R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 05-06-2009, 02:39 PM   #16171
Tech Champion
 
STLNLST's Avatar
 
Join Date: Sep 2001
Location: Sacramento
Posts: 8,871
Trader Rating: 19 (100%+)
Default

Quote:
Originally Posted by linger View Post
Korey - you really should learn not to agree with STLNLST on anything. It's a slippery slope. It will be a matter of time before you show up to the track in a dress.

Sorry - my fingers aren't calibrated enough to differentiate a progressive spring from a linear one, and I don't know what a progressive spring is supposed to feel like on the track. What matters is if the spring works - then it really doesn't matter if it's progressive or linear - unless you are an engineer and you need to know why.

I do know that if you hand a Hara spring over to any engineer - they willl tell you that it's linear. And I bet that if I ever get a change to measure it - they will measure linear.

See.....this type of info will only help you in the rcgt class. No wonder you're not going to win this year You call it failure........I say it's a life experience.
STLNLST is offline   Reply With Quote
Old 05-06-2009, 02:39 PM   #16172
Tech Adept
 
EJ20's Avatar
 
Join Date: Jun 2008
Posts: 232
Default

Quote:
Originally Posted by bigz View Post
hi, anyone familiar with hara springs ver 1. can't figure out which is the equivalent of the hpi blue and pink springs.

hara springs are in kg while hpi are in lbs.

thanks.
I'cant tell you what exactly LBS. right now since I don't have the chart on hand but I can tell you the HPI Pink is about 18 LBS. and the HPI Blue is about 16 LBS. If you asking about the Hara's, they are totally different things. They start at about 17 LBS down to 13 LBS, but when you try to compress it by your fingers (someone said not suppose to) you will notice it start soft at the beginning and getting stiffer. Compare to HPI's, you could fully compress the Springs all the way. So, you need to try it and see which one is good for.
EJ20 is offline   Reply With Quote
Old 05-06-2009, 02:44 PM   #16173
Tech Champion
 
STLNLST's Avatar
 
Join Date: Sep 2001
Location: Sacramento
Posts: 8,871
Trader Rating: 19 (100%+)
Default

Quote:
Originally Posted by Korey Harbke View Post
Not trying to step on your toes Ling, but I will agree that the construction of the spring itself is "linear"... The springs still feel as if they are "progressive" on the track. Even Hara himself says that. They are similar to the Xray springs which are just rated with a spring constant rather than a spring rate.

-Korey
You just earned yourself a soda when you get down here. Thanks for having my back against the norcal FAILURE!!!!!
STLNLST is offline   Reply With Quote
Old 05-06-2009, 02:54 PM   #16174
Tech Master
 
Join Date: Aug 2002
Location: Nor-Cal
Posts: 1,832
Trader Rating: 17 (100%+)
Default

Quote:
Originally Posted by STLNLST View Post
You just earned yourself a soda when you get down here. Thanks for having my back against the norcal FAILURE!!!!!
I believe he still has more wins than you...heck, Kathy has more wins than you. In fact, she has more wins in the last 3 races than you have in your sedan career! FAILURE!
__________________
Team Powers, SMC ( www.smc-racing.com the only place to order your batteries online.), Awesomatix, Gonzo Paints, BN Racing
www.TeamPowersUSA.com

"Imitation is the sincerest form of flattery."
Advil is offline   Reply With Quote
Old 05-06-2009, 03:07 PM   #16175
Tech Master
 
linger's Avatar
 
Join Date: Aug 2001
Location: Retired
Posts: 1,132
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by KDR View Post
Bigz,
Not sure if this helps you or not, in any event it is a great item to keep in your pit box. See attached.

-Steve
don't you wonder where all those measured spring values came from?

Quote:
Originally Posted by EJ20 View Post
I'cant tell you what exactly LBS. right now since I don't have the chart on hand but I can tell you the HPI Pink is about 18 LBS. and the HPI Blue is about 16 LBS. If you asking about the Hara's, they are totally different things. They start at about 17 LBS down to 13 LBS, but when you try to compress it by your fingers (someone said not suppose to) you will notice it start soft at the beginning and getting stiffer. Compare to HPI's, you could fully compress the Springs all the way. So, you need to try it and see which one is good for.
6542 Blue: 273 g/mm, 15.29 lb/in
Measured 14.29, 14.27 - average of 14.28

