gmane.culture.transportation.humanpowered.trikes

Fwd: MY NEW PRIMARY PHYSICIAN

2012-02-06T21:28:25

Please note: forwarded message attached

From: doug <dougo56x< at >yahoo.com>
To: undisclosed recipients: ;
Subject: Fwd: MY NEW PRIMARY PHYSICIAN
Date: Mon, 6 Feb 2012 07:42:31 -0800 (PST)

____________________________________________________________
53 Year Old Mom Looks 33
The Stunning Results of Her Wrinkle Trick Has Botox Doctors Worried
http://thirdpartyoffers.juno.com/TGL3131/4f30463c50978951cd3st03vuc--
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Fw: Re: a short story for engineers

2012-01-22T22:22:02

---------- Forwarded Message ----------
From: doug <dougo56x< at >yahoo.com>
To: Karen Whiting <buful1943< at >gmail.com>
Subject: Re: a short story for engineers
Date: Thu, 19 Jan 2012 06:52:41 -0800 (PST)

 A Short Story for Engineers

A toothpaste factory had a problem: they sometimes shipped empty boxes,
without the tube inside. This was due to the way the production line was
set up, and people with experience in designing production lines will tell
you how difficult it is to have everything happen with timings so precise
that every single unit coming out of it is perfect 100% of the time.

Small variations in the environment (which can't be controlled in a
cost-effective fashion) mean you must have quality assurance checks smartly distributed
across the line so that customers all the way down to the supermarket
don't get pissed off and buy another product instead.

Understanding how important that was, the CEO of the toothpaste factory
got the top people in the company together and they decided to start a new
project, in which they would hire an external engineering company to
solve their empty boxes problem, as their engineering department was already
too stretched to take on any extra effort.

The project followed the usual process: budget and project sponsor
allocated, RFP, third-parties selected, and six months (and $8 million)
later they had a fantastic solution - on time, on budget, high quality
and everyone in the project had a great time. They solved the problem by
using
high-tech precision scales that would sound a bell and flash lights
whenever a toothpaste box would weigh less than it should. The line would stop,
and someone had to walk over and yank the defective box out of it, pressing
another button when done to re-start the line.

A while later, the CEO decides to have a look at the ROI of the project:
amazing results! No empty boxes ever shipped out of the factory after
the scales were put in place. Very few customer complaints, and they were
gaining market share. "That's some money well spent!" - he says, before
looking closely at the other statistics in the report.

It turns out, the number of defects picked up by the scales was 0 after
three weeks of production use. It should've been picking up at least a
dozen a day, so maybe there was something wrong with the report. He
filed a bug against it, and after some investigation, the engineers come back
saying the report was actually correct. The scales really weren't picking up
any defects, because all boxes that got to that point in the conveyor belt
were good.

Puzzled, the CEO travels down to the factory, and walks up to the part of
the line where the precision scales were installed.

A few feet before the scale, there was a $20 desk fan, blowing the empty
boxes out of the belt and into a bin.

"Oh, that," says one of the workers - "one of the guys put it there 'cause
he was tired of walking over... "every time the bell rang".

____________________________________________________________
53 Year Old Mom Looks 33
The Stunning Results of Her Wrinkle Trick Has Botox Doctors Worried
http://thirdpartyoffers.juno.com/TGL3131/4f1c8c506c31d294e9cst05vuc
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Re: chain steering

Giles Puckett — 2012-01-23T10:53:49

A program to help cut out elliptical sprockets is at 
http://www.aloftyideal.com/ - scroll down to "Spacely Sprockets"

G.

On 21/01/2012 8:35 AM, Bob Stuart wrote:

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Ride Ataxia

David Jr. — 2012-01-21T21:12:35

Hello ,

Can you add this upcoming charity ride to your event calendar?
Detailed information about the event is posted below and our logo
graphic is attached..

Event: Ride Ataxia
Date: March 24, 2012
Location: Denton, TX. UNT Apogee Stadium
Website: http://rideataxia.org/dallas
Brief description: 6, 25, and 50 mile route options. Full SAG support
with post ride food provided by Outback Steakhouse. Fundraising
benefits the Friedreich's Ataxia Research Alliance (FARA). Fundraising
not required but strongly encouraged.

