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Old 01-03-2010, 02:39 PM   #9811
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Default Gearing, Roll out and Speed Calculator

Hello all.

I've made a small calculator in MS Excel that might be useful for choosing the right gearing and in addition the timing-thresholds for the ESC.
Below is a screen shot of the Excel spreadsheet and the file it self packed as a zip file.

Based on the input it will give you: FDR, Roll out, motor RPM (based on pack voltage and motor KV and + "stand alone" calculator) and speed (same as for RPM). All input are metric, but feel free to modify it for imperial values.

I know that there are similar on-line calculators, but this one is small and easy to use (at least I feel it is). It should be possible to load it on Smart phones and PDA's for field use in addition to PC's.

To make full use of these data an eLogger like the one from EagleTree would be really helpful for picking the RPM thresholds. http://www.eagletreesystems.com/MicroPower/micro.htm

The calculator can of course be used for all kind of RC cars (1/18 to 1/8 buggy's and larger).

Regard Ronny
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Old 01-03-2010, 02:43 PM   #9812
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Got to try the software yesterday and what a difference from version 200. Great rip out of the corners and wonderful top end. Alot of the people there pratacing usaully run LRP's and were coming up and saying they are planning on picking up a RS, becuase the new software is so fast. Great Job Tekin!
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Old 01-03-2010, 02:48 PM   #9813
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Originally Posted by slotracer577 View Post
Saw some booster issues last night on the oval with V203, one with the novak smart boost, kept shutting off every few laps. Was probably hitting the LV cutoff.
I lost a Dimension engineering LVboost, just went up in smoke. So far out of 3 DE boosters and two TQ boosters, I have lost one of each. Might be enough to go back to a RX pack.
John, no issue with using a receiver pack on Friday night. I'll probably pull the booster out of my wgt car. Not sure what to do for the 1/12 scale on road car.
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Old 01-03-2010, 03:31 PM   #9814
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I found the first meters a bit slow but after that it started accelerating and it became a rocket.
But I will play what whit the setups.

I'm looking for a good setup for a Speedpassion V3 13,5T.
On a small indoor track.
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Old 01-03-2010, 03:47 PM   #9815
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Originally Posted by mikky32 View Post
I found the first meters a bit slow but after that it started accelerating and it became a rocket.
But I will play what whit the setups.

I'm looking for a good setup for a Speedpassion V3 13,5T.
On a small indoor track.
How small is small?
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Old 01-03-2010, 03:50 PM   #9816
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Quote:
Originally Posted by mikky32 View Post
I found the first meters a bit slow but after that it started accelerating and it became a rocket.
But I will play what whit the setups.

I'm looking for a good setup for a Speedpassion V3 13,5T.
On a small indoor track.
every setup is going to be close except the fdr,turn off turbo i have found around 8-12 end bell fells good for my style and start with 40-45 timing boost,if you really think about when turbo was introduced on trying to find a gearing we are doing the same now but everything comes on allot faster.
i would start with a 3500 and end with about 8500 try 2.0 ramp and then 3 with the same rpm rang to see what happens then bring about 5 turbo after a few test runs
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Old 01-03-2010, 03:59 PM   #9817
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Quote:
Originally Posted by ronsand View Post
Hello all.

I've made a small calculator in MS Excel that might be useful for choosing the right gearing and in addition the timing-thresholds for the ESC.
Below is a screen shot of the Excel spreadsheet and the file it self packed as a zip file.

Based on the input it will give you: FDR, Roll out, motor RPM (based on pack voltage and motor KV and + "stand alone" calculator) and speed (same as for RPM). All input are metric, but feel free to modify it for imperial values.

I know that there are similar on-line calculators, but this one is small and easy to use (at least I feel it is). It should be possible to load it on Smart phones and PDA's for field use in addition to PC's.

