RCCrawler Forums

kc092755 · 09-23-2009, 10:37 PM

Thank you JeremyH,

Do you know how to separate a 6 batteries pack to 2 triangle style 3 batteries pack?
Thanx!

JeremyH · 09-24-2009, 07:14 AM

Yep, just take the battery pack apart, unsloder all of the connecting bars and reconfigure them exactly how you like! Here's a basic wiring diagram:

kc092755 · 09-24-2009, 08:07 AM

Thank you very much.

kc092755 · 10-02-2009, 09:54 PM

Hi JeremyH,
Is it possible to build a truck (without body) that can drive even it is up side down (flip over)?
are those super class truck capable to do it?
Thanx!

JeremyH · 10-04-2009, 01:44 PM

Sure it's possible. You just need the right ratio of tire size to chassis height. It will take a bit of work on your part....

kc092755 · 10-04-2009, 09:58 PM

Thank you JeremyH,
but how to deal with the shocks?

What kind of plug is this?
I saw a lot of trucks using this plug, could you give me a link?

Could you also recommend a good c/p ESC?
My old futaba ESC is a bit difficult to control the speed.
Thanx!

JeremyH · 10-05-2009, 04:36 AM

Dealing with the shocks will really depend on the rest of your setup.

The plug pictured above is called a Deans plug. Here is a link:
http://www3.towerhobbies.com/cgi-bin...&I=LXKX39&P=ML
(female end for the battery, male for the other side)

As for an ESC, I have had really good luck with the Castle Creations stuff.....especially the Sidewinder:
http://www3.towerhobbies.com/cgi-bin...&I=LXUTA0&P=ML

The Sidewinder can be programmed manually, but it is much easier to do if you have the Castle Link:
http://www3.towerhobbies.com/cgi-bin...?&I=LXGVR8&P=M

The Link allows you to hook the ESC up to your computer and change any parameters that you wish.

sweli · 10-05-2009, 06:45 AM

Hey kc092755,

One thing to note on ESCs for crawling. You want an ESC that has either a drag brake or a hold brake.

The Castle Creation products JeremyH are mentioning are great. I have two Sidewinder Micros's. CC is great if you ever need repairs. The Castle Link is worth the money. It can be used to program their BEC (battery eliminator circuit). Some people have reported back that they feel like the drag brake on the Sidewinder models is a little weaker then on the Castle Creations Mamba models. I do not have a personal comparison to go on.

I have had good luck with the Novak Rooster Crawler Edition as well. It has a HOLD brake which I like. It took getting used to, but now that I have used it a year, it's hard to go back to drag brakes. It essentially stops you like full brakes, when the throttle is returned to neutral, then holds you there without allowing the wheels to roll.
On fast downslopes or on a rig with a lot of wheel speed, it can be harder on the drivetrane and sometimes cause you to endo.

On other models, Novak has gone to drag brakes over the hold type.

JeremyH · 10-05-2009, 06:51 AM

Quote:

Originally Posted by sweli

Some people have reported back that they feel like the drag brake on the Sidewinder models is a little weaker then on the Castle Creations Mamba models. I do not have a personal comparison to go on.

Yeah, some folks dont like the drag brake on the Sidewinder, but that really depends on the motor you are running. I run brushed motors and the stiffest springs I can find and have never had a problem with the drag brake on any of my Castle ESCs.

sweli · 10-05-2009, 07:05 AM

Another thing to think about is how you are powering your steering servo.
You will need a fairly beefy servo to get you through binds.
Most people go with something above 300oz of torque.

Servos of that kind require some power. They get more torque running at the max of 6v.
Most people run BECs. Castle makes two of the best. Their smaller one has been the standard and works great. But it comes out of the box set at 5+v. You need the Castle Link mentioned to program it to a higher voltage.

I looked and cannot find what BEC voltage and current the 1/10 Sidewinder puts out??

I have had good luck with the built in BEC on my Novak Rooster Crawler. It puts out 6v, 5amp. I only saw it start to hit its limit when I used it to run a crazy 1/4 scale servo and 5.75" tires. To take the load off of it, I now run it with a Castle BEC.

Ebay
Roosters:
http://toys.shop.ebay.com/Radio-Cont...=p3286.c0.m282

Sidewinder (sort out the micros, those are for smaller rigs)
http://toys.shop.ebay.com/i.html?_nk...o&_osacat=2562

OR you could search for used Castle Creations Mamba
http://toys.shop.ebay.com/i.html?_nk...a&_osacat=2562

Castle BECs
http://toys.shop.ebay.com/i.html?_nk...r&_osacat=2562

kc092755 · 10-06-2009, 08:12 AM

Thank you guys for the detail info.

