Today's Message Index:
----------------------
1. 02:35 AM - Re: Nose wheel pressure (Kane, Thomas G)
2. 04:56 AM - Nose Wheel Shimmy ()
3. 07:24 AM - Re: Nose wheel pressure (Ray Wilhelm)
4. 10:10 AM - Re: MATCO Brakes For Sale (sonja.englert@juno.com)
5. 11:07 AM - Re: Nose wheel pressure (Brian Anderson)
6. 02:12 PM - Re: HELP!!!! (HUGH COULTER)
7. 02:30 PM - Re: HELP!!!! (Casey King)
Message 1
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| Subject: | Re: Nose wheel pressure |
Dear Brian,
No, I currently don't have a need. The bolt carrier on the M-16 rifle has
a fluid inside the bolt that dampens its travel to the rear when the rifle
is fired. That concept started me thinking. The amount of space inside t
he pipe available for fluid movement and the viscosity of the fluid are fac
tors in dampening. Since the Pulsar nose wheel shimmy problem varies with
speed, an exact solution at a specific speed in not required. Anything to
decrease high-speed lateral movement of the wheel pant should be helpful.
If a heavy oil does not provide acceptable results then a more viscous liq
uid should be substituted. I don't think anyone knows how fast the nose wh
eel moves so experimentation may be needed.
Tom.
--
Tom Kane
407 Nob Hill Drive
Stafford, Virginia 22556
N17575, Pulsar XP, Rotax 912
540.752-1509 home
703.624-2833 cell
703.845-2404 work
On 1/12/11 6:41 PM, "Brian Anderson" <briana@xtra.co.nz> wrote:
Hi Tom,
Well that sounds like an original idea. So the oil acts as a mass that tend
s to stay stationary as the wheel oscillate back and forth. Have you tried
this system. It would be easy to implement.
Brian
On 13/01/2011, at 10:55 AM, Kane, Thomas G wrote:
Dear Brian,
Nose wheel shimmy can be reduced with the installation of a fluid damper mo
unted perpendicular to the direction of travel inside the wheel pant. A sm
all piece of PVC/PCV pipe capped on both ends and partially filled with hea
vy oil such as automotive differential gear oil can be used. Mount the dam
per inside the wheel pant behind the nose wheel. When the wheel pant moves
to the left the oil will move to the right.
Tom.
Message 2
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| Subject: | Nose Wheel Shimmy |
1/13/2011
Hello Brian, You wrote: "Has anyone thought of a good way to have nice
linear friction in the last 10 years?"
I have had good results using nylon washers.
You can make the size needed out of nylon sheet using different size hole
saws if you can not find ready made nylon washers of the correct thickness
and size.
'OC' Baker Says: "The best investment we can make is the time and effort to
gather and understand knowledge."
========================================================
Time: 11:09:42 AM PST US
Subject: Pulsar-List: Nose wheel pressure
From: Brian Anderson <briana@xtra.co.nz>
I'm doing another annual inspection, the 10th one now, and inflating the
tyres
in the process. I fitted new main tyres and tubes a year ago and have only
had
to re-inflate once in that time, and even now the pressure has been
maintained
pretty well. Previously I had to pump the mains up about every 3 months.
>From time to time I still experience a little nosewheel shimmy. I have some
>friction
on the pivot, but maybe not quite enough. Landing too fast is probably
the major contributor, but I always try to hold the nosewheel off as long as
possible.
The question is - - does the tyre pressure in the nosewheel make any
difference. I can't say I have noticed it one way or the other. Usually I
put
about 30 psi in the nosewheel and when I checked yesterday, after a year it
was
down to about 20 psi. [By the way, it is the larger nosewheel that came with
the later Aero Design kits, but with an Asusa aluminium wheel]. If there was
some certainty about whether the nosewheel pressure made a difference I
would
be more careful to maintain it in the right region.
I had a deal of difficulty getting any friction system to work effectively.
I have
the original Aero Designs nose leg, but with a later Skystar cast aluminium
fork. The reason for the change is that the kit supplied fork was drilled at
an angle so the nosewheel was mis-aligned. The later fork is thicker at the
pivot
point, and also needed to be sleeved for the smaller pivot pin. The
additional
thickness leaves very little room for Bellville washers so I had to
improvise
with a single slimmed down version. Hence one flat on the securing nut makes
a big difference to the friction, and it is impossible to get it just right.
It's either too tight for taxiing or too loose for shimmy.
Has anyone thought of a good way to have nice linear friction in the last 10
years
?
Brian
Message 3
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| Subject: | Re: Nose wheel pressure |
On my Pulsar III I used 2 viscous springs like they use on the tailgate
of many hatchbacks. One on each side of the nose gear where the gear
attaches to the shock mount, the other ends connect to the firewall at
the motor mount. Helped a lot.
Ray Pulsar III/3300
Message 4
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| Subject: | Re: MATCO Brakes For Sale |
Randy,
I may be interested in the wheels and brakes. Can you send me pictures?
Thanks,
Sonja
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Message 5
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| Subject: | Re: Nose wheel pressure |
Hi Tom,
It sounds like an idea worth thinking about. I'll have another look at
the wheel pant today and see how much room is available. It seems the
viscosity needn't be too high, and the tube not filled, otherwise it
would act as a solid mass. Perhaps the idea is allowing the tube to move
sideways with the wheel pant - - leaving the fluid behind, then when the
fluid builds up on one side and the end of the tube catches up it adds
mass and slows the movement of the wheel pant.
I'll try to do some more research.
