Today's Message Index:
----------------------
1. 05:17 AM - Re: Tail wheel (rawheels)
2. 07:07 AM - Re: Tail wheelTail wheel (Catz631@AOL.COM)
3. 07:27 AM - Re: Tail wheel (Daniel Wild)
4. 07:39 AM - Re: Lynn's skis, trip to Oshkosh (Lynn Matteson)
5. 07:53 AM - Re: Tail wheelTail wheel (Lynn Matteson)
6. 08:48 AM - Re: Tail wheel (Lowell Fitt)
7. 10:00 AM - Re: Tail wheel (Lynn Matteson)
8. 10:25 AM - Re: Tail wheel (Lowell Fitt)
9. 10:58 AM - Re: Tail wheel (Lynn Matteson)
10. 11:04 AM - Re: Tail wheel (Noel Loveys)
11. 05:49 PM - Re: 912S Ignition Wiring Question (Peerenboom's)
12. 06:29 PM - Re: checking spark (Paul Franz - Merlin GT)
13. 06:35 PM - Re: 912S Ignition Wiring Question (CDE2fly@aol.com)
14. 06:49 PM - Re: 912S Ignition Wiring Question (Noel Loveys)
15. 06:49 PM - Re: Re: checking spark (CDE2fly@AOL.COM)
16. 07:10 PM - Re: Re: checking spark (Paul Franz - Merlin GT)
17. 11:09 PM - Some posting tips for the KF Forum (Paul Franz - Merlin GT)
Message 1
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How do you correct the situation in Fig 11 of http://www.bowersflybaby.com/tech/Maule_Tailwheel.pdf
Also, after 6 pages of posts I may be a little confused, but it would seem that
the tailwheel manufacturers would know what the correct angle for their tailwheels
to work would be, so unless you are trying to correct the shimmy problem
wouldn't the correct setup be with the king pin completely vertical in a loaded
aircraft config? When you mount any other castering wheel (cart, wagon, etc)
it gets mounted with the caster plate level with the bottom of the cart (makes
about a 30 deg angle). The maule tailwheel looks to be angled more (~40 deg),
but I would think the same priciple would apply. Maybe the tailwheel arms
have bent over time (I know the leaf spring that I replaced last year had),
and that is why the assembly needs to be shimmed/bent in order to get the original
mounting angle. So, maybe the true setup is to make sure that the tailwheel
arm is at the correct angle, not the pin?
--------
Ryan Wheeler
Kitfox IV-1200
Indianapolis, IN
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=225832#225832
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| Subject: | Re: Tail wheelTail wheel |
Frank,
Lynn Matteson does have a life and a very nice one at that. If you want to
see who he is pick up the November 2007 issue of Sport Pilot and you will see a
very nice article about him and his beautiful Kitfox. You will even see a
picture of him working on his engine in his underwear (my kind of guy, a true
devotee !) He has passion for this hobby and I do too!
It is colder than a witches ^$@ ! up where he lives and I believe he has a
bit of cabin fever and is unable to fly. When the weather gets warmer then we
will have more flying stories. Keep up the good work Lynn! I am 100% in your
corner (and I haven't even met you)
Dick Maddux
Fox 4-1200
Pensacola ,Fl
PS: I think I am getting a little tailwheel fatigue though, but that's ok
**************Inauguration '09: Get complete coverage from the nation's
Message 3
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Noel,
No I didn't damage my rudder. It didn't really snap all the way off. It
just folded up to the bottom of the rudder and my pedals wouldn't move
the rudder. I noticed this before I took off so I guess I was lucky
there. The new spring also made the king pin point too far forward so I
put a spacer between the spring and the tail wheel to change the angle.
I guess it would be nice to have one of those fancy adapters but It
worked pretty good last night when I flew around so for now I will leave
it. I also found some chain that looks just like the chain that was on
there at Home depot, I think the tensile strength was rated over
100lb's. do you think that is strong enough??
Dan
From: Noel Loveys
Sent: Monday, January 19, 2009 11:20 PM
Subject: RE: Kitfox-List: Tail wheel
Did you do any damage to your rudder?
Noel
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Daniel Wild
Sent: Monday, January 19, 2009 9:21 PM
Subject: Re: Kitfox-List: Tail wheel
Gary,
I have a Kitfox Model 1 and I just broke my spring last week so I have
been absorbing all this talk about springs. Please continue to post pics
on the group. There might be others out there interested. If people
aren't interested in this subject they don't have to read them.
