R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 04-19-2006, 11:32 PM   #1276
Tech Adept
 
Fsturbo15's Avatar
 
Join Date: Apr 2005
Posts: 170
Send a message via AIM to Fsturbo15
Default

Hi, I have a quick question about choice of steering servo in the MRX-4.

Which option would be best?

Airtronics .06/111 oz.
Airtronics .10/200 oz

I'm leaning toward the 200 oz servo.

Another option is a Hitec .08/128 oz.

Thanks.

BTW, anyone try the Serpent Ceramic thrust bearing on the mugen clutch.

It should fit, 5x10.
Fsturbo15 is offline   Reply With Quote
Old 04-20-2006, 01:23 AM   #1277
Tech Initiate
 
Join Date: Jan 2006
Posts: 36
Default help with the clutch

I just finished building the MRX4R
I am trynig to setup the clutch correctly.
First of all the thrust bearing, The Manual says
the larger diameter side should face the bearing.
but both sides look exactly the same to me!
What does the manual mean?

Second, about the shims... I assembled the clutch with no shim,
there is a small play ~0.5mm between the clutch and the bell,
and the bell spins freely. If I put just 1 shim, the bell will lock up and
there is no gap between the clutch and the bell.
Do I have it setup right?

This is my first centax clutch and the manual didn't really say much about
adjusting it. Any help is appreciated!
powerdrifter is offline   Reply With Quote
Old 04-20-2006, 01:37 AM   #1278
ND
Tech Adept
 
Join Date: Nov 2003
Posts: 103
Default

Quote:
Originally Posted by Fsturbo15
Hi, I have a quick question about choice of steering servo in the MRX-4.

Which option would be best?

Airtronics .06/111 oz.
Airtronics .10/200 oz

I'm leaning toward the 200 oz servo.

Another option is a Hitec .08/128 oz.

Thanks.

BTW, anyone try the Serpent Ceramic thrust bearing on the mugen clutch.

It should fit, 5x10.
I'd advise you to use the 200oz servo out of those 2. I don't know much about the Airtronics/Sanwa servos, but make sure they are metal geared as the steering servo take a lot of punishment. I've been using the KO digital servos with the heatsinks and they've been very good.
ND is offline   Reply With Quote
Old 04-20-2006, 01:59 AM   #1279
ND
Tech Adept
 
Join Date: Nov 2003
Posts: 103
Default

Quote:
Originally Posted by powerdrifter
I just finished building the MRX4R
I am trynig to setup the clutch correctly.
First of all the thrust bearing, The Manual says
the larger diameter side should face the bearing.
but both sides look exactly the same to me!
What does the manual mean?

Second, about the shims... I assembled the clutch with no shim,
there is a small play ~0.5mm between the clutch and the bell,
and the bell spins freely. If I put just 1 shim, the bell will lock up and
there is no gap between the clutch and the bell.
Do I have it setup right?

This is my first centax clutch and the manual didn't really say much about
adjusting it. Any help is appreciated!
Hello
The manual for the clutch is not to helpful if you've never built a centax before. What the manual means by the difference size thrust bearing washers is the internal diameter of the hole. Normally one is about 0.1mm smaller than the other, try measuring with a vernier caliper if you have one.

Shimming a centax clutch is quite simple and this is how I do it.

1. Assemble clutch as normal with all bearings, but do not put any shims between either the clucth shoe and clutch bell, or between the clutch bell and thrust race.

2. Using a vernier caliper (digital one is easier) push the clutch bell against the clutch shoe, and measure the distance between the end of the first gear and the end of the thrust bearing holder. Note this reading down

3. Copy the above step but with the clutch bell pulled as far away from the clutch shoe as possible. Note the reading down

4. Subtract the reading in step 3 from the reading in step 2 and this gives you the gap between clutch bell and clutch shoe. Most people tend to run this at 0.4mm

5. Place shims between the thrust bearing and its holder to achieve the gap you require.

6. With the gap set I know shim the clutch bell away from the clutch shoe,
this will stop the clutch bell dragging on the clutch shoe. For this I normally use a thrust bearing washer and as many clutch shims as needed. These shims are placed on the crankshaft before the first bearing goes on. What you want to achieve in this step is the clucth bell to have a slight amount of end float, but not for the clutch bell to be touching the clutch shoe.

