64mm EDF Scratch Build

[Andre]

A good FT friend is sending me a 64mm EDF motor.

Wants to see what I'll come up with.

Hmm time to start designing very simple and light air frames.

For some reason some of the classic designs speak to me.

To be honest the de Havilland Vampire looks wonderful.



Or maybe the Grumman A-6 Intruder



I'm really not sure what kind of power the EDF will deliver so I'll have to be really light on the fuselage design.

Still I've not had a SB project to sink my teeth into in a while.

 

[AkimboGlueGuns]

+1 for the A-6, its one of my favorite jets.

 

[Andre]

Problem with the A-6 is with 1 EDF the output is less efficient.

But I'm sure I' could over come that.

 

[Andre]

T-33 T-Bird

 

[Andre]

Actually F-86 would be super simple.

Square-ish fuselage.
Placement of the ESC, RX and battery could prove to be interesting.

 

[ghost civic]

im sure 64mm edf's can very a good amount in thrust...depending on KV of the motor and whether it using a 3s or a 4s.

I have a 64mm edf running on 3s (don't know the motor kv) and it can fly a delta that's AUW is 550grams.

looking at edf's specs on some sites I see anywhere from 400-550 grams of thrust.

But airflow to the edf is a factor. I know some guys have scratch built EDFs running on 2200mah 3s packs...im using a much lighter 1300mah 3s. So those other guys are doing something better because if I had to fly with a larger pack my plane would be kinda slow.

also, I like the vampire....but its shape would be harder to do than some of the others.

 

[Andre]

Yeah my biggest job will be to deliver maximum airflow to the fan.
If I can fine a way to do that cleanly I'll be happy.

I've got some ideas.

 

[PHugger]

I just listened to the After Hours podcast.
They must have tried to get you to answer your phone for like 5 minutes.
They were rolling on the floor discussing your big floppy quad.


Best regards,
PCH

 

[Andre]

Trust me the razing I got after the show was epic.

I was on my hands and knees working on floppy.

My wife just shook her head after she heard the podcast.

Test me to leave my phone on the desk unattended.

New rule now is Chris will let me know when they are in the studio

 

[ghost civic]

Yeah my biggest job will be to deliver maximum airflow to the fan.
If I can fine a way to do that cleanly I'll be happy.

I've got some ideas.

then, depending on which plane you go for, is the airflow OUT of the edf. You don't want much restriction there either. A thrust tube isn't a bad thing, but from what I have seen you don't want it any narrower than the edf and you don't want it to be very long either.

I think power/weight is a tad more important with a EDF jet. because 1, edf's take a bit more time to produce speed than a big prop does and 2, some jet's wings wont provide the same kind of lift that a 40' wing with a 6' cord does.

Ive only done EDFs on delta wing type planes and on a 4' foam chuck glider. It worked really well on the glider, but sits on top with no air restrictions and the whole thing weighs something like 500g. It can fly around with almost less than 1/4 throttle.

 

[Andre]

Yeah motor to the back and battery to the front for CG.

I wonder if a FT Racer could be made into an EDF bird <evil grin>

 

[Craftydan]

Yeah motor to the back and battery to the front for CG.

I wonder if a FT Racer could be made into an EDF bird <evil grin>

Only one way to find out!

 

[AkimboGlueGuns]

my guess would be a yes! That actually sound like a pretty awesome design.

 

[Andre]

I would be tempted to have an open nose like the F-86 Sabre.

But side intakes would work very well on this plane.

I mean the Racer is wide open inside.

Gears turnings. Plus is us a very well handling plane.

 

[Craftydan]

I would be tempted to have an open nose like the F-86 Sabre.

But side intakes would work very well on this plane.

I mean the Racer is wide open inside.

Gears turnings. Plus is us a very well handling plane.

Come ooooon!

You love the Racer! You *KNOW* you want to do it!!!

F-86 nose would totally rock, but with an mid-to-aft engine (to limit the length of your thrust tube) you'll need space for a hefty battery as far forward as you can to balance. Hate to say it, but opening the side cheeks into intakes sounds like the better move.

 

[AkimboGlueGuns]

Yeah, I was thinking the same thing. But if you put in the side intakes you might be able to get the T-33/P-80 look.

 

[Andre]

The thrust out might be interesting.
Specially with how the tail of the racer is.

Hmm. Drawing time.

 

[Andre]

Mike sent me some photos of the motor & fan setup.



I did order a Dr Mad Thrust 40A ESC for EDF which should be strong enough to handle this setup.

Still working on how and what this plane will look like.
I have some ideas but wont know till I have the power unit in hand to get a fell for what kind of thrust an EDF produces

 

[T-Man1985]

That looks like a 4300kv 64mm edf unit that I have. If its the same, expect about 450g of thrust and 25 amps on 3s.

 

[Andre]

Out of a StarMax A-10 I was told.

So no 4S application I assume?