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Old Jan 12, 2010, 09:39 AM
flimnar is offline
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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, 10:41 AM
hklagges is offline
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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
Old Jan 12, 2010, 11:04 AM
gundamnitpete is offline
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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.
Old Jan 12, 2010, 11:25 AM
Ron101 is offline
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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
Old Jan 12, 2010, 11:29 AM
Larry Dudeck is offline
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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.
Old Jan 12, 2010, 02:26 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.
Old Jan 12, 2010, 04:20 PM
SteveC68 is offline
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The HET is dynamically balanced out of the box. No balance necessary.
Old Jan 12, 2010, 04:37 PM
St. Martin is online now
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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
Old Jan 12, 2010, 05:12 PM
Arngeir Blakseth is offline
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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.
Old Jan 12, 2010, 05:15 PM
Racebelly is offline
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Originally Posted by SteveC68 View Post
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
Old Jan 12, 2010, 06:37 PM
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We also have a pretty decent 70mm fan and motor combo.

Sapacamerica.com
Last edited by pbusa1400; Jan 12, 2010 at 07:49 PM.
Old Jan 12, 2010, 06:58 PM
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Originally Posted by pbusa1400 View Post
Were also have a pretty decent 70mm fan and motor combo.

Sapacamerica.com
Good point.
Old Jan 12, 2010, 09:32 PM
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All my HET's ran smooth out of the box.
Old Jan 12, 2010, 11:26 PM
ApexAero is offline
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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
Old Jan 13, 2010, 08:01 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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