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CJM F-4D Conversion and Build

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CJM F-4D Conversion and Build

Old 01-02-2012, 07:43 PM
  #51  
USSCAT
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Default RE: CJM F-4D Conversion and Build

Hi Ronnie,

Oh that is right, I remember that now, you came up with a cool way of fitting things up front, I will have to try something similar to keep some weight up front.

Is the JL stab a one piece assembly or is it built up? in another words, how are the two stabs attached?

Best Regards,
Mike
Old 01-05-2012, 04:06 AM
  #52  
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Default RE: CJM F-4D Conversion and Build

Mike,

The stab is one piece with a cross joiner between the two halves. Have a look at Post #32, photo #3 top column in this thread by 757driver.

http://www.rcuniverse.com/forum/m_10...mpage_2/tm.htm
Old 01-08-2012, 07:13 PM
  #53  
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Default RE: CJM F-4D Conversion and Build

Working on the belly a bit, remember this is the DF Kit with once piece wing that I am modifying for turbine and plug in wings. The belly pan is designed to be attached to the one piece wing. I have built up the wing box and now fitting the belly pan in place. I will have to do a lot of patch works later to get everything in tight. I will have to build the engine brackets later to fit my JC Rhino. The cool thing about CJM kits is that they pay attention to details, as you can see the belly pan is set up for two Sparrow Missiles, two more fits under the fuse up front.
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Old 01-08-2012, 07:24 PM
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Default RE: CJM F-4D Conversion and Build

I was so concerned about the way the diverters were fitting, I used a plug that I had a made a while ago to check the fit, and it looks pretty good. I know the plug does not look right, so rather than fooling with it, I thought about making another one so the past few days, I have been working on one. Lots of sanding and and fitting, the first picture is the old one and the rest are the way I am hoping to make the plug. I may pull a canopy off the plug, we will see how it works out, but most probably I will end up ordering one, I like to get the one with operational canopy.


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Old 01-21-2012, 02:17 PM
  #55  
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Default RE: CJM F-4D Conversion and Build

Ok, I have been away for while, I got invited to be at the WGS Satellite Launch for the Airforce at the Cape this past week. The Launch was on Thursday night and I tell you it was a sight that I will never forget. I have a few photos here and have a video of the Launch that once I can get it on the PC I may upload it. I have worked for multiple defense contractors for the past 25 years and have never been so excited and scared at the same time

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Old 01-25-2012, 05:28 PM
  #56  
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Default RE: CJM F-4D Conversion and Build

I have been working on the engine hatch and after some sanding I go the hatch to fit, there are some gaps at the edges of the hatch. So I used John Redman's method to line up the hatch and then drilled four 1/8 hole on the inside lip of hatch and the mating fuse section to keep the hatch in place while I deal with the gap issue.
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Old 01-25-2012, 05:34 PM
  #57  
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Default RE: CJM F-4D Conversion and Build

To keep the engine hatch sides in place I am adding a few 1/8 dowel pins to the hatch where it fits inside a bushing that is attached to the Fuse. The excess was cut and sanded.
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Old 03-08-2012, 07:29 PM
  #58  
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Default RE: CJM F-4D Conversion and Build

Being that I am converting from DF to Turbine, the plastic Exhaust needs to be replaced, so I made a mold and made three in case I mess one up.

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Old 03-08-2012, 07:36 PM
  #59  
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Default RE: CJM F-4D Conversion and Build

The kit did not include a canopy frame (lost??), I will try to make one here is a few photos of the plug that I am making.
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Old 10-20-2012, 06:22 PM
  #60  
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Default RE: CJM F-4D Conversion and Build

It has been a while since last post. I have been working on and off, and have made some head way. I made a canopy plug and a mold. I pulled two canopies, one will be set up to open and close and one will be standard.
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Old 10-21-2012, 09:15 AM
  #61  
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Default RE: CJM F-4D Conversion and Build

I was planning to modify the stab mechanism to be similar to JL setup. The problem I ran in to was that the chute could no longer be installed due to limited spacing. So I opted to use the CJM mechanism but I could not find the ones that I had. I knew that it had to be upgraded for the turbine conversion. I made mine based on some photos that I had from the guy that I bought the kit from.
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Old 01-02-2013, 06:41 PM
  #62  
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Default RE: CJM F-4D Conversion and Build