This probably sounds very complicated but it really is quite simple. If you have a digital caliper rather than subtracting figures in step 4 you can just zero the caliper after step 2. A few companies make clutch gauges that allow you to measure the gap very simply.
ND is offline   Reply With Quote
Old 04-20-2006, 05:04 AM   #1280
Tech Elite
 
Join Date: Aug 2004
Location: Pole Position
Posts: 3,173
Trader Rating: 13 (93%+)
Default whats that big plastic bolt for securing the wing i see?

hey guys
im referring to the round plastic screw thing that you guys are uisng to secure your wing to the body ?

looks neat the way you guys make a long long so you can move the wing up and down.

also in the rear floating bodymount what do you screw in the big round holes on either side ?

are these parts extra i cant see them left over in thekit

thanks
__________________
Serpent 748 TQ | GIMAR Engines
Walter RC HObby | www.walterrchobby.com.au
BlueRC | www.bluerc.net
mrgsr is offline   Reply With Quote
Old 04-20-2006, 07:20 AM   #1281
ND
Tech Adept
 
Join Date: Nov 2003
Posts: 103
Default

Quote:
Originally Posted by mrgsr
hey guys
im referring to the round plastic screw thing that you guys are uisng to secure your wing to the body ?

looks neat the way you guys make a long long so you can move the wing up and down.

also in the rear floating bodymount what do you screw in the big round holes on either side ?

are these parts extra i cant see them left over in thekit

thanks
The rear wing is Mugen part number H1010, this is the lexan wing and the required plastic screws an nuts. This is an option part.

The screws in the bodymount do not come in the kit, but the ones that fit are the same that we use on the rear wing. I believe the mugen part number for these is H1006
ND is offline   Reply With Quote
Old 04-20-2006, 07:23 AM   #1282
Tech Elite
 
Join Date: Aug 2004
Location: Pole Position
Posts: 3,173
Trader Rating: 13 (93%+)
Default

Quote:
Originally Posted by ND
The rear wing is Mugen part number H1010, this is the lexan wing and the required plastic screws an nuts. This is an option part.

The screws in the bodymount do not come in the kit, but the ones that fit are the same that we use on the rear wing. I believe the mugen part number for these is H1006

Thanks! ill get the mugen wing
do you think the screws that goes into the body mount is worth it ?
Are they just to support the body ?

Thanks
__________________
Serpent 748 TQ | GIMAR Engines
Walter RC HObby | www.walterrchobby.com.au
BlueRC | www.bluerc.net
mrgsr is offline   Reply With Quote
Old 04-20-2006, 09:11 AM   #1283
Tech Master
 
cdelong's Avatar
 
Join Date: Jul 2004
Location: The Sunshine State
Posts: 1,805
Trader Rating: 12 (100%+)
Default

Quote:
Originally Posted by powerdrifter
First of all the thrust bearing, The Manual says
the larger diameter side should face the bearing.
but both sides look exactly the same to me!
What does the manual mean?
the inner diameter of the larger thrust bearing part is 5.15mm while the smaller one is 5.00mm

Quote:
Originally Posted by powerdrifter
Second, about the shims... I assembled the clutch with no shim, there is a small play ~0.5mm between the clutch and the bell,
and the bell spins freely. If I put just 1 shim, the bell will lock up and
there is no gap between the clutch and the bell.
Do I have it setup right?
Delta makes a nice tool to check your clutch setup. Like a previous user said, there are two measurements you need to be concerned with:

1). Clutchbell Endplay..... this is the measurement between the actual clutch disc and the fully extended position of the clutchbell. You must remove the inner clutchbell bearing and shims for this measurement. Lets just say you set this at 0.5mm. That means the clutch shoe must be forced out with centrifugal force 0.5mm for the clutch to engage the clutchbell.

2). Clutch disc to clutchbell clearance..... once you have #1 set, you put the inner shims and bearing back on. Just put on enough shims to get the clutchbell to stop dragging on the disc. Now when you check the endplay as in #1 it will be 0.5mm or less. It cannot be larger than 0.5mm now.

I don't know what you used for a shim or measuring tools, but clutch shims are 0.1mm or 0.2mm, so if you had 0.5mm endplay you could not bind it up with one shim.

Shoot for 0.4mm/0.4mm and you will be in good shape
__________________
KYOSHO EVOLVA
35PLUS21
FUTABA 3PKS/KO PROPO
BYRON'S FUEL/TWISTER TIRES
cdelong is offline   Reply With Quote
Old 04-20-2006, 10:17 AM   #1284
Tech Initiate
 
Join Date: Jan 2006
Posts: 36
Default clutch issue

Thanks guys for the replies!! I didn't know we are talking about
0.1 mm here... I don't have a digital caliber.. and there's almost no way
for me to notice the 0.15mm difference.

I got one question tho... what "inner shims" are you talking about?
There is no such thing on the manual... on the picture, it didn't
say we have to put shims to the insides behind the bearings.
I read that on the serpent site tho. So, did I miss something
or did the manual skipped the step?

