10-01-2008, 09:49 AM
Join Date: Aug 2001
Spring Ding a Ling
Spring measurements revisited.
I got a hold of the HPI spring set (thanks J Arluck!), and I measured the spring rate. Two springs were measured and the results averaged.
Published 15.29 - measured 14.28
Published 16.91 - measured 16.21
Published 19.04 - measured 17.49
Published 20.33 - measured 19.84
Published 21.73 - measured 20.52
Published 22.40 - measured 20.61
Published 17.92 - measured 16.74
In addition, I measured a new set of Tamiya Springs (milky blue set) and compared them to the old values from many years ago.
Milky Blue White* 17.05
Milky Blue Blue 14.86
Milky Blue Yellow 13.10
Milky Blue Red 11.53
* Tamiya has changed the coil count on their white spring in the Milky Blue set and the spring stiffness has increased significantly. The other springs remain virtually unchanged.
Note, if you view the entire force vs displacement plot, in general, the HPI springs are more linear and the Tamiya springs more progressive. This non-linearatiy happens within the first 0.05" (1mm) of travel and then everything is extremely linear.
I used to be a spitter, now I'm a swallower. I graduated.