R/C Tech Forums

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

Like Tree7Likes
Reply
 
Thread Tools Search this Thread
Old 11-18-2014, 08:18 AM   #766
Tech Regular
 
Join Date: Jun 2005
Posts: 417
Default

Quote:
Originally Posted by emancipation007 View Post
Anybody use this starter box if not which one do you use
http://www.amazon.com/gp/product/B00...=A2HUFQYBB8LM3
Take a peek at the Xceed box - wheel is small enough to provide good contact with the flywheel through the fairly small opening in the chassis plate - used one for two seasons and my only complaint is the friction wheel material is a little soft so it needs replacing periodically.
__________________
Empire Racing - RC Target - Capricorn - K.O. Propo Electronics - VP Racing Fuel
Time for us all to grow up and sign our real names on posts.
Rick Davis is offline   Reply With Quote
Old 11-18-2014, 08:44 AM   #767
Tech Elite
 
dan_vector's Avatar
 
Join Date: Oct 2013
Posts: 3,540
Trader Rating: 25 (100%+)
Default

I too use the Xceed box (I had the mugen purple box previously which was good too). Personally haven't found the wheel overly soft or wear out quickly at all. 2 seasons on mine and on original wheel. Pre-warming your engine goes along way in making the start kinder to the box.
__________________
Serpent Viper 977e EVO2, Serpent 977 EVO2 GP, Serpent Project 4x, Serpent 811T-TE Truggy, Serpent 811e 2.1, Serpent SRX2-MH, Serpent SRX-2 RM, Serpent SRX-4, Serpent F110-SF2, Serpent F180, Serpent 748 Natrix WC, Serpent Cobra GT 3.0, Serpent SRX8, Serpent S811 2.2, Baja 5B Flux, Atomic AMZ 1/27th, Schumacher GT12 SS.
Sanwa, Ielasi Tuned Novarossi Racing Engines, Tekin, Hobbywing, Muchmore.
dan_vector is offline   Reply With Quote
Old 11-18-2014, 09:53 AM   #768
Tech Elite
 
lil-bump's Avatar
 
Join Date: Aug 2006
Location: The Cold Great Lakes
Posts: 2,927
Trader Rating: 83 (100%+)
Default

Quote:
Originally Posted by Rick Davis View Post
Take a peek at the Xceed box - wheel is small enough to provide good contact with the flywheel through the fairly small opening in the chassis plate - used one for two seasons and my only complaint is the friction wheel material is a little soft so it needs replacing periodically.
+1


Pass you soon...
__________________
Elliott Hart
Serpent America
Desoto Racing Team
Chicky fan club member #9
One Eighth Racers of Toledo
lil-bump is offline   Reply With Quote
Old 12-16-2014, 10:18 PM   #769
Tech Apprentice
 
emancipation007's Avatar
 
Join Date: Jul 2009
Location: Santa Clarita,CA
Posts: 96
Default screw chart

I bought my 977 from absolute hobbies this past week .I recieved it and there was no screw chart in the kit .Usally kits come with screw charts and are used to measure each screw to make sure you are using the right screw .Is this an error on serpent part or is this normal.
__________________
On road and offroad man I love racing
emancipation007 is offline   Reply With Quote
Old 12-16-2014, 11:23 PM   #770
Tech Adept
 
Spillertwo's Avatar
 
Join Date: Jan 2002
Posts: 246
Default

Quote:
Originally Posted by emancipation007 View Post
I bought my 977 from absolute hobbies this past week .I recieved it and there was no screw chart in the kit .Usally kits come with screw charts and are used to measure each screw to make sure you are using the right screw .Is this an error on serpent part or is this normal.
The kit doesn't have a screw chart normally. I just use a measuring tool to make sure i use the right screw
Spillertwo is offline   Reply With Quote
Old 12-17-2014, 01:59 AM   #771
Tech Apprentice
 
emancipation007's Avatar
 
Join Date: Jul 2009
Location: Santa Clarita,CA
Posts: 96
Default

Thanks
__________________
On road and offroad man I love racing
emancipation007 is offline   Reply With Quote
Old 03-04-2015, 10:37 AM   #772
Tech Regular
 