6543 Silver 302 g/mm, 16.91 lb/in
Measured 16.34, 16.07, average of 16.21

6544 Gold 340 g/mm, 19.04 lb/in
Measured 17.38, 17.60 - average of 17.49

6545 White 363 g/mm, 20.33 lb/in
Measured 20.35, 19.33 - average of 19.84

6546 Yellow 388 g/mm, 21.73 lb/in
Measured 20.27, 20.77 -average of 20.52

6547 Red 400 g/mm, 22.40 lb/in
Measured 20.61, 20.60 - avearge of 20.61

6548 Pink 320 g/mm, 17.92 lb/in
Measured 16.60, 16.88 - average of 16.74

to get from g/mm to lb/in - just multiply by 0.056

Thanks to James Arluck for donating his new HPI spring set to get measured. The measured values do differ from the published values - which is absolutley normal. Also interesting to note that the HPI Yellow and Red practically overlap in values.
The HPI springs are indeed linear. I have the entire force/displacement curves to prove it.

Quote:
Originally Posted by STLNLST View Post
You just earned yourself a soda when you get down here. Thanks for having my back against the norcal FAILURE!!!!!
Are you going to borrow money from Tina to buy Korey a soda?
__________________
I used to be a spitter, now I'm a swallower. I graduated.

Last edited by linger; 05-06-2009 at 03:14 PM. Reason: legibility
linger is offline   Reply With Quote
Old 05-06-2009, 03:23 PM   #16176
Tech Adept
 
EJ20's Avatar
 
Join Date: Jun 2008
Posts: 232
Default

Thanks Ling for your Info.
EJ20 is offline   Reply With Quote
Old 05-06-2009, 04:56 PM   #16177
Tech Champion
 
STLNLST's Avatar
 
Join Date: Sep 2001
Location: Sacramento
Posts: 8,871
Trader Rating: 19 (100%+)
Default

Quote:
Originally Posted by Advil View Post
I believe he still has more wins than you...heck, Kathy has more wins than you. In fact, she has more wins in the last 3 races than you have in your sedan career! FAILURE!
That's not true. I have a good handful of wins over the years. You were at a couple of them too She is the fastest Davenport in your household though
STLNLST is offline   Reply With Quote
Old 05-06-2009, 04:57 PM   #16178
Tech Champion
 
STLNLST's Avatar
 
Join Date: Sep 2001
Location: Sacramento
Posts: 8,871
Trader Rating: 19 (100%+)
Default

Quote:
Originally Posted by linger View Post
don't you wonder where all those measured spring values came from?



6542 Blue: 273 g/mm, 15.29 lb/in
Measured 14.29, 14.27 - average of 14.28

6543 Silver 302 g/mm, 16.91 lb/in
Measured 16.34, 16.07, average of 16.21

6544 Gold 340 g/mm, 19.04 lb/in
Measured 17.38, 17.60 - average of 17.49

6545 White 363 g/mm, 20.33 lb/in
Measured 20.35, 19.33 - average of 19.84

6546 Yellow 388 g/mm, 21.73 lb/in
Measured 20.27, 20.77 -average of 20.52

6547 Red 400 g/mm, 22.40 lb/in
Measured 20.61, 20.60 - avearge of 20.61

6548 Pink 320 g/mm, 17.92 lb/in
Measured 16.60, 16.88 - average of 16.74

to get from g/mm to lb/in - just multiply by 0.056

Thanks to James Arluck for donating his new HPI spring set to get measured. The measured values do differ from the published values - which is absolutley normal. Also interesting to note that the HPI Yellow and Red practically overlap in values.
The HPI springs are indeed linear. I have the entire force/displacement curves to prove it.



Are you going to borrow money from Tina to buy Korey a soda?
I'm going to use the money I saved by switching to Geico
STLNLST is offline   Reply With Quote
Old 05-06-2009, 05:02 PM   #16179
Tech Regular
 
Team STPN's Avatar
 
Join Date: Mar 2008
Location: Roseville, Cal
Posts: 319
Default

Quote:
Originally Posted by Advil View Post
I believe he still has more wins than you...heck, Kathy has more wins than you. In fact, she has more wins in the last 3 races than you have in your sedan career! FAILURE!
toasty......
As Dr Phil would say...How does that make you feel?/

Sometimes the truth hurts.....
Team STPN is offline   Reply With Quote
Old 05-06-2009, 05:02 PM   #16180
Tech Master
 
Join Date: Aug 2002
Location: Nor-Cal
Posts: 1,832
Trader Rating: 17 (100%+)
Default

Quote:
Originally Posted by STLNLST View Post
That's not true. I have a good handful of wins over the years. You were at a couple of them too She is the fastest Davenport in your household though
HA! She has gone 3 for 3 in the last 3 weeks. How about you for....let's just say the last 3 years? LOL

She has the most wins, our son has the fastest lap. I'm just old, fat and slow, and I can still beat YOU!

