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Best 70mm EDF Combo

Old 03-25-2009, 09:03 AM
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Default Best 70mm EDF Combo

Whats the best 70mm EDF Unit, Motor, Esc & battery setup? Looking for performance, reliability and cost. Trying to go with no more than 6 cells, preferably less. Been looking at an HET Super Sniper and I want to go fast.
Old 03-25-2009, 09:42 AM
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Default RE: Best 70mm EDF Combo

The HET fans and motors are decent, no complains. Pretty good value for money. I think on 4S the Super Sniper will be fast. She is small and sleek. You can try 6 but the wing loading goes up and balancing becomes an issue. Again, how fast is fast?

4S set up

Motor - HET 2W-20
Fan - HET 6904
ESC - Turnigy 60A/80A

The above set up is not too expensive and gives you decent performance for sure.
Old 04-06-2009, 07:58 PM
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Default RE: Best 70mm EDF Combo

There's also the Eflite BL15 motor coupled w/ the Delta V DF unit. It reportedly puts out over 2 1/2 pounds of thrust w/ 4cells! Wonder how this compares to the HET 2W-20 since I'm thinking of maybe upgrading from the stock fan unit in my Exceed F/A-18C?


1) BL15 Ducted Fan Motor, 3600Kv [#EFLM3015DF] $79.99


2) Delta-V 15 69mm EDF [#EFLDF15] $29.99


3) 60-Amp Pro Switch-Mode BEC Brushless ESC [#EFLA1060] $84.99
Old 04-06-2009, 08:49 PM
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Default RE: Best 70mm EDF Combo

This one from Hoffman Magnetics is the coolest 70 mm EDF I've ever seen. I saw it run at Toledo and it sounds like a turbine. It is not cheap but it is really sweet.

They were running it on a 4S 3700 pack and I believe it puts out 3.7 lbs. of thrust. Over 4 lb. on 5S.

http://www.hoffmanmagnetics.com/

Scott

www.ModelAero.com
Old 04-07-2009, 07:24 AM
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Default RE: Best 70mm EDF Combo

The laders EDF's are really nice they have a large selection. Mike

http://www.ejf.com/index.php?main_pa...roducts_id=708

http://www.ejf.com/index.php?main_pa...roducts_id=707

http://www.ejf.com/index.php?main_pa...roducts_id=621
Old 05-28-2009, 08:36 PM
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Default RE: Best 70mm EDF Combo



   got to go with the hoffman magnetics "storm 70" </p>

  tp. 3850 30C 5S</p>

  CC phoenix 125 </p>

 it will be fast!!!!</p>
Old 05-28-2009, 10:40 PM
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Default RE: Best 70mm EDF Combo

<span style="font-size: larger;"><span style="font-family: Comic Sans MS;">The Hoffman motors look great but only so called drawback is cost and power consumption ... the thrust figures look so darn good. This baby needs 30C batts for sure.Anyone knows how many RPMs its giving at 4S or 5S?</span></span>
Old 05-29-2009, 07:57 AM
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Default RE: Best 70mm EDF Combo

I see several testimonials for Hoffman Magnetics. I've seen their ads and it looks impressive. Any reports from someone who has actuially flown one?

Joe
Old 05-29-2009, 06:58 PM
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Default RE: Best 70mm EDF Combo

I had a hoffman beast with a HET 6904 fan system and it was a monster! Awesome performance and thrust, but the airframe that I had it installed in couldn't do it any justice. The setup was in a HL F-16 and the airframe just had too much drag. Speeds were in the low 100's in straight level flight, but it was a battery slayer for sure. I was using TP 3850 4 cells and mixed throttle flight was only good for just a hair over 4 minutes, but it was a wild 4 minutes. Amp loads were spiking over 112 amps and would settle to 91 amps after a couple of seconds with over 1200 watts of input. I loved the motor but hated the power demands. I changed it out for an inrunner and dropped my amp load to 61 amps and lost about 10 mph off the top end. It was kinda like having an olds rocket engine in a chevette, was cool but it cost too much to fill the tank for that short stoplight to stoplight run.
Old 05-30-2009, 02:27 AM
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Default RE: Best 70mm EDF Combo

So its confirmed that the Hoffman is a real 30C sort of motor. Sounds like fun for my Twister, I still have a 120A ESC for 6S. Hmmmm ... now to look for batts before I take the plunge.
Old 06-03-2009, 06:21 PM
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Default RE: Best 70mm EDF Combo

I just received my RC Lander aluminum 68 mm EDF today and it is one sweet piece of metal. I went with the 3S set-up for a special project and am looking forward to running it. It will put out 40-42 oz. of thrust @ 55 amps. I will be using an Hyperion G3 VX 3300 pack.