Join Date: Apr 2005
Posts: 252
Default

I just started racing 1/8 scale at the end of last season and was wondering what is the smallest tire size you would go for qualifying? Thanks in advance
quinnfrazier is offline   Reply With Quote
Old 03-04-2015, 11:23 AM   #773
Tech Master
 
Join Date: Apr 2011
Posts: 1,128
Trader Rating: 14 (94%+)
Default

Quote:
Originally Posted by lagcisco View Post
I noticed the manual shows that the steering servo arm should be at a slight angle towards the front of the car, wouldn't this cause steering geometry to unbalanced speed/torque between right and left?

Everything is at 90 degrees except the steering servo arm.. I've seen other cars that had slight angles on the steering servo arms but that angle would match the angle the arm connected to, which on the 977, doesn't seem to be the case. Am I making a big deal out of nothing? just adjust my epas, subtrim and be done with it?
I was just going through this thread and found this. I know it's late response but just wanted to give my thought since I wondered the same.
IMO it's because of the arm hitting the tank if you make the center perpendicular to the chassis. So by making the center face a bit forward, you'd have enough EPA to both directions.
__________________
Capricorn LAB C03, Serpent Project 4X, Airtronics M12, Airtronics Super Vortex
snuvet75 is offline   Reply With Quote
Old 03-05-2015, 01:12 AM   #774
M7H
Tech Elite
 
M7H's Avatar
 
Join Date: Dec 2004
Location: The Netherlands
Posts: 2,193
Default

Quote:
Originally Posted by snuvet75 View Post
I was just going through this thread and found this. I know it's late response but just wanted to give my thought since I wondered the same.
IMO it's because of the arm hitting the tank if you make the center perpendicular to the chassis. So by making the center face a bit forward, you'd have enough EPA to both directions.
Nope.

I will try to explain.
In order to have the same steering characteristics left and right, it is important that in the centre position the servo lever is in a 90 degree angle with the steering linkage.
Just take a look at the car and you will see that this can only be achieved with the servo lever angled forward.
The servo lever travels in a circular movement, and if you just imagine the path the lever travels, you should be able to understand why the lever is under an angle.


Ehh, Dan already explained......

Quote:
Originally Posted by dan_vector View Post
It's more simple than that!! The servo horn is not 90 degrees to the servo but it is 90 degrees to the servo saver arm. It's as designed and as far as I know the same on all similar designs on the market.
__________________
Serpent
M7H is offline   Reply With Quote
Old 03-05-2015, 08:36 AM   #775
Tech Master
 
Join Date: Apr 2011
Posts: 1,128
Trader Rating: 14 (94%+)
Default

Quote:
Originally Posted by M7H View Post
Nope.

I will try to explain.
In order to have the same steering characteristics left and right, it is important that in the centre position the servo lever is in a 90 degree angle with the steering linkage.
Just take a look at the car and you will see that this can only be achieved with the servo lever angled forward.
The servo lever travels in a circular movement, and if you just imagine the path the lever travels, you should be able to understand why the lever is under an angle.


Ehh, Dan already explained......
Yeah you're right. I looked at the car and it makes sense. Thanks.
__________________
Capricorn LAB C03, Serpent Project 4X, Airtronics M12, Airtronics Super Vortex
snuvet75 is offline   Reply With Quote
Old 04-06-2015, 02:30 PM   #776
Tech Rookie
 
Join Date: Apr 2015
Posts: 18
Default

I bought a 977 and I've 2 questions and I hope someone can help me.
1) In the Instruction manual is not written the preload of the Servo saver spring
Instructions manual: step 31/32. Strange that Serpent forgot the specify the spring preload...

