Notices
RC Warbirds and Warplanes Discuss rc warbirds and warplanes in this forum.

TF FW190 GIANT ARF

Reply

Old 11-01-2019, 11:09 AM
  #4651  
Lifer
My Feedback: (1)
 
Lifer's Avatar
 
Join Date: Aug 2008
Location: Kansas City, MO
Posts: 4,267
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

1/8th to 3/16ths spacers behind the rear of the mounting plates.
Lifer is offline  
Reply With Quote
Old 11-01-2019, 03:31 PM
  #4652  
Chris Nicastro
 
Chris Nicastro's Avatar
 
Join Date: Oct 2005
Location: Coeur d'Alene, ID
Posts: 2,802
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

When you look at the top of the wing, gear down, tail on the ground (then tail raised level) you will notice where the axle is relative to the leading edge of the wing. The best position for the axle is to be well forward of the LE when the tail in down and at least even with the LE when the tail is up. This keeps the mass of the plane behind the axle as much as possible to help make it stable. As the axle position moves back the condition gets worse and all the typical problems get worse, nosing over, erratic veering, etc.
Look from the top the side views to get measurements and impressions on what's going on.
Adding a spacer to the back edge of the retract works but pay attention to the retracted position of the wheel too. The struts are like a foot long so a small washer under each screw is a good start then add two and see how it goes.

I usually set the gear/wheel at least parallel to the center line of the plane and then see how much deflection or twist there is in the strut. If the strut it tight then I add more toe out. If the strut is loose then I leave it because the torque of the wheel on the axle and lower leg will be enough of a toe out angle. You're looking at the scissor link for this info.

Also, it should be considered to replace the springs in the Robostruts with softer springs or a dual rate spring. They are made with very stiff springs! Its better to have a dual stage set up common on Yellow AC retracts. Ive made this mod to my planes many times and its so much better than stock.
Chris Nicastro is offline  
Reply With Quote
Old 11-01-2019, 04:41 PM
  #4653  
ROGER RUSSELL
My Feedback: (12)
 
ROGER RUSSELL's Avatar
 
Join Date: Dec 2001
Location: Jacksonville, IL
Posts: 1,333
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Will take all suggestions into consideration

I appreciate all that has replied

Hopefully we have a few flying days left this year in the Midwest

again Thanks and I will try to report back on my results

Roger
ROGER RUSSELL is offline  
Reply With Quote
Old 11-02-2019, 05:13 PM
  #4654  
Chris Nicastro
 
Chris Nicastro's Avatar
 
Join Date: Oct 2005
Location: Coeur d'Alene, ID
Posts: 2,802
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Thumbs up

Roger, Roger!

Chris Nicastro is offline  
Reply With Quote
Old 11-02-2019, 07:39 PM
  #4655  
ROGER RUSSELL
My Feedback: (12)
 
ROGER RUSSELL's Avatar
 
Join Date: Dec 2001
Location: Jacksonville, IL
Posts: 1,333
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Originally Posted by chris nicastro View Post
roger, roger!

what, what
ROGER RUSSELL is offline  
Reply With Quote
Old 11-04-2019, 06:19 AM
  #4656  
paladin
My Feedback: (9)
 
Join Date: Feb 2002
Location: Vestal, NY
Posts: 2,875
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Originally Posted by Chris Nicastro View Post
When you look at the top of the wing, gear down, tail on the ground (then tail raised level) you will notice where the axle is relative to the leading edge of the wing. The best position for the axle is to be well forward of the LE when the tail in down and at least even with the LE when the tail is up. This keeps the mass of the plane behind the axle as much as possible to help make it stable. As the axle position moves back the condition gets worse and all the typical problems get worse, nosing over, erratic veering, etc.
Look from the top the side views to get measurements and impressions on what's going on.
Adding a spacer to the back edge of the retract works but pay attention to the retracted position of the wheel too. The struts are like a foot long so a small washer under each screw is a good start then add two and see how it goes.