Boy, they are not cheap, about 1/2 price of TLT-1.
Are they OK to run by a 7.2v battery pack?
Is BEC necessary?
How about Futaba MC330CR?
thanx!

sweli · 10-06-2009, 10:17 AM

Quote:

Originally Posted by kc092755

Thank you guys for the detail info.

Boy, they are not cheap, about 1/2 price of TLT-1.
Are they OK to run by a 7.2v battery pack?
Is BEC necessary?
How about Futaba MC330CR?
thanx!

That will work, but probably will start to frustrate you along the way if you get onto some rocks.

Futaba web site did not have the tech manual for the 330cr.
It has a BEC, but they do not say what it puts out, which leads me to think about 2amp at 5v.
The 5v output will not take advantage of the torque a servo can put out at 6v.
Low amp output will limit what servo you can run. If you try and run a more powerful servo (greater then 180oz) your ESC will spend more energy trying to move the servo and start to glitch moving the motor.

That ESC will have brakes or ABS brakes, but not a DRAG or HOLD brake.
As your climbing UP rocks or an incline, and let off the throttle to decide a route to take, the rig will roll backwards.
Vise-versa when climbing down a rock, it will start to roll faster and faster downhill.
Drag brakes drastically slow this rolling. Hold brakes pretty much hold the rig stopped.

Some of the ESCs have a powerful enought BEC built in to provide power for up to 200 or 250 oz servos.
The Novak Rooster Crawler is one of these.
You can find them used for about $50-60.

kc092755 · 10-06-2009, 11:29 AM

Thank you very much sweli,

If I put 2 13kg servo for front and rear steering,
and a Novak Rooster Crawler for speed control,
what is your opinion?
Thanx!

JeremyH · 10-06-2009, 12:12 PM

Yep, the electronics can get rather expensive.

KC, if you plan to run dual servos, then it's best if you can buy an external BEC...

sweli · 10-06-2009, 12:25 PM

Just an opinion (from someone who has only been back into RC for 18mo), is that two 13kg (180in-oz) would be right at the edge of what the BEC can put out.

Not sure what servo's you are planning on. Search around and see if you can find the expanded specs on them and if they show the 'Stall current'.

If you look on the Servo City site, it lists the stall current for about half the servos it sells.

Example:
Hitec HS-6985HB = 173 in-oz Draws 3amp at stall.
Two of these would cause the ESC to 'brown out' or possible cause some damage.
http://www.servocity.com/html/hs-698..._coreless.html

kc092755 · 10-06-2009, 09:10 PM

Thank you guys,

Is 75T motor OK for Novak Rooster Crawler ESC?

The servo I mentioned is Towerpro MG995 13kg version,
I plan to install 1 for front steering first to see how it performs.

I'm not sure the specs below are all correct,
Thanx!

Operating Speed (4.8V no load) : 0.17sec / 60 degrees (4.8v)
Operating Speed (6.0V no load) : 0.13sec / 60 degrees (6.0v)
Stall Torque (4.8V): (13kg/cm) (180oz/in.)
Stall Torque (6.0V): (15kg/cm) (208oz/in.)
Temperature Range: -30 to +60 Degree C
Dead Band Width: 4usec
Operation Voltage: 3.0 - 7.2Volts

kc092755 · 10-06-2009, 09:23 PM

Quote:

Originally Posted by JeremyH

Sure it's possible. You just need the right ratio of tire size to chassis height. It will take a bit of work on your part....

Hi JeremyH,
I don't know what key word to search,
Could you give me some links to see how it looks and how it builds?
Thanx!

JeremyH · 10-07-2009, 08:51 AM

KC, I'm not sure that there will be a good phrase to search for. You just need to focus on lowering the suspension and increase the tire diameter.

BTW, 75T might be a bit slow. Which transmission did you end up going with? I tend to like 45T motors with my TLTs....

kc092755 · 10-07-2009, 10:27 AM

Quote:

Originally Posted by JeremyH

.....................
BTW, 75T might be a bit slow. Which transmission did you end up going with? I tend to like 45T motors with my TLTs....

