Today's Message Index:
----------------------
1. 05:01 AM - Re: engine selection (Tom Beirne)
2. 05:26 AM - Re: Jabiru (Catz631@aol.com)
3. 06:48 AM - Re: Jabiru (Dave)
4. 08:59 AM - Re: Jabiru (Lynn Matteson)
5. 10:47 AM - Re: Jabiru (n85ae)
6. 11:47 AM - Re: 100 LL in Briggs and Stratton (way off topic) (Paul A. Franz, P.E.)
7. 02:00 PM - gsc props changing pitch in flight (jerry evans)
8. 02:38 PM - Re: gsc props changing pitch in flight (Pete Christensen)
9. 04:39 PM - Re: Jabiru (engine choices) (JetPilot)
10. 05:58 PM - Re: Re: Lights (Noel Loveys)
11. 08:05 PM - Re: gsc props changing pitch in flight (Daniel Wild)
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: | Re: engine selection |
Design gross weight can be limited by a number of factors;
Aerodynamic- stall speed, takeoff distance required, climb-rate etc. all increase
with higher wing loading. Depending on the CG the stick load forces may be
critical on larger designs (ie. when loaded to gross the distribution of the loads
may such that they put the CG at either limit)
Legal - LSA limitations for example, minimum 1 engine-out climb performance on
a multi-engine design etc.
Structural - aero structures are designed with at least a safety factor of 1.5
so the design loading increases very rapidly with airspeed. Turbulence is the
designers enemy here and the structure has to be able to withstand a specified
minimum up-gust loading at Vmo (design maneuvering speed-top of the green arc).
Again at Vne (top of the Yellow arc - beyond here be dragons) there is another
minimum up-gust to design for. That's why the yellow arc exists, only to be
entered on smooth air conditions. On most aircraft the highest bending moments
and shear loading will occur at the spar attachment points. On the Kitfox the
spar attach and carry-through structure are light by necessity but very strong
considering. We know that the aircraft will perform overgross - it will climb
from sea level and happily exceed Vne with a 582 in straight and level flight
if you firewall the throttle. The problem is that one bump could be your undoing,
it may not break the aircraft but may well bend bits that are important
and once plastically deformed they are much weaker.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 4067#204067
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 |
|
Jeff,
I agree whole heartily with you. I used to fly P-3's with the T56. I also
had a few engine failures.
My lawnmower with the Briggs, won't die. In fact it is rusted almost all the
way around the mower deck so that soon it will fall on the ground and I bet
it still runs. Very good analogy!
Dick Maddux
Fox 4-1200
Pensacola,Fl
**************Psssst...Have you heard the news? There's a new fashion blog,
plus the latest fall trends and hair styles at StyleList.com.
(http://www.stylelist.com/trends?ncid=aolsty00050000000014)
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 |
|
Perhaps not related, but try running your Briggs on 100LL and see how
long it is until a valve sticks. It won't be long.
Do not archive
----- Original Message -----
From: Catz631@aol.com
To: kitfox-list@matronics.com
Sent: Saturday, September 13, 2008 9:25 AM
Subject: Re: Kitfox-List: Jabiru
Jeff,
I agree whole heartily with you. I used to fly P-3's with the T56. I
also had a few engine failures.
My lawnmower with the Briggs, won't die. In fact it is rusted almost
all the way around the mower deck so that soon it will fall on the
ground and I bet it still runs. Very good analogy!
Dick Maddux
Fox 4-1200
Pensacola,Fl
-------------------------------------------------------------------------
-----
Psssst...Have you heard the news? There's a new fashion blog, plus the
latest fall trends and hair styles at StyleList.com.
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 |
|
You might be right, Dave, but I've talked to many pilots who say that
they save their drained 100LL (from sump checks, etc), and use it in
their mowers, etc, without any problem.
I sure won't be using it in my PT Cruiser, but I may try it in my mower.
Lynn Matteson
Kitfox IV Speedster
Jabiru 2200, 562 hrs...engine assembled and back in the plane;
waiting for new ignition system
Status: "Condition grounded, but determined to try." (Pink
Floyd..."Learning to Fly")
do not archive
On Sep 13, 2008, at 9:47 AM, Dave wrote:
> Perhaps not related, but try running your Briggs on 100LL and see
> how long it is until a valve sticks. It won't be long.
>
> Do not archive
> ----- Original Message -----
> From: Catz631@aol.com
> To: kitfox-list@matronics.com
> Sent: Saturday, September 13, 2008 9:25 AM
> Subject: Re: Kitfox-List: Jabiru
>
> Jeff,
> I agree whole heartily with you. I used to fly P-3's with the T56.