I usually set the gear/wheel at least parallel to the center line of the plane and then see how much deflection or twist there is in the strut. If the strut it tight then I add more toe out. If the strut is loose then I leave it because the torque of the wheel on the axle and lower leg will be enough of a toe out angle. You're looking at the scissor link for this info.

Also, it should be considered to replace the springs in the Robostruts with softer springs or a dual rate spring. They are made with very stiff springs! Its better to have a dual stage set up common on Yellow AC retracts. Ive made this mod to my planes many times and its so much better than stock.
+1

an easy test for the spring in the strut is with the plane sitting on it gear lift a wing tip a foot to 18in quickly (of coarse the tail wheel has to be in the air), while some one watches the strut on the ground for movement it should telescope in a bit with the movement. the strut should be sprung to the wt of the plane (2x the wt it, one strut, has to lift). but as a general rule if you bounce a landing you landed to slow, the springs are not dampened like on the man carrying planes so the wing has to be flying to dampen the springs. stall it on like in a 3 point landing can get ugly if it drops any distance to the runway..

Joe
paladin is online now  
Reply With Quote
Old 11-04-2019, 06:52 AM
  #4657  
ROGER RUSSELL
My Feedback: (12)
 
ROGER RUSSELL's Avatar
 
Join Date: Dec 2001
Location: Jacksonville, IL
Posts: 1,333
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default




I put two washers and reset the gear to straight ahead according to the Manuel Will see when weather permits
ROGER RUSSELL is offline  
Reply With Quote
Old 11-04-2019, 02:01 PM
  #4658  
ROGER RUSSELL
My Feedback: (12)
 
ROGER RUSSELL's Avatar
 
Join Date: Dec 2001
Location: Jacksonville, IL
Posts: 1,333
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default


Here

ROGER RUSSELL is offline  
Reply With Quote
Old 11-04-2019, 02:02 PM
  #4659  
ROGER RUSSELL
My Feedback: (12)
 
ROGER RUSSELL's Avatar
 
Join Date: Dec 2001
Location: Jacksonville, IL
Posts: 1,333
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Above is the way the 190 sits with the two washers under back of mounts

THOUGHTS

Did seem to taxi better

ROGER RUSSELL is offline  
Reply With Quote
Old 11-05-2019, 05:01 PM
  #4660  
Chris Nicastro
 
Chris Nicastro's Avatar
 
Join Date: Oct 2005
Location: Coeur d'Alene, ID
Posts: 2,802
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Yes, compared to scale drawings of the full scale plane the wheels are pretty much in the right location. Don't go any further forward.
Taxiing was improved because you increased the wheelbase between the tail wheel and main wheels. Now the plane will be more stable and have better feedback. Try it out and see what you think!
Chris Nicastro is offline  
Reply With Quote
Old 11-05-2019, 05:37 PM
  #4661  
ROGER RUSSELL
My Feedback: (12)
 
ROGER RUSSELL's Avatar
 
Join Date: Dec 2001
Location: Jacksonville, IL
Posts: 1,333
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Yes flew it today even in some crosswind and very manageable

Thanks for all the feedback

Roger
ROGER RUSSELL is offline  
Reply With Quote
Old 11-06-2019, 06:19 AM
  #4662  
paladin
My Feedback: (9)
 
Join Date: Feb 2002
Location: Vestal, NY
Posts: 2,875
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

i'm glade you are having fun now!

Joe
paladin is online now  
Reply With Quote
Old 11-06-2019, 08:50 AM
  #4663  
ROGER RUSSELL
My Feedback: (12)
 
ROGER RUSSELL's Avatar
 
Join Date: Dec 2001
Location: Jacksonville, IL
Posts: 1,333
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Thanks Joe

after going through all of this I VAGUELY REMBER my old one may have had washers under the gear, hence why I never fad that problem with it

All good and ready for some better days

Thanks to all the gave suggestions
ROGER RUSSELL is offline  
Reply With Quote

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