armado de ruedas raras.docx

7/27/2019 armado de ruedas raras.docx

1/8

This pattern reached its peak in popularityduring the 1950's (not that it was that

popular). This pattern has been tried and

tested. A good place to start for someone

new to mixed spoke pattern building.

Maintenance of this wheel is reasonably

straight forward and should not require

any surgery to replace broken spokes.

The pattern illustrated uses 12 Radialspokes and 24 * 3X spokes (2X could have

been used).

View below


2/8

showing both sides of wheel

There are three spokes to each set.

However the crossing spokes cross

the spokes in the next set. Thishappens because I used 3X spokes

here. I could have used 2X which

would have prevented this.

This means that each set has to be

inverted (Inward bound spokes on

one set become outward bound on

the adjacent sets). While the two

crossing spokes leave on the same

side of the hub the radial spokeleaves on the other and is interlaced

with the crossing spokes.

The valve is a 7 O'clock. In this

pattern you just need to make sure

the valve is next to a radial spoke.

Make the first spoke you start with a

radial, and place next to the valve

hole.


3/8

This pattern I first saw on

a motor cycle. Sheldon

Brown also notified me of

this pattern. Having 36

spokes all the same length

(3X) it was easy to build,

however all spokes are

laced at some point (some

three times).

Maintenance with such

lacing may require the

removal of other spokes to

replace the broken one.

I think this is the best

looking wheel I have seen,

A 32 spoke version can be built using 2 leading and 2 Trailing spokes (2X

Length).

View below showing both sides of wheel


4/8

If you look at the outside

spokes (At the hub) They are

interlaced with all three spokes

in the opposing set, The

middle spoke is interlaced withtwo spokes, and the inside

spoke is interlaced with only

one.

The outside spoke are mildly

curved as they run from the

hub to the rim in the region of

the interlacing

The valve is at 6 O'clock. As

you can see there are only 3

places the valve can reallygo.

Try to ignore the shadows on

the wall.


5/8

This has been the most

difficult wheel I have

ever built. It took overthree hours to build

and has three different

spoke lengths.

It has 40 spokes with 5

spokes to each set.

8 * Radial, 16 * 3X

and 16 * 4X.

It was a challenge to

build but has remained

remarkably true

throughout it's existence with no trouble. It does seem to be a forgiving

wheel as it has been dropped down a few potholes without any problems.

However spoke replacement will require major surgery.

I know crows don't have 5 toes but my imagination was running thin and

the idea came from the original Crows Foot described earlier.

View below showing both sides of wheel


6/8

This wheel is a double sided

fixed. This simplified the

building as no dishing

requirements were necessary.

Again the outside spokes in the

set cross the outside spokes of

the next set, making it necessary

to invert adjacent sets.

Note the valve placement

at 7 O'clock. This is in

the mid point betweentwo radial spokes. There

appeared to be more

room here than next to a

radial spoke as in the 36

spoke version.


7/8

Take a good look at the week below. All the spokes cross 3 other spokes bwteen

leaving the hub and meeting the rim. But there are no 3X length spokes used at

all.

The leading spokes are 4X and the trailing spkes are 2X.


8/8

I have not built one of these and neither do I intend to do so.It does question the

defintion of spoke length being determined by the number of spokes they cross.

A more accurate definition would be a displacment factor. Consider a radial

spoke. This would have a displacment factor of 0. Now displace the spoke one

hole in the rim in any direction (Ignoring holes for the other side of the wheel).

This spoke would now have a displacement factor of 1 or what is currently

known as 1 Cross. Displace it again and it has a displacment of 2 or 2 Cross. This

definition works for all methods of wheel building and not just regular patterns.

The wheel illustrated would have uneven tension in the spokes. All the trailing

spokes would have greater tension than the leading. If the wheel was built so that

all the trailing spokes had less tension (4X spokes) and all the leading spokes had

more tension (2X spokes). This may be advantageous for rear wheels tocompensate for the affects of acceleration. However I am not an enginneer and

will leave this thought with them.

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