2) I downloaded the shock spring chart. Serpent use the LB and not mm as other brand. I always used the mm and know I'm pretty confused.
Do you know the mm of each spring? p.e. Mugen basically have White spring 1.9mm

Thanks in advance for your help
snakess is offline   Reply With Quote
Old 04-06-2015, 06:08 PM   #777
Tech Champion
 
nitrodude's Avatar
 
Join Date: Aug 2002
Location: Oxnard, CA
Posts: 5,792
Trader Rating: 5 (100%+)
Default

Quote:
Originally Posted by snakess View Post
I bought a 977 and I've 2 questions and I hope someone can help me.
1) In the Instruction manual is not written the preload of the Servo saver spring
Instructions manual: step 31/32. Strange that Serpent forgot the specify the spring preload...

2) I downloaded the shock spring chart. Serpent use the LB and not mm as other brand. I always used the mm and know I'm pretty confused.
Do you know the mm of each spring? p.e. Mugen basically have White spring 1.9mm

Thanks in advance for your help
Pre load is driver preference.
Just buy the Serpent springs and you wont have a problem. The size of the wire doesnt matter, just get the springs you need. If you need softer than the kit, get softer and if you need harder get harder.
__________________
Steven Muller
AKA El Pibe RUFAST? HAHA!!!
Ronin Speed Parts
nitrodude is offline   Reply With Quote
Old 04-06-2015, 06:38 PM   #778
avs
Tech Master
 
avs's Avatar
 
Join Date: Jul 2006
Posts: 1,175
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by snakess View Post
I bought a 977 and I've 2 questions and I hope someone can help me.
1) In the Instruction manual is not written the preload of the Servo saver spring
Instructions manual: step 31/32. Strange that Serpent forgot the specify the spring preload...

2) I downloaded the shock spring chart. Serpent use the LB and not mm as other brand. I always used the mm and know I'm pretty confused.
Do you know the mm of each spring? p.e. Mugen basically have White spring 1.9mm

Thanks in advance for your help
the serpent website has a little more info on:
http://www.serpent.com/product/160330/

the lb rating is a stiffness in lbs/inch. this is a more useful specification than just the wire diameter that Mugen provides. (they have more than 1 spring set in 1.9mm thick wire, as more coils reduces the spring rate).

spring rate for a coil spring: http://www.bluecoilspring.com/rate.htm )

K ( lbs/inch) = G*d^4/(8*N*D^3)

where:
G = 12E+6 (modulus of rigidity, 12 million psi for steel)
d is the wire diameter (mugen's 1.9mm or 0.0748")
N is number of coils
D is spring coil diameter (outside diameter of coil minus 1 wire diameter)

for mugen whites, I get about 15.2mm mean diameter, and 4,5 coils for the front, rear. this works out to roughly 56. and 45. lbs/inch.
__________________
Tony Shimko
avs is offline   Reply With Quote
Old 04-07-2015, 05:11 AM   #779
Tech Elite
 
British Menace's Avatar
 
Join Date: Sep 2005
Location: Davenport, IA
Posts: 2,295
Default

+1

You shouldn't really go by coil wire diameter when deciding if one spring is stronger or weaker then another.
Some company's do that as a way of trying to keep you to their brand of springs.
As has been said a Mugan 1.9mm spring could have a totally different spring strength then say Kyosho 1.9mm (Just an example.)

Using lb/inch is a great deal easier and flexible to use although I would still check each spring on a tester if you have access to one.

Regards
BM
__________________
So enjoying building cars I sometimes forget to save some "man-time" to race them!?
British Menace is offline   Reply With Quote
Old 04-07-2015, 10:30 AM   #780
Tech Rookie
 
Join Date: Apr 2015
Posts: 18
Default

What about the servo saver spring? Every brand specify how much is the preload of the servo saver spring. Preload is preference... ok, but Serpent must to specify a basic measure or not?
snakess is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
2013 FLORIDA WINTERNATS DATES jrice Nitro On-Road 288 10-02-2013 12:09 PM



Currently Active Users Viewing This Thread: 2 (0 members and 2 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 01:53 AM.


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