HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Dec 05, 2008, 07:49 PM
Registered User
San diego, Ca.
Joined Jun 2006
1,436 Posts
Build Log
6mm Fly 70mm large- F-4 phantom edf conversion

Here's the next build, 6mm fly f-4 phantom edf conversion. I expected the plans to come out to 46in long but I under-scaled it a little and it came out to be 44in long. Reasonably larger than the 39in version 6mm fly offers for pusher jet. Really did not want to make this a pusher jet because I wanted to build it large.
So here's the scoop,
Fuse will get glassed
70mm fan
Retracts
and Scale cockpit, and jet nevertheless

It will be built out of blucor foam. There will be a ton of mods that I am going to do on the jet to make it edf friendly.

Only printed up the plans for now, yard stick next to it for scale. Will spend the next few days taping plans together, cutting plans out, and cutting out parts from blucor. Then will get started on putting this puppy together!

FJ
FlyJumper is offline Find More Posts by FlyJumper
Last edited by FlyJumper; Dec 07, 2008 at 11:42 PM.
Reply With Quote
Sign up now
to remove ads between posts
Old Dec 06, 2008, 02:43 PM
Registered User
San diego, Ca.
Joined Jun 2006
1,436 Posts
Got a start. Spent all last light cutting out the plans from paper and transferring them to blue foam.
The section in the picture is the main fusealage side. The plastic had to get peeled off it to be able to get sanded in the future. If you've ever tried peeling off plastic from blue core foam, you know how frustrating it gets.

FJ
FlyJumper is offline Find More Posts by FlyJumper
Reply With Quote
Old Dec 06, 2008, 08:23 PM
Registered User
San diego, Ca.
Joined Jun 2006
1,436 Posts
Added the foam strips to the sides of the fuse, then put the fuse together for a dry fit with the bulkheads in place.

FJ
FlyJumper is offline Find More Posts by FlyJumper
Reply With Quote
Old Dec 06, 2008, 09:09 PM
Registered User
San diego, Ca.
Joined Jun 2006
1,436 Posts
Added a metal plate to add angle to the tail section of the fuse.
Next is to glue both sides together.
I hope I have enough room inside to mount the edf system. I was originally planning on running two 48mm, but I am considering going with one 70mm on 4s. Due to the space is limited.
The inlet ducts will be made our of fiberglass, the plug will be white foam though. Since I may be only running one unit the thrust tube can either be a y shaped and come out of both exhaust, or one coming out of the middle of both, and have mock exhausts on the sides.
Still a while till I get to that point.

FJ
FlyJumper is offline Find More Posts by FlyJumper
Reply With Quote
Old Dec 06, 2008, 10:50 PM
Now in TN!
J Morgan's Avatar
Chapel Hill, TN USA
Joined Apr 2001
24,704 Posts
Good looking build FJ. Do you know if anyone else has converted the 6mm F-4 to EDF or is this uncharted territory?

J
J Morgan is offline Find More Posts by J Morgan
RCG Plus Member
Latest blog entry: OV-10A Bronco from Palmer Plans
Reply With Quote
Old Dec 06, 2008, 10:56 PM
Registered User
San diego, Ca.
Joined Jun 2006
1,436 Posts
Thanks J,
I think, as of now, this is uncharted territory. I haven't seen any other build threads on an edf conversion of this.
I just love f-4's, they looks so massive!
And especially after seeing yours, I just had to build one.

FJ
FlyJumper is offline Find More Posts by FlyJumper
Reply With Quote
Old Dec 06, 2008, 11:05 PM
Now in TN!
J Morgan's Avatar
Chapel Hill, TN USA
Joined Apr 2001
24,704 Posts
Yep, F-4s are my favorite too. Just take your time, you'll get it worked out. If you can fly an F-104, you can convert this bear.

J
J Morgan is offline Find More Posts by J Morgan
RCG Plus Member
Latest blog entry: OV-10A Bronco from Palmer Plans
Reply With Quote
Old Dec 07, 2008, 05:12 PM
Registered User
San diego, Ca.
Joined Jun 2006
1,436 Posts
The tail of f-4's cant down at about 23 degrees if I remember correctly. Made some balsa wood brackets to give it about 23 degrees downward. Also added the top section of the rear fusealage.Last night I added gorilla glue to the creases where the bulkheads meat the sides to fill some creases and gaps. I knew this glue expands but did not expect it to expand this much! Looks messy, but at least it did fill the gaps!
It's starting to look somewhat like a Phantom!

