Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Blade Helicopters (eFlite) > Blade 400


Blade 400 Blade Helicopters (eFlite) 400 Helicopters


Reply
 
Thread Tools Display Modes
Old 09-25-2009, 03:08 PM   #1
JMP
Registered Users
 
My HF Map location
Join Date: Jun 2008
Location: Arlington, Texas
Default Collective Change = Tail Wag

Another peculiar situation. I have a B400 with JR DS287s on cyclic and a DS287MG on the tail. Currently, the bird has the original G110 gyro installed.

When I add collective in normal mode, I get a severe tail wag to the right. When I reduce collective in normal mode, I get a severe tail wag to the left. In Idle-Up, I get no tail wag. I have replaced the G110 with another G110. No change. I even put the original E-Flite servo back on the tail. No change. The tail holds pretty well in normal mode if I don't increase or decrease the collective.

At one time I had a Futaba GY401 gyro on the heli. Although it worked pretty well, it caused my stock ESC to burn up. I don't have a BEC on the heli. I removed the 401 and put it on a recently acquired T-Rex 450 SE V2 and the gyro works fairly well. I replaced the B400 ESC with another stock E-Flite ESC and put one of the G110s back on. I think the severe tail way started happening sometime after that. Not sure when.

My question: Could the tail wag be due to a faulty E-Flite ESC?

Thanks in advance for your assistance.

Jerry
__________________
T-Rex 500, T-Rex 450 SE V2, T-Rex 250
Blade 400, Blade mCPx
JMP is offline        Reply With Quote
Old 09-25-2009, 04:38 PM   #2
Wolfpackin
HF Support
 
Posts: 11,038
 
My HF Map location
Join Date: Nov 2007
Location: Eagle, CO
Default

In Normal mode your headspeed is changing more than it does in Idle up, that's why your tail is kicking out. Wag is when the tail continuosly oscillates back and forth.

If you change you Normal mode curve to more closely match the Idle-up curve you won't have the severe headspeed changes that often cause some gyro's problems.

Also, the G110 is not a very good gyro and the DS285 is not a good tail servo.

Try a Normal curve of 0-60-80-90-100 and an Idle-up curve of at least 100-90-80-90-100.

Or, just fly in Idle-up since it works OK for you.

FWIW, I just use Normal for spool up only, then switch to Idle up for flying.
__________________
Jonathan Livingston Helicopter
Blade 400: E-flite 420H/35X ESC, AR6100e, HS65HB x 3, G401B/DS290G. (Ret.)
CopterX 450AE V2: 430XL/35X ESC, AR6100, HS65HB x 3, LTG2100T/HSG-5084MG.
T-Rex 550E V1 Classic Flybar: 600MX/BL70G, AR6200, DS610 x 3, Quark/DS650, 16t/520mm blades.
Wolfpackin is offline        Reply With Quote
Old 09-25-2009, 04:55 PM   #3
Cailid
Registered Users
 
Posts: 7,514
 

Join Date: Feb 2009
Location: Abbotsford B.C.
Default

Quote:
Originally Posted by Wolfpackin View Post
Also, the G110 is not a very good gyro and the DS285 is not a good tail servo.
He's using the 287, not the 285 for tail. It should be good for the tail.

Torque:13 oz/in @ 4.8V; 16 oz/in @ 6V
Speed:.08 sec/60 @ 4.8V; .07 sec/60 @ 6V
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
"Any man who can drive safely while kissing a pretty girl is simply not giving the kiss the attention it deserves" - Albert Einstein
Cailid is offline        Reply With Quote
Old 09-25-2009, 05:30 PM   #4
Wolfpackin
HF Support
 
Posts: 11,038
 
My HF Map location
Join Date: Nov 2007
Location: Eagle, CO
Default

Still, not a great tail servo.

...And the rest of my post still applies.
__________________
Jonathan Livingston Helicopter
Blade 400: E-flite 420H/35X ESC, AR6100e, HS65HB x 3, G401B/DS290G. (Ret.)
CopterX 450AE V2: 430XL/35X ESC, AR6100, HS65HB x 3, LTG2100T/HSG-5084MG.
T-Rex 550E V1 Classic Flybar: 600MX/BL70G, AR6200, DS610 x 3, Quark/DS650, 16t/520mm blades.
Wolfpackin is offline        Reply With Quote
Old 09-25-2009, 05:31 PM   #5
1BADAIR
Registered Users
 
Posts: 3,540
 
My HF Map location
Join Date: Jun 2008
Location: Oxford, Mi
Default

head speed FTW
__________________
Compass 7HVU HBL980/950 Ar7200bx Edge160-- Compass 6HV, 610/650
TRex 700LE , Beastx 610/650, Warp360 TracX 92A+
1BADAIR is offline        Reply With Quote
Old 09-25-2009, 06:48 PM   #6
JMP
Registered Users
Thread Starter Thread Starter
 
My HF Map location
Join Date: Jun 2008
Location: Arlington, Texas
Default

Appreciate your comments. I'll change the curve and see if that makes any difference. Also, I'll just use Normal for Spoolup, then switch to Idle-up .

Thanks again, Jerry
__________________
T-Rex 500, T-Rex 450 SE V2, T-Rex 250
Blade 400, Blade mCPx
JMP is offline        Reply With Quote
Old 09-25-2009, 07:42 PM   #7
1BADAIR
Registered Users
 
Posts: 3,540
 
My HF Map location
Join Date: Jun 2008
Location: Oxford, Mi
Default

don't even have to do that.
as long as the throttle is 0 for 15 seconds the soft start will take care of it.
__________________
Compass 7HVU HBL980/950 Ar7200bx Edge160-- Compass 6HV, 610/650
TRex 700LE , Beastx 610/650, Warp360 TracX 92A+
1BADAIR is offline        Reply With Quote
Reply

Tags
esc




Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Blade Helicopters (eFlite) > Blade 400


Blade 400 Blade Helicopters (eFlite) 400 Helicopters

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 © 2004-2011 - William James - Helifreak.com