Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > 500 Class Electric Helicopters > 500 Pro Class Electric Helicopters


500 Pro Class Electric Helicopters 500 Pro Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


Reply
 
Thread Tools Display Modes
Old 09-29-2011, 04:08 PM   #1
dunkonu23
Registered Users
 
Posts: 10,202
 

Join Date: Jan 2009
Location: Michigan, East of Hell
Default Metal Servo Arms: Good or Bad?

I'm sorry but I don't think having metal servo arms is a good thing with this helicopter. Metal arms on larger helicopters with metal servo cases in an FBL situation is great if you're a pro, but on a smaller helicopter with plastic servo cases I think it's overkill and is asking for trouble. Trouble in the form of destroyed servos in the event of a hard crash (or maybe even a light crash if it's hit right) where a plastic servo arm would normally break. Overkill in that the torque needed to move the head isn't as great as with a larger helicopter and I sincerely doubt the standard arms would flex at all during hard moves.

What do you think?

The rest of the helicopter looks cool, especially the drive train. I may be getting that gear set for my ESP. It's also cool the way Align has taken into account elevator arm touching the tail drive gearbox and antirotation braket at the extremes.

It's just my opinion.

Scott
__________________
Team Manager
Spartan Vortex Inside, Cyclone Blades, Team Scorpion
Team OMGRCUSA Servos Manager):>
RCBearings.com Tech Rep
dunkonu23 is offline        Reply With Quote
Old 09-29-2011, 05:12 PM   #2
akamullen
Registered Users
 
Posts: 3,997
 
My HF Map location
Join Date: Feb 2009
Location: Wisconsin
Default

IMO before you would strip the gears on a metal gear servo the plastic ball links would go . I have metal arms on all my birds that they fit on and have broken many plastic ball links but never stripped gears or wrecked a servo due to a metal arm in a crash.
__________________
AnythingHeli.com OWNER/ TEAM PILOT
GAUI X5 / X7 *
GOBLIN 500-x2/630/770 * TREX 450DFC@6S * Swinging GAUI/RJX/RAIL & SAB Blades * Microbeast/IKON * Castle ESC's on all * DX18 *
akamullen is offline        Reply With Quote
Old 09-30-2011, 07:02 AM   #3
hndaluvr
Registered Users
 
Posts: 746
 

Join Date: Apr 2010
Location: Delaware
Default

I've actually witnessed all 3 situations happen... plastic arms breaking, ball link breaking, and gears mangling. I kind of agree that plastic arms are a safer option, considering that a new gear set is ~$25... each
I have a new 500EFL, and while the metal arms look real nice, they are real PITA to get on/off, and i fear destroying a servo upon any unfortunate encounter with the ground.
I just ordered the a plastic set, and will use those until i determine whether ANY arm makes a difference in crash-ability.
hndaluvr is online now        Reply With Quote
Old 09-30-2011, 07:18 AM   #4
rotaryguy
Registered Users
 
My HF Map location
Join Date: Oct 2005
Location: Florida-USA
Default

I created a thread on this. How to easily remove aluminum servo arms-
http://www.helifreak.com/showthread.php?t=342424
rotaryguy is offline        Reply With Quote
Old 09-30-2011, 10:44 AM   #5
dunkonu23
Registered Users
 
Posts: 10,202
Thread Starter Thread Starter
 

Join Date: Jan 2009
Location: Michigan, East of Hell
Default

That's a really cool solution for removing the arm.

I've been the brunt of the worse end of the spectrum when using a metal arm. I had two servos on my first helicopter get completely destroyed. I'm talking plastic case ripped to shreds, gears broken, circuit board broken, and I never found the motor from the servos... all due to a blade ejection. I haven't used metal arms since.

Scott
__________________
Team Manager
Spartan Vortex Inside, Cyclone Blades, Team Scorpion
Team OMGRCUSA Servos Manager):>
RCBearings.com Tech Rep
dunkonu23 is offline        Reply With Quote
Old 09-30-2011, 11:48 AM   #6
hndaluvr
Registered Users
 
Posts: 746
 

Join Date: Apr 2010
Location: Delaware
Default

Quote:
Originally Posted by rotaryguy View Post
I created a thread on this. How to easily remove aluminum servo arms-
http://www.helifreak.com/showthread.php?t=342424

Brilliant!.... will do... uhhhh, but this means that i'll have to curse one more time while taking 'em off to do the mod
hndaluvr is online now        Reply With Quote
Old 09-30-2011, 01:21 PM   #7
Shawn Behrens
Registered Users
 