Details:
Come ride with Outback Steakhouse and FARA- enjoy the grounds of UNT
Apogee Stadium, amazing North Texas views of Ray Roberts Lake, plus
delicious food. Appealing to all levels of cycling abilities, Ride
Ataxia will include 6, 25 and 50 mile route options with a meal
provided by Outback Steakhouse after the ride. Founded by Kyle Bryant,
a young man with Friedreich’s ataxia (FA), the Ride Ataxia event has
funded over $1 million is FA research. Ride Ataxia is a fundraising
program of FARA with ride locations in Dallas, Northern California,
Philadelphia and Orlando. FARA is a nonprofit organization dedicated
to research and a cure for FA- a debilitating, life-shortening,
degenerative neuro-muscular disorder. For more information or to
register, visit: www.rideataxia.org/dallas or email info< at >curefa.org.Thank you,   David/Spinner 
 Follow This Link to visit my personal web page and help me in my efforts to support Friedreich's Ataxia Research Alliance (FARA)
 "God's primary goal for us in this life is not our personal happiness, but our likeness to His Son!" (Tom P.)"God is most glorified in us when we are most satisfied in Him"
(John Piper)
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Re: list activity

Philip Donahue — 2012-01-20T23:43:01

I've learned moderation and restraint the hard way. I use Arkel RT40's mid-ship on my Gold Rush while pulling a BOB trailer, and on my Trice Explorer, I use Arkel GT-54's and a Burley Nomad trailer. Either way, I try to keep gear down to a combined weight of about 20-25 kilos.  Probably doesn't matter - I'm only good for 30-40 miles per day, unless it's all down hill.

On Jan 20, 2012, at 5:11 PM, John Turvey wrote:

 unds) .

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Re: chain steering

Bob Stuart — 2012-01-20T22:35:43

What program would you recommend for that?  Have you done it?  I've  
been wanting to do a design like that for decades.

Bob Stuart

On 20-Jan-12, at 4:32 PM, Michael Ross wrote:


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Re: chain steering

Michael Ross — 2012-01-20T22:32:08

These days of CAD and CNC, you can easily design your own sprockets and get
them laser cut.

On Fri, Jan 20, 2012 at 5:17 PM, Bob Stuart <bobstuart< at >sasktel.net> wrote:

Re: chain steering

Bob Stuart — 2012-01-20T22:17:37

Hi Barry, I misspelled L' Obeissante, and my reference book does not  
seem to have made it to the 'net yet.  Aircraft steering yokes are  
often chain-drive to improve on cable drives, which are sloppier and  
weaker.  Care must be taken to synchronize the chordal speed  
variations by using identical sprockets and an even number of chain  
links for a smooth action with minimal slop on reversing.  For non- 
linear action such as ackerman variations, a tensioner may be  
needed.  There are lots of examples of non-circular gears, and some  
of those can be adapted for chains.

Bob Stuart
Sent from The Country Formerly Known as Nice.

On 20-Jan-12, at 3:45 PM, Barry wrote:


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Re: list activity

John Turvey — 2012-01-20T22:11:41

Do not use both - last year I went cycle camping in Holland on my 
Ti-Rush - I had experimented before I first used my Ti-Rush for camping 
and had found it worked best with my Ortlieb front roller panniers on 
the 'mid-ship' rack and the rest of luggage in my trailer - the problem 
is that this meant the trailer was only half full - now I seem to be 
able to fill all available luggage space up, so as the trip went on (I 
was away for five weeks) the amount of luggage grew - this was not much 
of a problem in Holland (it is quite flat) but when I got home the road 
out of the ferry terminal in North Shields (near Newcastle upon Tyne in 
NE England) is a gentle up-hill but with all my luggage it was really 
difficult - I weighed my luggage when I got home and it was just under 
40 kilos (about 85 pounds) .

Mind, some of the Dutch cyclists I met while I was camping were 
carrying MUCH more than I was.

John Turvey

On Friday, Jan 20, 2012, at 18:32 Europe/London, Philip Donahue wrote:


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Re: list activity

Philip Donahue — 2012-01-20T18:32:31

Use both.  Now what?

On Jan 20, 2012, at 1:21 PM, SerxnerLa< at >aol.com wrote:


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list activity

2012-01-20T18:21:37

I'm just glad to see it again!  We could talk about trailers vs  panniers 
for another round of comments!!!
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Re: Steering

Bob Stuart — 2012-01-20T01:33:06

The world's first mechanical road vehicle, Le Oblissante, had to  
operate on roads that were laid out for horse carts with their  
extreme steering angles.  With hard tires and a dismal power to  
weight ratio, this required very accurate geometry, which was  
provided by the use of irregular chainwheels.

I hope that this list will get lively again.  I thought everyone had  
moved to Facebonk, where never is heard an off-topic word, and the  
eyes are all mired all day.

Bob Stuart
Sent from The Country Formerly Known as Nice.

On 19-Jan-12, at 7:16 PM, Giles Puckett wrote:


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Re: brake fluid

Giles Puckett — 2012-01-20T01:16:06

Aaakk! No! Not the A-word...

G.

On 20/01/2012 11:01 AM, Ed Meinel wrote:

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Re: brake fluid

Ed Meinel — 2012-01-20T01:01:47





The list was quiet for the longest time until someone asked an innocent question about disc brakes, then it lit up like a Christmas tree!

