F-4 Phantom - Twin 70mm EDF Monster!!

L Edge

Legendary member
Maiden did not go well- it had no elevator authority. After trying to launch it off a dolly, I hand launched it only to see it cartwheel across our muddy field. A total rebuild this weekend after moving the edfs aft 2 inches. Lets see how Version 2 flies.
Ouch!!!!!!!

If the elevator had no authority, why are you moving the EDF's aft?
 

CrshNBrn

Elite member
Or maybe not enough speed? I heard this was a pretty heavy model.
That's a possibility. I've pulled the paper from the much of the inside of the foam as possible to lighten it. I wish I had video- it just refused to climb. I'll get some video for #2 to help with a potential post-mortem.
 

CrshNBrn

Elite member
Well...it flew...until it didn't. Pretty twitchy with the CG, but got it up into the air. I was in the process of trimming it out way up high when disaster struck . Around 1:30 into flight, I lost all power and controls. I don't know what happened. It went down hard into the trees behind our flying field. I was only able to find a very puffed battery, a wingtip, and the canopy. The rest is 60 feet up in a tree, laughing at me.

As much as it pains me to say this, I think I'm done with foamboard for a bit while I grieve. Seems like I'm losing a battle lately with trees, delaminating DTFB, and the expenses of having to replace electronics when they are destroyed by my crappy piloting and/or foamboard builds.

I'll see you all again when I'm done feeling sad.
 

Houndpup Rc

Legendary member
Well...it flew...until it didn't. Pretty twitchy with the CG, but got it up into the air. I was in the process of trimming it out way up high when disaster struck . Around 1:30 into flight, I lost all power and controls. I don't know what happened. It went down hard into the trees behind our flying field. I was only able to find a very puffed battery, a wingtip, and the canopy. The rest is 60 feet up in a tree, laughing at me.

As much as it pains me to say this, I think I'm done with foamboard for a bit while I grieve. Seems like I'm losing a battle lately with trees, delaminating DTFB, and the expenses of having to replace electronics when they are destroyed by my crappy piloting and/or foamboard builds.

I'll see you all again when I'm done feeling sad.
I'm sorry man! Hope to see you again soon!
 

Redtail1957

New member
IMG_2121.jpeg
Hi this is my 1st reply, I have just built the Flite Test F4 Phantom. Mine is on a 6S 5000 lipo, AUW is 3.2 kgs, heavier than the recommended 2.5 kgs. Mind you my battery is 6S plus paint,hence the extra weight.
 

Redtail1957

New member
Evening Mr Man, I got the clear canopy from China, there’s a Chinese ARF twin 70mm EDF F4 ,thought I’d use their canopy. I’ve put hand hold recesses under the fuselage, in line with the C of G to hand launch.
 

Redtail1957

New member
Gorgeous! You must have been holding on to your kit for a while- the FT store has been sold out of them forever! Great build.
I’ve had the kit for a couple of years. As you mentioned, you can’t buy them now - same with F18. Flite Test advise to build one of their simpler builds before a Master Series. I looked a the build videos loads of times and got my head round it, also it’s my first experience using a hot glue gun. The mapping symbols and build by FT is very clever. I’ll probably build another FT kit, probably the C47 / DC3.