Dan Wild
mdl1
532
From: gary.algate@sandvik.com
Sent: Monday, January 19, 2009 6:31 PM
Subject: RE: Kitfox-List: Tail wheel
Well I was going to post the fotos of my new setup plus results but
certainly don't want to offend Frank Miles or others - I'll send the
details off-line!
Regards
Gary
Gary Algate
Kitfox Classic Jab 2200
Office Phone: +61 8 8276 7655
This e-mail is confidential and it is intended only for the addressees.
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"This year, instead of sending you a Christmas card in the mail, we have
made a contribution to UNICEF Australia. We wish you a safe and happy
Christmas".
"Frank Miles" <f.miles.tcp.833@clearwire.net>
Sent by: owner-kitfox-list-server@matronics.com
20/01/2009 10:54 AM
Please respond to
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Subject
RE: Kitfox-List: Tail wheel
<f.miles.tcp.833@clearwire.net>
O.K - I can't stand it any more. I don't know who you are Lynn Matteson
but you must not have a life. I count 14 postings since 11:30 a.m. and
you
don't really have that much profound to say. Why don't you two or three
guys, as the kids use to say, get a room.
Frank Miles
Clarkston, Washington
K - III
-----Original Message-----
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Lynn
Matteson
Sent: Monday, January 19, 2009 4:03 PM
Subject: Re: Kitfox-List: Tail wheel
Excellent article, Guy....http://www.pierceaero.net/tws.php. Not
being an engineer (bad enough being a Michigander), I found it very
useful and informative. Notice all the theories therein....high tire
pressure, low tire pressure, forward tilt, backward tilt, etc...ya
gotta love it.
One thing I did object to though, was his spelling of the word
"caster" ...he likes "castor" as does Drew Fidoe, author of the oft-
mentioned "Maule article" The dictionary likes the use of caster (in
respect to the current subject), but gives a nod to castor being a
"variant" of caster. I prefer caster because that's the word I
learned way back when. I think of castor as being something too close
to being a cathartic, and also a close dictionary neighbor of
"castrate", which I also like to avoid.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 600.2 hrs
Sensenich 62x46
Electroair direct-fire ignition system
New skis done and flying
do not archive
On Jan 19, 2009, at 5:32 PM, Guy Buchanan wrote:
>
> At 09:54 AM 1/18/2009, you wrote:
>> Look at Gary's picture three. That is definitely extremely in the
>> wrong direction.
>> Reference the photo on page 17 of that Maule tailwheel writeup.
>
> I'm going to kick the nest, just to see if I can get some
> good data. I looked at the pdf, thinking it was a Maule document,
> but found it wasn't, so I'm not overly inclined to believe it, (or
> otherwise.) My configuration is as Lynn's, with the pivot
> "forward", meaning a line projected through the pivot to the ground
> intersects the ground forward of vertical. I use a Grove (gasp!)
> spring so there's no question of it flexing even under the load of
> my incredibly powerful physique. And yes, my plane taxis just fine
> at all speeds. Why?
> My conjecture during assembly was that the "forward"
> configuration minimized shimmy. Did I do any math? No. But here's
> my educated opinion: Shimmy is a resonance condition requiring mass
> for inertia, plus a restoring force for amplification. To amplify
> shimmy that restoring force wants to act at a time and in such a
> way to "amplify" the response. We have two cases to investigate:
>
> 1. Pivot "forward": (As above.) At rest, if the tailwheel turns the
> tail drops and the tailwheel wants to continue to turn up until it
> has turned 180 degrees. In motion, if the tailwheel turns, the
> moment offset between the contact patch and the pivot causes the
> wheel to want to return to centerline. The "tail drop" caused by
> the "forward" pivot tends to reduce this restorative force.
>
> 2. Pivot "aft" per http://www.bowersflybaby.com/tech/
> Maule_Tailwheel.pdf, page 17: At rest, if the tailwheel turns the
> tail lifts and the tailwheel wants to return to centerline. In
> motion the response is the same as in 1, above. The "tail lift"
> caused by the "aft" pivot tends to add to the restorative force.
>
> I won't address the case of the pivot being vertical,
> because that's nearly impossible to achieve. Now in case 2 there is
> more restorative force than case 1. I therefore speculated that
> because the shimmy was driven by the restorative force I'd have
> less likelihood of shimmy if I had a "forward" pivot.
> That was my logic and it left me, for whatever reason, with
> no shimmy. Now as you have probably guessed, I are an engineer,
> (though I don't play one on TV,) and I did due diligence via the
> Internet. What I found was that, not surprisingly, caster wheel
> shimmy, being a resonance phenomenon, does not lend itself to
> cookbook answers; there are simply too many variables involved.