> I also had a few engine failures.
> My lawnmower with the Briggs, won't die. In fact it is rusted
> almost all the way around the mower deck so that soon it will fall
> on the ground and I bet it still runs. Very good analogy!
>
> Dick Maddux
> Fox 4-1200
> Pensacola,Fl
>
>
> Psssst...Have you heard the news? There's a new fashion blog, plus
> the latest fall trends and hair styles at StyleList.com.
> href="http://www.matronics.com/Navigator?Kitfox-List">http://
> www.matronhref="http://forums.matronics.com">http://
> forums.matronics.comhref="http://www.matronics.com/
> contribution">http://www.matronics.com/c_-
> ============================================================ _-
> http://www.matronics.com/Navigator?Kitfox-List_-
> ============================================================ _-
> forums.matronics.com_-
> ============================================================ _-
> contribution_-
> ===========================================================
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 |
|
Well OBVIOUSLY you made my point, you're simply changing oil in the
mower too often. It's too tight! If you go with the add only, change never
philosophy which I use you'll be able to run your mower on anything.
Mine is quite happy to run on 100LL which it does.
Jeff
> Perhaps not related, but try running your Briggs on 100LL and see how long it
is until a valve sticks. It won't be long.
>
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 4117#204117
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: | Re: 100 LL in Briggs and Stratton (way off topic) |
On Sat, September 13, 2008 6:47 am, Dave wrote:
> Perhaps not related, but try running your Briggs on 100LL and see how long it
is until
> a valve sticks. It won't be long.
I suspect that depends on the valve design. Here's why I say that; I have a fairly
old
Toro (1975 vintage) with, I think, a Tecumseh engine and it has a sticker on the
gas
tank that says "Warning Use Only Regular Leaded Gasoline - Use of Unleaded Gasoline
Will Void the Warranty." It runs on unleaded fine but it is so warn out the oil
smoke
burns my eyes when mowing. It has such low compression that it spins over freely
when
cold with no apparent compression. I can no longer start it with the recoil starter
cold. I use an electric drill motor with a 11/13" spark plug socked chucked on
it and
I put that on the flywheel and spin it up to 1200 rpm and it fires up in a cloud
of
smoke. It starts on the first pull when warm. It uses a quart of oil in one lawn
mowing. Have to top off the oil 3 or 4 times while using under a gallon of gas.
The
scroll case completely wore through and I laid up fiberglass to repair it. I now
have
a new Honda self propelled mower but that old Toro is so light weight that it is
super
for trimming around trees and beds.
I think it wasn't the type of gas that hosed the motor, I think it was using it
on a
steep sideslope while low on oil. Many years ago my son used it to mow neighbor's
lawns for some cash and didn't know about regular oil checking. He ran it nearly
empty
on oil mowing on a sideslope. Probably partially seized or got the rings so hot
they
relaxed. I think that because when it's warmed up, it has some compression. Cold
it
has none.
--
Paul A. Franz, P.E.
PAF Consulting Engineers
Office 425.440.9505
Cell 425.241.1618
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: | gsc props changing pitch in flight |
Has-anyone had-this happen to them,I have a 582 greyhead three blade gs
c wood prop and on my last fight ( 20 hrs so far on-prop) the-pitch cha
nged after take off-, it started to vibrate some,after landing I found th
at one blade had changed pitch so I adjusted it took-off----for a
-short flight and still it was off by two degrees, the half's seems to ha
ve very little gap if any- all torqued to 100in.Can I mill one half down
to get a space for gap between the half's or has anyone wrapped each blade
with something to make more gap I also found-some black dust around the s
pinner by that blade I checked the torque on all bolts all 100-I'm thinki
ng it might have no gap on that blade and it is slipping after full throttl
e , any help-- thanks- Jerry
Jerry Evans
KitfoxII
Magalia Calif.
N582'er'
kitfox 555
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: gsc props changing pitch in flight |
Jerry,
Here is the advice I took on the same subject of loose blades. I bought
an IVO. Cheap insurance.
Pete
Kitfox III sn 1000, 912, Grove, IVO prop
----- Original Message -----
From: skellander
To: apeterchristensen@sbcglobal.net
Sent: Saturday, April 05, 2008 9:38 PM
Subject: Re: Re: CGS Prop blades Loose
Pete, common problem on CGS props. I have about 400 hours behind
one and one blade finally turned in flight and drug my rpms way down.