Scott

www.ModelAero.com


Old 07-08-2009, 05:09 PM
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Default RE: Best 70mm EDF Combo

Be careful with the E-Flite Delta-V 15!!!!!! The blades are not factory balanced and are very brittle.

I assembled one with no problems, got it in the model, and found that the words "factory" and "balanced" don't apply to this fan. Attempting to pull the fan for balancing, I break a blade. I order a new fan (out of balance, of course) balance it, and attempt to put it in the jet. Barely putting any pressure on the blades, I snap another one. So far I'm out close to $50 and I can't even get the d[:@][:@]m thing assembled. I contacted Horizon and a new rotor is on the way. I'm kicking myself for not checking the balance before I installed it in the jet (I can't pull the whole fan). I put myself in a bad situation because I took for granted that the blade was balanced as Horizon claimed.

If anyone has any suggestions on how to install the rotor on an inrunner with nothing to grab on to, let me know.
Old 07-14-2009, 12:46 PM
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Default RE: Best 70mm EDF Combo

I have the Aluminum 68mm ducted fan and need to add a motor to it but having problems finding one. I looked at the Hoffman but it is a beast like it say's and requires a  120amp ESC. I need something that turns at about 47,000 RPM. Anyone have a good one that will work with this?? I've asked on the forum before but never get a response.
Old 07-17-2009, 10:14 AM
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Default RE: Best 70mm EDF Combo

I went with this in my RC-Lander F-16D

<u>RCLander 3575KV Brushless Inrunner Motor

Emax 60amp Electric Speed Controller ESC

Aluminum Alloy 68mm EDF

</u>
Old 01-25-2011, 05:09 PM
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Default RE: Best 70mm EDF Combo

OK Guys,

Does anyone have the correct C.G. location on the F-16D from RC Lander? I'll be using a 14.8v 3300mah lipo.. Factory says it's 110-115 mm from the L.E. Seems like there are conflicting reports on this model.. Any help would be great..

Thanks,


Greg
Old 01-27-2011, 08:51 AM
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Default RE: Best 70mm EDF Combo



How fast?

Venom international makes a great F-86 combo that includes:
Air retracts
70mm fan/motor
Operational scale airbrakes
Operational flaps
60amp speed control
All servos preinstalled

All for $280, I have this plane and love it...it is more scale speed that superfast but it really flies and handles well. 
</p>
Old 01-27-2011, 03:18 PM
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Default RE: Best 70mm EDF Combo

Hi There,

I was wondering if you have the correct C.G. location on the F-16D?Factory is saying 100mm-115mm from the L.E.? Any help would be great!

Thanks,

Greg
Old 01-28-2011, 02:16 AM
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Default RE: Best 70mm EDF Combo

Lander Factory CG was wrong, 100mm max, 90mm is better to start with. All their models had incorrect CG, Panther was dangerous with the factory CG, had to move it 20mm forward. F16 flew around at high alfa with factory CG, very hard to control, moved it forward 20mm. Then the Hunter came out and was so far forward it wasnt funny, had to move it 40mm back!! I gave up after that, so dunno how the MIG17 was for CG.

Hoffmann motors lasted all of what, 6 months?? Says everything about them. I saw one in a twister on 4 cells, crazy amp draw and hardly any faster than the 2W20/6904 setup that was removed. There are a lot better choices out there, the ARC2848-1 is a great 4 cell motor for 70mm fans, in the Midi its a perfect balance at 90A with the same sort of RPM that the other motors were doing at 110A...

The HET2W18-V2 in the wemo fan is a superb 850-900 watt 4 cell setup, in the little F16 it does 135mph+ and sounds sweet as, pulls 60A and can be flown with good 2600mah packs. Watts mean nothing, RPM is where its at, unless you know what RPM you are getting, saying your setup pulls 1500w is meaningless, someone else could have a setup that does the same RPM as yours at only 1200 watts...
Old 01-28-2011, 09:07 PM
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Default RE: Best 70mm EDF Combo

Cool !! Thanks for the info !!! Might have a better chance on my maiden now !!!!!

Regards,

Greg
Old 01-31-2011, 04:52 PM
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Default RE: Best 70mm EDF Combo

If anyone is interested in a nice set of micro retracts for their EDF I have a set for sale.

http://www.rcuniverse.com/market/item.cfm?itemID=715879

Thanks,
Mike
Old 02-01-2011, 03:32 PM
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Default RE: Best 70mm EDF Combo

[link]http://www.extremerc.com.au/estore/index.php?main_page=product_info&cPath=146_11_195& products_id=803[/link]
Old 02-11-2011, 12:41 AM
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Default RE: Best 70mm EDF Combo

We have many new products on our website. Please visit us for quality EDF products.
http://www.effluxrc.com

Thanks, Gary
Old 02-11-2011, 03:51 PM
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Default RE: Best 70mm EDF Combo

"Green eggs and Ham" LOL

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