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

F-16XL ARF by Global Knight Models from Global Jet Club

Notices
RC Jets Discuss RC jets in this forum plus rc turbines and ducted fan power systems

F-16XL ARF by Global Knight Models from Global Jet Club

Old 05-28-2021, 09:06 AM
  #251  
mongo
My Feedback: (14)
 
mongo's Avatar
 
Join Date: Dec 2001
Location: Midland, TX
Posts: 2,940
Received 24 Likes on 21 Posts
Default

i managed to leave out the word, lower, between of and intake in the last post.
just looking for a way to take advantage of the carbon inlet strength.
Old 05-28-2021, 01:37 PM
  #252  
tmgreen64
Junior Member
 
Join Date: Mar 2021
Location: Destin Fl
Posts: 23
Likes: 0
Received 5 Likes on 5 Posts
Default

Gary,
I am working on the main gear, are you happy with the compression on the struts? Did they compress when loaded. I am just adding a little reinforcement. my toe in/out seams fine.
Tgreen
Old 05-28-2021, 04:54 PM
  #253  
Viper1GJ
Thread Starter
My Feedback: (20)
 
Viper1GJ's Avatar
 
Join Date: Oct 2003
Location: Saint George , SC
Posts: 1,925
Received 118 Likes on 95 Posts
Default

Originally Posted by tmgreen64 View Post
Gary,
I am working on the main gear, are you happy with the compression on the struts? Did they compress when loaded. I am just adding a little reinforcement. my toe in/out seams fine.
Tgreen
Yes the main gear struts seem to be working OK. They looked like they would not compress and make the tires vertical but with weight on mine are doing ok.
Old 05-28-2021, 06:10 PM
  #254  
Viper1GJ
Thread Starter
My Feedback: (20)
 
Viper1GJ's Avatar
 
Join Date: Oct 2003
Location: Saint George , SC
Posts: 1,925
Received 118 Likes on 95 Posts
Default

Nice day at FIF today before the winds got high.


First flight of the day and landing was good. The fuel system is working perfectly and I am running an 8 min timer with at least 1.5L remaining. I think my CG may be a little too far aft because the jet seemed a little pitchy and wanted to hunt a little in level flight. The brakes were much better than the first two flights yesterday and worked well.


However, we had an accident when taxing back into the pits that broke the vertical fin. After the two flights yesterday with weak brakes (because of my bad set up) we were paying close attention to make sure they were working today. After landing and before entering the shut down area I did a brake check and the jet slowed. I added some thrust to turn off the runway and my close friend and spotter thought the brakes were not working. He lunged toward the tail to stop the jet from entering the shut down area just as I applied brakes to stop and shutdown. The jet stopped and he could not. He tried to avoid falling over the jet by rolling away and he landed on his back. Fortunately he was not hurt and was able to get up ok. Some how during the fall he bent the vertical fin to the left and it broke just below the dorsal. The damage will be easy to repair as it is only skin and plywood that broke. The hardest part will be finding some matching paint colors. So as far as I know I'm the only pilot at First In Flight Jet rally that has wrecked the same jet twice on the ground. They need to make an award for this achievement.


So as sad, funny, tragic, or goofy as this accident was, it showed a design weakness in the vertical tail area that I will fix during repairs. The dorsal base of the vertical fin has carbon fiber on the inside that extends away from the base about 1" into the top of the fuse section. The airex material broke almost in a straight line along the edge of the carbon fiber.



Internally there are two formers that hold the clamps for the carbon posts in the vertical fin. The rear former plywood broke and separated when the fin was hit. The front former does not extend past the edge of the carbon fiber. My view is that since the the carbon fiber and front former do not extend down into the fuse, there is nothing but the rear former and airex material holding the vertical fin on the jet.


The front former only extends a little into the top of the fuse and does not seem to be bonded to the carbon fiber. It seems to be bonded just to the airex material and has very little structural attachment to the fuse.


In my opinion the front post former should extend deeper into the side of the fuse down to where my finger is and be attached to a band of carbon fiber inside the fuse skin.