> Oh, and I also found this: http://www.pierceaero.net/tws.php.
>
> Regards,
>
>
> Guy Buchanan
> San Diego, CA
> K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob -
The Kitfox-List Email Forum utilities such Browse, --> -
MATRONICS WEB FORUMS -->
========================<
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href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matron
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| Subject: | Re: Lynn's skis, trip to Oshkosh |
You might be right, Noel...sometimes these things just have a way of
working themselves out. : )
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 600.2 hrs
Sensenich 62x46
Electroair direct-fire ignition system
New skis done and flying
do not archive
On Jan 20, 2009, at 1:46 AM, Noel Loveys wrote:
>
> Lynn:
>
> You mentioned that the edges of your skis looked scalloped not as
> good as
> you would like... I was thinking about that and remembered that
> many knives
> have scalloped sides so meat or whatever won't stick to the sides
> of the
> knife... Those scallops on the edges of your skis, while they may
> not look
> nice, may actually improve the operation of the skis. Especially
> in deep
> snow.
>
> Noel
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| Subject: | Re: Tail wheelTail wheel |
And the article was even written by him, but he's too shy and
withdrawn to mention that part. : )
I'm sure he thanks you for the kind words, Dick.
Anonymous
do not archive
On Jan 20, 2009, at 10:06 AM, Catz631@aol.com wrote:
> Frank,
> Lynn Matteson does have a life and a very nice one at that. If you
> want to see who he is pick up the November 2007 issue of Sport
> Pilot and you will see a very nice article about him and his
> beautiful Kitfox. You will even see a picture of him working on his
> engine in his underwear (my kind of guy, a true devotee !) He has
> passion for this hobby and I do too!
> It is colder than a witches ^$@ ! up where he lives and I believe
> he has a bit of cabin fever and is unable to fly. When the weather
> gets warmer then we will have more flying stories. Keep up the good
> work Lynn! I am 100% in your corner (and I haven't even met you)
> Dick Maddux
> Fox 4-1200
> Pensacola ,Fl
> PS: I think I am getting a little tailwheel fatigue though, but
> that's ok
>
>
> Inauguration '09: Get _-
> www.matronics.com/contribution _-
> ===========================================================
Message 6
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For what it's worth, I copied Gary's JPG to my cad program and measured the
angle and it is 2.9 on the Matteson side of vertical. This done after
leveling the image in Photoshop with the joint on the concrete floor.
I had previously measured the original photo he posted the same way and it
measured 13.5.
I think this can relate to other aspects of flying, Angle of attack is good,
just don't take it too far. The fifteen to twenty degrees in the
aftermarket article? Not good advice. Gary with less than that found it
unmanageable.
Lowell
----- Original Message -----
From: <gary.algate@sandvik.com>
Sent: Monday, January 19, 2009 5:32 PM
Subject: RE: Kitfox-List: Tail wheel
Bob
I guess I was being petty and "spat the dummy" for those of you that are
not interested please press Delete "now".
I fitted the adaptor this morning and it brought the King Pin vertical
(see before and after Fotos).
Taxi tests and some circuits proved that all is good. No shimmy at any
taxi speed, good stable, longitudinal control yet not heavy on the pedals.
All that is required to unlatch the tailwheel now is a tap on the brakes
and/or full rudder deflection.
Gary Algate
SMC, Exploration
Office Phone: +61 8 8276 7655
Keep up the good discussion guys, never mind the cranks.
Bob Brennan - N717GB
ELSA Repairman, inspection rated
1991 UK Model 2 ELSA Kitfox
Rotax 582 with 3 blade prop
Wrightsville Pa
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of
gary.algate@sandvik.com
Sent: 19 January 2009 7:32 pm
Subject: RE: Kitfox-List: Tail wheel
Well I was going to post the fotos of my new setup plus results but
certainly don't want to offend Frank Miles or others - I'll send the
details off-line!
Regards
Gary
Gary Algate
Kitfox Classic Jab 2200
Office Phone: +61 8 8276 7655
This e-mail is confidential and it is intended only for the addressees.
Any review, dissemination, distribution, or copying of this message by
persons or entities other than the intended recipient is prohibited. If
you have received this e-mail in error, kindly notify us immediately by
telephone or e-mail and delete the message from your system. The sender
does not accept liability for any errors or omissions in the contents of
this message which may arise as a result of the e-mail transmission.
?This year, instead of sending you a Christmas card in the mail, we have
made a contribution to UNICEF Australia. We wish you a safe and happy
Christmas".