I don't know the thickness of the shim... but all I know is.. once
I add one shim between the thrustbearing and the holder, all the end play
is gone, and the bell is stuck with the clutch. Does using 0 shim with the
new assembly make sense? thanks guys!
powerdrifter is offline   Reply With Quote
Old 04-20-2006, 10:29 AM   #1285
Tech Elite
 
HarKonnenD's Avatar
 
Join Date: Aug 2001
Location: Connecticut
Posts: 3,024
Trader Rating: 23 (100%+)
Send a message via AIM to HarKonnenD
Default

I add enough shims for preload so when I press the CB inward and turn slightly while holding the flywheel, it won't rub against the shoe. Then, I add enough shims by the thrust bearings so set the gap.

My first truing of the tires!!!!!!

http://www.rctech.net/forum/showthre...95#post2303295
__________________
Trying to live every day like its the last....
HarKonnenD is offline   Reply With Quote
Old 04-20-2006, 12:19 PM   #1286
ND
Tech Adept
 
Join Date: Nov 2003
Posts: 103
Default

Quote:
Originally Posted by mrgsr
Thanks! ill get the mugen wing
do you think the screws that goes into the body mount is worth it ?
Are they just to support the body ?

Thanks
Hello

The screws are just to support the body, but they do make a difference depending on how quick your going. Some bodies don't require them, some do. They're not going to make a hugh difference to the handling.
ND is offline   Reply With Quote
Old 04-21-2006, 04:12 AM   #1287
Tech Elite
 
Join Date: Aug 2004
Location: Pole Position
Posts: 3,173
Trader Rating: 13 (93%+)
Default 1 piece engine mount..

what do you guys think of this as a hopup

is it a bling factor or does it actaully help in the rigity of the chassis ?

thanks
trying to work out if its worg the money or if i should spend the money on a setup system instead.

thanks
__________________
Serpent 748 TQ | GIMAR Engines
Walter RC HObby | www.walterrchobby.com.au
BlueRC | www.bluerc.net
mrgsr is offline   Reply With Quote
Old 04-21-2006, 06:10 AM   #1288
Tech Elite
 
HarKonnenD's Avatar
 
Join Date: Aug 2001
Location: Connecticut
Posts: 3,024
Trader Rating: 23 (100%+)
Send a message via AIM to HarKonnenD
Default

I may get it...some say it helps, but you will benefit more from a Hudy setup system instead as you could be running a seriously off-car and not know it. I have.
__________________
Trying to live every day like its the last....
HarKonnenD is offline   Reply With Quote
Old 04-21-2006, 06:25 AM   #1289
Tech Elite
 
Join Date: Aug 2004
Location: Pole Position
Posts: 3,173
Trader Rating: 13 (93%+)
Default

thanks for the reply dude
yeh i gave the 1 piece a miss

what do u guys think of the pmb setup systems ?

the hudy is heaps expensive

i only use the setup system to check my toe and steering throw
__________________
Serpent 748 TQ | GIMAR Engines
Walter RC HObby | www.walterrchobby.com.au
BlueRC | www.bluerc.net
mrgsr is offline   Reply With Quote
Old 04-21-2006, 06:36 AM   #1290
M7H
Tech Elite
 
M7H's Avatar
 
Join Date: Dec 2004
Location: The Netherlands
Posts: 2,196
Default

Quote:
Originally Posted by mrgsr
thanks for the reply dude
yeh i gave the 1 piece a miss

what do u guys think of the pmb setup systems ?

the hudy is heaps expensive

i only use the setup system to check my toe and steering throw
what about camber... really important to set that right.....
__________________
Serpent
M7H is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
MUGEN MBX5R/MUGEN MBX5T PROSPEC/TRAXXAS RACE REVO Jason Halvorson R/C Items: For Sale/Trade 14 01-12-2008 10:32 AM
Mugen 5T Chassis, Mugen 46 Tooth Pinion, Associated Ride Height Gauge bretzkej R/C Items: For Sale/Trade 1 08-19-2007 06:31 PM
USA's Most Wanted FOR SALE Mugen MBX5R,Losi 8 comp, and Mugen MBX5T Prospec Truggy nobike R/C Items: For Sale/Trade 69 04-28-2007 07:45 PM
Another MTX3 prospec w lots of parts and an optional Mugen X12 w Mugen pipe Scott Fisher R/C Items: For Sale/Trade 11 11-21-2005 05:45 PM
drake xxx nt and mugen mst-1+extras......Looking for a kanai 2 or maybe mugen buggy [email protected] R/C Items: For Sale/Trade 5 06-30-2003 09:31 PM



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 11:10 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net