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Fly Eagle F-16 1:4.6 Advance, wow

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Old 12-14-2013, 05:42 PM
  #326
mungrelv8ute
 
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Hi Ali

Can you share your settings please?

Thanks, Gregg
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Old 12-18-2013, 04:31 PM
  #327
David Jackson
 
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r
Quote:
Originally Posted by David Jackson View Post
What is the best center-of-gravity location for the 1/4.6 scale fej F-16? Also, how much movement for the ailerons and elevator?
FEJ emailed the following info 12/18/2013

Center-of-gravity. 25.5 cm (26cm should be better) from leading edge
elevator 70 mm up 70 mm down
flap 40 mm
aileron 15-20 mm (25 mm if you want)

Would like to know settings used by anyone currently flying this plane. Also would greatly appreciate any photos showing mods made to control surface linkages, such as external horns for elevators, etc.

Last edited by David Jackson; 12-18-2013 at 05:52 PM.
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Old 12-18-2013, 04:41 PM
  #328
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26cm measured from where?
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Old 12-19-2013, 02:54 PM
  #329
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On the F16 this infact makes a difference as the airfoil contiues further on the fuselage than on the wing itself.
Was and is the same on Avonds, heard the same about JetLegend, but a Facon this big makes the risk minimal.
I will go for a measure on the extreme inner LE tip of the wing chord. For me it sounds weird to meaure this on the fuselage.
The factor in any size just makes it more nose heavy than if this measure is taken on the fuse... Thruth is that all CG locations from factory on F16 are far from optimal....

Last edited by Falcon 64; 12-19-2013 at 03:13 PM. Reason: add
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Old 12-19-2013, 03:17 PM
  #330
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i hope to have my CG just in front of the main wheels but i still dont know where is located from factory
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Old 12-19-2013, 03:26 PM
  #331
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Meaning you are safe anyhow. And on most high AOA jets, the CG has a wider span than on a Hawk for instance.
You will "never" get the optimal CG from the factory, because that is a safe advice.
To achieve this, we need the user-end...
How close are you?
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Old 12-19-2013, 03:34 PM
  #332
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how close to what?
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Old 12-19-2013, 04:32 PM
  #333
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Quote:
Originally Posted by David Jackson View Post
r

FEJ emailed the following info 12/18/2013

Center-of-gravity. 25.5 cm (26cm should be better) from leading edge
elevator 70 mm up 70 mm down
flap 40 mm
aileron 15-20 mm (25 mm if you want)

Would like to know settings used by anyone currently flying this plane. Also would greatly appreciate any photos showing mods made to control surface linkages, such as external horns for elevators, etc.
26 cm sounds weird..on my 1:6 scale i aim for 23,5 as a start..
Must calculate on it tomorrow.
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Old 12-19-2013, 05:19 PM
  #334
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Maybe Ali, or Nir will post the CG and control settings they are using on the F-16.
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Old 12-19-2013, 09:30 PM
  #335
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My prediction for optimal CG is at 36.16% of the chord, which means it`s at 28,9 cm from LE, minus 1 cm in lack of washout (which it should have) = 27,9 cm . And that 26 cm is a very safe setting. Perhaps we`ll see if we get a reply..

Last edited by Falcon 64; 12-20-2013 at 12:25 AM. Reason: washout
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Old 12-20-2013, 03:47 PM
  #336
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heres the CG drawn on my wing.

