Go Back  RCU Forums > RC Airplanes > IMAC
Reload this Page >

world model extra 120

Notices
IMAC Discuss IMAC style aerobatics in here

world model extra 120

Old 05-21-2003, 04:49 PM
  #1  
elkiwi
Member
Thread Starter
My Feedback: (2)
 
Join Date: Jan 2003
Location: Laredo, TX
Posts: 72
Likes: 0
Received 0 Likes on 0 Posts
Default world model extra 120

IŽll made the first flight to my wm extra 300 120, saito 150.

I nead help about cg, throws, and prop recomendation
Old 05-22-2003, 02:29 AM
  #2  
LuvBipes
My Feedback: (4)
 
LuvBipes's Avatar
 
Join Date: Dec 2001
Location: Miami Beach, FL
Posts: 1,241
Likes: 0
Received 1 Like on 1 Post
Default world model extra 120

Had one w/ 100+ flights on it (RIP) powered by an OS 120 III, Great airplane. Basically the Goldberg Extra 300 rendered as an ARF by World Models.

CG and control throws per the manual. One of my all-time favorite arfs. Lands almost like a trainer and has no bad habits. You'll like it.

For a prop, start w/ an APC 16X8, though a 17X6 would work well too.
Old 05-22-2003, 02:48 AM
  #3  
IMK
Member
 
Join Date: Mar 2003
Location: Melb, AUSTRALIA
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default world model extra 120

I've only started flying my WM Extra - 120 and am using the recommended control throws with 35% expo on aileron & elevator and 40% on rudder. I've got the plane balanced at 130mm from the LE.

I'm using a 120 2-stroke with an APC 16x8 and a BCM pitts muffler.

I'm happy with this set-up so far but plan on putting it through a trimming regime provided to me by the local pattern association.

I've been told by others with far more experience on this model than me that the CG can safely go back to 140mm. This combined with a bit of weight saving (e.g. moving the battery back in the fuz by cutting a hatch underneath instead of using lead in the tail, light wheels, light spinner etc) improves the 3-D qualities (although I don't think it was ever intended for this).

I've been given a warning to watch for snapping tendencies with high rate on elevator (which apparently is not a problem if you can reduce the models weight by about 6 ounces).

I'm finding it a great flying model and am impressed with the overall quality.

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.