4LikesTamiya TRF417
04-01-2011, 02:35 PM
#1141
Since I like to use the search function, I did find this regarding the Hara springs:
After sitting on my desk for a year - I finally got around to measuring the Hara Springs. I measured two springs and took an average.
I'm impressed - these spring actually measure very close to the rating on the package - that's rare in the RC world.
The graphs show that the springs are completely linear (with best fit R squared value between 0.9988 and 1.0000 for you technical types).
The measurement was done with a Chatillon 10 lb load cell and a test stand with accuracy within .001".
Hara Springs
66961 Yellow
published = 12.88, measured = 12.97
66962 Silver
published = 14.00, measured = 14.37
66963 Black
published = 15.12, measured = 15.44
66964 Purple
published = 16.24, measured = 16.41
66965 Pink
published = 17.36, measured = 17.57
I'm impressed - these spring actually measure very close to the rating on the package - that's rare in the RC world.
The graphs show that the springs are completely linear (with best fit R squared value between 0.9988 and 1.0000 for you technical types).
The measurement was done with a Chatillon 10 lb load cell and a test stand with accuracy within .001".
Hara Springs
66961 Yellow
published = 12.88, measured = 12.97
66962 Silver
published = 14.00, measured = 14.37
66963 Black
published = 15.12, measured = 15.44
66964 Purple
published = 16.24, measured = 16.41
66965 Pink
published = 17.36, measured = 17.57
04-01-2011, 07:50 PM
#1142
Hi,
anybody know part number for HPI blue and silver spring?
Thank you
anybody know part number for HPI blue and silver spring?
Thank you
04-02-2011, 01:49 AM
#1145
I just got some blues in australia where i live and couldnt find silvers but was able to pick up the full set of HPI so i have plenty now 
04-02-2011, 02:23 AM
#1146
Guest
Anyone know where I can find info on converting 64 pitch gearing to 48 pitch? Thanks in advance.
04-02-2011, 08:38 AM
#1148
Guest
04-02-2011, 09:54 AM
#1149
not sure quite how to read it, but i hope it's firstly obvious that to use 48dp spurs, you need to use 48dp pinions...
But as a quick reference, it's pretty easy to convert 64dp to 48dp.
(teeth of 48dp spur / 1.5)*2 = Teeth in 64dp
HiH
Ed
But as a quick reference, it's pretty easy to convert 64dp to 48dp.
(teeth of 48dp spur / 1.5)*2 = Teeth in 64dp
HiH
Ed
Last edited by TryHard; 04-02-2011 at 06:08 PM. Reason: corrected formula!
04-02-2011, 10:34 AM
#1150
Guest
Yes this would help. Just to clarify. Target FDR is 3.3. Gears req in 64p 100spur and 63pinion with a 2.13 I.R. So 100/63*2.13=3.38 in 64pitch So using the formula...I would need a 133spur and 84pinion in 48pitch....correct?
04-02-2011, 11:15 AM
#1151
Tech Addict
(64p teeth / 2)*1.5
Or just:
(64p teeth / 64)*48
04-02-2011, 05:51 PM
#1152
Guest
. Thank you both for your help.
04-02-2011, 08:42 PM
#1154
Tech Regular
iTrader: (23)
I am in the process of trying to decide which TRF car to purchase, a 416x or 417. I come to you with this question. Knowing what you know now, which car would you purchase, a slightly used TRF416x or a new TRF417? I have the opportunity to purchase a TRF416x with a bunch of spare parts for $140 less than a new TRF417 with a few spare parts. I have never raced on-road so I will have a learning curve with both cars. Would you go for the older car at a lesser price or a newer car with the newer technology?
04-03-2011, 01:43 AM
#1155
Hello, just concerning setup between tracks, what are the main changes between going from carpet to asphalt ?
What should be the first thing changed or what does everyone tend to change?
I was looking at some setup sheets and I think that most people tend to run shocks more upright, thinner oil, higher roll centeron the inner pivot. And also the longer links .
Am I right ?
Thanks
What should be the first thing changed or what does everyone tend to change?
I was looking at some setup sheets and I think that most people tend to run shocks more upright, thinner oil, higher roll centeron the inner pivot. And also the longer links .
Am I right ?
Thanks