I think im stupid and brave enough to try the 32cm CG

this bird is HARD to balance without lead....
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Old 12-20-2013, 08:58 PM
  #337
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Ditto stupid..
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Old 12-21-2013, 12:26 AM
  #338
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Sorry, but I do not measure my control throws or centre of gravity as I believe both are very much down to individual preference. I don't get it when people say that the centre of gravity has to be X or the ail deflection has to be Y Or this set up won't work.. It BS ! The best set up is what works best for you, the flyer. Not the club hot shot. Not the Internet Guru!
Start at the factory settings and experiment. A plane such as the F16 has a huge centre of gravity range where it will remain perfectly flyable. I think I moved a total of some 3 " forward and back. All I found was that just changed the feel of the pitch response. I had no lead in my 16 when I sold it. Some will like a plane that requires little to no forward stick when inverted ( You can get this F-16 like that as I did it, and hated it ) Others will be looking for a healthy amount of forward pitch.. Its all down to you. Just be aware that the rearward centre of gravity does make for a pitch sensitive model and this shows on the round out and flare. It is easier to over flare and end up ballooning on landing.
Control throws.
I found it soft in roll and pretty positive in pitch. My preferred method is to set a 3 position dual rate. Max the control surface deflections ( without stalling ) by matching the control movement to the stick movement, so at 100% ATV's I try and work it so that for every bit of stick movement the control surface moves. What I always try and avoid is the control surface reaching the ends of its mechanical movement and there still being stick movement on the radio left to go. This is poor, as you will either stress a servo out, or have to lower the ATV. Which is far from ideal. I go to the servo and move it in on the horn, or out on the control surface, whichever is best for a better geometry.
I then set my deal rates on rudder, elv and ail. 100%, 75% and 50%. Take off on mid rate and play with all three ( One at a time to get the feel I like ) On this F-16 it was.. HIgh rate aileron. Mid rate Elv and min rate rudder.
Hope this helps? Sorry for the slow response. I have less and less inclination to come on this site at the moment. Between all the regular BS that floats around, it just seems to be a groundhog day of the same posts, and threads. Then when some of the internet experts start hounding me for my actions and suggesting that my business should suffer because of it……. Nah ! I have better places to be, and better use of my time.
Regards Al
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Old 12-21-2013, 04:04 AM
  #339
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Quote:
Originally Posted by Ali View Post
Sorry, but I do not measure my control throws or centre of gravity as I believe both are very much down to individual preference. I don't get it when people say that the centre of gravity has to be X or the ail deflection has to be Y Or this set up won't work.. It BS ! The best set up is what works best for you, the flyer. Not the club hot shot. Not the Internet Guru!
Start at the factory settings and experiment. A plane such as the F16 has a huge centre of gravity range where it will remain perfectly flyable. I think I moved a total of some 3 " forward and back. All I found was that just changed the feel of the pitch response. I had no lead in my 16 when I sold it. Some will like a plane that requires little to no forward stick when inverted ( You can get this F-16 like that as I did it, and hated it ) Others will be looking for a healthy amount of forward pitch.. Its all down to you. Just be aware that the rearward centre of gravity does make for a pitch sensitive model and this shows on the round out and flare. It is easier to over flare and end up ballooning on landing.
Control throws.
I found it soft in roll and pretty positive in pitch. My preferred method is to set a 3 position dual rate. Max the control surface deflections ( without stalling ) by matching the control movement to the stick movement, so at 100% ATV's I try and work it so that for every bit of stick movement the control surface moves. What I always try and avoid is the control surface reaching the ends of its mechanical movement and there still being stick movement on the radio left to go. This is poor, as you will either stress a servo out, or have to lower the ATV. Which is far from ideal. I go to the servo and move it in on the horn, or out on the control surface, whichever is best for a better geometry.
I then set my deal rates on rudder, elv and ail. 100%, 75% and 50%. Take off on mid rate and play with all three ( One at a time to get the feel I like ) On this F-16 it was.. HIgh rate aileron. Mid rate Elv and min rate rudder.
Hope this helps? Sorry for the slow response. I have less and less inclination to come on this site at the moment. Between all the regular BS that floats around, it just seems to be a groundhog day of the same posts, and threads. Then when some of the internet experts start hounding me for my actions and suggesting that my business should suffer because of it……. Nah ! I have better places to be, and better use of my time.
Regards Al
thx..

about RCU, yeah its a bad tendency
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Old 12-21-2013, 07:06 AM
  #340
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Ali,
Thanks for the information.
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Old 12-15-2014, 05:02 AM
  #341
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Hi All,

I have recently got myself the F16 from FEJ 1/4.6 scale. It came with no instructions. I need little HELPPPPPP!! here with this. I need to know how to install the drag chute system and where do I buy or how do I make the chute. Also I have seen the great job Al has done on this F16 and so the others. Great job guys.

I also need help in making the afterburner ring.

Are the JR8911 good servos for this Jet.

Thanks guys.
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Old 12-15-2014, 10:44 AM
  #342
DiscoWings
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Spark_w

You will get bombarded with posts on why you bought the FEJ,,, be prepared. Best way to get advise is to Pm threads, any thread with FEJ anything is basically a target these days.

Good luck, I have had luck with FEJ with the correct mods.
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Old 12-25-2014, 05:48 AM
  #343
Falcon 64
 
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Nightmare from Norway :-D.
Will be happy to share my mods on mine, so you can enjoy this magnificent plane.

Hearing Flyeagle finally have kneeled, probably the best news many of you have heared for a loong time :-)
Says more about the beholder than product, but that is a faaar other subject :-D (!!)

Anyway Spark, get ready for a joy-ride, you are lucky to have this almost perfect "replica" of the fullsize, it`s better than the 1:5 from Skymaster.
Not many sold, but you are lucky to have one.
Contact me on PM, and we`ll take it from there.
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Old 12-25-2014, 07:59 PM
  #344
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Better than a Skymaster 1/5th.....LOL.....easy on the Egg Nogg.
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Old 01-01-2015, 04:13 AM
  #345
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Hi all,

Just started working on my F16. Here are some pics.


Today I am working on the Light system and the fuel system. Also I did some custom scale painting on the airframe. I will post those pics soon.
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Old 01-16-2015, 11:06 PM
  #346
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Spark, been trying to reach you for a long time now, pm to you doesn't work...
Try my email gudmundmalones@gmail.com
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Old 02-14-2016, 10:44 PM
  #347
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Is anyone still flying this model? Curious to know what if any mods were made, and the number of flights.

If you have any info to share, send me PM.
Thanks

Last edited by David Jackson; 02-16-2016 at 10:15 AM.
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