Electra Jet twin EDF conversion

[Babylon5]

Here is my latest twin EDF experiment.
The twin EDF conversion flew quite fast.
Planes weights a hefty (just over) 1kg with 2100maH 3S packs x 2.
Ducted fan unit is 68mmEDF from SFM(super Flying model)
Motor is align 430BL-3550KV.
Initial current drain is 50amps and will settle down to 42 amps after a minute of run.

Thrust to weight ratio of greater than 1 is achievable.

Unlimited vertical climb is achieavable with this setup.

Inspite of the added weight (batteries and added 1 more EDF unit) the plane glide pretty well during landing approach.


The first flight was nearly a disaster as I experience quite a bit of trim out.
I could not control the model well and was force to cut the throttle during a turn and the plane went into a flat spin. No damage.
After adjusting the elevon push rod and re-trimming the plane flew great.

My thanks to Ridz and Loyn for making the launch sucessfully.

If anyone has converted the Electra Jet from Pusher to EDF please share with us your pictures and experience.

Cheers

[adino]

may i ask how did u set-up ur 2 motors & 2 esc? coz, i'm having some problem with mine.

Mine is : -y-cabled the 2 esc rx wires n plugged it into throtle channel
-connected the 2 esc batt wires through a parallel wire & plugged it
in to 1 batt

problem is, only 1 fan is spinning.

any advice?

[Murdanny]

may i ask how did u set-up ur 2 motors & 2 esc? coz, i'm having some problem with mine.

Mine is : -y-cabled the 2 esc rx wires n plugged it into throtle channel
-connected the 2 esc batt wires through a parallel wire & plugged it
in to 1 batt

problem is, only 1 fan is spinning.

any advice?

what transmitter are you using? maybe you can put one in throttle and another one in an aux channel. then do a mix on your throttle and aux?

maybe got other suggestions here. just my 2 cents.

[Adrianli]

May I suggest something?

Keep the wires between the motor n ESC as short as possible so that the motor runs more efficiently.

Sorry for being a kay poh n giving my 2 cents.

[Jack_Chen]

that's pretty amazing thrust considering the weight.

[Babylon5]

may i ask how did u set-up ur 2 motors & 2 esc? coz, i'm having some problem with mine.

Mine is : -y-cabled the 2 esc rx wires n plugged it into throtle channel
-connected the 2 esc batt wires through a parallel wire & plugged it
in to 1 batt

problem is, only 1 fan is spinning.

any advice?

Hi, first check the following:-
With both ESC set up.

1) Make sure the Y harness and connectors are plug correctly. Check electrical continuity with a multimeter between the ESC and all the way to the Y harness.

2)Try to run the motor ESC one at a time
First label the motor Left and right.
Try to plug one ESC(& motor) to the Y harness one at a time say the Left motor and runs , try both, note which motor runs.Swop the ESC& motor around . Is it only the particular motor runs only? You need to do a matrix in your observation to determine the cause.


Lastly ,I have come across some ESC that do not permit twin setup.
In my case, both motor refuse to turn when both set of ESC are plug to the Y harness during power up. The motor runs only on single.
Nothing much I can do except change to another ESc that works.


Cheers.

B5

[viper1990]

may i ask how did u set-up ur 2 motors & 2 esc? coz, i'm having some problem with mine.

Mine is : -y-cabled the 2 esc rx wires n plugged it into throtle channel
-connected the 2 esc batt wires through a parallel wire & plugged it
in to 1 batt

problem is, only 1 fan is spinning.

any advice?

Try reprogramming one esc at a time and make sure both works first.

Or... it is because you haven't set your throttle range.

To set both esc's to detect your throttle range of your transmitter,(Apply to most escs )
1. throttle up
2. connect esc to batt
3. wait for beeps within 3seconds or so (don't enter programming mode)
4. quickly throttle down
5. hear a few beeps, usally 2 beeps for 2s , 3 beeps for 3s
6. just wait a little longer, few more seconds... when it stops the beeping
7. you are ready, throttle up to see motor is working or not.

Ok, anyway, its best if you let us know your model of esc too so those own that esc can help you with it!

[Babylon5]

may i ask how did u set-up ur 2 motors & 2 esc? coz, i'm having some problem with mine.

Mine is : -y-cabled the 2 esc rx wires n plugged it into throtle channel
-connected the 2 esc batt wires through a parallel wire & plugged it
in to 1 batt

problem is, only 1 fan is spinning.

any advice?

Hi Adino, did you resolve the problem with the twin setup?

Cheers

[viper1990]

His twin ducting is working fine, it went into the Singapore Poly FYP showcase... and i must say his project is pretty impressive..

A UAV that can fly and land on water..., and able to submerge underwater and moves like a sub.