My HF Map location
Join Date: Jan 2007
Location: DEEP IN THE BOG
Default

I completely agree that on this size machine metal arms are a terrible idea (atleast from the consumer standpoint). The metal arms are pure bling and another way for align to make more money selling gear sets for the servos. I am using the + shaped arms on my 500 pro and by using those arms I am actually getting a better fbl setup by gaining better resolution from the actual servo ( vs playing with geometry mechanically above the swash by changing out balls). I don't believe that running plastic arms on the 500 pro will save your servo gear sets in every crash but it will give them a fighting chance. On larger 90 size machines I run metal servo horns out of necessity, the plastic sero horns will jump splines on the output gear due to much much higher loads placed upon the servo. Keep in mind the output spline on these 1 oz ds510 servos is the same as the output spline on the full-size 2 oz ds610 servos.

shawn

Last edited by Shawn Behrens; 09-30-2011 at 03:19 PM..
Shawn Behrens is offline        Reply With Quote
Old 10-02-2011, 03:41 AM   #8
Stevin
Registered Users
 
Posts: 2,016
 

Join Date: May 2011
Location: bronx , ny
Default

I think the reason metal servo arms are ow being offered with stock fbl kits is they are more rigid and the flybarless system needs to constintely make adjustments to itself. The metal arms will make those exact without flex. Maybe not as crucial on this size bird but anything bigger yes.
__________________
Avant E-Aurora FBL Vbar 5.3pro / Trex 450 pro vbar 5.3pro/ Velocity50 Vbar 5.3pro / Trex 600efl PRO Flybarless vbar/CC HV80 / Outrage 550 VBAR5.2Pro/ICE100 Heliflightcenter Team Pilot
Stevin is online now        Reply With Quote
Old 10-02-2011, 10:37 AM   #9
dunkonu23
Registered Users
 
Posts: 10,202
Thread Starter Thread Starter
 

Join Date: Jan 2009
Location: Michigan, East of Hell
Default

Here's a little tidbit that you may find interesting. Metal arms are not currently included with the 550 V2 FBL kit. I'm helping a friend build a 550 V2 FBL. He was one of the first to get one, though. Maybe in later kits, but not in his.

Scott
__________________
Team Manager
Spartan Vortex Inside, Cyclone Blades, Team Scorpion
Team OMGRCUSA Servos Manager):>
RCBearings.com Tech Rep
dunkonu23 is offline        Reply With Quote
Old 10-02-2011, 11:10 AM   #10
SimStream
Registered Users
 

Join Date: Mar 2011
Location: UK
Default

Metal arms appeared on the 600 pro and are needed because the attached ball link is long and stands away from the arm, so the arm is subject to twisting. They are not needed on a heli where the ball link is standard and can be considered 'bling'
SimStream is offline        Reply With Quote
Old 10-02-2011, 11:03 PM   #11
akamullen
Registered Users
 
Posts: 3,997
 
My HF Map location
Join Date: Feb 2009
Location: Wisconsin
Default

Quote:
Originally Posted by SimStream View Post
Metal arms appeared on the 600 pro and are needed because the attached ball link is long and stands away from the arm, so the arm is subject to twisting. They are not needed on a heli where the ball link is standard and can be considered 'bling'
Exactly, but on 90 size FBL machines they are needed. I have seen the plastics strip in flight on the spline. Although this will most likely only happen during hard 3D flying and only on FBL machines.
__________________
AnythingHeli.com OWNER/ TEAM PILOT
GAUI X5 / X7 *
GOBLIN 500-x2/630/770 * TREX 450DFC@6S * Swinging GAUI/RJX/RAIL & SAB Blades * Microbeast/IKON * Castle ESC's on all * DX18 *
akamullen is offline        Reply With Quote
Old 10-03-2011, 09:30 AM   #12
SimStream
Registered Users
 

Join Date: Mar 2011
Location: UK
Default

Quote:
Originally Posted by akamullen View Post
Exactly, but on 90 size FBL machines they are needed. I have seen the plastics strip in flight on the spline. Although this will most likely only happen during hard 3D flying and only on FBL machines.
True
SimStream is offline        Reply With Quote
Reply




Unregistered
Go Back   HeliFreak > R/C Helicopter Support > 500 Class Electric Helicopters > 500 Pro Class Electric Helicopters


500 Pro Class Electric Helicopters 500 Pro Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.

Thread Tools
Display Modes

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

Forum Jump


Copyright © 2004-2015 by RCGroups.com, LLC except where otherwise indicated. The HeliFreak.com logo is a trademark of RCGroups.com, LLC.