"Frank Miles" <f.miles.tcp.833@clearwire.net>
Sent by: owner-kitfox-list-server@matronics.com
20/01/2009 10:54 AM
Please respond to
kitfox-list@matronics.com
To
<kitfox-list@matronics.com>
cc
Subject
RE: Kitfox-List: Tail wheel
<f.miles.tcp.833@clearwire.net>
O.K - I can't stand it any more. I don't know who you are Lynn Matteson
but you must not have a life. I count 14 postings since 11:30 a.m. and you
don't really have that much profound to say. Why don't you two or three
guys, as the kids use to say, get a room.
Frank Miles
Clarkston, Washington
K - III
-----Original Message-----
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Lynn Matteson
Sent: Monday, January 19, 2009 4:03 PM
Subject: Re: Kitfox-List: Tail wheel
Excellent article, Guy....http://www.pierceaero.net/tws.php. Not
being an engineer (bad enough being a Michigander), I found it very
useful and informative. Notice all the theories therein....high tire
pressure, low tire pressure, forward tilt, backward tilt, etc...ya
gotta love it.
One thing I did object to though, was his spelling of the word
"caster" ...he likes "castor" as does Drew Fidoe, author of the oft-
mentioned "Maule article" The dictionary likes the use of caster (in
respect to the current subject), but gives a nod to castor being a
"variant" of caster. I prefer caster because that's the word I
learned way back when. I think of castor as being something too close
to being a cathartic, and also a close dictionary neighbor of
"castrate", which I also like to avoid.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 600.2 hrs
Sensenich 62x46
Electroair direct-fire ignition system
New skis done and flying
do not archive
On Jan 19, 2009, at 5:32 PM, Guy Buchanan wrote:
>
> At 09:54 AM 1/18/2009, you wrote:
>> Look at Gary's picture three. That is definitely extremely in the
>> wrong direction.
>> Reference the photo on page 17 of that Maule tailwheel writeup.
>
> I'm going to kick the nest, just to see if I can get some
> good data. I looked at the pdf, thinking it was a Maule document,
> but found it wasn't, so I'm not overly inclined to believe it, (or
> otherwise.) My configuration is as Lynn's, with the pivot
> "forward", meaning a line projected through the pivot to the ground
> intersects the ground forward of vertical. I use a Grove (gasp!)
> spring so there's no question of it flexing even under the load of
> my incredibly powerful physique. And yes, my plane taxis just fine
> at all speeds. Why?
> My conjecture during assembly was that the "forward"
> configuration minimized shimmy. Did I do any math? No. But here's
> my educated opinion: Shimmy is a resonance condition requiring mass
> for inertia, plus a restoring force for amplification. To amplify
> shimmy that restoring force wants to act at a time and in such a
> way to "amplify" the response. We have two cases to investigate:
>
> 1. Pivot "forward": (As above.) At rest, if the tailwheel turns the
> tail drops and the tailwheel wants to continue to turn up until it
> has turned 180 degrees. In motion, if the tailwheel turns, the
> moment offset between the contact patch and the pivot causes the
> wheel to want to return to centerline. The "tail drop" caused by
> the "forward" pivot tends to reduce this restorative force.
>
> 2. Pivot "aft" per http://www.bowersflybaby.com/tech/
> Maule_Tailwheel.pdf, page 17: At rest, if the tailwheel turns the
> tail lifts and the tailwheel wants to return to centerline. In
> motion the response is the same as in 1, above. The "tail lift"
> caused by the "aft" pivot tends to add to the restorative force.
>
> I won't address the case of the pivot being vertical,
> because that's nearly impossible to achieve. Now in case 2 there is
> more restorative force than case 1. I therefore speculated that
> because the shimmy was driven by the restorative force I'd have
> less likelihood of shimmy if I had a "forward" pivot.
> That was my logic and it left me, for whatever reason, with
> no shimmy. Now as you have probably guessed, I are an engineer,
> (though I don't play one on TV,) and I did due diligence via the
> Internet. What I found was that, not surprisingly, caster wheel
> shimmy, being a resonance phenomenon, does not lend itself to
> cookbook answers; there are simply too many variables involved.
> Oh, and I also found this: http://www.pierceaero.net/tws.php.
