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Apr 01, 2016, 04:32 AM
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Mr. UD's Avatar
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Question

lightest (affordable) housing for 120mm EDF's?


Hello everybody,

I started to built an Aerotetris A-10 scale 1:8 (wingspan 2200mm) and bought two Jetfan 120mm EDF's for it when I found out that the bird will be pretty tail heavy with this fans.

I planed a very mild setup with a HET 700-60-1120kV (280g) @ 6s so I don't think I can save more weight on motor or controller.

The only part that might have potential to be optimized might be the EDF-housing which is pretty massive for the planned power setup.

So does anybody know a lighter but still affordable (Schübeler... are out of reach ) 120mm housing?

Thank you in advance and greetings from BY!
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Apr 01, 2016, 09:36 AM
Registered User
Hi,
JF120 with HET 700/60 ??
I donīt understand ...

These are motors for JF90 !!
For the JF120 you need HET 800

PS: i have the same kit waiting for attention ... and will also use JF120 with HET800/590kv for 12s 9000mah

Regards, George
Apr 01, 2016, 08:35 PM
shane

The Lighter EDF


Hi Mr.UD
How about 695g for one 120mm EDF include motor. whole fan are have very nice balance you don't need to do any hand work.very convenience.
Here is the running date for your reference.
Type Voltage current Thrust Power Whole weight KV

12S 44.4V 112A 7.53kg 4972.8W 695g 760KV

12S 48.0V 127A 8.62kg 6096.0W 695g 760KV

12S 50.4V 142A 9.23kg 7156.8W 695g 760KV

14S 51.8V 107A 8.15kg 5542.6W 695g 760KV

14S 56.0V 123A 9.25kg 6888.0W 695g 673KV

14S 58.8V 133A 9.80kg 7820.4W 695g 673KV

You would asking about 58.8V I think.
It comes from 4.2V/cell Lipo battery. So the battery after charged the voltage definitely have that voltage.
The factory list that information out is very very helpful for pilots to find the correct ESC and well know what that fan .
Long time ago!The factory not listed these information.So most of pilots tested and get these information at home.
Now! you don't need to test by own because the factory getting more and more professional and listing the true and important information out.
Link to check out that fan. Hope this could help you.
http://www.falconhobbysupply.com/pro...hedf12012s.htm
Last edited by EDF Shane; Apr 14, 2016 at 08:13 PM.
Apr 02, 2016, 12:18 PM
Registered User
Mr. UD's Avatar
Thread OP
Quote:
Originally Posted by GeorgeStyriaII
Hi,
JF120 with HET 700/60 ??
I donīt understand ...

These are motors for JF90 !!
For the JF120 you need HET 800

PS: i have the same kit waiting for attention ... and will also use JF120 with HET800/590kv for 12s 9000mah

Regards, George
Hallo Georg,

I bought two JF120 with HET 800-68-685kV and I dont see any chance to get the CG right - especially when trying to keep cable-length below 1000mm.

I was talking to Rainer from EJets regarding my problem. The best solution for sure would be two JF90mm - but have you seen the nacelles of the A-10 150mm would be scale - 120mm is OK but 90mm

Rainer told me he could fit the 700 into the JF120 with a shaft-adapter. The fan would turn pretty slow but should (!) produce enough thrust (Rainer has no test-data at such low rpm ) - so it is at least worth a try .

PS.: I hate unemployed parts on my shelf so i took a shot at Egors new F-16 to get one of the JF120 with HET 800-68-685kV a Job - second one is waiting - maybe I mod my HT MiG-15 or one of my FlyFly Hawk's - or Egor has to build another nice single engine plane for 120mm for me - MiG-27?
Last edited by Mr. UD; Apr 02, 2016 at 12:24 PM.
Apr 03, 2016, 05:29 AM
TeamSiam

JF-110 vs. JF-120


Hi,

just made a weight comparison of the single fans.

JF-110 PRO with the thinnest shroud is 178 gramms
JF-120 ECO as is, is 325 Gramm

Those weights are without motors.

