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Old 01-10-2009, 06:28 PM   #646
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Default ackerman arms

so to use the front diff you need to use the other ackerman arms that come with the kit?

how does each ackerman arm affect the steering?
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Old 01-11-2009, 05:18 AM   #647
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Default hope thiz helps

Quote:
Originally Posted by olkleaf View Post
so to use the front diff you need to use the other ackerman arms that come with the kit?

how does each ackerman arm affect the steering?
Ackermann controls the difference in steering arcs between the front
inside and outside wheels. The inside wheel always has a tighter arc in
any corner. The amount of grip provided by the tires, in relation to the
steering arc and speed of the car, create an amount of measurement
called a “slip angle” for each wheel. For some tires you need a greater
difference in slip angles between the inner and outer wheel and for some
you need less.
The size and geometry of the servo saver on XRAY cars forces the inside
wheel to increase its turning angle at a greater rate than the outside
wheel, as the servo turns either way from center. The rate of the increase,
called Ackermann effect, can be changed by the angle of the steering
rods connecting the servo saver to the steering blocks. The straighter the
rods are in relation to each other, the more Ackermann effect will be
applied to the inside wheel.
Slip angles work differently on each wheel when the car is slowing down & pitching forward, than when the throttle is applied & the tires are pulling
the car forward. The goal in tuning Ackermann is to get the car to keep a consistent steering arc after going from off-power to on-power, while not
allowing the front inside wheel to be turned too much and drag through the corners instead of rolling through them. If the car steers well off-power
but pushes on-power, then use more Ackermann effect and decrease your transmitter EPA/dual rate. If the car steers well on-power and pushes
off-power, or if you can hear the front inside wheel chattering at mid-corner, then use less Ackermann effect and increase your transmitter EPA/dual
rate.
ADJUSTING ACKERMANN
The angle of the steering rods (and hence the Ackerman effect) can be adjusted by changing the location of the steering rods inner mounting
positions on the servo saver. This is accomplished by using Ackermann inserts.
• Least Ackermann effect: Servo saver insert with holes furthest FORWARD; steering rods most angled.
• Most Ackermann effect: Servo saver insert with holes furthest REARWARD; steering rods straightest.
We recommend using more Ackermann in low-to-medium grip conditions, and less Ackermann in medium-to-high grip conditions.
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Old 01-11-2009, 09:00 AM   #648
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Quote:
Originally Posted by ccrcraceway View Post
Ackermann controls the difference in steering arcs between the front
inside and outside wheels. The inside wheel always has a tighter arc in
any corner. The amount of grip provided by the tires, in relation to the
steering arc and speed of the car, create an amount of measurement
called a “slip angle” for each wheel. For some tires you need a greater
difference in slip angles between the inner and outer wheel and for some
you need less.
The size and geometry of the servo saver on XRAY cars forces the inside
wheel to increase its turning angle at a greater rate than the outside
wheel, as the servo turns either way from center. The rate of the increase,
called Ackermann effect, can be changed by the angle of the steering
rods connecting the servo saver to the steering blocks. The straighter the
rods are in relation to each other, the more Ackermann effect will be
applied to the inside wheel.
Slip angles work differently on each wheel when the car is slowing down & pitching forward, than when the throttle is applied & the tires are pulling
the car forward. The goal in tuning Ackermann is to get the car to keep a consistent steering arc after going from off-power to on-power, while not
allowing the front inside wheel to be turned too much and drag through the corners instead of rolling through them. If the car steers well off-power
but pushes on-power, then use more Ackermann effect and decrease your transmitter EPA/dual rate. If the car steers well on-power and pushes
off-power, or if you can hear the front inside wheel chattering at mid-corner, then use less Ackermann effect and increase your transmitter EPA/dual
rate.
ADJUSTING ACKERMANN
The angle of the steering rods (and hence the Ackerman effect) can be adjusted by changing the location of the steering rods inner mounting
positions on the servo saver. This is accomplished by using Ackermann inserts.
• Least Ackermann effect: Servo saver insert with holes furthest FORWARD; steering rods most angled.
• Most Ackermann effect: Servo saver insert with holes furthest REARWARD; steering rods straightest.
We recommend using more Ackermann in low-to-medium grip conditions, and less Ackermann in medium-to-high grip conditions.
Great info. good to know.....
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Old 01-11-2009, 03:20 PM   #649
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Old 01-11-2009, 06:05 PM   #650
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Hi,

What would be a good sterring servo arm for the V1?

Thanks
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Old 01-11-2009, 09:32 PM   #651
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Quote:
Originally Posted by Ramiel View Post
Hi,

What would be a good sterring servo arm for the V1?

Thanks
If we are on the same page then 11 Is a good place to start for medium grip track.
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Old 01-12-2009, 03:01 AM   #652
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Quote:
Originally Posted by ccrcraceway View Post
If we are on the same page then 11 Is a good place to start for medium grip track.
Thanks for replying but I'm asking about a servo arm (horn), not the servo saver ackerman.
Thanks
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Old 01-12-2009, 01:20 PM   #653
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Quote:
Originally Posted by Ramiel View Post
Hi,

What would be a good sterring servo arm for the V1?

Thanks
The steering servo arm or horn is determined by the servo type you are using (futaba, ko-propo, high-tech, etc...) and then based on that you can go with either plastic or aluminum. For steering I use aluminum since the steering on the kit has the servo saver and plastic horns can strip. Your LHS should be able to set you up with one.

Regards,
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Old 01-12-2009, 01:44 PM   #654
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Yes that is true What type of servo do you have? then go from there Aluminum or plastic, I myself have aluminum on my steering and plastic on my throttle no particular brand as long as it fits....
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Old 01-12-2009, 02:45 PM   #655
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I'm using a Futaba BLS451 for the steering. Would be better a aluminium servo arm, can someone point me one with the part number if possibible? I usually buy parts in rc mushroom or rc mart.
Thanks
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Old 01-12-2009, 02:53 PM   #656
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Quote:
Originally Posted by Ramiel View Post
I'm using a Futaba BLS451 for the steering. Would be better a aluminium servo arm, can someone point me one with the part number if possibible? I usually buy parts in rc mushroom or rc mart.
Thanks
Dynamite makes an aluminum servo for Futaba. Part number is dyn2530 and A-Main hobbies carries it.

Regards,
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Old 01-12-2009, 05:02 PM   #657
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Quote:
Originally Posted by Ramiel View Post
I'm using a Futaba BLS451 for the steering. Would be better a aluminium servo arm, can someone point me one with the part number if possibible? I usually buy parts in rc mushroom or rc mart.
Thanks
I run the same servo in my EVO2, with a aluminium servo arm (grey looking with "F" on it, can't remember the brand )

You need to make sure you set the servo saver spring alittle looser to protect it from damage if going this way.
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Old 01-12-2009, 06:08 PM   #658
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Quote:
Originally Posted by Speyederjedi View Post
Dynamite makes an aluminum servo for Futaba. Part number is dyn2530 and A-Main hobbies carries it.

Regards,
Speyederjedi
If I'm not mistaken that's the one I have....
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Old 01-12-2009, 06:29 PM   #659
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thanks for the help with the ankerman arms. i guess ill use #10. high grip track semi technical ..

ummm are these the differential joints im suppose to use for the front? DIFFERENTIAL JOINT 19 (RRR) part# vz218?
this is the link can any one confirm?
http://www.shopkyosho.com/product/pa...er=VZ218/410.0
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Old 01-12-2009, 09:34 PM   #660
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are the 3racing shocks really better than the kyosho's, sorry if this has been asked before... just got my kyo and heard it from someone
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