1933 Chevrolet Pick Up / Hot Rod / Rat Rod
* Hot Rods * Rat Rods * Kustoms * USA Classic Cars * SINCE 2006 *
Skippic Saturday
Believe it or not but I've owned this beauty for seven years and took well care of her. It's about 15 years ago but still love the lines of it. This car has recently been body off and has a given a full restauration by his owner Marco. I will post some pics of that in the future... as soon as it's finished.
Ackermann Steering Principle
What does Ackerman Steering mean?
The Ackermann steering geometry principle is a geometric arrangement of linkages in the steering of a car or other vehicle designed to solve the problem of wheels on the inside and outside of a turn needing to trace out circles of different radius.
The Ackermann steering geometry principle is a geometric arrangement of linkages in the steering of a car or other vehicle designed to solve the problem of wheels on the inside and outside of a turn needing to trace out circles of different radius.
It was
invented by the German carriage builder Georg Lankensperger in 1817, then
patented by Rudolph Ackermann, in the UK
The
intention of Ackermann geometry is to avoid slipping tyres when cornering.
The
geometrical solution to this is for all wheels to have their axles arranged as
radii of a circle with a common centre point.
As the rear
wheels are fixed, this centre point must be on a line extended from the rear
axle. Intersecting the axes of the front wheels on this line as well requires
that the inside front wheel is turned, when steering, through a greater angle
than the outside wheel.
Rather than
the preceding "turntable" steering, where both front wheels turned
around a common pivot, each wheel gained its own pivot, close to its own hub.
While more
complex, this arrangement enhances controllability by avoiding large inputs
from road surface variations being applied to the end of a long lever arm, as
well as greatly reducing the fore-and-aft travel of the steered wheels.
A linkage
between these hubs pivots the two wheels together, and by careful arrangement
of the linkage dimensions the Ackermann geometry could be approximated.
This was
achieved by making the linkage not a simple parallelogram, but by making the
length of the track rod (the moving link between the hubs) shorter than that of
the axle, so that the steering arms of the hubs appeared to "toe
out".
As the
steering moved, the wheels turned according to Ackermann, with the inner wheel
turning further. If the track rod is placed ahead of the axle, it should instead
be longer in comparison, to preserve this same "toe out".
Simple
approximation to perfect Ackermann steering geometry may be generated by moving
the steering pivot points inward so as to lie on a line drawn between the steering
kingpins and the centre of the rear axle. The steering pivot points are joined
by a rigid bar called the tie rod which can also be part of the steering
mechanism, in the form of a rack and pinion for instance. With perfect
Ackermann, at any angle of steering, the centre point of all of the circles
traced by all wheels will lie at a common point. Note that this may be
difficult to arrange in practice with simple linkages, and designers are
advised to draw or analyze their steering systems over the full range of
steering angles.
Some race
cars use reverse Ackermann geometry to compensate for the large difference in
slip angle between the inner and outer front tyres while cornering at high
speed.
The use of
such geometry helps reduce tyre temperatures during high-speed cornering but
compromises performance in low-speed manoeuvres.
Video From the Tube that explains it the easy way...
In Dutch
Het Ackermann-principe houdt in dat de hoek van een voorwiel van een voertuig in een bocht 90 graden staat ten opzichte van een lijn naar een denkbeeldig punt dat in het verlengde van de achteras ligt, om te voorkomen dat de voorwielen in een bocht gaan wringen.
Het Ackermann-principe veroorzaakt een (toenemend) uitspoor
bij het nemen van een bocht.
Het Ackermann-principe is ontdekt door de Duitse
rijtuigbouwer Georg Lankensperger in 1817 en is gepatenteerd in 1818 Rudolph
Ackermann, UK (1764–1834).
Het Ackermann-principe is alleen van toepassing bij een
vooras die voorzien is van fusees, bij een starre vooras zoals bijvoorbeeld een
koets vaak heeft, is dit principe niet van toepassing.
Het Ackermann-principe is een theoretisch principe.
In de praktijk wordt het denkbeeldige punt door
constructeurs vaak niet op de achteras gelegd om betere rijeigenschappen te
krijgen. Naast het camber en de balhoofdhoek (caster) is meer-, minder- of
dicht bij nul Ackermann belangrijk voor de rijeigenschappen van een vervoersmiddel.
Bij een eventuele verlenging of verkorting van het platform zoals bijvoorbeeld
bij een buggy vaak gedaan wordt wordt het fictieve Ackermann punt verlegd.
Hierdoor zullen de rijeigenschappen veranderen.
How To Find Water Leaks in Your vehicle?
Had some water coming in my Chevy causing a wet carpet...
