F-15EX Eagle II build journey

[mayan]

Alright so a little update here.
After I taped the plans to the foam board I seperated parts from one another, to create smaller pieces so it will be easier to cut the parts out.
This way I can more easly rotate the piece to cut out the part with more ease.
Once that was done, I started cutting out the parts, a process that took two days of work.

The end result of this...

Is this.

The side on the left is everything that I cut out so far, the one on the right is everything that needs to be cut out again mirrored.

But wait, I have finished just yet. Remember I said that some of the parts need to be mirrored? Well quite a few of them need to be so about another two sheets of foam board, taping and cuting to do. I'll try to many use scrapes that I have laying around for the smaller parts and full sheets only when it's a must.

A question for you all just to make sure I ain't stupid. On foamboard there isn't any really reason to mirror a piece unless you need to score cut the right side or am I wrong?

 

[mayan]

Alright so a little slow because as a hobbist I get distracted into different projects, this time it was modeling a wheel set for and SU27 model you can read about that here: https://forum.flitetest.com/index.p...possibillities-are-endless.76179/#post-764393

Any how back to this subject.
I taped back to foam board the pieces that needed to be mirrored over, and like I assumed it was about two more sheets of foam board. So about 6-7 in total.

I also started cutting out these pieces but didn't get to far, and cut out only the bigger pieces, got about another 17 to go ...

Will get there soon after I make myself another SU27. One thing that really bums me out is the fact that I thought that my two 70mm EDF would be suitable for this model but they aren't. Which means that I need two new 70mm EDFs with 12 blades that can drive about 2.2kg of trust each, to make this able to fly. More over i'll also need two new 80A+ ESCs for this .

Hope to get the budget or find a dorner for these parts soon.

 

[mayan]

That’s it finished cutting out all of the pieces now I just need to study the build pdf and get to building. I’ll still have to wait for the two 70 edfs that I need to order.

 

[CrshNBrn]

Mind if I join your build, Mayan?

 

[mayan]

Mind if I join your build, Mayan?

Hell no be my guest

 

[CrshNBrn]

Thanks. That was a TON of foam to cut out.

 

[CrshNBrn]

Did a little more assembly today- pretty straightforward build (so far) once all the pieces are cut out. I've got to wait on some electronics, so I may have to slow down a little. I do worry about sealing up a section before I've run the wiring properly.

The only issue I've noted so far is that the plans call for a 30 cm carbon fiber tube for the wing...when you actually need one over twice as long (70cm). The spar appears at 6:35 in the build video.

It's big.

 

[dberg97]

I’ve been wanting to see someone else build a plane from this source. Looking great so far.

 

[CrshNBrn]

Added ailerons with hinge tape, fashioned the nose piece, and built the fuel tanks. The rail system on the pylons is really clever, and Mayan's 3D printed pieces make it easy to build.

 

[CrshNBrn]

Added two servos for the rudders and ran the rat's nest of wires down through the center channel. Don't do what I did and wait to add your wiring until the end- it was challenging to fit a bunch of wires through there. I'm also not sure if I cut the slots for the horizontal stabilizers correctly or not, but you'll see in the photo that didn't line up correctly. Easy fix though. Did I mention this thing was BIG?

 

[CrshNBrn]

Got all the flying surfaces working and landing gear installed. The main gear is from a Freewing F-15, which is a little small for this sized plane. The nose gear is off a Zeus EDF. Lets see if I can land this beast without ripping any of them out.

 

[mayan]

Damn this is looking great! Can't belive you beat me to it .

 

[CrshNBrn]

Its not too bad, once all the foam was cut out. The trickiest part was making sure the edges butted together correctly. I'd go back and forth from the build video to the pictures of the plans to make sure...and even then made a few mistakes.

 

[CrshNBrn]

The underside cheater holes, landing gear, and a taxi test. Its too cold right now for painting, but hopefully that will change soon.

 

[L Edge]

The underside cheater holes, landing gear, and a taxi test. Its too cold right now for painting, but hopefully that will change soon.

Got a question about your location of main gear.
If you lift the nose, does your tail end start scrapping at a very low angle? Landing flares may need higher clearances to prevent accidents.

I also would suggest you strengthen your rudders. Have you ever had a plane go into flutter mode?

 

[mayan]

@CrshNBrn I also got a question did you use my 3D print pieces or plywood?

 

[CrshNBrn]

Got a question about your location of main gear.
If you lift the nose, does your tail end start scrapping at a very low angle? Landing flares may need higher clearances to prevent accidents.

I also would suggest you strengthen your rudders. Have you ever had a plane go into flutter mode?

Good question. It's pretty low, so I added some Gorilla tape to the bottom of the tail end. It does bend upward behind the nacelles so it shouldn't be too bad. We won't find out til we fly it!

Good idea about the rudder, too. I ran a CF rod down the middle, but am thinking about also adding a thin dowel to the leading edge for additional support.

 

[CrshNBrn]

@CrshNBrn I also got a question did you use my 3D print pieces or plywood?

Mostly your pieces- thanks for sharing them. I added a couple of plywood pieces where the main gear was located and on top of the EDF supports.

 

[JetCrafts]

sheeesh