To make full use of these data an eLogger like the one from EagleTree would be really helpful for picking the RPM thresholds. http://www.eagletreesystems.com/MicroPower/micro.htm

The calculator can of course be used for all kind of RC cars (1/18 to 1/8 buggy's and larger).

Regard Ronny
When entering the pack voltage; should we enter the voltage the pack charges to or the rated voltage of the pack?
Thanks,

Danny
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Old 01-03-2010, 04:02 PM   #9818
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Well, today i make a test of the new software in a new home track, with a new car, yes, a lot "new"...
I run in mod, and testing with Nosram Pure 4.0 (same LRP X12), i dont know if the new software modified the form of work in Dual mode, or is only for sensored mode, i tested both, but more in Dual, but i need more time, because my car is new, and need time for it, too.

The car are, silly fast, more than a Nitro car, in medium-large fast track, straight about 50m, 15.3-15.5s my times for lap, 15.5-15.8 1/10 nitro car.
Very smooth and more control in curves, the car is a Shumacher Mi4LP.

In Dual mode, i use: Motor 4.0T -5 FDR: 8.4, DB:7-BS:80-NW:8-TP:3-TM:75-CLff (in morning 75 when the grip go up, go to 85 and finally off) - RPM: 15K - 5K - Ramp:2 (Not sure if this affect the response in this mode).
The motor are 65C in 5 min, and 5-6 leds in ESC, 19C air temp.

A litle test in Sensored mode (2 batts): Same motor, same timming, same FDR, all settings the same, but TM:30 - TMB:10 - T.DLY: 0.7 - RPM:15K-5K - Ramp: 2.
Motor go up to 70C, more power and litle difficult to drive, i think need 1 tooth down in pinion, and go to ramp:1, and wide the rpm window, with this mode i 0.2s fast but less consistent. (i need to adjust a litle the setup of the car).
Large day in track, i feel in general more power but driveable, i use the same setup of v200 software, more speed and less heat in motor.

Greetings, Luis C.
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Old 01-03-2010, 04:08 PM   #9819
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Quote:
Originally Posted by Danny-b23 View Post
How small is small?
25m x 15m
So it's small for a 10,5 lrp X11.

Quote:
Originally Posted by 20 SMOKE View Post
every setup is going to be close except the fdr,turn off turbo i have found around 8-12 end bell fells good for my style and start with 40-45 timing boost,if you really think about when turbo was introduced on trying to find a gearing we are doing the same now but everything comes on allot faster.
i would start with a 3500 and end with about 8500 try 2.0 ramp and then 3 with the same rpm rang to see what happens then bring about 5 turbo after a few test runs
I have a TC on 2 cell lipo.
I used the Turbo but next time I will not use it.
I got a setup from cyanyde. I will try that first with the RPM settings.
30000-7000 rpm settings.
The Turbo kicked in and my car accelerated so fast that I had to use the brakes to go true the corner.

I will try that with a Boost of 40 to start with and a gearing of 7,3FDR.

Thais was my setup today.
Boost 40
Turbo max
Turbo ramping 3
Turbo delay 0,2
RPM 6500 - 4000
Gearing 9,18FDR
It was all to much of every thing.
Turbo was wrong to use.
Gearing to light and RPM to close to each other.
I start next time with a bigger RPM range and a heavier gearing and work than with the Boost.
Than I van always ad a bit Turbo for the last part. I hope that it will go a bit faster than the V200 but not so fast as I did this weekend. The car was out of control and I had to work on my setup of my car.
My photon hold the power very well.