So if we would use the same 700-xx-xxx motors, you might save 294 Gramms by using the JF-110 PRo for you plane :-)

Best greetings, Rainer
Apr 03, 2016, 06:23 AM
Registered User
Mr. UD's Avatar
Thread OP
JF110
must have missed something? where did you announce it - didnt see it on your HP???
Last edited by Mr. UD; Apr 04, 2016 at 02:11 AM.
Apr 03, 2016, 07:16 AM
TeamSiam

Jf-110 pro


Sorry for that, as i do have only 20 pcs. yet, i can't start the sale. Also there is no inlet lip available for jets till now.
We are making a carbon lip for them.

The very first requests are alway around 100 pcs. and more, if i'm presenting a new fan, so i'm waiting for the new tubes and lips to start the sales.

https://www.rcgroups.com/forums/show....php?t=2611828

BR Rainer
Apr 04, 2016, 03:07 AM
Registered User
Quote:
Originally Posted by Mr. UD
Hallo Georg,

I bought two JF120 with HET 800-68-685kV and I dont see any chance to get the CG right - especially when trying to keep cable-length below 1000mm.

I was talking to Rainer from EJets regarding my problem. The best solution for sure would be two JF90mm - but have you seen the nacelles of the A-10 150mm would be scale - 120mm is OK but 90mm
Mr. UD: what Lipos will u use?
I plan to use also 2 JetFan 120 on the A10 but before on the T50 The lipoīs (14s 9000mah) will weight 3.000g ... minimum

I donīt see problems for the CG becouse of the weight from the fans

Regards, George
Apr 05, 2016, 02:58 AM
jofro
That's what I would think, there shouldn't be any problem balancing the model with the heavy set of lipos in the nose, tho, the issue might be the extra long battery leads supplying the power to hungry power units.
Apr 08, 2016, 03:53 AM
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Mr. UD's Avatar
Thread OP
Quote:
Originally Posted by GeorgeStyriaII
Mr. UD: what Lipos will u use?
I want to realize a pretty light setup on this jet to fly scalewise (and the A-10 is no igh power Jet at all ).
So the plan is to use two 6s 4000mAh accus for the HET 700-60-1120kV's - this should result in an Amp-draw of about 90A, a power consumption of ~1,8 kW and a thrust of ~ 3-3,5 kg (per EDF).
Target weight of the whole plane is ~7 kg so thrust should be much more than required.

Quote:
Originally Posted by jofro;34445120[I
]"...tho, the issue might be the extra long battery leads supplying the power ..."[/I]
...and that's the point! Not only the power loss and the glitches, also the weight of the leads are a big problem - so every single gramm I can save in the tail would help.

The JF110 might be a solution - lets see how much they cost when available

Any other ideas of lighter housings for JF120? Asking myself if it is possible to make a CF-housing on my own

Are there 120mm EDF spare housings available? (don't want to destroy the JF120 unit just for a try) Maybe I can use the motor can/stator part and wrap a carbon-foam sandwich around it?
Apr 08, 2016, 04:31 AM
Registered User
Look for TF4000 housings
I use that housing in my JF120 with HET800/73/590 in my "GePo Blaster"

Regards, George
Apr 11, 2016, 05:04 AM
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Mr. UD's Avatar
Thread OP
Quote:
Originally Posted by EJETS-II
just made a weight comparison of the single fans.
JF-110 PRO with the thinnest shroud is 178 gramms
JF-120 ECO as is, is 325 Gramm
Hello Rainer,

if you have some 120's or 110's on the testbench in the next time: could you be kind and make a single run (of the already installed 12s (or so)-motor) on 6s to check the performance of the fans at low rpm?

At the moment every number regarding A-10 powerplant is based on extrapolation/guestimation based on your measurements at higher rpm. Theoretically efficiency would rise at lower rpm - but this doesn't take into account the design point of the fan and therefore must not be the truth

Would also be of (massive) interest how sound develops with lower rpm (12s --> 6s) - maybe you could provide a video of both runs ?

Quote:
Originally Posted by GeorgeStyriaII
Look for TF4000 housings
I use that housing in my JF120 with HET800/73/590 in my "GePo Blaster"
Couldn't find any spare-housing available on the market - not even complete EDF's The TF4000 doesn't seem to be in production anymore). Only could find some TF8000 (140mm) complete EDF's.

Thank you and greetings to AUT from BY!


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