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Old Jan 12, 2010, 08:39 AM
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Best 70mm Ducted Fan Unit

I was looking to buy a Wemotec 70mm Ducated Fan unit for my F-117, but they have been out of stock everywhere for quite a while. I'm looking for recommendations for a 3s 70mm Ducted Fan. I have not found anything helpful on this topic using the search engine. Recommendations?

Thanks!
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Old Jan 12, 2010, 09:41 AM
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Quote:
Originally Posted by flimnar View Post
I was looking to buy a Wemotec 70mm Ducated Fan unit for my F-117, but they have been out of stock everywhere for quite a while. Recommendations?

Thanks!
Just an idea: Why not buy them directly from the man at www.wemotec.com? That's where I bought 2 sets of 2 fans each from, including HET engines, all balanced by Mr. Wemotec himself.

Cheers,
Henrik
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Old Jan 12, 2010, 10:04 AM
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The shipping charges make it come out to alot more than you would pay from a vendor.

The HET 6904 is a good alternative, aswell as the wm400 mk2.

If you are using 3S, a HET 2W motor is a good choice. Around 400-500 watts depending on batteries.
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Old Jan 12, 2010, 10:25 AM
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everyone recomended the HET 6904 to me
and I'm super happy with it.. silky smooth and has a nice sound

great performance! I'm running the 1112 1y neu motor on 4s 35c 4200
for 1300 watts
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Old Jan 12, 2010, 10:29 AM
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If you don't already have batteries, opt for 4S, The WM400/HET3W is a good economical system on 4S ~ 450 watts at 32 amps for less expensive ESC, longer flight times.
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Old Jan 12, 2010, 01:26 PM
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I've used the Wemo and HET's. Both are great fans. But, the new MF Pro impellers are very smooth and quite right out of the box. I think the power is a little less than the HET's. But, there's no balancing and they just sound so good.

As mentioned, on 3s the HET 2W or Mega 2T's are great motors.
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Old Jan 12, 2010, 03:20 PM
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The HET is dynamically balanced out of the box. No balance necessary.
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Old Jan 12, 2010, 03:37 PM
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If you want a little flexability in cell counts, any of the fans mentioned, and the ARC 28-47-1. 650-700W on a 3000 3s. Or 1200-1400W on a 4000 4s. Get a cool clamp for the 4s.

Fuzz
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Old Jan 12, 2010, 04:12 PM
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Quote:
Originally Posted by SteveC68 View Post
The HET is dynamically balanced out of the box. No balance necessary.
I've not been so happy with them, all 3 I have needed quite a bit of work to run smoothly.
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Old Jan 12, 2010, 04:15 PM
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Quote:
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The HET is dynamically balanced out of the box. No balance necessary.
I haven't bought an HET in awhile. I didn't know they came pre-balanced now. That's great.

The only problem I did have once with the HET was the collet adapter came loose on me. Luckily it was on a test run-up and not in-flight. In fact that was the HET fan I put a Wemo Pro rotor in. In my Hawk it is so quite and smooth.


-Mark
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Old Jan 12, 2010, 05:37 PM
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We also have a pretty decent 70mm fan and motor combo.

Sapacamerica.com
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Old Jan 12, 2010, 05:58 PM
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Quote:
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Were also have a pretty decent 70mm fan and motor combo.

Sapacamerica.com
Good point.
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Old Jan 12, 2010, 08:32 PM
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All my HET's ran smooth out of the box.
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Old Jan 12, 2010, 10:26 PM
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Just beware of your motor purchase and the shaft size requirement of your fan choice.
I chose the Het 6904/ARC 28-47-1
best bang for the buck imho
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Old Jan 13, 2010, 07:01 AM
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I haven't seen any votes for the Lander/Fury metal housing fans? Are there any obvious performance negatives versus the Wemo, WM, HET units? I am running three of the 70mm Lander units (4-cell) and am quite satisfied but am I missing something (Also have some Wemo and Sapac units)? I do not look for Mach 2 performance in any of my models but might not have the optimum fan/motor combo.
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