The rear former does go around the fuse and tie the rear fin post to the fuse structure properly but I would recommend having a band of carbon fiber around the inside of the fuse to spread vertical fin load into the fuse structure.

I am definitely not suggesting we need to build this thing to be tackling dummy but I am concerned that somebody may try a high speed knife edge pass and possibly snap the vertical fin off. So I suggest al little more structural attention to the vertical fin formers and carbon fiber in the surrounding areas.


Old 05-28-2021, 06:24 PM
  #255  
Viper1GJ
Thread Starter
My Feedback: (20)
 
Viper1GJ's Avatar
 
Join Date: Oct 2003
Location: Saint George , SC
Posts: 1,925
Received 118 Likes on 95 Posts
Default

I want to commend Mario at GLC for outstanding customer service by shipping me a replacement nose gear after the first one fell out and was damaged. Unfortunately it arrived just after the taxi accident happened. I will beef up the nose gear mount and get it installed during the repair process.
Old 05-28-2021, 09:02 PM
  #256  
mongo
My Feedback: (14)
 
mongo's Avatar
 
Join Date: Dec 2001
Location: Midland, TX
Posts: 2,940
Received 24 Likes on 21 Posts
Default

you are finding all the little things the rest of us need to fix, before we fly.

a
BIG THANK YOU

hang in there.
Old 05-29-2021, 06:14 PM
  #257  
Viper1GJ
Thread Starter
My Feedback: (20)
 
Viper1GJ's Avatar
 
Join Date: Oct 2003
Location: Saint George , SC
Posts: 1,925
Received 118 Likes on 95 Posts
Default

First In Flight Top Gun Award




It was completely unexpected but I was just presented the FIF Top Gun Award for flying the F-16XL and working to get it flying again after the nose gear failure. I don't know how they make these choices but it was truly an honor. There were many people who said it really looked great and were looking forward to seeing it fly again. Thank you FIF for the honor!

Old 05-30-2021, 01:22 AM
  #258  
Frank Alvarez
 
Join Date: Mar 2002
Location: Summerville, SC
Posts: 323
Likes: 0
Received 7 Likes on 5 Posts
Default

Hello Gary,

Congratulations!
It is quite the unique aircraft. Not to mention what you've been thru to get it airborne.
When the time comes, we'll shall get both delta jets up in two ship.
Frank
Old 05-31-2021, 07:48 PM
  #259  
jf16crew
 
Join Date: Jan 2018
Posts: 27
Likes: 0
Received 0 Likes on 0 Posts
Default

All,
I know you see all the things gary has done. But mine is only has a 3rd fuel tank. There are things that need to be done before the next batch comes out but mine is about 30 flights in now and it's solid. I see alot of people getting upset and saying it's unsafe or things have to be fixed without actually seeing the airframe in person is silly. This jet flys amazing and really isn't to bad. Im going to continue to fly mine unmodified. The second one I built is modified but I really don't feel that alot of it is required at all
Old 06-01-2021, 04:35 AM
  #260  
tmgreen64
Junior Member
 
Join Date: Mar 2021
Location: Destin Fl
Posts: 23
Likes: 0
Received 5 Likes on 5 Posts
Default

Originally Posted by jf16crew View Post
All,
I know you see all the things gary has done. But mine is only has a 3rd fuel tank. There are things that need to be done before the next batch comes out but mine is about 30 flights in now and it's solid. I see alot of people getting upset and saying it's unsafe or things have to be fixed without actually seeing the airframe in person is silly. This jet flys amazing and really isn't to bad. Im going to continue to fly mine unmodified. The second one I built is modified but I really don't feel that alot of it is required at all

I agree, I have some minor thing I am doing to my XL, but it is just the way I like to do things. I am adding some a little Carbon fiber on the gear plates and the where the wing clamps bolt to the bulkhead. I am in the process of making a third composite tank. This is the time of year I like to boat and fish, and I build slow, but by the end of summer I plan to fly the crap out of that bad boy. The airframe is just fine.
T Green
Old 06-01-2021, 05:05 PM
  #261  
Viper1GJ
Thread Starter
My Feedback: (20)
 
Viper1GJ's Avatar
 
Join Date: Oct 2003
Location: Saint George , SC
Posts: 1,925
Received 118 Likes on 95 Posts
Default

Photos by Jenni Alderman from FIF 2021. Thanks Jenni.