I fitted the stab hardware in and checked for fits before installing in the stab. Also fit checked the parachute mechanism.
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Old 01-02-2013, 06:43 PM
  #63  
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Default RE: CJM F-4D Conversion and Build

Next the stab hardware was installed in to stab with Gorilla Glue and balanced.
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Old 01-02-2013, 06:49 PM
  #64  
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Default RE: CJM F-4D Conversion and Build

Here is a few pictures of the stab and rudder servo setup.I also used John Redmann's BVM F-4 build to replicate the vent channels in front of the vertical stabilizer.
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Old 01-02-2013, 06:56 PM
  #65  
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Default RE: CJM F-4D Conversion and Build

Ok, I was tired of looking at the yellow fuse, so there goes the gray and white primers.
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Old 01-02-2013, 06:58 PM
  #66  
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Default RE: CJM F-4D Conversion and Build

I cut the canopy frame and used a scrap canopy for fit check, looks pretty good to me....
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Old 04-28-2013, 04:27 PM
  #67  
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Default RE: CJM F-4D Conversion and Build



It is beena while since my last post, I have been working on the F-4 on and off. I have made a few fuel tanks and aluminum hadware.

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Old 04-28-2013, 04:34 PM
  #68  
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Default RE: CJM F-4D Conversion and Build

If you recall this was the DF version with a single wing which i have converted to plug in wings. The center wing skin is now attached to the fuse. I have also attached the intakes.
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Old 04-28-2013, 04:37 PM
  #69  
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Default RE: CJM F-4D Conversion and Build

I am now working on glassing the stab and rudder.
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Old 04-28-2013, 11:35 PM
  #70  
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Default RE: CJM F-4D Conversion and Build

Mike,

Looking good, keep it up.

Just an observation from my side. You have a piece of solid material that needs to be removed for scale appearance reference middle picture on post #68.

Mario
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Old 05-04-2013, 08:58 AM
  #71  
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Default RE: CJM F-4D Conversion and Build

Hi Mario,

I have been debating to remove that solid area or leave it and cut and shape the missile to fit over it. I believe the original design used that area to secure the wing bolt in to the fuse. More than likely, I will be cutting it out. Thanks for pointing it out.
Old 05-06-2013, 11:43 PM
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Default RE: CJM F-4D Conversion and Build


Hoping no one minds if I drop in on this build thread, but I'm also working on a (pre-owned) CJM F-4 that I picked up last year. It is really nicely painted in the Bicentennial livery. I am in Australia, but I think this jet had its birth in the US. Bruce Saunders from CJM thinks its possibly the one built by a chap called William Donner. I have no idea how old it is except its the one piece wing and I'm told was first built as a DF jet.

I'm going to put a 36 lb turbine in it. I have the stainless bifurcated pipe, servos, landing gear, brakes, UP3 sequencer, etc basically ready to install or re-install. Everything came out and has been checked and fixed and is waiting to go back in, but with some changes.

The model came with a single huge tank between the inlet ducts. My experience of heavy forward tanks in F-4 has been very profound - I lost my first smaller F-4 within the first 20 secs because of a heavy forward tank leading to a too nose heavy CG. So, pictured are the saddle tanks I have just finished building. Not as pretty as USSCAT's but hoping theyll do the job. They hold about 1.6L each. Combined, and with a smaller front tank, I should have around 5.5L.
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Old 05-13-2013, 06:52 PM
  #73  
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Default RE: CJM F-4D Conversion and Build

Hi GRVW,

I have not measured the tanks yet, but the side tanks should hold about 60 Oz each, the middle tank will/should hold close to 80 oz. I moved the stab and rudder control to the tail end similar to JL f-4. Ithink the center tank will counter the extra weight in the tail.

Your F-4 looks good, I have not decided on the paint scheme yet, but it has to be something that i can actually pull off
Old 05-19-2013, 06:31 PM
  #74  
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Default RE: CJM F-4D Conversion and Build

I have removed the area that Mario had pointed out in the previous post. I still need to do more sanding but I think it is well worth it.
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Old 06-02-2013, 12:45 PM
  #75  
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Default RE: CJM F-4D Conversion and Build

Been away for a while, I have managed to glass the wings this weekend.
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