GWS55mm EDF impeller hub

[Babylon5]

Hi, am looking for the new impeller(propeller) hub for the above EDF see attachment.

I went to R hobby, They have the EDF shroud & impeller but don't have the impeller hub.

Went to the GWS site to search...but picture and parts shown is unclear...not very sure the impeller hub is the old version(force fit) or the new version (longer aluminum hub with a frontal screw)

Because of the force fit action of the older version,I dislike the older version impeller hub because it is very problematic when trying to install or take out the rotary impeller.

Can anyone help? Thanks for any advice.

Cheers

[PIPS HOBBY]

EDF55A
TREAD


Version II EDF55 6-Blade 2.2x 4.5 - NO MOTOR

New GWS EDF 55 Fan Unit WITHOUT Motor, for easy brushless installations.

New Version II EDF55 are black plastic, and use a screw to hold new adapter and impeller hub together for reliable operation at higher power levels.
The EDF-55-300H can take advantage of 2S Lithium packs (10C or better) as small as 450mAh, to get maximum thrust per gram. You can use 3S lithium 10C packs of 800mAh or more.
__________________

[viper1990]

Erm..just a question, i bought the gws Edf55-300H for quite sometime already.., running on 2s , you said that go for 3s for more thrust.., but on the EDF specifications of the motor shows that putting in 10.8v+ is in red...(see picture) means that it'll overheat the motor? so it is still safe to use 3s on that motor?

[Babylon5]

Hi, 3 s Lipo are for brushless motor. What motor are you using?

Cheers

[viper1990]

oh,i'm using 300H brushed motor..

[Babylon5]

Hi Viper1990, one more thing.....the chart you have attached ,are data for the stock brushed motor. Don't wast time with brushed motor on EDF. They won't last very long on the EDF setup.

Just go for the correctly matched brushless motor. Plenty of info on other similar thread.


Cheers

[viper1990]

Ah, ok... i just went today to rotor hobby and got myself a BL motor 4300kV. one tinie winie problem though..is it can't fit into the GWS55EDF casing..the motor has about 3mm protrusion from the front(see picture). I though it was possible to fit . Erm..i'm sure there are other casing which would allow this BL motor to fit..just don't know which one. Any suggestions? How about the haoye edf?

[Babylon5]

Ah, ok... i just went today to rotor hobby and got myself a BL motor 4300kV. one tinie winie problem though..is it can't fit into the GWS55EDF casing..the motor has about 3mm protrusion from the front(see picture). I though it was possible to fit . Erm..i'm sure there are other casing which would allow this BL motor to fit..just don't know which one. Any suggestions? How about the haoye edf?

What size (diameter) of EDF you wish to use your motor? 4.3Kv motor is high rpm low torque so careful matching between motor and EDF is recommended.

Do you have a thong type current meter? If not you should get one so that you can measure if the current exceed the max rating.

One suggestion for use of the 4.3kV motor is to use with a gear box for propeller driven application.

Unless you still want to go for EDF, you can try the 68mm super flying model from Jet hobby. The EDF is only $18. This inexpensive fan allows a variety of motor to fit into it from 20mm to 29mm diameter and good for entry level.
This is a 6 bladed paddle .

Jet hobby has also the 5 bladed paddle version EDF that looks like the wemotec fan so do not purchase the wrong EDF.


However, you may need to purchase a seperate prop adapter motor shaft as the SFM EDF allows 2.3mm diameter shaft. Bring your motor to the shop and the owner of Jet- hobby can help and advise you.

If you have decided to use this fan, try to run the motor and check out the current drawn. If the current drawn is too high or your motor runs hot ,you may have to reduce the 6 blade to 3 blade and repeat your current drawn test.

Your thrust will be reduced with the 3 blade removed ...hopefully not so much in this setup. It is better to run your motor at lower power than to experience a melt down and an early demise of your fan , motor and worst still the ESC.

However, if you want better EDF you should go for Wemotec with Mega or other better motors.


By the way , we have posted quite alot of info on the GWS 55mm EDF . This EDF can take only a max of 24mm Diameter motor and 2mm shaft and is limited to no more than 3.9KV motors on 3 cells Lithium batteries...although there are exception to the K.V.

As for Haoye EDF , I have not use it so I cannot tell if your motor is suitable.

Hope this will help.

