Originally Posted by giuseppi

Hey, JaquesE. Do you still have the defective fan?

g

I do, but it's not much good!

Originally Posted by Jacques.Eloff

I do, but it's not much good!

Do you know if the motor works? Since you're stuck any way maybe you could at least salvage something from the deal. If the thing is CAed together, maybe with some release agent you can break it loose and re-position it. Lemonade from lemons, as it were.

Trying to be helpful.

g

I would have offered to sort the problem out with your unit Jacques, but the shipping back and forth would kill the exercise...

Guys, I went down this 35mm path and dealt with the crooked fans, fans flying off, inefficient amp-hog motor, burned up ESCs etc etc ... all written up in this thread.

I eventually fixed the problems myself.

1. I made an Al hub (simple job on a lathe) that the fan fits onto (after the piddling little nipple that takes the motor shaft breaks off in mid-flight). The OD of the Al hub is the same as the ID of the 8 blade fan hub. The ID of the Al hub is the same as the motor shaft OD. The length of the Al hub is just long enough to position the rear of the fan just off the plastic bearing hub. The motor shaft is then glued into the Al Hub, and the Al hub glued into the fan hub, with CA. Now the fan stays on. Note, you can't get the motor out of the EDF once it's all glued in place. So do step 2 first!

2. I rewound the motor using a single strand of thicker Cu wire that I got at Radio Shack (it's the green stuff, .015"). I think, from memory, I only put 7 turns delta on the core. I think that's about all that fits. Again, from memory, I think the factory motor has 6 turns of fine 4 strand wire. In retrospect, you could perhaps put a little more copper on the core if you used 2 strands of slightly smaller gauge wire and kept the 7 turns or perhaps even 8 turns. But this arrangement, with a 2S, puts out as much thrust as the original motor, using less current (I get longer flights). I use a Castle Phoenix 25 esc. I insulate two of the wires to the motor, the third I leave uninsulated (there is no room in the vane for 3 insulated wires). I have no idea what the KV of my motor is, but I am pretty sure it's lower than the original as I have one more turn on the windings. If it's inversely proportional, that would make my KV about 9500. I went to the rewind after burning up an ESC supplied by AEO (and recommended by them ... they would not replace it however when it caught fire and nearly burned my plane to the ground), and then causing a Castle Phoenix 25 to give all kinds of weird error codes. At the end, the motor would not spool up, it just stuttered. I think the factory windings were partially shorting, or unbalanced, or perhaps the full load draw was just too much even for a Castle 25A ESC. I replaced the ESC and rewound the motor and everything was good ... use "normal" advance, option 1 on the Castle menu.

I had hoped that by now, Hu would have sorted out the issues. He has had a year since I reported all these problems to him as well as to this forum, in this very thread. Yet I see he continues to burn customers by shipping a product that he is fully aware is crap. Even if he does ship you replacement fans, those will be crooked too. Happened to me for sure.

3. Regarding the misalignment, this is almost impossible to fix as the tooling that produces the fan duct is at fault. I did ream out the bearing hub with a reamer on my lathe and I cleaned up (with a needle file) the area inside the bearing housing where the 3 wires enter the vane, as the wires tend to push the motor skew due to crowding. But I ended up with a fan that's still a little skew, however no longer rubbing.

I am flying a J-29 Tunnan 1:25 scale plane, balsa scratch built of my own design (well it's modified from a 1:33 plan I got from a Swedish guy who puts Pee Wees in his) and designed this plane around this particular 35mm fan. It now flies well if not super fast on this motor, but only after every effort to lighten the AUW to compensate for the anemic thrust produced by this fan (nowhere near advertised). If someone else comes up with a fan of the same (approx) external dimensions but of higher quality, I will be all over it like white on rice. I would like to be able to use a smaller, lighter ESC, and I would like more efficiency so I can get more than 3 mins or so from a 750 maH battery.

