The For / Aft Bobble (again) cause  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Helicopters >> Electric RC Helis >> Helimax >> The For / Aft Bobble (again) cause
Page: [1]

Login
Message << Older Topic   Newer Topic >>
The For / Aft Bobble (again) cause - 9/22/2007 4:36:24 AM   
dtacmed


 

Posts: 65
Joined: 8/5/2007
From: Kannapolis, NC, USA
Status: offline 		I'm starting to think my main pain in the butt with RC Helis's and the MX-Pro is the fore / aft bobble. I thought I'd share the latest find in causes for this problem. I added some new CNC parts yesterday and went ahead and put on a new set of stock Heli-Max blades. I check CG and balanced the them. Went out to fly and the #+%#! fore aft bobble had returned. To make a long story short after a day and a half of tracing the problem down it turned out to be the new blades. Even though they were balanced and had an equal CG. Put on a old set and the bobble was gone. Anyone else ever had this happen ?
       Post #: 1

RE: The For / Aft Bobble (again) cause - 9/22/2007 4:57:43 AM   
osterizer


 

Posts: 1566
Joined: 3/10/2007
From: Sykesville, MD, USA
Status: offline 		I didn't actually fly the OEM blades long enough to get a bobble-- they wouldn't track so I took them off. The MX helis have a couple of undipped foot parts, and one of them is the HMX blades. In short, none of them that I've tried were any good, so I gave away the ones I had in hopes that someone else would have better luck.

If you want an absolutely lovely flying heli, get some tapered MAH 315s-- these are the smoothest flying blades you'll find for a 450 heli. They're a little expensive, but once you've seen them fly.... Check helihobby, grandrc, or MRC's web site (they're the importers). If you want sharper collective, lower price, but with a compromise in smooth control, the Align 315 Pro fiber blades work well on mine, and for aerobatics, the 320mm SAB composites (helihobby) are balanced for control response and track almost as tightly as the MAH.

[edit] added pictures of the MAH and SAB setups. [/edit]


Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


< Message edited by osterizer -- 9/22/2007 5:02:44 AM >

(in reply to dtacmed)
       Post #: 2

RE: The For / Aft Bobble (again) cause - 9/23/2007 7:52:25 PM   
jmacg8r


 

Posts: 101
Joined: 10/30/2006
From: Jacksonville, FL, USA
Status: offline 		Check your servos...sounds like a loose servo in the frame to me.

(in reply to dtacmed)
       Post #: 3

RE: The For / Aft Bobble (again) cause - 9/24/2007 12:19:18 AM   
AirmanBob



Posts: 383
Joined: 6/14/2004
From: Emmett, ID, USA
Status: offline 		It sorta sounds like the blade grips are too tight.
Blades can't track right if the grips are overly
tight.

JMO

AB

(in reply to jmacg8r)
       Post #: 4

Page:   [1]
All Forums >> RC Helicopters >> Electric RC Helis >> Helimax >> The For / Aft Bobble (again) cause
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.297RCU3