I'd suspected it where the Rear Roll-Up Quarter Window Seals so I'd replaced them.
But... Anyway, where smoke gets out, water can come in...
Searching for: How to Find a Leak in my car. Smoking Out water leaks? Bad door window rubbers / Seals / Sealing? How can find out where my wet carpet comes from.? What Causes a wet Carpet?
Replacing rubber... car seals and check if they're okay? Where is the water in my car coming from?
Check my vid...
I'd suspected it where the Rear Roll-Up Quarter Window Seals so I'd replaced them.
I used a drive in disco smoke machine... borrowed from a friend, to check if there where any more big leaks...
It seems to be much better now. Sadly I didn't film with the bad seals still in it, as it probably would be a better example,But... Anyway, where smoke gets out, water can come in...
Searching for: How to Find a Leak in my car. Smoking Out water leaks? Bad door window rubbers / Seals / Sealing? How can find out where my wet carpet comes from.? What Causes a wet Carpet?
Replacing rubber... car seals and check if they're okay? Where is the water in my car coming from?
Check my vid...
Skippic Saturday
This week... burned some midnight oil, Did some bodywork / welding on the 1970 Impala, It had some serious cancer... Now She's Cured!
Happy New Year!
Go Out with a Bang & Keep coming Back!
Erwin and his Ford Roadster... in Breeze!
Today my Bud Erwin and his Ford Roadster appeared in Breeze...
Bigtwin ( Chopper Kult Pages) Magazine, Issue NR351, December 2015. All Photos and Interview by Sik Bloemsma.
# R.I.P Bob / # JestersCC / # EindhovenRodCity
How to Identify your GM rear end gear ratio?
How can I Identify my GMC or Chevrolet rear end gear ratio?
Well.. this
can be done by the General Motors "Regular Production Option"
codes, also
called... RPO Codes. The codes
are provided by a tag labelled “Service Parts Identification” that's usually located
inside the drivers door panel or glove box.
These
plates contain valuable information about your GM vehicle. Assuming
that the rear end previously has not been swapped or modified, you can use these
plates for accurate identification of
your rear end / differential.
The list
below is a partial list of typical GM RPO Codes, specifically the codes
pertaining to Axle Identification, Differential Type and Gear Ratio.
The prefix
is usually F, G or H when referring to Axle Identification.
Code
|
Ratio Description
|
Ratio
|
FA0
|
Rear Axle
|
5.77:1
|
FA1
|
Rear 2 Speed
|
4.88:1/6.94:1
|
FA2
|
Rear 2 Speed
|
4.88:1/6.94:1
|
G44
|
Rear Axle
|
3.07:1
|
G72
|
Rear Axle
|
2.14:1
|
G75
|
Rear Axle
|
3.70:1
|
G76
|
Rear Axle / Posi / Limited Slip
|
3.36:1
|
G80
|
Rear Axle / Posi / Limited Slip
|
X
|
G81
|
Rear Axle / Posi / Limited Slip
|
X
|
G82
|
Rear Axle
|
4.56:1
|
G84
|
Rear Axle
|
4.10:1
|
G86
|
Rear Axle / Limited Slip
|
X
|
G87
|
Ring Gear
|
8.5"
|
G89
|
Ring Gear,
|
7.5"
|
G90
|
Rear Axle
|
3.15:1
|
G91
|