Regards,
Brian
On 13/01/2011, at 11:30 PM, Kane, Thomas G wrote:
> Dear Brian,
> No, I currently don=92t have a need. The bolt carrier on the M-16
rifle has a fluid inside the bolt that dampens its travel to the rear
when the rifle is fired. That concept started me thinking. The amount
of space inside the pipe available for fluid movement and the viscosity
of the fluid are factors in dampening. Since the Pulsar nose wheel
shimmy problem varies with speed, an exact solution at a specific speed
in not required. Anything to decrease high-speed lateral movement of
the wheel pant should be helpful. If a heavy oil does not provide
acceptable results then a more viscous liquid should be substituted. I
don=92t think anyone knows how fast the nose wheel moves so
experimentation may be needed.
> Tom.
> --
> Tom Kane
> 407 Nob Hill Drive
> Stafford, Virginia 22556
> N17575, Pulsar XP, Rotax 912
> 540.752-1509 home
> 703.624-2833 cell
> 703.845-2404 work
>
>
>
> On 1/12/11 6:41 PM, "Brian Anderson" <briana@xtra.co.nz> wrote:
>
> Hi Tom,
>
> Well that sounds like an original idea. So the oil acts as a mass that
tends to stay stationary as the wheel oscillate back and forth. Have you
tried this system. It would be easy to implement.
>
> Brian
>
>
> On 13/01/2011, at 10:55 AM, Kane, Thomas G wrote:
>
> Dear Brian,
> Nose wheel shimmy can be reduced with the installation of a fluid
damper mounted perpendicular to the direction of travel inside the wheel
pant. A small piece of PVC/PCV pipe capped on both ends and partially
filled with heavy oil such as automotive differential gear oil can be
used. Mount the damper inside the wheel pant behind the nose wheel.
When the wheel pant moves to the left the oil will move to the right.
> Tom.
>
>
>
Message 6
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On Sun, 2 Jan 2011 10:47:02 -0600
Casey King <cking@lifesize.com> wrote:
><cking@lifesize.com>
>
> Doug-
>
> Quick answers to your questions.
>
> 1. Yes. With the simple exception that it should be
>addressed to
>pulsar-list@matronics.com<mailto:pulsar-list@matronics.com>.
> 2. No. The 300 members of the pulsar-builders list were
>transferred. You don't have to do anything to sign up.
> 3&4. No. The yahoo list is still in existence.
>
> This list is a replacement for the old
>pulsar-builders@caseyk.org<mailto:pulsar-builders@caseyk.org>
>list. Thanks again to Matt for moving the names.
>
> -Casey
>
> On Jan 2, 2011, at 9:14 AM, Edinburg News wrote:
>
> OK Lets see if I can get all this strait!!
> 1. Do we just do what we always have been doing
>regarding e-mail?
> 2. Do we have to do anything as far as signing up again
>or anything (after checking the first 5 name pages of 48
>I gave up I dont think we have 3590 members in our
>group)??
> 3. Is the old Yahoo page now defunct (can we use it
>still)???
> 4. Is all the old stuff on the Yahoo page been
>transferred to here (wherever here is)????
>
> I have read most of the information sheets that were
>sent, but my old 65 year old brain hasnt quite
>assimilated it all yet. Just tell me anything I need to
>do different than before. Please excuse my ignorance but
>I dont do much social networking and am not familiar
>with all the nuances involved.
>
> Thanks, Doug N582DS
>
> Casey
How do I address the net?
Clarke
>
>
>
>
>
>
>
>Un/Subscription,
>Forums!
>Admin.
>
>
>
Message 7
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You just did.
On Jan 13, 2011, at 4:09 PM, HUGH COULTER wrote:
>
> On Sun, 2 Jan 2011 10:47:02 -0600
> Casey King <cking@lifesize.com> wrote:
>> <cking@lifesize.com>
>>
>> Doug-
>>
>> Quick answers to your questions.
>>
>> 1. Yes. With the simple exception that it should be
>> addressed to
>> pulsar-list@matronics.com<mailto:pulsar-list@matronics.com>.
>> 2. No. The 300 members of the pulsar-builders list were
>> transferred. You don't have to do anything to sign up.
>> 3&4. No. The yahoo list is still in existence.
>>
>> This list is a replacement for the old
>> pulsar-builders@caseyk.org<mailto:pulsar-builders@caseyk.org>
>> list. Thanks again to Matt for moving the names.
>>
>> -Casey
>>
>> On Jan 2, 2011, at 9:14 AM, Edinburg News wrote:
>>
>> OK Lets see if I can get all this strait!!
>> 1. Do we just do what we always have been doing
>> regarding e-mail?
>> 2. Do we have to do anything as far as signing up again
>> or anything (after checking the first 5 name pages of 48
>> I gave up I dont think we have 3590 members in our
>> group)??
>> 3. Is the old Yahoo page now defunct (can we use it
>> still)???
>> 4. Is all the old stuff on the Yahoo page been
>> transferred to here (wherever here is)????
>>
>> I have read most of the information sheets that were
>> sent, but my old 65 year old brain hasnt quite
>> assimilated it all yet. Just tell me anything I need to
>> do different than before. Please excuse my ignorance but
>> I dont do much social networking and am not familiar
>> with all the nuances involved.
>>
>> Thanks, Doug N582DS
>>
>> Casey
>
> How do I address the net?
>
> Clarke
>>
>>
>>
>>
>>
>>
>>
>> Un/Subscription,
>> Forums!
>> Admin.
>>
>>
>>
>
>
>
>
>
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