>
> Regards,
>
>
> Guy Buchanan
> San Diego, CA
> K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob -
The Kitfox-List Email Forum utilities such Browse, --> -
MATRONICS WEB FORUMS --> ========================< - List
Contribution Web Site
href="http://www.matronics.com/Navigator?Kitfox-List
">http://www.matronhref="http://forums.matronics.com
">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
Message 7
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I just did the same thing Lowell...set the joint level by rotating
the picture 1.5 degrees clockwise, and it looks to me like the top
of the kingpin points to the front of the plane, not toward the rear
like mine does. I dropped a line from the center of the kingpin nut
(as close to center as I could), and it looks like the kingpin top
points forward, doesn't it?
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 600.2 hrs
Sensenich 62x46
Electroair direct-fire ignition system
New skis done and flying
On Jan 20, 2009, at 11:44 AM, Lowell Fitt wrote:
> <lcfitt@sbcglobal.net>
>
> For what it's worth, I copied Gary's JPG to my cad program and
> measured the angle and it is 2.9 on the Matteson side of
> vertical. This done after leveling the image in Photoshop with the
> joint on the concrete floor.
>
> I had previously measured the original photo he posted the same way
> and it measured 13.5.
>
> I think this can relate to other aspects of flying, Angle of attack
> is good, just don't take it too far. The fifteen to twenty degrees
> in the aftermarket article? Not good advice. Gary with less than
> that found it unmanageable.
>
> Lowell
Message 8
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Good move, Lynn, You are correct - my bad.
Lowell
----- Original Message -----
From: "Lynn Matteson" <lynnmatt@jps.net>
Sent: Tuesday, January 20, 2009 9:58 AM
Subject: Re: Kitfox-List: Tail wheel
>
> I just did the same thing Lowell...set the joint level by rotating the
> picture 1.5 degrees clockwise, and it looks to me like the top of the
> kingpin points to the front of the plane, not toward the rear like mine
> does. I dropped a line from the center of the kingpin nut (as close to
> center as I could), and it looks like the kingpin top points forward,
> doesn't it?
>
>
> Lynn Matteson
> Kitfox IV Speedster, taildragger
> Jabiru 2200, #2062, 600.2 hrs
> Sensenich 62x46
> Electroair direct-fire ignition system
> New skis done and flying
>
>
> On Jan 20, 2009, at 11:44 AM, Lowell Fitt wrote:
>
>>
>> For what it's worth, I copied Gary's JPG to my cad program and measured
>> the angle and it is 2.9 on the Matteson side of vertical. This done
>> after leveling the image in Photoshop with the joint on the concrete
>> floor.
>>
>> I had previously measured the original photo he posted the same way and
>> it measured 13.5.
>>
>> I think this can relate to other aspects of flying, Angle of attack is
>> good, just don't take it too far. The fifteen to twenty degrees in the
>> aftermarket article? Not good advice. Gary with less than that found
>> it unmanageable.
>>
>> Lowell
>
>
>
Message 9
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Hold the presses.....we are BOTH assuming that the plane was rolled
into the building with the centerline of the plane parallel to the
joint in the floor, which it may not be. Imagine if the joint was at
a 45 angle in the picture, and we level the joint.....now we've got
one wild a-- angle on the tailwheel assembly. I think we better take
Gary's word for the new angle, if he can measure it.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 600.2 hrs
Sensenich 62x46
Electroair direct-fire ignition system
New skis done and flying
do not archive
On Jan 20, 2009, at 1:21 PM, Lowell Fitt wrote:
> <lcfitt@sbcglobal.net>
>
> Good move, Lynn, You are correct - my bad.
>
> Lowell
> ----- Original Message ----- From: "Lynn Matteson" <lynnmatt@jps.net>
> To: <kitfox-list@matronics.com>
> Sent: Tuesday, January 20, 2009 9:58 AM
> Subject: Re: Kitfox-List: Tail wheel
>
>
>>
>> I just did the same thing Lowell...set the joint level by
>> rotating the picture 1.5 degrees clockwise, and it looks to me
>> like the top of the kingpin points to the front of the plane, not
>> toward the rear like mine does. I dropped a line from the center
>> of the kingpin nut (as close to center as I could), and it looks
>> like the kingpin top points forward, doesn't it?
>>
>>
>> Lynn Matteson
>> Kitfox IV Speedster, taildragger
>> Jabiru 2200, #2062, 600.2 hrs
>> Sensenich 62x46
>> Electroair direct-fire ignition system
>> New skis done and flying
>>
>>
>>
>>
>> On Jan 20, 2009, at 11:44 AM, Lowell Fitt wrote:
>>
>>> <lcfitt@sbcglobal.net>
>>>
>>> For what it's worth, I copied Gary's JPG to my cad program and
>>> measured the angle and it is 2.9 on the Matteson side of
>>> vertical. This done after leveling the image in Photoshop with
>>> the joint on the concrete floor.
