my twin hammers , starting an upgrade

[biggamehunter]

i have just ordered a 5v 5a hobbyking ubec but will i realy need it only running one 16kg servo on 2s max and why ?? is it because the operating voltage of the servo is 4.8v-6.0v and the bec will drop the battery volts feeding the servo to 5v to prevent damage to the servo fom high voltage feed from the 7.4v battery ?? and when i fit the ubec do i need to disconect the red lead from the rx throttle to esc and plug the ubec to bind plug on tx for power after conecting the battery red and black from ubec to esc battery red and black feeds ?? cheers shaun

[maxbonv]

Originally Posted by biggamehunter

i have just ordered a 5v 5a hobbyking ubec but will i realy need it only running one 16kg servo on 2s max and why ?? is it because the operating voltage of the servo is 4.8v-6.0v and the bec will drop the battery volts feeding the servo to 5v to prevent damage to the servo fom high voltage feed from the 7.4v battery ?? and when i fit the ubec do i need to disconect the red lead from the rx throttle to esc and plug the ubec to bind plug on tx for power after conecting the battery red and black from ubec to esc battery red and black feeds ?? cheers shaun

The reason why you need a BEC is as follows:
Do you have a servo for steering which uses more 1Ampere, but you have an ESC that is not able to deliver more than 1Ampere through its internal regulator (internal BEC), this is independent of the voltage 2s, you may also have an ESC able of running on 3s with the same problem.
The BEC reduces the voltage from 2s (some BEC bear up to 6S input) to a voltage compatible with Receiver and Servos, in your case you can choose 6 volts.

To make the electrical connections I thought I'd get a pleasure by posting a scheme:

[biggamehunter]

thanks greatly max for the pic/ diagram , thats exactly what i was trying to explain about disconecting the red wire for the esc feed , i bought a 5v 5a hobbyking UBEC that should do the job ?
5V 5A UBEC 2-5S Lipoly (7.2-21v)
i am not going to run the switch in the ubec battery wires max ? and is the battery feed in your diagram , equal to the bind plug on rx please ??

[maxbonv]

Originally Posted by biggamehunter

thanks greatly max for the pic/ diagram , thats exactly what i was trying to explain about disconecting the red wire for the esc feed , i bought a 5v 5a hobbyking UBEC that should do the job ?
5V 5A UBEC 2-5S Lipoly (7.2-21v)

This Bec is good for your work

Originally Posted by biggamehunter

i am not going to run the switch in the ubec battery wires max ?

is not a problem, in the scheme I have just write the most complete solution

Originally Posted by biggamehunter

and is the battery feed in your diagram , equal to the bind plug on rx please ??

Yes

[biggamehunter]

top job max !! thanks , do you run bec/ubec ?? i have unclipped the red throttle feed pin turned it back and put heat shrink over it to isolate it , so it can be returned to the plug if needed , cheers shaun

[maxbonv]

Please, do not understand, you can rephrase your question "do you run bec/ubec ?"

[biggamehunter]

do you use a bec ?

[maxbonv]

Originally Posted by biggamehunter

do you use a bec ?

Yes, i use a Castle Creation Bec, in my opinion the Top.
I use the Twin Hammers for races type trials, with little speed and tricky obstacles,
in these cases it is necessary to have more weight on the front axle,
Crawler type, and to steer is necessary a servo to 20Kg, consequently Bec required

[biggamehunter]

thanx max mine is set up and used more for fast running and rock racing than crawling hence the unlocked rear diff , i think the 16kg titanium will be more suitable for this type of running ?

[maxbonv]

Yes, I agree, 16kg is enough for your use, but not having the servo saver, I do not like the solution with titanium gears,
usually in Europe the servos with titanium main gear, have one aluminum gear that is broken, I prefer the servos with all steel gears.

[biggamehunter]

Originally Posted by maxbonv

Yes, I agree, 16kg is enough for your use, but not having the servo saver, I do not like the solution with titanium gears,
usually in Europe the servos with titanium main gear, have one aluminum gear that is broken, I prefer the servos with all steel gears.

good info max , but i come back to the titanium gear servo costing only £20 gbp so i cant even get a good steel gear one for that money ? and i am seriously thinking about a servo saver as i broke one all steel gear servo yesterday by just clipping one front wheel at speed ??

[biggamehunter]

just made and fitted a servo saver horn , i think it will work as coming down from a 4ft jump and landing on one front corner wheel will definately break that new servo without one i believe max ?
i also bought one of these as i dont think it will need a bec ? but a power capacitor , but the bec will benefit both servos , so if i wire the ubec i can choose either 6v-8.4v 24kg 0.14sec steel gear

http://www.hobbyking.co.uk/hobbyking...11sec_60g.html

[Rastaman]

I use a BEC in my hammerz as well, just like in all my crawlerz.. The castle one just like max uses too..

I've been running the shit outta mine, the last couple of days.. High jumps, big rolls, major crawling too, putting it to the test and no problems yet, very happy with it so far.. Today will be the biggest test yet.. Two mile hike, through some great scaling terrain.. I'll have a couple of pics posted on my thread tonite..

[biggamehunter]

what servo and horn are you running please rastaman ??

[biggamehunter]

i made a servo saver horn from an old tamiya tl01 part and used a stand off ball stud to space the steering pushrod evenly , also made some straight alloy servo mounts instead of the standard stepped ones ,
servo saver



stand off ball stud



servo mounts



new chassis fixings

[Pockets70]

I still want those rod ends. LOL.

[biggamehunter]

Originally Posted by Pockets70

I still want those rod ends. LOL.

[kookie31]

I with Pockets70, I want those rod ends as well!

[MrJugger]

Up for the rod ends
And crap, I was so happy I just bought a Savox 7.2Kg to replace the stock steering servo thinking it would do the job, just to realize now that I am not eaven at 50% from what seems to be needed :(

[biggamehunter]

i put a post on the general electrics section here and the general feeling is a 30kg plus for 2.2 rigs and 20kg plus for 1.9,s mr jugger , the turnigy high voltage 24kg i posted a link to ip the page is a good buy but this one is the boy for the job and cheap

TrackStar TS-910 Digital 1/8 Truggy/Monster Truck Steering Servo 66g / 30.6kg / 0.14sec