As you recommended, I bought a AX10 tranny with 12T and 90T,
probably because the old Futaba ESC, I need to move the control stick about 10mm to move the truck, then the truck speed still faster than I expect,
I guess the ESC is not sensitive enough.
Thanx!

sweli · 10-07-2009, 11:10 AM

Quote:

Originally Posted by kc092755

As you recommended, I bought a AX10 tranny with 12T and 90T,
probably because the old Futaba ESC, I need to move the control stick about 10mm to move the truck, then the truck speed still faster than I expect,
I guess the ESC is not sensitive enough.
Thanx!

Are you still using the stock 'silver can' motor?
Yes the Rooster Crawler will handle pretty much any 540 sized motor above 27T (with 6 cells).

I have tried the tower pro servos in the past. Worked pretty good for about 4 months and then died. Sometimes you get one that is a little twitchy trying to center itself.

I realize this can be an expensive hobby.
With the electronics you pretty much 'get what you pay for'. Which means the more expensive the stuff, the better it usually is.
I tend to buy peoples expensive but USED stuff.

I run a CRAZY 1/4 scale servo on my TLT rig. It is big and heavy, but only cost me $25 and puts out over 300oz of torque. I run it at 6.3v which probably gives me 400oz of torque.
Replacement gears, if they strip are only $4.
It is a Hobbico CS-80. Tower Hobbies (in the US) has a TS-80 that is the same thing.
I have room on my rig for it, because it is a torsion rig.
BMV Torsion (TLT Axles) Reborn w/DIG etc

09-24-2009, 08:07 AM	#43
kc092755 Pebble Pounder Join Date: Aug 2009 Location: taiwan Posts: 146	Thank you very much. Last edited by kc092755; 09-24-2009 at 10:13 AM.

10-02-2009, 09:54 PM	#44
kc092755 Pebble Pounder Join Date: Aug 2009 Location: taiwan Posts: 146	Hi JeremyH, Is it possible to build a truck (without body) that can drive even it is up side down (flip over)? are those super class truck capable to do it? Thanx! Last edited by kc092755; 10-03-2009 at 04:31 AM.

10-04-2009, 09:58 PM	#46
kc092755 Pebble Pounder Join Date: Aug 2009 Location: taiwan Posts: 146	Thank you JeremyH, but how to deal with the shocks? What kind of plug is this? I saw a lot of trucks using this plug, could you give me a link? Could you also recommend a good c/p ESC? My old futaba ESC is a bit difficult to control the speed. Thanx! Last edited by kc092755; 10-04-2009 at 10:29 PM.

10-06-2009, 08:12 AM	#51
kc092755 Pebble Pounder Join Date: Aug 2009 Location: taiwan Posts: 146	Thank you guys for the detail info. Boy, they are not cheap, about 1/2 price of TLT-1. Are they OK to run by a 7.2v battery pack? Is BEC necessary? How about Futaba MC330CR? thanx! Last edited by kc092755; 10-06-2009 at 08:19 AM.

10-06-2009, 09:10 PM	#56
kc092755 Pebble Pounder Join Date: Aug 2009 Location: taiwan Posts: 146	Thank you guys, Is 75T motor OK for Novak Rooster Crawler ESC? The servo I mentioned is Towerpro MG995 13kg version, I plan to install 1 for front steering first to see how it performs. I'm not sure the specs below are all correct, Thanx! Operating Speed (4.8V no load) : 0.17sec / 60 degrees (4.8v) Operating Speed (6.0V no load) : 0.13sec / 60 degrees (6.0v) Stall Torque (4.8V): (13kg/cm) (180oz/in.) Stall Torque (6.0V): (15kg/cm) (208oz/in.) Temperature Range: -30 to +60 Degree C Dead Band Width: 4usec Operation Voltage: 3.0 - 7.2Volts Last edited by kc092755; 10-06-2009 at 09:58 PM.

09-23-2009, 10:37 PM	#41
kc092755 Pebble Pounder Join Date: Aug 2009 Location: taiwan Posts: 146	Thank you JeremyH, Do you know how to separate a 6 batteries pack to 2 triangle style 3 batteries pack? Thanx!

09-24-2009, 07:14 AM	#42
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Yep, just take the battery pack apart, unsloder all of the connecting bars and reconfigure them exactly how you like! Here's a basic wiring diagram:

10-04-2009, 01:44 PM	#45
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Sure it's possible. You just need the right ratio of tire size to chassis height. It will take a bit of work on your part....

