3D Flying! Our 3D flying forum is the ultimate resource for 3D flyers. Also discuss the latest in "4D" flying!

Knife Edge Spin Doctor Needed

Reply
Old 06-23-2012, 09:51 PM
  #1
djmp69
Thread Starter
 
Join Date: Jul 2010
Location: Chitown, IL
Posts: 144
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Knife Edge Spin Doctor Needed

I have two planes, one of which I can't seem to get to KEspin correctly no matter what I try. (I'm sure I haven't tried everything).


With my Edge, Inail it every time, to the point that the plane is literally spinning on the wing axis with the wing pointing straight down, like a pole is going thru wingtip to wingtipnot the slanted knife edge attitude. And that's at idle. If I throttle up, it just gets faster, tighter, and more exciting (no comments from perverts please).

BUT:

With the Funtana, which is balanced a bit tail heavy (purposely, just like the edge), I can only get it in the slanted knife edge attitude. If I add throttle, it goes into an inverted flat spin. I've also tried going right into it, both idle and with some power, same result. The only way I can seem to get it to somewhat KEspin is to just let it fall, no rudder, full aile and Down Elev. Ialso notice I need to keep more left aile in. With the Edge, I can get the stick damn near neutral for the perfect KE spin.

I know different planes fly differently, but to this extreme? Is there something I'm missing, maybe different setup options for the Funtana, or does the Edge just do it better because its a better tumbler? My rudder rates on both planes in high are
relatively the same in both planes, but the Funtana has way more relative throw in the elevators. No Rudd/Elev mix on either bird...

Any ideas?
djmp69 is offline  
Reply With Quote
Old 06-24-2012, 05:19 AM
  #2
zacharyR
 
Join Date: Dec 2008
Location: Tampa, FL
Posts: 649
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Knife Edge Spin Doctor Needed

thrust help's airframes lay out flat in KE spin's

your funtana does it Have SFG's that might give more rudder authority
zacharyR is offline  
Reply With Quote
Old 06-24-2012, 06:07 AM
  #3
BarracudaHockey
Community Moderators
 
BarracudaHockey's Avatar
 
Join Date: Jul 2003
Location: Jacksonville, FL
Posts: 21,459
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Knife Edge Spin Doctor Needed

Rudder authority would be my guess, but as you say, different planes fly differently
BarracudaHockey is offline  
Reply With Quote
Old 06-24-2012, 08:03 AM
  #4
djmp69
Thread Starter
 
Join Date: Jul 2010
Location: Chitown, IL
Posts: 144
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Knife Edge Spin Doctor Needed

Yeah I thought about that, but here's the thingI have plenty of rudder authority. The Funtana will KE all day, and even does KE loops, either from a hover or in motion. The rudder is pretty much just shy of touching the elev halves at full throw. Plus, the SFGs only would help the rudder when the air is moving ACROSS their faces, not AT their faces as in the spin. The Edge does it way better with no SFGs, and not at much rudder. Besides, I'd like to learn to do it without the help of any "cheaters" or learn the proper set up (I have an idea my setup is a bit off).

Good point though, thanx!
djmp69 is offline  
Reply With Quote
Old 07-20-2012, 04:34 AM
  #5
nmking09
 
nmking09's Avatar
 
Join Date: Oct 2004
Location: Niceville , FL
Posts: 562
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Knife Edge Spin Doctor Needed

KE spins = new engine mounts and motor bearings... especially at full throttle. but they do look cool.
nmking09 is offline  
Reply With Quote
Old 07-20-2012, 08:20 AM
  #6
BarracudaHockey
Community Moderators
 
BarracudaHockey's Avatar
 
Join Date: Jul 2003
Location: Jacksonville, FL
Posts: 21,459
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Knife Edge Spin Doctor Needed

You dont need full throttle to do KE spins
BarracudaHockey is offline  
Reply With Quote
Old 07-30-2012, 04:42 AM
  #7
mxcop114
 
Join Date: Jun 2004
Location: Tuckerton, NJ
Posts: 352
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Knife Edge Spin Doctor Needed

Every plane design needs a slightly different input, some will lock in with full elevator/rudder and aileron, most will go flat if you input too much aileron and elevator so the trick is finding the sweet spot, try entering with slightly less than full elevator input. Also, you should have at least 45 degrees of elevator throw to start with, like I said, some require slightly less to maintain it, and same goes for ailerons. There are a few good instructional videos around that explain this.

Lee
mxcop114 is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
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



All times are GMT -8. The time now is 12:15 AM.