Official Freewing 90mm Eurofighter Typhoon EDF Jet Thread

[Evan D]

Congrats and she looks great. Good job!

[Radar-Guy]

Maiden flight (+2) in the books. 8s Wemotec 1680kv fan. Now to the missing decals.

[ArnoldT]

ArnoldT & Dave,
i am wondering if your throttle end points are -100 to +100 or set to a different value? i checked mine after i completed binding (i am using 8 channel spektrum) and mine was set as -120 and +100 (i don't know why/how low end was set at -120 while all my other planes are -100) .... wondering if you or anyone else ran into this.
Mine is stock 8s setup.

Hi,
yeah my throttle end points are -100 to +100. I am using spektrum NX10.

[Luqman Khan]

After my 6s EF's third flight the connector is so hot it melted the foam and the battery wires are very very hot. I used a clampmeter to do ground static amps test and it's 145A. I understand that static is higher than in-flight amps but my other 90mm EDF is only drawing static 120A. I changed the motor timing to 0 degrees and I still get the same 145A. Did anyone do a ground amps test on your 6s EF? Thanks.

ArnoldT & Dave,
i am wondering if your throttle end points are -100 to +100 or set to a different value? i checked mine after i completed binding (i am using 8 channel spektrum) and mine was set as -120 and +100 (i don't know why/how low end was set at -120 while all my other planes are -100) .... wondering if you or anyone else ran into this.
Mine is stock 8s setup.

[hellcat716]

This is how my ribbon cable fit together. Does not go all the way in. Both cables fit the same way.

[Dave Grife]

Oddly, I seem to be running @ 140 + Amps, which drops to 130 something. (3000W +)
I actually have and tried two different motor/fans and two different ESC's.
Suspecting that something is inconsistent among 6s fan/motors

[Evan D]

Mine latched in securely.

[hellcat716]

When I plug in the ribbon cable from the fuselage to the wing the plug in connection does not seem to click or lock in place . It is the same on both sides. Is this normal! Seems like it will eventually pull apart in flight.

[BenOzzy94]

Getting there, just need to paint the wings, finish the decals and clear coat. Then to weigh it and cringe at the extra weight

[kallend]

I'm using XT90. While XT90 amps rating is lower than EC5, I have no issue using it on other 90mm edf that are drawing 120A. But 150A+ on my EF is definitely too high for XT90 that causes it to heat up and melted the foam.

A cold solder joint/inferior connector means higher resistance but doesn't increase the amps. It will create heat at the joint due to higher resistance. One way to test such joint is to compare the amps before and after the connector. If the amps are the same, it means there is no high resistance from poor joint/connector.

The amps have to be the same each side of the connector (Kirchoff's law). A poor (high resistance) joint will cause a voltage drop across the connector (Ohm's law).

[TonyTaff]

I'm very surprised they agreed to accept a battery return.

I think that Motion RC did the right thing... recognized a mistake and took care to have a happy customer ( Me) and change their recommendation... Good Customer relations.

[Evan D]

It’s not the connector. It’s the motor or load on the motor. I’d pull the fan and inspect it and check to make sure the right motor is in it. If it all looks right contact Motion or who you got it from for advice.

[ArnoldT]

I'm using XT90. While XT90 amps rating is lower than EC5, I have no issue using it on other 90mm edf that are drawing 120A. But 150A+ on my EF is definitely too high for XT90 that causes it to heat up and melted the foam.

A cold solder joint/inferior connector means higher resistance but doesn't increase the amps. It will create heat at the joint due to higher resistance. One way to test such joint is to compare the amps before and after the connector. If the amps are the same, it means there is no high resistance from poor joint/connector.

[GliderGuy]

How would that explain the 145A current?

It wouldn’t….just offering something else to check based on past experience.

-GG

[kallend]

Heads up….may just be the EC5 connector. I had one with a poor internal construction error. The poor internal construction error caused such a hot EC5 that the EC5’s plastic bubbled/melted.

Try replacing the EC5. That may solve the high temperature issue.

-GG

I have moved to the flower-petal bullet design for all my EDFs to avoid this issue. Link follows:

https://a.co/d/g2M0cCc

How would that explain the 145A current?

[GliderGuy]

Heads up….may just be the EC5 connector. I had one with a poor internal construction error. The poor internal construction error caused such a hot EC5 that the EC5’s plastic bubbled/melted.

Try replacing the EC5. That may solve the high temperature issue.

-GG

I have moved to the flower-petal bullet design for all my EDFs to avoid this issue. Link follows:

https://a.co/d/g2M0cCc

[kallend]

I haven't measured the draw of the stock 6S in my V3 Eurofighter but it certainly doesn't get the connector and leads hot enough to melt foam, nor does it result in short flights.

The4068-1835Kv 12B unit in my V2 Eurofighter pulls 116A and produces 3.1kg thrust installed (static), and I though that was a lot.

[ArnoldT]

duplicate post. Admin, please help to delete thanks.

is the motor noisy or unbalanced, have any of the blades scoured the fan housing.? Have you tried swapping the esc from your other 90mm edf . Are there any dodgy connections ? Is there free airflow over the esc ?

motor sounds and looks fine. no doggy connection because on my clampmeter I measure at wires from battery and wires after connector and they are drawing same amps. esc's airflow doesn't caused high amps, and each test is less than 5 seconds full throttle. Swapping esc will be my next approach as I want to be sure first that the normal full throttle is 120A instead of 150A.

[ArnoldT]

is the motor noisy or unbalanced, have any of the blades scoured the fan housing.? Have you tried swapping the esc from your other 90mm edf . Are there any dodgy connections ? Is there free airflow over the esc ?

motor sounds and looks fine. no doggy connection because on my clampmeter I measure at wires from battery and wires after connector and they are drawing same amps. esc's airflow doesn't caused high amps, and each test is less than 5 seconds full throttle. Swapping esc will be my next approach as I want to be sure first that the normal full throttle is 120A instead of 150A.

[paulrkytek]

After my 6s EF's third flight the connector is so hot it melted the foam and the battery wires are very very hot. I used a clampmeter to do ground static amps test and it's 145A. I understand that static is higher than in-flight amps but my other 90mm EDF is only drawing static 120A. I changed the motor timing to 0 degrees and I still get the same 145A. Did anyone do a ground amps test on your 6s EF? Thanks.

is the motor noisy or unbalanced, have any of the blades scoured the fan housing.? Have you tried swapping the esc from your other 90mm edf . Are there any dodgy connections ? Is there free airflow over the esc ?