I did consider installing a NEU motor but the bolt pattern as well as the shaft length are not compatible with the AEO fan. Any news on this front? I think the AEO duct is OK if you correct the misalignment. The fan is crap unless you mod the mounting setup. The motor is crap but seems to do better if you rewind it.

Hallo!
I'm following this thread and of course I'm worried about the quality of the AEO EDFs.
For this reason I'm asking your advice about a 45 mm. EDF with motor unit with same or better performance (static thrust and watts) of the ADF45-200 PLUS unit.

Thank - you!!!

ettore

Originally Posted by quenda

Hallo!
I'm following this thread and of course I'm worried about the quality of the AEO EDFs.
For this reason I'm asking your advice about a 45 mm. EDF with motor unit with same or better performance (static thrust and watts) of the ADF45-200 PLUS unit.

Thank - you!!!

ettore

I cannot comment on the 45mm unit, but I do have a 40mm which arrived with a crack motor mount . I managed to repair it using JB Weld - I glued the core of the outrunner to the mount. Seems to run ok after some careful balancing, just hope it holds together.

I just wish the quality/design was better on these AEO fans.

Originally Posted by Jacques.Eloff

Hello Hu

After telling me 3 times you have sent the replacement unit and STILL not giving me a tracking number, I can only assume you are lying. What you have managed to do is push this dispute outside of the 45 day window Paypal requires, so basically I'm stuffed on this one. I thought I would give you the benefit of the doubt ...

Well done!

We sent the ducted fan on March 21st by EMS and emailed you the tracking number.

Originally Posted by AEORC

We sent the ducted fan on March 21st by EMS and emailed you the tracking number.

Nice that you are sending replacements. How about sending a replacement for the incorrectly manufactured 64mm fan I received during the testing? When I tried to get a replacement, you stopped answering my emails.

Originally Posted by Joe 1320

Nice that you are sending replacements. How about sending a replacement for the incorrectly manufactured 64mm fan I received during the testing? When I tried to get a replacement, you stopped answering my emails.

And there was silence........ just like last time. Thanks for taking care of it.

Originally Posted by Joe 1320

And there was silence........ just like last time. Thanks for taking care of it.

AEO hasn't logged on since '5:34' 3/30. Your post was made after. I'm definitely not defending Hu. I'm just putting that out there. He could have another account to view things he doesn't feel like dealing with.

Originally Posted by boredom.is.me

AEO hasn't logged on since '5:34' 3/30. Your post was made after. I'm definitely not defending Hu. I'm just putting that out there. ]

Good point, I don't have a habit of checking those things first. My bet is that you are 100% correct.

Well.... judge for yourself.

AEORC Precise and powerful
Last Activity: Today 02:24 AM
Join Date: Aug 08, 2008

That just reaffirms my negative position.

If anyone is interested in my scratch-built 35mm EDF "e-Tunnan", I have posted some video on youtube ... not the greatest video but sufficient to illustrate the prototype (actually the second prototype ... the first one was too heavy due to the position of the EDF requiring lead in the nose).

Part 1: General technical overview:

e-Tunnan RC EDF Jet Part 1 (14 min 59 sec)

Part 2: Demo flight

e-Tunnan RC EDF Jet Part 2 (6 min 8 sec)

I have worked up a CAD file to allow the complex parts to be laser cut, and built the tooling for the duct and the inlet, thinking that if there is some interest, I will make up 20 kits or so. However, I need to verify that the production version is AOK before I run the kits. I have two beta test units out there so shouldn't be too long before we get the refinements nailed down.

Originally Posted by vh2q

I have worked up a CAD file to allow the complex parts to be laser cut, and built the tooling for the duct and the inlet, thinking that if there is some interest, I will make up 20 kits or so. However, I need to verify that the production version is AOK before I run the kits. I have two beta test units out there so shouldn't be too long before we get the refinements nailed down.

That looks quite nice!

vh2q, nice stuff and video's. You definitely need your own thread or a better place than here in this thread to share and talk about this jet.