FJ
FlyJumper is offline Find More Posts by FlyJumper
Last edited by FlyJumper; Dec 07, 2008 at 05:18 PM.
Reply With Quote
Old Dec 07, 2008, 07:01 PM
Now in TN!
J Morgan's Avatar
Chapel Hill, TN USA
Joined Apr 2001
24,704 Posts
Gorrila glue or Probond can get away from you pretty quick. I know. Try the white Gorrilla sometime, it still expands and dries quicker.

J
J Morgan is offline Find More Posts by J Morgan
RCG Plus Member
Latest blog entry: OV-10A Bronco from Palmer Plans
Reply With Quote
Old Dec 07, 2008, 08:20 PM
Registered User
San diego, Ca.
Joined Jun 2006
1,436 Posts
Some more progress. Started on the wing and getting the tips to slant up.

FJ
FlyJumper is offline Find More Posts by FlyJumper
Reply With Quote
Old Dec 07, 2008, 08:53 PM
Always optimistic
foxflier's Avatar
North of Houston, TX
Joined Feb 2005
288 Posts
Quote:
Originally Posted by FlyJumper
Thanks J,
I think, as of now, this is uncharted territory. I haven't seen any other build threads on an edf conversion of this.
I just love f-4's, they looks so massive!
And especially after seeing yours, I just had to build one.

FJ
I've built one. Flies great. Just watch the AUW

http://www.rcgroups.com/forums/showthread.php?t=849278

A 70 on 4S should be great power for this size bird...
foxflier is offline Find More Posts by foxflier
Reply With Quote
Old Dec 07, 2008, 09:11 PM
Registered User
San diego, Ca.
Joined Jun 2006
1,436 Posts
Foxflier, Great looking bird!
Was yours the original kit size, or did you enlarge it?
Also, out of curiosity, what led you to go with one fan instead on 2?

FJ
FlyJumper is offline Find More Posts by FlyJumper
Reply With Quote
Old Dec 07, 2008, 09:32 PM
Registered User
San diego, Ca.
Joined Jun 2006
1,436 Posts
Quick shot with ducts on.
Can't add the side ducts yet because I need to get the edf unit fit in first.
The side ducts should actually be further up than they are in the picture, was not paying attention.

FJ
FlyJumper is offline Find More Posts by FlyJumper
Reply With Quote
Old Dec 07, 2008, 09:59 PM
Always optimistic
foxflier's Avatar
North of Houston, TX
Joined Feb 2005
288 Posts
Quote:
Originally Posted by FlyJumper
Foxflier, Great looking bird!
Was yours the original kit size, or did you enlarge it?
Also, out of curiosity, what led you to go with one fan instead on 2?

FJ
Hey FJ,

Battery size & weight mainly but I also like single fan simplicity. To me it seems like the complexity of twin fans is a lot of times a big tradeoff that doesn't gain anything by the time you add the weight to the airframe.

Mine is based off the free plans which is basically the 6mmflyrc version...

Lookin' good!
foxflier is offline Find More Posts by foxflier
Reply With Quote
Old Dec 07, 2008, 10:02 PM
Registered User
San diego, Ca.
Joined Jun 2006
1,436 Posts
Yup, those are the same plans I used, but mine is enlarged 125%.

FJ
FlyJumper is offline Find More Posts by FlyJumper
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion jhh f-4 phantom edf maverick pro Electric Ducted Fan Jet Talk 210 Apr 09, 2013 11:01 AM
Wanted f-4 phantom edf rtf or arf dave1982 Aircraft - Electric - Jets (FS/W) 0 Feb 14, 2008 11:56 AM
Question 6mm fly rc F-4 Ducted fan conversion DESIGN ENGNR Foamy EDFs 3 Nov 18, 2006 04:33 PM
For Sale EPP F-4 Phantom EDF with Fan and Brushless Motor $49 shschon Aircraft - Electric - Jets (FS/W) 6 Mar 31, 2006 10:42 AM
Anyone build/fly AERC F-4 Phantom War Bird Radio Parkflyers 3 May 11, 2003 07:19 PM