JR or Hitec, Digital or non?

[Blade~400~er]

Originally Posted by M.Huerta

the digitals are not needed, the best 450 pilots fly with the analogs and look at the precision of their flying.

exactly...only a hardcore 3d pilot is going ot be able to tell the diff bwtween a digital servo and analog servo while in flight....

[Arsenix2001]

I wouldnt disagree at all... I just am curious how much difference the digitas will make on centering.. allowing for a better set up, and a more controlled feel in a hover or FF, where it usually gets mushy. And alas, it will always be there for the day i get ballz to try some extreme 3D

[mpdc]

When using the jr285 in the b400 do you need to make any adjustments to transmitter?

[sokal]

Originally Posted by mpdc

When using the jr285 in the b400 do you need to make any adjustments to transmitter?

every servo has a diffrent rotoation rate and distance
all servos have a diffrent setting

[mpdc]

How woiuld i find those settings. My thought was to remove and replace stock servos.Possible?

[Penguin]

Originally Posted by Arsenix2001

Well scratch that last post, I cancelled my JR order and decided to give the 5065's a try, with thier speed and now being digital, id imagine they will hopefully have that locked in feel too. At this point, alittle bit of frame grinding is the last thing I am worried about

You're gonna love em. I never installed them on my B400 but they sure perform great on my Rex 450! Great servo for sure.

[sokal]

Originally Posted by mpdc

How woiuld i find those settings. My thought was to remove and replace stock servos.Possible?

yes just swasp them out HS require a lil filing of the frame not much

you may have to lower you swashmix and make sure the swash remain level at full ranges

thats why i just recomend doing a full head setup along with servo swap out

[mpdc]

Thanks for your help. I'll look for vids/info.

[Dirtmagnet400]

Just got my DS285's today, and in the process of install! I decided to go through the whole bird and do a complete, like new, setup while i was at it, since i bought it used. So far the servo's are installed, motor bearings lubed, main shaft checked for straightness, removed and repacked the one-way in the main gear, locktited all the swash balls, and leveled the swash. I am learning a ton doing this! and enjoying it too!! Thanks to Sokal and Jasmine for their vids, and Slyster for the bible! I love this place!!

[Helihangover]

Hey guys.. I am in the process of upgrading servos to.. Ordered 3400g jr last week for the tail. They said it changed out to a different newer servo.. Don't know which one yet..
Anyway my question was about the Jr DS287 cyclics.. Aren't they twice as fast as the 285's? Atleast that is what it shows on jr's website.. Why don't people use the 287 over the 285 or the 290's??
Just woundering..

[sokal]

Originally Posted by Helihangover

Hey guys.. I am in the process of upgrading servos to.. Ordered 3400g jr last week for the tail. They said it changed out to a different newer servo.. Don't know which one yet..
Anyway my question was about the Jr DS287 cyclics.. Aren't they twice as fast as the 285's? Atleast that is what it shows on jr's website.. Why don't people use the 287 over the 285 or the 290's??
Just woundering..

287 are faster but weaker
285 slower but stronger
the 290G is a tail servo posibly be used on cyclic

torque is your friend it lets the servo move at the speed specified unless the force against is more than torque abilitys

i prefer the torque over the speed

[Helihangover]

I went to pick up my 3400g today from the lhs .. They said it was replaced by i think it was the ds3421 .. I told him i thought it was replaced by the 3500g.. I got to looking, the 3421 is alot slower but more torque.. Is it going to be to slow for a tail servo.. If so i will send it back for the 3500g..

DS3421 Digital Mini MG Servo Specs
Size Category: Minis and Micros Type: Digital Torque: 65 oz/in @ 4.8V , 75 oz/in @ 6V Speed: .18 sec/60° @ 4.8V, .15 sec/60° @ 6V Dimensions (WxLxH): 0.58 x 1.30 x 1.02 Weight: 1.04 oz

[Arsenix2001]

yeah that thing isnt going to work... most tail servos are in the .06 to .09 speed range with 20-30oz tq. That thing is going to be crazy slow even at 6v. Looks like a cyclic servo

[sokal]

Originally Posted by Helihangover

I went to pick up my 3400g today from the lhs .. They said it was replaced by i think it was the ds3421 .. I told him i thought it was replaced by the 3500g.. I got to looking, the 3421 is alot slower but more torque.. Is it going to be to slow for a tail servo.. If so i will send it back for the 3500g..