P.S. Don't blame me....blame the HB car we have her driving. She was never this successful with all of the other cars.....
__________________
Team Powers, SMC ( www.smc-racing.com the only place to order your batteries online.), Awesomatix, Gonzo Paints, BN Racing
www.TeamPowersUSA.com

"Imitation is the sincerest form of flattery."
Advil is offline   Reply With Quote
Old 05-06-2009, 05:06 PM   #16181
Tech Regular
 
Team STPN's Avatar
 
Join Date: Mar 2008
Location: Roseville, Cal
Posts: 319
Default

Quote:
Originally Posted by STLNLST View Post
I'm going to use the money I saved by switching to Geico
Don't you mean how much the Ol lady saved by by switching to Geico
Team STPN is offline   Reply With Quote
Old 05-06-2009, 08:58 PM   #16182
Tech Addict
 
bigz's Avatar
 
Join Date: Apr 2007
Location: QC/Las Pinas
Posts: 502
Default

Quote:
Originally Posted by KDR View Post
Bigz,
Not sure if this helps you or not, in any event it is a great item to keep in your pit box. See attached.

-Steve
Hi Steve,

i can't open the file.
__________________
Hot Bodies - Nosram - Tekin - Speed Passion - Futaba - Sorex - RIDE
bigz is offline   Reply With Quote
Old 05-06-2009, 09:05 PM   #16183
Tech Addict
 
bigz's Avatar
 
Join Date: Apr 2007
Location: QC/Las Pinas
Posts: 502
Default

Quote:
Originally Posted by EJ20 View Post
I'cant tell you what exactly LBS. right now since I don't have the chart on hand but I can tell you the HPI Pink is about 18 LBS. and the HPI Blue is about 16 LBS. If you asking about the Hara's, they are totally different things. They start at about 17 LBS down to 13 LBS, but when you try to compress it by your fingers (someone said not suppose to) you will notice it start soft at the beginning and getting stiffer. Compare to HPI's, you could fully compress the Springs all the way. So, you need to try it and see which one is good for.
that's what i've heard also. so if im using HPI Pink and Blue i can't find a match with the Hara springs since their softer...... have to try each at the track.
__________________
Hot Bodies - Nosram - Tekin - Speed Passion - Futaba - Sorex - RIDE
bigz is offline   Reply With Quote
Old 05-07-2009, 03:55 AM   #16184
Tech Champion
 
k_bojar's Avatar
 
Join Date: Oct 2001
Location: Philadelphia, PA
Posts: 6,963
Trader Rating: 30 (100%+)
Send a message via ICQ to k_bojar Send a message via AIM to k_bojar
Default

Quote:
Originally Posted by bigz View Post
Hi Steve,

i can't open the file.
you need acrobat reader to view the file

sometimes you might need to save the file to your PC, then try opening it
__________________
Bodies By Bean | Team Belly
k_bojar is offline   Reply With Quote
Old 05-07-2009, 06:31 AM   #16185
Tech Regular
 
Join Date: Aug 2005
Posts: 308
Trader Rating: 1 (100%+)
Default

Progressive or linear discussions asside, when do you use HPI or Hara springs?

Personally im starting to like the hara springs for long, flowing tracks. I feel it makes the car feel more predictable and smoothes the steering. For twisty tracks i like the HPI springs as it feels more sharp turning in.

What are you thoughts?
Itchy is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hot Bodies Cyclone S wardyl Electric On-Road 4 10-01-2008 07:01 AM
Hot bodies Cyclone 12 k7king R/C Items: For Sale/Trade 1 09-04-2008 07:09 AM
WTB Hot Bodies Cyclone/ cyclone Parts tenpins77 R/C Items: Wanted to Buy 0 07-29-2008 07:48 AM
Hot Bodies Cyclone sdt1 Australia For Sale/Trade 6 07-13-2008 02:05 AM
WTB: Cyclone S/Cyclone Painted bodies vazzo Australia Wanted to Buy 0 02-05-2008 05:15 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 05:41 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net