Rear Axle /
|
3.08:1
|
G92
|
Rear Axle
|
3.08:1
|
G94
|
Rear Axle
|
3.31:1
|
G96
|
Rear Axle
|
3.55:1
|
G97
|
Rear Axle
|
2.37:1
|
GH0
|
Rear Axle
|
3.54:1
|
GH2
|
Rear Axle
|
2.29:1
|
GH3
|
Rear Axle
|
2.77:1
|
GH4
|
Rear Axle
|
2.92:1
|
GH7
|
Rear Axle
|
2.73:1
|
GJ1
|
Rear Axle
|
5.38:1
|
GJ2
|
Rear Axle
|
5.13:1
|
GK7
|
Rear Axle
|
4.78:1
|
GK8
|
Rear Axle
|
4.33:1
|
GK9
|
Rear Axle
|
4.63:1
|
GL0
|
Rear Axle
|
5.13:1
|
GL3
|
Rear Axle
|
6.17:1
|
GM1
|
Rear Axle
|
2.59:1
|
GM2
|
Rear Axle
|
3.44:1
|
GM3
|
Rear Axle
|
3.45:1
|
GM4
|
Rear Axle
|
3.67:1
|
GM5
|
Rear Axle
|
3.89:1
|
GM6
|
Rear Axle
|
4.22:1
|
GM7
|
Rear Axle
|
3.68:1
|
GM8
|
Rear Axle
|
2.56:1
|
GN9
|
Rear Axle
|
4.11:1
|
GS1
|
Rear Axle
|
2.73:1
|
GS3
|
Rear Axle
|
3.73:1
|
GS4
|
Rear Axle
|
3.70:1
|
GS5
|
Rear Axle
|
4.11:1
|
GS6
|
Rear Axle
|
4.56:1
|
GS8
|
Rear Axle
|
3.94:1
|
GT1
|
Rear Axle
|
2.56:1
|
GT2
|
Rear Axle
|
2.29:1
|
GT4
|
Rear Axle (Dup of 5X1)
|
3.73:1
|
GT5
|
Rear Axle (Dup of GT8)
|
4.10:1
|
GT7
|
Rear Axle
|
3.33:1
|
GT8
|
Rear Axle (Dup of GT5)
|
4.10:1
|
GU1
|
Rear Axle
|
2.41:1
|
GU2
|
Rear Axle
|
2.73:1
|
GU3
|
Rear Axle
|
2.93:1
|
GU4
|
Rear Axle
|
3.08:1
|
GU5
|
Rear Axle
|
3.23:1
|
GU6
|
Rear Axle
|
3.42:1
|
GU7
|
Rear Axle
|
2.77:1
|
GU8
|
Rear Axle
|
3.9:1
|
GU9
|
Rear Axle
|
3.91:1
|
GV0
|
Rear Axle
|
3.55:1
|
GV1
|
Rear Axle
|
2.73:1
|
GV2
|
Rear Axle
|
5.83:1
|
GV3
|
Rear Axle
|
3.08:1
|
GV4
|
Rear Axle
|
3.36:1
|
GV5
|
Rear Axle
|
3.55:1
|
GV7
|
Rear Axle
|
4.11:1
|
GV8
|
Rear Axle
|
2.72:1
|
GV9
|
Rear Axle
|
4.25:1
|
GW2
|
Rear Axle
|
2.56:1
|
GW3
|
Rear Axle
|
2.56:1
|
GW4
|
Rear Axle
|
3.31:1
|
GW5
|
Rear Axle
|
2.73:1
|
GW6
|
Rear Axle
|
3.27:1
|
GW8
|
Rear Axle
|
4.10:1
|
GW9
|
Rear Axle (Dup of GU3)
|
2.93:1
|
GX1
|
Rear Axle
|
3.70:1
|
GX2
|
Rear Axle
|
3.07:1
|
GX4
|
Rear Axle
|
3.75:1
|
GX5
|
Rear Axle
|
4.09:1
|
GX6
|
Rear Axle
|
3.53:1
|
GY2
|
Rear Axle
|
3.31:1
|
GY4
|
Rear Axle
|
4.53:1
|
GY5
|
Front Axle
|
3.65:1
|
GY9
|
Rear Axle
|
4.31:1
|
H01
|
Rear Axle
|
3.07:1
|
H04
|
Rear Axle / Single Speed
|
4.11:1
|
H05
|
Rear Axle
|
3.73:1
|
H12
|
Rear Axle / Single Speed
|
21000 Lbs
|
H42
|
Rear Axle
|
6.17:1
|
H43
|
Rear Axle
|
5.43:1
|
HA3
|
Rear Axle / Single Speed
|
5.29:1
|
HC4
|
Rear Axle
|
4.56:1
|
HC7
|
Rear Axle / Single Speed
|
2.38:1
|
HC8
|
Rear Axle / Single Speed
|
3.21:1
|
HC9
|
Rear Axle
|
5.13:1
|
HE3
|
Rear Axle / Single Speed
|
3.07:1
|
HE4
|
Rear Axle
|
3.40:1
|
HF7
|
Rear Axle / Dana 70 /Single
|
4.56:1
|
HF8
|
Rear Axle
|
4.88:1
|
HJ1
|
Rear Axle
|
4.55:1
|
HJ2
|
Rear Axle
|
5.86:1
|
HJ3
|
Rear Axle
|
4.75:1
|
HJ4
|
Rear Axle
|
6.50:1
|
HJ5
|
Rear Axle
|
5.57:1
|
HJ6
|
Rear Axle
|
4.78:1
|
HJ7
|
Rear Axle
|
4.88:1
|
HK1
|
Rear Axle
|
2.87:1
|
HK3
|
Rear Axle
|
6.14:1
|
HK9
|
Rear Axle / Single Speed
|
5.86:1
|
HO4
|
Rear Axle
|
4.11:1
|
HO6
|
Rear Axle
|
4.63:1
|
247
|
Autoholic
|
VonSkip
|
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