>>>
>>> I had previously measured the original photo he posted the same
>>> way and it measured 13.5.
>>>
>>> I think this can relate to other aspects of flying, Angle of
>>> attack is good, just don't take it too far. The fifteen to
>>> twenty degrees in the aftermarket article? Not good advice.
>>> Gary with less than that found it unmanageable.
>>>
>>> Lowell
>>
>>
>>
>>
>>
>
>
Message 10
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100lb. test should be strong enough. Strain on the chains is limited by the
springs and the steering lock release. But like all things aircraft, keep
a critical eye on it. When I was in school one of my instructors said no
inspection was complete without finding at least one fault.... My problem
is I tend to find several... not all require immediate action though or I'd
never get into the air.
Noel
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Daniel Wild
Sent: Tuesday, January 20, 2009 11:57 AM
Subject: Re: Kitfox-List: Tail wheel
Noel,
No I didn't damage my rudder. It didn't really snap all the way off. It just
folded up to the bottom of the rudder and my pedals wouldn't move the
rudder. I noticed this before I took off so I guess I was lucky there. The
new spring also made the king pin point too far forward so I put a spacer
between the spring and the tail wheel to change the angle. I guess it would
be nice to have one of those fancy adapters but It worked pretty good last
night when I flew around so for now I will leave it. I also found some chain
that looks just like the chain that was on there at Home depot, I think the
tensile strength was rated over 100lb's. do you think that is strong
enough??
Dan
From: Noel Loveys <mailto:noelloveys@yahoo.ca>
Sent: Monday, January 19, 2009 11:20 PM
Subject: RE: Kitfox-List: Tail wheel
Did you do any damage to your rudder?
Noel
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Daniel Wild
Sent: Monday, January 19, 2009 9:21 PM
Subject: Re: Kitfox-List: Tail wheel
Gary,
I have a Kitfox Model 1 and I just broke my spring last week so I have been
absorbing all this talk about springs. Please continue to post pics on the
group. There might be others out there interested. If people aren't
interested in this subject they don't have to read them.
Dan Wild
mdl1
532
From: gary.algate@sandvik.com
Sent: Monday, January 19, 2009 6:31 PM
Subject: RE: Kitfox-List: Tail wheel
Well I was going to post the fotos of my new setup plus results but
certainly don't want to offend Frank Miles or others - I'll send the
details off-line!
Regards
Gary
Gary Algate
Kitfox Classic Jab 2200
Office Phone: +61 8 8276 7655
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Sent by: owner-kitfox-list-server@matronics.com
20/01/2009 10:54 AM
Please respond to
kitfox-list@matronics.com
To
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cc
Subject
RE: Kitfox-List: Tail wheel
<f.miles.tcp.833@clearwire.net>
O.K - I can't stand it any more. I don't know who you are Lynn Matteson
but you must not have a life. I count 14 postings since 11:30 a.m. and you
don't really have that much profound to say. Why don't you two or three
guys, as the kids use to say, get a room.
Frank Miles
Clarkston, Washington
K - III
-----Original Message-----
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Lynn Matteson
Sent: Monday, January 19, 2009 4:03 PM
Subject: Re: Kitfox-List: Tail wheel
Excellent article, Guy....http://www.pierceaero.net/tws.php. Not
being an engineer (bad enough being a Michigander), I found it very
useful and informative. Notice all the theories therein....high tire
pressure, low tire pressure, forward tilt, backward tilt, etc...ya
gotta love it.
One thing I did object to though, was his spelling of the word
"caster" ...he likes "castor" as does Drew Fidoe, author of the oft-
mentioned "Maule article" The dictionary likes the use of caster (in
respect to the current subject), but gives a nod to castor being a
"variant" of caster. I prefer caster because that's the word I
learned way back when. I think of castor as being something too close
to being a cathartic, and also a close dictionary neighbor of
"castrate", which I also like to avoid.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 600.2 hrs
Sensenich 62x46
Electroair direct-fire ignition system
New skis done and flying
do not archive
On Jan 19, 2009, at 5:32 PM, Guy Buchanan wrote:
>
> At 09:54 AM 1/18/2009, you wrote:
>> Look at Gary's picture three. That is definitely extremely in the
>> wrong direction.
>> Reference the photo on page 17 of that Maule tailwheel writeup.
>
> I'm going to kick the nest, just to see if I can get some
> good data. I looked at the pdf, thinking it was a Maule document,
> but found it wasn't, so I'm not overly inclined to believe it, (or
> otherwise.) My configuration is as Lynn's, with the pivot
> "forward", meaning a line projected through the pivot to the ground
> intersects the ground forward of vertical. I use a Grove (gasp!)