Cheers

[viper1990]

Hi again.., i went down to fookhai yesterday to search for a EDF that could fit my motor..., unfortunately all the RC stores there are out of stock.., even jethobby! haha didn't know they were so sellable. Jethobby said that EDF68mm stock will be back in 2weeks. ( i hate waiting ).

[viper1990]

Hearing that 4000kv and higher is abit risky..., i downgraded it to 3550kv.. lucky i can change my motor for this.., its a 430L size BL from ALGIN.

Specification:
-Input voltage: DC7.4~14.8v
-Max output efficiency:91%
-Max continuous current: 28A
-Max output power:300W(prox.)
-KV value:3550KV
-Dimension: spindle 3.17x27.5x33mm
-Weight: 58g (prox.)

And yep.. i bought a ducted fan 68mm that can house that motor with a little bit space left.

Lastly thanks Babylon5 for your help on Ducted fans and Bl motors... i found out and learn many things i didn't know a week ago. Oh ya, sry for posting stuffs not related to this thread. I was desperate for anwsers

[edmond22]

Babylon5, how is the GWS EDF55 limited to KV 3900?

[Sunstorm]

Not really. You can put in any motor you like, as long as it fits.
I have a little monster of a 4600 kv codenamed the GWBLM005.
GWS EDF 55 is just the canister name.
Some EDF comes with the brushed motor, some without.

[edmond22]

not that sense, what I meant is that a 4200kv motor like Himax 2025 4200 can run well on EDF 55 and it is a good combination.

There are no exception to the KV and I do not think is it limited to 3900kv stuff only. If there is heat concern or fear of meltdown, then it is more of a different matter where the motor is pushed beyond its intended usage and anymore power poured in is simply turned into heat, that is the real problem! So the issue is simply a selection of a good motor. Bad motor means bad heat dissappation, low heat tolerance, low efficiency or a combination etc etc.

I am into speed and trust me, where motor is concern, I tried reving up a Medusa motor till it peaked 90over amps on me and the bugger is still kicking the sky. But if you get a not so established brand like GS and get the closest equivalent of that brand to compare, you will not even get to record anything near 60 amp before it burns out on you, it even melts the surrounding EPP and oracover! One turns current into forward flight more and the other turns current into a heating iron. simple as that, they are the same KV and size for the same prop as far as I am concerned.

[Babylon5]

Babylon5, how is the GWS EDF55 limited to KV 3900?

Hi, Edmond,
Here are some of the result 3 cells lipo with GWS 55EDF 6 paddle impeller using B20-40-xx motors :

3.2KV walkera B20-40xx= 12.5-13 amps ... warm
3.7KV Tahmazo reno class=16-17 amps...hot
3.9KV noname B20-40xx with fin=19amps...hot during 4 minute flying no melt down ...but don't know what the heat will do to the magnet on the long run.
4.2KV Himark= 21 amps .... very hot in 10 seconds


It is really up to invidual how much current they want to drive the motor.

I am a bit conservative when it comes to the electrical limits...don't want to push the motor or the GWS blade to the extreme limits.


Cheers

[edmond22]

Hi, Edmond,
Here are some of the result 3 cells lipo with GWS 55EDF 6 paddle impeller using B20-40-xx motors :

3.2KV walkera B20-40xx= 12.5-13 amps ... warm
3.7KV Tahmazo reno class=16-17 amps...hot
3.9KV noname B20-40xx with fin=19amps...hot during 4 minute flying no melt down ...but don't know what the heat will do to the magnet on the long run.
4.2KV Himark= 21 amps .... very hot in 10 seconds


It is really up to invidual how much current they want to drive the motor.

I am a bit conservative when it comes to the electrical limits...don't want to push the motor or the GWS blade to the extreme limits.


Cheers

It is ok to be conservative mate. But you should make it clear that your tests and using what motor is showing you this and your opinion is that etc.

You can't just come in and post an expert impression that the EDF is limited to no more than 3900KV because those "limits" are your own self imposed test of how long? 10 seconds on 1 brand Himark 4200 and 1 other brand for 4 minute flying. You should just post those results instead and let people decide if it is really bad. Are you likely to even go full throttle the entire flight?

I mean seriously, you should try flying it and do a proper reading. 21 amps WOT on the ground, you ever wonder what it will be in the air when it is flying? You won't even hit 19 amps mate....

So unless you are hovering your edf or something keeping it static, you are very unlikely to cause it to go above 20 amps in the air mate.