The problem is the hubs are machined too close to tollerances so that
when the bolts are tightned to spec. the two hubs actually touch each
other which interferes with the squeazing of the blade hubs. This can
allow the blades to change pitch while in flight. Not catistrophic but
not desirable either.
I found when I disassembled my prop that one of the previous owners
put blue tape arround the blade hubs to get more "squeeze" on them when
the hub was tighted down. Many have taken the hub halfs to a machinist
and "shaved" a couple thousanths off each half. This allows the hub to
grab the blade hubs tighter. If your hub halfs touch each other when
the bolts are tightened this is the problem. Danger- over tightning
the hub bolts can also distort or crack the blade hubs and could result
in loss of a blade in flight.
Best solution is to hang the GCS on the wall and order an Ivo light
prop. All problems solved . Get a ground adjustable Ivo if you need
to fly under LSA rules. Changing pitch is super simple and the prop is
the smoothest one I've flown behind. Extremely duarable also.
If you need to fly yours a little more to get home you can try tape
on the hubs of the blades.
Good luck and let me know how you come out.
Steve Kellander
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 |
|
| Subject: | Re: Jabiru (engine choices) |
As far as the Rotax 912-S being harder to maintain, I am talking about syncing
the carbs, the pressure bleeding of the oil system after it has been opened up,
and the extra hoses and cooling system, etc etc... All of this is very easily
dealt with by someone that knows the 912-S, but there is a definite learning
curve with the 912-S. It seems even after owning this engine and flying it
for 2 years, I am always learning something new about it. My Continental 0200
with a single carb hanging off the bottom was much easier to to take care of,
and did not require half the knowledge, but it is also much heavier...
If I lost my oil pressure in my 912, I would land ASAP, as long as I could do it
without damage to the plane. If I was over an unlandable area, I would fly
to the nearest highway, or place I could get it down without damaging my plane.
It is much to easy to have an oil pressure sender fail, a wire break, etc
that would cause a false zero pressure indication, especially when there is no
secondary indication of increasing temperature, or oil all over the front of
the plane ! I have seen false Zero oil pressure indications a Turbine airplane.
Its far to common to tear up an airplane over.
I would be interested to hear your story Lowell, are you rebuilding your plane
?
Mike
--------
"NO FEAR" - If you have no fear you did not go as fast as you could
have !!!
Kolb MK-III Xtra, 912-S
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 4165#204165
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 |
|
Were your 15 LEDs wired in parallel or series or a combination of both?
Noel
-----Original Message-----
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Bill Hammond
Sent: Thursday, September 11, 2008 5:50 PM
Subject: Kitfox-List: Re: Lights
I, too, went the LED route when I figured out how many amps the Whelen
nav lights stole from the anemic 22 amps available on the Rotax 912S. I
built my own LED 'bulbs' to replace the incandescents bulbs supplied
with the Whelen. One of my criteria was not to modify the Whelen
fixture so that it could revert to its original configuration at any
time. The results are shown (about halfway down) my web page at
http://www.itsys3.com/kitfox/discover.shtml.
Bill Hammond
Parker, CO
Series 6, 912ULS, 550 flight hours
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 3830#203830
>
>
>
>
>
>
>
>
>
>
>
>
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: gsc props changing pitch in flight |
Jerry,
The same thing happened to me once. They say when the gap is gone it's
time to get a new blade, but mine looked good just not much gap left so
I sprayed a couple coats of auto clearcoat on that black end and that
took care of the slipping . I am not an expert on propellers but it
worked for me. I have a GSC 3 blade on my Model 1 532 and It works
great. Good luck
Dan Wild
Kansas
From: jerry evans
Sent: Saturday, September 13, 2008 3:58 PM
Subject: Kitfox-List: gsc props changing pitch in flight
Has anyone had this happen to them,I have a 582 greyhead three
blade gsc wood prop and on my last fight ( 20 hrs so far on prop) the
pitch changed after take off , it started to vibrate some,after landing
I found that one blade had changed pitch so I adjusted it took off
for a short flight and still it was off by two degrees, the half's seems
to have very little gap if any all torqued to 100in.Can I mill one half
down to get a space for gap between the half's or has anyone wrapped
each blade with something to make more gap I also found some black dust
around the spinner by that blade I checked the torque on all bolts all
100 I'm thinking it might have no gap on that blade and it is slipping
after full throttle , any help thanks Jerry
Jerry Evans
KitfoxII
Magalia Calif.
N582'er'
kitfox 555
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
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! --
|