Kunphushun
Member
Absolutely awesome!!! Can't wait for the maiden video!
F-4 Phantom - Twin 70mm EDF Monster!!
- Thread starter Mid7night
- Start date
Michael9865
Elite member
Looking great.
Air Force One
New member
WOW! Amazing. Just a couple questions. First, what paper should I print plans on? A4? US Letter? Can you do an overview video where you go over component placement, retracts etc? And also what retracts are you using?
Edwardchew
Active member
Holy that sounds like the real thing! can i say it's 2x70mm = 140mm EDF? haha
that crash... :black_eyed:
that crash... :black_eyed:
Thanks! Oooh, wet tarmac pics is an excellent idea....
Planning to fly either this Friday or Saturday after Thanksgiving.
Unfortunately the plans are not tiled as of yet, so you'll need to either get Kinkos/Staples (or similar) to print full-size, or reach out to others here who have more experience than I with tiling.
Retracts: These are the units I used for the mains, and I just bent my own wire and used 2" wheels:
https://www.motionrc.com/products/flightlinerc-electronic-retract-type-a
This is the unit I used for the nose:
https://www.motionrc.com/products/freewing-80mm-edf-mirage-2000-nose-landing-gear
I will try to do a video SOON that is an overview of the F-4, talking about components and such. Thanks for the request!
Not counter rotating. The EDF units are these:
https://www.banggood.com/FMS-70mm-1...5-KV2750-Motor-For-RC-Airplane-p-1023640.html
I used standard Flite Test Water Resistant Foamboard. It takes 7 sheets.
Colors should correspond to traditional FT convention.
Black: Cut
Red: Score
Blue: Crease/50% score
Green or magenta lines are reference only.
AILERONS: You have a choice - 1) simple, like I did at FFEast (no flaps), 2) Full Scale (as here) with flaps
Full disclosure: Flaps are not necessary, and unless you really want the scale deflection appearance, go with the simple ailerons.
Simple ailerons basically hinge just the overhanging trailing edge bit of the foam - the overhanging part of the upper surface when you fold it over. And the full center portion of the wing - from the side of body to the outer wing break. Mount the aileron servo as best you see fit (yes this needs improvement in the plans). Simple cut, simple hinge - but it works.
Scale ailerons are as they sound: scale. I didn't really measure (probably should do that and add it to the plans), I just eyeballed a 3-view and cut out the ailerons and flaps. If you go scale, the hinge will still be the upper surface paper, but you'll need to trim away a bit of the lower surface foam to allow movement. Trim and move as needed.
Yes: I built the wing up and THEN cut ailerons and flaps, and mounted the wing servos as needed. I just cut a hole for the servos, saved the piece of foam, glued the servos in and glued the foam piece back on.
Black: Cut
Red: Score
Blue: Crease/50% score
Green or magenta lines are reference only.
AILERONS: You have a choice - 1) simple, like I did at FFEast (no flaps), 2) Full Scale (as here) with flaps
Full disclosure: Flaps are not necessary, and unless you really want the scale deflection appearance, go with the simple ailerons.
Simple ailerons basically hinge just the overhanging trailing edge bit of the foam - the overhanging part of the upper surface when you fold it over. And the full center portion of the wing - from the side of body to the outer wing break. Mount the aileron servo as best you see fit (yes this needs improvement in the plans). Simple cut, simple hinge - but it works.
Scale ailerons are as they sound: scale. I didn't really measure (probably should do that and add it to the plans), I just eyeballed a 3-view and cut out the ailerons and flaps. If you go scale, the hinge will still be the upper surface paper, but you'll need to trim away a bit of the lower surface foam to allow movement. Trim and move as needed.
Yes: I built the wing up and THEN cut ailerons and flaps, and mounted the wing servos as needed. I just cut a hole for the servos, saved the piece of foam, glued the servos in and glued the foam piece back on.
Hi Ben great design !
Love these planes so I'm gonna give your plans a go .
I've been having a long hard look at the plans and your build photos and I can't see a centre section for the wing or elevator anywhere.
Also roughly what angles are used for the elevator and wing tips ?
Cheers Rosco ��
Love these planes so I'm gonna give your plans a go .
I've been having a long hard look at the plans and your build photos and I can't see a centre section for the wing or elevator anywhere.
Also roughly what angles are used for the elevator and wing tips ?
Cheers Rosco ��
Success!! The F-4 flew again, this time with paint, and came back in one piece! Flew better with a little tail weight and more elevator throw, but now I need to move th CG forward a bit. No biggie, she'll fly again!!
Thanks to my dad for the video, and to my wife for her patience and support!
Thanks to my dad for the video, and to my wife for her patience and support!
Air Force One
New member
Will there be a Dan Sponholz version of the plans? Your plans are amazing but they are a bit confusing to follow. This is on the build list right after I'm done with your A-4!
LOL, I must apologize for my spartan plans...I certainly focus just on getting the most out of each sheet, while Dan is much more thorough.
I can't say for sure, but I think I can say he wants to but it won't be soon. 😉
I've gotten a few requests on YouTube for a more detailed overview of the F-4, so I plan on doing that soon. That should help to answer many of the construction and build questions. Stay tuned!
Glad you like the A-4!
Zephyr1
Elite member
Holy crap this is amazing. How difficult do you think it would be to put 50mm edfs in it? The same ones used your F-5? I'm thinking of attempting a stripped down version(no retracts, no flaps, no rudder, conventional elevator, smaller battery). What do you think?
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