It's a good thing no one said anything about Ackermann steering...

Ed Meinel
Yellow Dragonflyer

       
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Re: Mechanical disks

Colin Bryant — 2012-01-18T23:41:04

I have little fear of cable or hose failure, but I have had the nasty experience of finding cables frozen and running off the road to avoid an accident, in colder weather.

Re: Hope disc brakes on GTE

John Turvey — 2012-01-18T21:05:29

On Tuesday, Jan 17, 2012, at 18:38 Europe/London, Zach Kaplan wrote (IN 
PART):


Well. not sure if I should say this, but that has not been my 
experience - my first recumbent (in 1995) was a Peer Gynt which has 
Magura hydraulic rim brakes.

This is a long wheel base under-seat steering (2 wheel) recumbent - 
when you fall on it (as I did a few times, mainly after I put on SPD 
pedals) the first bit you land on is the nut which holds the hydraulic 
hose in the brake lever on the handlebar on the side you fall on - this 
does not appear to do anything, but the next time the brakes is 
applied, the fluid squirts out -  so I had to top up the fluid - as far 
as I can remember, once for the front brake and  3 times for the back 
brake - and I used 'DOT 4" fluid (I still have the bottle - which says 
'fluid will damage paint work") as the first time it happened I was 
with my brother who trained as a car mechanic so he went to the nearest 
garage and bought the bottle of fluid (neither of us knew that mineral 
oil is what is supposed to be used in Magura hydraulics).

The brakes must have done at least  14,000 miles after the various 
refillings over 7 years or so and continued to work - now the front 
brake is probably mainly filled with the original mineral oil, but the 
back brake lost quite a lot of fluid each time I fell, so must be 
almost all DOT 4 fluid.

Maybe I have just been lucky - I still have the Peer Gynt but have not 
ridden it since 2003 as I now mainly ride trikes, but if I ever use it 
again I will have doubts about the brakes.

John Turvey

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Re: Mechanical disks

Michael Ross — 2012-01-18T21:00:58

Keith,

Over the years I have had numerous problems with brake and gear cables
fraying and then failing, but no trouble at all with hydraulics.
I think your concern of nicking the cables is unfounded - they are very
robust.
I gather some are tired of my making comparisons to automobiles, but cables
get some application as the very intermittent use in emergency brake
actuation, but all others use hydraulic brakes.  Properly designed
hydraulic brakes are neither finicky nor unreliable. They are also more
powerful in case one is into loaded touring.

Mike


On Wed, Jan 18, 2012 at 1:00 PM, <SerxnerLa< at >aol.com> wrotei:

Re: Mechanical disks

2012-01-18T18:00:53

This ongoing exchange highlights some reasons for switching to cable  
actuated disks.  My old GTO does just fine with it's drum brakes,so that's  not 
an issue for me, and we have toured on our GTT fully loaded in the  Sierras 
(lots of long downhills) with the Avids.  Also, we have toured with  friends, 
in very hilly areas, who have the Avids on their ICE tandem.
    I may be proven wrong in the long run, but right now, I  lean in favor 
of cable actuated disks, at least for our tandem.
Keith
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Re: Hope disc brakes on GTE

Zach Kaplan — 2012-01-18T17:11:20


Also Magura was using mineral oil in their rim brakes dating back to  
the 1980's so they already had experience with seals for it before  
they started making disc brakes in the 1990's. Someone told me Magura  
and Shimano use mineral oil due to strict laws about toxics in  
consumer products in Germany and Japan but I don't have any  
verification of that.

-------------------------------------------------------------
Zach Kaplan Cycles
510-522-BENT (2368)
zach< at >zachkaplancycles.com
http://www.zachkaplancycles.com




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Re: Hope disc brakes on GTE

Rob Hague — 2012-01-18T16:51:39

Sorry, that was badly written - must remember not to post before having first morning coffee....
Rob


On 18 Jan 2012, at 06:44, Rob Hague wrote:


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Re: Hope disc brakes on GTE

Rob Hague — 2012-01-18T06:44:30

Perhaps because Sachs and Magura were the orginators of hydraulic systems on pedal cycles. The original Sachs parts I owned in the late 90s (and which were established products at the time) looked more motorcycle than pedal cycle at the time. Service advice at the time was to treat them as per Citroen brake systems - also mineral oil as mentioned by Mr Larrington.

Systems using DOT products didn't appear here until much later, initially at US imports and treated with mistrust due to use of aggressive chemicals - Hayes was the first I encountered - and they came with warnings of skin & paintwork damage where as the incumbent parts did not.

Rob 


On 17 Jan 2012, at 22:44, Michael Ross wrote:


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