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Old 12-20-2011, 07:46 PM   #286
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What class are you going to run? I suggest you start with the slowest one they run at your track.
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Old 12-20-2011, 07:53 PM   #287
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Default Engine / Spur / Pinion ..

Hy guys ... We're starting a S120 class here in Brazil, and we're still making tests on our new track in Sao Paulo ...
I've just finished building my card, and I've never raced electrics before (6 years in nitro tough)...
I have a new X11 9.5T LRP, and we are running Turnigy 2S Saddle packs...
So far we're planning on running 9.5 or 7.5 in the races this year .. still testing .. but . since I have this engine laying around, I wanted to give it a try ...
I have a LRP SXX 2 ESC too ...
Wich Spur / Pinion I should start with here ... we have a track with a mixed chart, so I have a looong straight and some slow curves .....
Can anybody help me ;-)???
Thank you
Rodrigo
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Old 01-02-2012, 01:22 AM   #288
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S120 option parts !
Attached Thumbnails
Serpent S120-Link-ser-411269.jpg  
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Old 01-09-2012, 11:11 PM   #289
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What does the numbers/letters mean/stand for for the center shock springs:
7t x4.0 x 1.0mm 5t x 5.6 x 1.0mm etc.?
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Old 01-10-2012, 04:23 AM   #290
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What does the numbers/letters mean/stand for for the center shock springs:
7t x4.0 x 1.0mm 5t x 5.6 x 1.0mm etc.?
Lets just guess:
7 turns in the spring, 4mm apart (7x4=28mm long), wire thickness 1mm
5 turns in the spring, 5.6mm apart (5x5.6=28mm long), wire thickness 1mm
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Old 01-10-2012, 08:48 AM   #291
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Originally Posted by Quante View Post
Lets just guess:
7 turns in the spring, 4mm apart (7x4=28mm long), wire thickness 1mm
5 turns in the spring, 5.6mm apart (5x5.6=28mm long), wire thickness 1mm
OK, how is the spring rate/stiffness determined by the numbers/letters?
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Old 01-10-2012, 11:50 AM   #292
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OK, how is the spring rate/stiffness determined by the numbers/letters?
Well, the more winds, the softer the spring (for the same wire diameter). But to know the lbs there's more to it so if its not given thats gonna be difficult.
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Old 01-10-2012, 01:51 PM   #293
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Originally Posted by Quante View Post
Well, the more winds, the softer the spring (for the same wire diameter). But to know the lbs there's more to it so if its not given thats gonna be difficult.
the spring rate for a coil spring, N winds, D coil diameter, d wire diameter, G shear modulus (12+6 lbs/in^2 for steel in lbs, inch, seconds )
k = (d^4 * G) / (8*N*D^3)

the carat ^ indicate exponents so D^3 is D cubed.
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Old 01-12-2012, 11:33 PM   #294
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Where can I get the 401025 4.5 mm pivot balls? Nobody seems to carry them in the states.
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Old 01-12-2012, 11:40 PM   #295
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I had to go to RC Market. And though they were labelled correctly, the actual balls were slightly taller than the kit parts.
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Old 01-13-2012, 04:40 AM   #296
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Quote:
Originally Posted by RoyU View Post
Where can I get the 401025 4.5 mm pivot balls? Nobody seems to carry them in the states.
That part number was discontinued. It was replaced by 411253 in a pack of 4 to make it more cost effective.

http://www.amainhobbies.com/advanced...411253&x=0&y=0
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Old 01-13-2012, 10:38 AM   #297
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That part number was discontinued. It was replaced by 411253 in a pack of 4 to make it more cost effective.

http://www.amainhobbies.com/advanced...411253&x=0&y=0
Thanks Chicky03
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Old 01-16-2012, 08:06 AM   #298
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Default Tec doubts...

Guys,
Some questions from new user:

What is the stock front spring (18, 22 or 26) ?
What is the stock center spring (10, 12, 14, 16 or 18) ?
What is the stock side spring ?
How I change front ride height ? Changing spacers or changing tire diameter ? The effect would be the same ?
How I change track width ? Different wheels, spacers ???
How I change rear ride height ? Axle insert ??? The right set up, the Pod have to be horizontal ?
What is Pod droop ? It is something like Down travel on the Buggies for example ? How I change Pod droop ?
How many steel balls should be used on the diff ? On the inside holes or on the outside roles ? Any difference in and out ?

Thank you very much for your help.

Cestari
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Old 01-16-2012, 09:28 AM   #299
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Quote:
Originally Posted by Cestaric View Post
Guys,
Some questions from new user:

What is the stock front spring (18, 22 or 26) ?
What is the stock center spring (10, 12, 14, 16 or 18) ?
What is the stock side spring ?
How I change front ride height ? Changing spacers or changing tire diameter ? The effect would be the same ?
How I change track width ? Different wheels, spacers ???
How I change rear ride height ? Axle insert ??? The right set up, the Pod have to be horizontal ?
What is Pod droop ? It is something like Down travel on the Buggies for example ? How I change Pod droop ?
How many steel balls should be used on the diff ? On the inside holes or on the outside roles ? Any difference in and out ?

Thank you very much for your help.

Cestari
1. Stock front spring is 22.
2. Stock center spring is 14.
3. Stock side spring is 5.5.
4.Serpent makes shims to go between the chassis and the front block to change ride height:https://www.ssl-stormerhobbies.com/c...s&pn=SER411033
5.Rear track width is adjusted with spacers, front can be varied with these:https://www.ssl-stormerhobbies.com/c...s&pn=SER411030, or with spacers for fine adjustment.
6.Rear ride height is adjusted with these:https://www.ssl-stormerhobbies.com/c...s&pn=SER411072
7. Pod usually slopes slightly down back to front, but this is an adjustment you can use to change the handling of the car.
8.Pod droop is the amount the rear of the pod is lower than the front when you lift the car off the ground. You adjust it by lengthening or shortening the shock itself. I use the orange .5mm spacers between the bottom spring perch and the ball cup.
9.Use the outside row of holes, they have a longer lever arm and are under less stress. Fill all these holes with balls. I prefer ceramic ones because they last much longer.
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Old 01-16-2012, 03:22 PM   #300
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Thank you Lonny
thank you very much.

A lot of information to be learned.

Gonna make some changes on my car, based on what you explained and check the new feelings of my car.

once again, thank you.

Cestari
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