big
loss in hp and we were headed downhill.
JOhn Oakley
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: | Re: Carb vents leaking on 912 ULS |
--> Kitfox-List message posted by: "jimshumaker" <jimshumaker@sbcglobal.net>
Something interfering with the closure of the fuel shutoff valves in the
float bowel. Or an incorrect float setting. Or a stuck float. For a stuck
float tap the float bowl with the back of a screwdriver. For something
interfering, remove and clean checking for fiberglass strands that may be
invisible in fuel.
Jim Shumaker
----- Original Message -----
From: "Jack Seaford" <jseaford@bellsouth.net>
Subject: Kitfox-List: Carb vents leaking on 912 ULS
> --> Kitfox-List message posted by: "Jack Seaford" <jseaford@bellsouth.net>
>
> Any help on carb vent lines leaking or weeping at idle on a 912?
>
> Thanks
> Jack Seaford
>
>
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! --
|