First day take off wreck when nose gear plate came out. You can see the nose gear getting dragged along the pavement inside the main gear well. It looks like the pitot tube and radome saved the nose gear door.


Taxi out the next day with fixed down nose gear. I love the way this jet looks.


F-16XL number 3 for take off.


Lift off


Initial climb attitude


Flying around with the nose leg in a cast!


This is flight 5 after I took the HVAC tape off the nose gear well because it did not stick.


Gear pass


Final turn


Short final


Round out



Flare


Touch down. The jet is very easy to land. Looking forward to flying it again!
Old 06-01-2021, 05:48 PM
  #262  
mongo
My Feedback: (14)
 
mongo's Avatar
 
Join Date: Dec 2001
Location: Midland, TX
Posts: 2,940
Received 24 Likes on 21 Posts
Default

and i looked through all 2640 pix to see those...
Old 06-02-2021, 05:03 PM
  #263  
Viper1GJ
Thread Starter
My Feedback: (20)
 
Viper1GJ's Avatar
 
Join Date: Oct 2003
Location: Saint George , SC
Posts: 1,925
Received 118 Likes on 95 Posts
Default

Touch up paint


I had a chance to make the 45 min drive to the big city down the road and stopped by Home Depot to get some touch up paint for the scratches on the F-16 XL. I took and aileron and the canopy and they took scanner shots and mixed up some light grey, dark grey, and blue. Best I can tell it's pretty close. Good enough for my up coming patch ups anyway.

Old 06-02-2021, 06:16 PM
  #264  
mongo
My Feedback: (14)
 
mongo's Avatar
 
Join Date: Dec 2001
Location: Midland, TX
Posts: 2,940
Received 24 Likes on 21 Posts
Default

yer gona use the behr latex satin

and yeah, i saved the pic with the code info on it..

i need some of the blue.
Old 06-03-2021, 03:42 AM
  #265  
tmgreen64
Junior Member
 
Join Date: Mar 2021
Location: Destin Fl
Posts: 23
Likes: 0
Received 5 Likes on 5 Posts
Default

Rust-oleum ultra 2X Satin Ink Blue is almost a exact match. and the Poppy red, I am going to repaint the tail with poppy red, got the paint at my local ACE hardware
Tgreen

Last edited by tmgreen64; 06-03-2021 at 03:54 AM.
The following users liked this post:
drfred58809 (06-03-2021)
Old 06-03-2021, 02:11 PM
  #266  
Viper1GJ
Thread Starter
My Feedback: (20)
 
Viper1GJ's Avatar
 
Join Date: Oct 2003
Location: Saint George , SC
Posts: 1,925
Received 118 Likes on 95 Posts
Default

Originally Posted by tmgreen64 View Post
Rust-oleum ultra 2X Satin Ink Blue is almost a exact match. and the Poppy red, I am going to repaint the tail with poppy red, got the paint at my local ACE hardware Tgreen
Thanks for the tip, I'll check it out.
Gary
Old 06-09-2021, 06:17 AM
  #267  
tmgreen64
Junior Member
 
Join Date: Mar 2021
Location: Destin Fl
Posts: 23
Likes: 0
Received 5 Likes on 5 Posts
Default

OK, I wanted to give it a try, making my own fuel tank. I started with that white laminate shelving wood, and a piece of plastic from an ceiling light. This is my first attempted to see how much material/fiberglass I should use. If I thought that it was going to come out this good, I would taken more time. That orange stuff is the grandkids modeling clay.
My plan is to make two molds, one being a little bigger than the other. It will be uses as a cap. then the first layer will be Kevlar, if I can source a small amount. Looks like it holds about 1.4 liters. I am using west system with 206 hardener. yesterday the humidity was about 100% so I will need to move my operation inside. and that might be a problem with the wife.





Last edited by tmgreen64; 06-09-2021 at 06:39 AM.
The following users liked this post:
Viper1GJ (06-09-2021)

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 - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.