DS3421 Digital Mini MG Servo Specs
Size Category: Minis and Micros Type: Digital Torque: 65 oz/in @ 4.8V , 75 oz/in @ 6V Speed: .18 sec/60° @ 4.8V, .15 sec/60° @ 6V Dimensions (WxLxH): 0.58 x 1.30 x 1.02 Weight: 1.04 oz

agree not a tail/gyro servo

i tell ya hobby shops will sell you poop if they thought you would buy in to it

[Helihangover]

Went by the LHS to check on my servo.. I listed the wrong servo in the post yesterday..The Lhs orders their parts from horizion hobbies. So he called them today to see exactly which servo replaced the jr3400g. They said it was the jr3517mg.. The guy at horizon perceeded to tell him that it was wrong on the JR website about the 3500g replacing the 3400g.. He said they must not have updated it yet...lol. Now i am a newb on all this heli stuff but, I do know how to read.. And the 3517 was not designed to be a tail servo. It has pretty good specs though. And the 3500g is actually cheaper. So to me it would just make better sense to get the faster of the 2 if it cheaper.. But the so called pro's that sell the stuff tell me otherwise..Think i will go with what my fellow freak's suggest.. Yall haven't led me astray yet.. Just thought it was all a little funny to me..
I will have to defend the hobby store owner.. He told me when I bought the heli that he just sold them, he was into model trains himself and didn't know much about heli's..He's actually been honest from the getgo..But the horizion guy he is suppose to know his sh@# right?

Here is what it says on JR's website about it all..lol

DS3500G Ultra Speed Mini Gyro Servo
Overview
It wasn't easy to improve on the 3400G servo with a 770 3D gyro for 450- and 500-size mini electric helis, but JR engineers have done it. The new DS3500G boasts .06 transit time along with big-servo precision. Provides "big helicopter feel" for ultra-precise hovering and locked-in yaw control for aggressive 3D performance.



Key Features

• Ultra-speed servo for instant tail control reaction
• Ultra precision nylon gears
• Perfect for 450- to 500-size helis
• JR's legendary digital holding power and resolution

Here is what the 3517 page says..you decide.

DS3517MG High Speed Mini Servo MG
Overview

JR's DS3517MG provides fast speed and high resolution for superior 3D characteristics for small airplanes. High resolution assures precise centering for predictable flying—especially important with large control surfaces. As a cyclic servo in 500-class electric helis, the DS3517MG provides a locked-in hover as well as extremely responsive collective and cyclic response for extreme 3D maneuvering.

[Arsenix2001]

go with the 3500 without a doubt... that other servo is still not a rudder servo, it appears to be a coreless 450/500 class cyclic application. still too slow for all that $$ .09 at 6v, even my 9257 cranks .08 at 4.8v

[Helihangover]

Yeah I am going to go with the 3500g.. Gotta get the LHS to send the other one back. I got a month to burn while I wait on my dx6i to get back. Just sent it off monday. The guy at the hobby shop told me to go home and look it up myself to make sure and call him back tomorrow. I even wrote JR an email just to make sure the didn't have it wrong on their website..Kinda makes me feel a little scared to ever take advice from the guys over at horizion from now on..It was just funny to sit there on the phone with the guy at hh while he looked up on JR's website. Then say that JR's website must be wrong.. It's like he must have thought he really couldn't have been wrong himself..It really ticks me off when you show someone their wrong and they still try to sound smart and talk their way out of it..Oh well,guess this world is full of em..Hell i guess I can be one myself every now and then..

[Penguin]

The 3500 is a great tail servo but be aware its 5V only. If you are running 6V now or plan to in the future, you can just throw an Aling 5.1V voltage regulator on the tail servo.

[helibrew]

Will the JR 3500G require a BEC? Does it work at
275Hz, or does it work at the same Hz as the stock tail servo?

I am getting ready to upgrade my heli, and would like to order everything at once. Does anyone know of anything else required to upgrade to a GY401/3500G?

Thanks, this site is a life line!

[sokal]

Originally Posted by helibrew

Will the JR 3500G require a BEC? Does it work at
275Hz, or does it work at the same Hz as the stock tail servo?

I am getting ready to upgrade my heli, and would like to order everything at once. Does anyone know of anything else required to upgrade to a GY401/3500G?

Thanks, this site is a life line!

its always best to run a bec
i ran the 285/3400/401 all with out an bec with no issues but having one is a safe option.

the 3500 only works on 5v so if u do install a bec and wish to run 6v you will have to buy a stepdown for it


as for the hz this servo is designed to work as a tail servo and a gyro. so it more than able to run in digital mode on the gyro

id recommend the cyclic servos as well but tail is the best place to start