10-05-2009, 04:36 AM	#47
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Dealing with the shocks will really depend on the rest of your setup. The plug pictured above is called a Deans plug. Here is a link: http://www3.towerhobbies.com/cgi-bin...&I=LXKX39&P=ML (female end for the battery, male for the other side) As for an ESC, I have had really good luck with the Castle Creations stuff.....especially the Sidewinder: http://www3.towerhobbies.com/cgi-bin...&I=LXUTA0&P=ML The Sidewinder can be programmed manually, but it is much easier to do if you have the Castle Link: http://www3.towerhobbies.com/cgi-bin...?&I=LXGVR8&P=M The Link allows you to hook the ESC up to your computer and change any parameters that you wish.

10-05-2009, 06:45 AM	#48
sweli RCC Addict Join Date: Jan 2008 Location: Lake Michigan Posts: 1,898	Hey kc092755, One thing to note on ESCs for crawling. You want an ESC that has either a drag brake or a hold brake. The Castle Creation products JeremyH are mentioning are great. I have two Sidewinder Micros's. CC is great if you ever need repairs. The Castle Link is worth the money. It can be used to program their BEC (battery eliminator circuit). Some people have reported back that they feel like the drag brake on the Sidewinder models is a little weaker then on the Castle Creations Mamba models. I do not have a personal comparison to go on. I have had good luck with the Novak Rooster Crawler Edition as well. It has a HOLD brake which I like. It took getting used to, but now that I have used it a year, it's hard to go back to drag brakes. It essentially stops you like full brakes, when the throttle is returned to neutral, then holds you there without allowing the wheels to roll. On fast downslopes or on a rig with a lot of wheel speed, it can be harder on the drivetrane and sometimes cause you to endo. On other models, Novak has gone to drag brakes over the hold type.

10-05-2009, 07:05 AM	#50
sweli RCC Addict Join Date: Jan 2008 Location: Lake Michigan Posts: 1,898	Another thing to think about is how you are powering your steering servo. You will need a fairly beefy servo to get you through binds. Most people go with something above 300oz of torque. Servos of that kind require some power. They get more torque running at the max of 6v. Most people run BECs. Castle makes two of the best. Their smaller one has been the standard and works great. But it comes out of the box set at 5+v. You need the Castle Link mentioned to program it to a higher voltage. I looked and cannot find what BEC voltage and current the 1/10 Sidewinder puts out?? I have had good luck with the built in BEC on my Novak Rooster Crawler. It puts out 6v, 5amp. I only saw it start to hit its limit when I used it to run a crazy 1/4 scale servo and 5.75" tires. To take the load off of it, I now run it with a Castle BEC. Ebay Roosters: http://toys.shop.ebay.com/Radio-Cont...=p3286.c0.m282 Sidewinder (sort out the micros, those are for smaller rigs) http://toys.shop.ebay.com/i.html?_nk...o&_osacat=2562 OR you could search for used Castle Creations Mamba http://toys.shop.ebay.com/i.html?_nk...a&_osacat=2562 Castle BECs http://toys.shop.ebay.com/i.html?_nk...r&_osacat=2562

10-06-2009, 11:29 AM	#53
kc092755 Pebble Pounder Join Date: Aug 2009 Location: taiwan Posts: 146	Thank you very much sweli, If I put 2 13kg servo for front and rear steering, and a Novak Rooster Crawler for speed control, what is your opinion? Thanx!

10-06-2009, 12:12 PM	#54
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Yep, the electronics can get rather expensive. KC, if you plan to run dual servos, then it's best if you can buy an external BEC...

10-06-2009, 12:25 PM	#55
sweli RCC Addict Join Date: Jan 2008 Location: Lake Michigan Posts: 1,898	Just an opinion (from someone who has only been back into RC for 18mo), is that two 13kg (180in-oz) would be right at the edge of what the BEC can put out. Not sure what servo's you are planning on. Search around and see if you can find the expanded specs on them and if they show the 'Stall current'. If you look on the Servo City site, it lists the stall current for about half the servos it sells. Example: Hitec HS-6985HB = 173 in-oz Draws 3amp at stall. Two of these would cause the ESC to 'brown out' or possible cause some damage. http://www.servocity.com/html/hs-698..._coreless.html

10-07-2009, 08:51 AM	#58
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	KC, I'm not sure that there will be a good phrase to search for. You just need to focus on lowering the suspension and increase the tire diameter. BTW, 75T might be a bit slow. Which transmission did you end up going with? I tend to like 45T motors with my TLTs....

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