> spring so there's no question of it flexing even under the load of
> my incredibly powerful physique. And yes, my plane taxis just fine
> at all speeds. Why?
> My conjecture during assembly was that the "forward"
> configuration minimized shimmy. Did I do any math? No. But here's
> my educated opinion: Shimmy is a resonance condition requiring mass
> for inertia, plus a restoring force for amplification. To amplify
> shimmy that restoring force wants to act at a time and in such a
> way to "amplify" the response. We have two cases to investigate:
>
> 1. Pivot "forward": (As above.) At rest, if the tailwheel turns the
> tail drops and the tailwheel wants to continue to turn up until it
> has turned 180 degrees. In motion, if the tailwheel turns, the
> moment offset between the contact patch and the pivot causes the
> wheel to want to return to centerline. The "tail drop" caused by
> the "forward" pivot tends to reduce this restorative force.
>
> 2. Pivot "aft" per http://www.bowersflybaby.com/tech/
> Maule_Tailwheel.pdf, page 17: At rest, if the tailwheel turns the
> tail lifts and the tailwheel wants to return to centerline. In
> motion the response is the same as in 1, above. The "tail lift"
> caused by the "aft" pivot tends to add to the restorative force.
>
> I won't address the case of the pivot being vertical,
> because that's nearly impossible to achieve. Now in case 2 there is
> more restorative force than case 1. I therefore speculated that
> because the shimmy was driven by the restorative force I'd have
> less likelihood of shimmy if I had a "forward" pivot.
> That was my logic and it left me, for whatever reason, with
> no shimmy. Now as you have probably guessed, I are an engineer,
> (though I don't play one on TV,) and I did due diligence via the
> Internet. What I found was that, not surprisingly, caster wheel
> shimmy, being a resonance phenomenon, does not lend itself to
> cookbook answers; there are simply too many variables involved.
> Oh, and I also found this: http://www.pierceaero.net/tws.php.
>
> Regards,
>
>
> Guy Buchanan
> San Diego, CA
> K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob - The
Kitfox-List Email Forum utilities such Browse, --> -
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Message 11
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| Subject: | Re: 912S Ignition Wiring Question |
Other than ohm meter checks or the people at Lockwood have a tester of
some sort I do not know of a recommended way. I had a starting problem
that drove me nuts, I ohms checked everything but when I would call
about a spark check they all would tell me I'm going to blow my ignition
boxes. I did get my engine started fuel mixture issue. Do you think you
have a problem?
Paul
N120DG 912UL 350TT
----- Original Message -----
From: CDE2fly@aol.com
To: kitfox-list@matronics.com
Sent: Sunday, January 18, 2009 7:36 PM
Subject: Re: Kitfox-List: 912S Ignition Wiring Question
Thanks Paul - is there a recommended way to check that the plugs are
firing? I can forward pictures of my wiring arrangement if that would
be hlepful.
Chris
Nearly complete Model 7 912S
-------------------------------------------------------------------------
-----
Inauguration '09: Get complete coverage from the nation's capital.
Message 12
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| Subject: | Re: checking spark |
On Tue, January 20, 2009 5:48 pm, Peerenboom's wrote:
> Other than ohm meter checks or the people at Lockwood have a tester of some sort
I do
> not know of a recommended way.
Maybe I'm missing something here, but just using an ordinary timing light with
or
without an inductive pickup about the easiest way to check spark. You don't have
to
remove a plug and there is no risk of damaging the ignition primary side (low voltage
side) with a disconnected spark plug wire.
That's how I do it easily enough.
--
Paul A. Franz
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell
Message 13
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| Subject: | Re: 912S Ignition Wiring Question |
Paul:
I did some additional trouble shooting and the ignition and starting
circuits are functioning correctly as far as the key positions are concerned.
I
spoke with John McBean at Kitfox Aircraft and he checked the resistance on the
magneto pin from the ignition module wire harness plug on his 912S and had +/-
300 ohms. I confirmed the same resistance on my pin.
After discussing with John, we concluded the best approach would be to add
some fuel to the tank and see if it will start. Just seems strange that there
is NO visible spark even in near total darkness. John also indicated that
checking the spark visually by grounding the plug body with it out of the
engine is not advised with the electronic ignition.
I plan to try a first start this weekend so I'll report on my findings.
Thanks for your help and advise.
