Tail Questions? Opinions please...... - HeliFreak
Fun, Learning, Friendship and Mutual Respect START  HERE

Go Back   HeliFreak > R/C Helicopter Support > 450 Class Electric Helicopters

450 Class Electric Helicopters 450 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.

Thread Tools Display Modes
Old 04-29-2007, 08:22 PM   #1
Rick Rotorhead
Registered Users
Posts: 2,897

Join Date: May 2006
Location: Ludgershall, Wiltshire, England
Default Tail Questions? Opinions please......

Hi guys, this problem I got with the tail blowing out during pitch up. Well I notice there is a fair bit of slop in the plastic yoke where it fits around the spigots on the pitch slider. It allows several degrees of tail blade pitch change with no movement at the tail push rod! It was like this from new. Should there be any slop here - could that be losing me tail pitch and hence tail authority. I could maybe put some thin walled plastic tube over the spigots to help them have a tighter fit in the yoke - what do you think?

One other thing - I'm using a smaller distance from the servo centre screw to the ball, about 6mm, what would happen if I used a long servo arm (say 11mm) would it help at all?
450SE Silver - Power: Neu1107-2Y + 10t pinion ESC: Jazz 40-6-18 Governed. - Batts: 4s, FP 2100 Evolites. Pitch +/- 12* (TC63 PC 0,25,50,75,100), cyclic 6* HS2900
HS65Mg x3 + GY401 + S9650 tail.... Rx: AR6200 - Tx: FF9Super(T9CP) +Spektrum Module
Crash count = 13 for 179. Trex time aloft = 22:42
Rick Rotorhead is offline        Reply With Quote
Old 04-29-2007, 09:34 PM   #2
Registered Users
Posts: 621
My HF Map location
Join Date: Aug 2006
Location: Dacula, GA

Hey Rick,
I too thought I had a tail problem, until I really slowed down my movements to realize it was me adding rudder in hard collective moves. I would push up on the stick in flips or rolls etc. and I was adding rudder. Just a thought.
T-REX 600n Pro, O.S. 55, Outrage 56
AMA #900910
jpolidore is offline        Reply With Quote
Old 04-30-2007, 04:31 AM   #3
Registered Users

Join Date: Oct 2005
Location: UK, Stratford Upon Avon

You can rule out dumb thumbs by adding a little expo on rudder. Some folks use it all the time... I've tried and it does not suit me as I learned to fly without it but it does help prevent unwanted rudder input when you pop the throttle.

If the tail is kicking out then you need more gain. I assume that you went thru the set-up of the tail from scratch once you had re-positioned the position of the connector on the servo horn?

You absolutely do not need (or want) a longer servo arm... in fact with 11mm I suspect you'd struggle to get the Limit on the 401 low enough to prevent binding. Limit on the 401 wants to be in the 80 - 100 range - find (or drill) a hole in the servo horn that gives you that limit with absolutely complete throw on the tail slider.

If you have that set up then check for binding.
If you're using the pushrod guide (under the tail fin) then make sure it is LOOSE - they tend to be WAY too tight a fit, I don't use them.

Yes the plastic yokes have some slop... does not cause problems for most 'normal' flying.
ukgroucho is offline        Reply With Quote

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 © 2004-2016 by RCGroups.com, LLC except where otherwise indicated. The HeliFreak.com logo is a trademark of RCGroups.com, LLC.