I just field the power of the speedo and forgot that I had a race and only wanted to play with the power.
But play time is over and now I want to go fast but the right way and the way so I can handle the car.
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Old 01-03-2010, 04:09 PM   #9820
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hey
i was testing the new version sw today
nodiced it was a bit slow out the corners.
it was waiting a moment and it went of like a rocket .so a bit delay.
it was in al corners.
after 4 minutes the delay was going bigger til it barely was moving forward.
it was like my batery was dumping.
my motor is a sp 13,5 3.0 tim 5 deg.
7,4 lipo 5000 35c gm
car is a top photon.
timing boost was 50
turbo 10
delay 0.4
ramp 3,0
rpm 8502/5420
fdr was 7.0 to 8,0 tested
nodiced the fading also with the v200 software
but the speed was the same over the run
my wires are 14ga from speedo to motor is that a problem maker?
hope for some tips
help randy
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Old 01-03-2010, 04:26 PM   #9821
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what does the lower rpm number do where its start rpm in the advance
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Old 01-03-2010, 04:30 PM   #9822
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Quote:
Originally Posted by marcel p View Post
hey
i was testing the new version sw today
nodiced it was a bit slow out the corners.
it was waiting a moment and it went of like a rocket .so a bit delay.
it was in al corners.
after 4 minutes the delay was going bigger til it barely was moving forward.
it was like my batery was dumping.
my motor is a sp 13,5 3.0 tim 5 deg.
7,4 lipo 5000 35c gm
car is a top photon.
timing boost was 50
turbo 10
delay 0.4
ramp 3,0
rpm 8502/5420
fdr was 7.0 to 8,0 tested
nodiced the fading also with the v200 software
but the speed was the same over the run
my wires are 14ga from speedo to motor is that a problem maker?
hope for some tips
help randy
I believe your start and end rpm's for boost are off. Lower your start rpm to 3000 and increase your end rpm to at least 10000. This should lower your temps a LOT as well.
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Old 01-03-2010, 04:35 PM   #9823
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Quote:
Originally Posted by mikky32 View Post
25m x 15m
So it's small for a 10,5 lrp X11.



I have a TC on 2 cell lipo.
I used the Turbo but next time I will not use it.
I got a setup from cyanyde. I will try that first with the RPM settings.
30000-7000 rpm settings.
The Turbo kicked in and my car accelerated so fast that I had to use the brakes to go true the corner.

I will try that with a Boost of 40 to start with and a gearing of 7,3FDR.

Thais was my setup today.
Boost 40
Turbo max
Turbo ramping 3
Turbo delay 0,2
RPM 6500 - 4000
Gearing 9,18FDR
It was all to much of every thing.
Turbo was wrong to use.
Gearing to light and RPM to close to each other.
I start next time with a bigger RPM range and a heavier gearing and work than with the Boost.
Than I van always ad a bit Turbo for the last part. I hope that it will go a bit faster than the V200 but not so fast as I did this weekend. The car was out of control and I had to work on my setup of my car.
My photon hold the power very well.

I just field the power of the speedo and forgot that I had a race and only wanted to play with the power.
But play time is over and now I want to go fast but the right way and the way so I can handle the car.
that dosent look bad just lower the turbo and spreed the rpms a little,the max turbo is what through you off,that was alot
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Old 01-03-2010, 04:41 PM   #9824
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Originally Posted by Skiddins View Post
While we're here, how about someone's estimates for a 10.5 setup (Hacker, Tekin and LRP X12 motors) on the following track;

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
OK, so I raced here today (although the layout was a bit faster and flowing) and started with;

X12 10.5 (0deg)
6.9fdr
revs 8000 & 1500(roughly)
timing - 35
Turbo - 10
Ramp 2.0
Delay 0.7

Turbo hardly ever got a chance to come in and when it did down the straight it was so powerfull that It pushed me too wide in the sweeper.

Also tried FDR's of 6.6, 7.6 and 7.25
In the end the best seemed to be 7.25, with 40 timing.

Indoors at that club I usually take around 1700-1800mAh out of my Thunder Power lipo's, this software was taking up to 2200-2300mAh out of them!

No-one could challenge me along the straight but the handling wasn't up to the power available.

More experimentation next week at my outdoor local, provided the weather holds!

Skiddins
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Old 01-03-2010, 04:43 PM   #9825
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