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Mounting EDFs

Hamdhan

The Expert Newbie
#1
Dear Flitetest Community,

I recently finished building my EPX 900NX, its an Eco friendly flier. It is my FIRST plane so it looks kinda messy but its quite good for a first try I'd say. The plane takes off but is really tail heavy so I shall correct it soon. But for now, I have mounted the EDF's with TAPE!! It looks really messy so any of you guys have any ideas on how to make a simple (cheap) EDF to Wing mount [I have 2 external airliner style mounted EDFs but they use tape] :applause:

Ideas are welcome. I have a thread somewhere at Rchobbies.com http://www.rcgroups.com/forums/member.php?u=371472
 

ananas1301

Crazy flyer/crasher :D
#3
That is VERY tailheavy!

You should push your battery way more to the front and also stop trying to fly this beast InSIDE!

That can´t really go well and for the time and effort you put into this plane I wouldn´t risk it.

Also did you have any flying experience before? Your risk of crashing in the first flight with such a plane is much higher then with a trainer.
 

Hamdhan

The Expert Newbie
#4
That is VERY tailheavy!

You should push your battery way more to the front and also stop trying to fly this beast InSIDE!

That can´t really go well and for the time and effort you put into this plane I wouldn´t risk it.

Also did you have any flying experience before? Your risk of crashing in the first flight with such a plane is much higher then with a trainer.
I KNOW its tail heavy, i am now going to mount the batteries at the front or middle accordingly (i'll mount while plane is on a balancer i shall build). I spent ALOT of time into this plane! started with styrofoam sheets stuck them together and sanded it down with basic sandpaper and coping saw is what i had with me.

I'll try use Zip ties if I can get them...

About the first time flying thing, I fly alot of FS and I honestly dont see whats so hard [I am being sarcastic]
I did some flying on a simulator (FMS :D ) and I guess I'll just have to take that risk because I cant afford to get a trainer (too expensive to ship here, perhaps in India but there are no flying locations where I live. I flew a 2 channel trainer once, but I was too scared and just managed to take it off before i gt it back down again in fear of crashing (I was 10 yrs old...). This plane of mine just has to TAKEOFF, no big manuevers, just takeoff and fly level for about a meter or so then land, straight line for now. After that, I will take it to my school field and TAKEOFF and fly over the sea.
 

Hamdhan

The Expert Newbie
#6
What angle do you have the edfs at? Looks like STOL ;)
The EDFs are not at any up or down angle, they are level with fuse, but the fuse is at a high angle of attack hence, now the fuselage sits lower to the ground and more horizontal (but still abit high angle of attack) but lets see how thing go.
 
#7
The EDFs are not at any up or down angle, they are level with fuse, but the fuse is at a high angle of attack hence, now the fuselage sits lower to the ground and more horizontal (but still abit high angle of attack) but lets see how thing go.
I was gonna say it looked like you had the edfs pointed down at least a little to get such a short takeoff but I know what you mean with the way it was sitting on take off. Still pretty impressive for edf!
 

Hamdhan

The Expert Newbie
#9
Nice build, though you're taking off on pure thrust, not any lift!
NEgative, I am taking off with lift, the EDF's run off 2S and hence the plane doesnt have 1:1 thrust ratio, the plane sits at a high angle of attack hence it takes off with the wings.
 

Hamdhan

The Expert Newbie
#13
Then i would first get the plane balanced and see how well the tape holds. It sounds like your options are kind of limited.
My options are VERY limited. I made a mount (no nacelle but a mount) which allows the EDF to hang slightly forward of the wing. This should move up the CG abit, I have to make a new battery canopy while balancing.