Chris
Kitfox 7 - 912S
**************Inauguration '09: Get complete coverage from the nation's
capital. (http://news.aol.com/main/politics/inauguration?ncid=emlcntusnews00000003)
Message 14
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| Subject: | 912S Ignition Wiring Question |
You could use an inductive tach like the TinyTach. The induction wire just
wraps around the high tension lead to be tested. If you see any reading on
the tach then you have firing on that wire. No chance of blowing an
ignition box.
Noel
From: owner-kitfox-list-server@matronics.com
[mailto:owner-kitfox-list-server@matronics.com] On Behalf Of Peerenboom's
Sent: Tuesday, January 20, 2009 10:18 PM
Subject: Re: Kitfox-List: 912S Ignition Wiring Question
Other than ohm meter checks or the people at Lockwood have a tester of some
sort I do not know of a recommended way. I had a starting problem that drove
me nuts, I ohms checked everything but when I would call about a spark check
they all would tell me I'm going to blow my ignition boxes. I did get my
engine started fuel mixture issue. Do you think you have a problem?
Paul
N120DG 912UL 350TT
----- Original Message -----
From: CDE2fly@aol.com
Sent: Sunday, January 18, 2009 7:36 PM
Subject: Re: Kitfox-List: 912S Ignition Wiring Question
Thanks Paul - is there a recommended way to check that the plugs are firing?
I can forward pictures of my wiring arrangement if that would be hlepful.
Chris
Nearly complete Model 7 912S
_____
Inauguration '09: Get complete
<http://news.aol.com/main/politics/inauguration?ncid=emlcntusnews00000003>
coverage from the nation's capital.
href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronhref
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href="http://www.matronics.com/contribution">http://www.matronics.com/c
Message 15
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| Subject: | Re: checking spark |
Paul - this sounds like a great idea. So the procedure would be to clamp
the inductive pick-up to any of the plug wires (all plugs still in the engine)
and turn the engine with the starter/battery to see if the strobe on the
timing light flashes?
**************Inauguration '09: Get complete coverage from the nation's
capital. (http://news.aol.com/main/politics/inauguration?ncid=emlcntusnews00000003)
Message 16
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| Subject: | Re: checking spark |
On Tue, January 20, 2009 6:48 pm, CDE2fly@aol.com wrote:
> Paul - this sounds like a great idea. So the procedure would be to clamp
> the inductive pick-up to any of the plug wires (all plugs still in the engine)
> and turn the engine with the starter/battery to see if the strobe on the
> timing light flashes?
Yes, that's perfect. Even if your timing light doesn't have an inductive pickup,
it
only adds the step of removing the spark plug wire or possibly only the protective
cover and connecting the timing light. Mine is DC powered and the big wire on the
starter is pretty handy for the positive connector and connect the black to any
good
ground on the engine.
These modern ignition systems make only minimal spark so I'm not surprised you
can't
see it even in dim light. I can't even see it on my Ford F-150 with a plug out
but the
timing light picks it up fine.
--
Paul A. Franz
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell
Message 17
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| Subject: | Some posting tips for the KF Forum |
If you've been a bit confused about composing a posting using the Forum interface
on
Matronics this should be a big help.
<http://forums.matronics.com/faq.php?mode=bbcode>
You can't use html tags and constructs but rather you use what the phpBB developers
call BB Codes.
For example, if I compose a posting as plain text via e-mail submission I would
designate an html link enclosed in a <> symbol pair like this:
<http://www.youtube.com/watch?v=MnjyhCQYnRo>
And that appears here just fine but it I were to do that in a forum post, it would
get
mangled and all that would appear is
http
Not something that you intend at all. That's because html tags aren't allowed.
But you
can do something like this in the Forum interface:
[url=http://www.youtube.com/watch?v=MnjyhCQYnRo]Peterbilt Truck Interior[/url]
And the text will appear as a live link in your posting.
Quoting, ordered lists, text size and color and a few other common tasks are covered.
If you use the Forum interface to the list, you can post pictures and they will
be
mailed as URLs to the KF Maillist, greatly reducing the e-mail traffic. You also
can
read all the postings and see all the photos as well by using the forum. In fact
you
don't even have to be subscribed to any mail list to read the postings. You do
need to
register if you are going to post. That's true even if you are on a Matronics mail
list.
You can read the KF List postings directly by clicking this link:
<http://forums.matronics.com/viewforum.php?f=8>
And if you had wanted to post that link in the KF Forum you'd do it this way:
[url=http://forums.matronics.com/viewforum.php?f=8]Kitfox Forum[/url]
But it would look much nicer.
--
Paul A. Franz
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell
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