Super Habu - 120mm EDF - Parkjetdesign - Page 6 - RC Groups
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Dec 12, 2012, 12:50 AM
Team30 Micro EDF
NitroCharged's Avatar
I have thoroughly enjoyed following this thread since the first post Humbertomelo!

Fantastic build log and progress.

I wish you the best of luck with the maiden!
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Dec 12, 2012, 12:43 PM
Registered User
CoolerByTheLake, you are right! I did a quick test here and guess what, the blades has broke in thousand pieces, che*t ! Too fragile this CS 12 blade EDF... I did the static balancing before running the EDF for hours and get the maximum balancing point... well, not enough. I have one spare EDF, let's try again...

The super habu has become a big one jet, 90mm EDF are off the table, did order a new 120mm EDF, 4 blades, 5000w motor...

Turnigy C580L-870 Brushless Inrunner EDF Motor

High-Performance 4 Blade 120mm EDF Unit
Last edited by humbertomelo; Dec 14, 2012 at 06:09 AM.
Dec 12, 2012, 12:48 PM
Registered User
alexandermh's Avatar
Sorry to hear that. There is an entire thread on RCGroups Electric Ducted Fan Jet Talk on this fan, which contains a number of tips to keeping this fan together. If you haven't already, you should check it out.
Dec 12, 2012, 01:38 PM
Do it Right, the first time!
CoolerByTheLake's Avatar
That CS fan is just not meant for high power, they just expolde. I have the JetFan 90 for my build. Mine will be smaller than yours, so I think 3000W+ (Het 700-68-1680KV 8s, could also use there 1500KV) will be more than enough. If the weight comes out close to what I am shooting for, that's over 300/W lb.

Just glad you found out before doing damage, or totaling the plane.

I would say that the JetFan 90 with the right motor would fly your Habu very nicely.
Dec 12, 2012, 03:03 PM
Registered User
OK, i think 90mm are good for 3000g to 4000g jets, this big Habu reaches 5500g, i need a bigger EDF.
Dec 12, 2012, 04:18 PM
Do it Right, the first time!
CoolerByTheLake's Avatar
humbertomelo You may change your mind after seeing this video. His plane weighs 16lb or 7257g. You be the judge!

My F-86F will weigh about 15lb/6800g and I will be using the JF90.
Dec 13, 2012, 10:31 PM
Registered User
CoolerByTheLake, It seems a very good setup. I have one here very similar in numbers:
CS 5 blades 90mm EDF, 140a and 3100 watts at Max power, 8s Lipo 40c,

D_FAST, It looks like a great EDF!

Let's try on this Saturday... :-)
Dec 14, 2012, 12:14 AM
Registered User
Better for fan to blow on ground than in air
Dec 15, 2012, 12:44 AM
Do it Right, the first time!
CoolerByTheLake's Avatar
Originally Posted by humbertomelo
Weight specs

Fuselage: 2200g
Lipos: 1400g
Servos, EDF, Speed: 600g

Total: 4200g
humbertomelo Does the 2200g include ALL the flying surfaces, too?
Dec 15, 2012, 08:35 AM
Registered User

2200g was a weight estimative, the final weights are:

Lipos: 1380g for 12s and 920g for 8s
Fuselage with electronics: 4120g
Total: 5500g
Last edited by humbertomelo; Dec 16, 2012 at 07:21 AM.
Dec 15, 2012, 10:51 AM
Do it Right, the first time!
CoolerByTheLake's Avatar
humbertomelo thanks for taking the time to answer my questions. It has been very helpfull. I am still in the planning stages, but I did notice that your Habu and
my project have the same Length vs WS ratio, 6/5. Mine will be 1/6th smaller at 60"Length, WS 50". By using the various numbers you have provided, I am failry confident I can come up with an AUW of around 9lb/4082g with an estimated thrust of 4.2-4.3Kg.

Now all I need is lots of practice in your foam bending technics. I am sure there will be many mistakes!!!

You have taken the next step in the evolution of building with foam.

Can't wait to see the maiden video.
Dec 16, 2012, 01:22 AM
efflux RC's Avatar
This fan produces 9.9 lbs static on the bench, on 9s. I didn't get the thrust on 10s, but she flies on 10s now. My Habu 32 weighs approx 8.5 lbs.
It's faster than P-20 power in this airframe.
The motor is a HET 700-68-1680 with a CC ICE2 120HV

The video is on 4000mAH, but 5000's will be in there shortly.
This setup should fly many 90mm birds nicely, at a nice little weight savings. Something to consider.

Las Vegas 2012 Habu 32 demo (4 min 30 sec)
Latest blog entry: Updated blog - Oct 2017
Dec 17, 2012, 06:31 AM
Registered User
efflux RC,

Sure, the 90mm habu with efflux edf and Het motor are a great combination! but i need a sponsor to get one efflux EDF :-) are u interested?
Dec 19, 2012, 06:44 AM
it wasn't me flying that plane
Hover or die's Avatar
On bending the depron......
If you can find a good place to lay your heat gun (i use an old shirt to keep it still on my work surface) and use 2 hands to work the foam passing it back and forth in front of the heat you will have good luck...Its a little harder to hold the gun andfoam to work it into the bend you desire...
Just try not to leave the hot air in one place for long or it will ruin the piece..
Another cool trick is if you get the bend to tight you just add heat again and the foam will open right back up on its own if no force is beiing applied to any of the sides...
Its very cool when you get a piece bent perfect and it fits right in the spot you are trying to cover...
Take care all..............Chris

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