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        Discussion 2w-18 vs 2w-20

#1 Eganwp Jul 13, 2012 03:02 AM

2w-18 vs 2w-20
 
Hey guys,

Quick question. Possibly gonna setup a Phase 3 F-16 with one of these two setups:

2w-18-v2 + wemotec mini pro
130-135mph 850w 4s

2w-20 + HET 6904
120mph 700w 4s 50a 40,000rpm


My question is, why does it seem so few people are running the 2w-18-v2 setup compared to the 2w-20? It's 10-15mph faster with only a few more amps (though I need someone to confirm numbers). Can't decide what I should do between these two setups. I fly at 3500ft ASL so my amp draw will be a little lower than most and can afford to run slightly higher efflux.

The 2w-20 setup looks to be only 7mph or so faster than the Wicked 4000+ 64mm EDO I or 5mph faster than his 4400+ 60mm EDO I setup which would save me a pile of money and is great support to Don!

Thoughts?

Thanks!
Travis

#2 sniper1 Jul 20, 2012 04:07 PM

Im glad you posted this, as i was thinking of doing the exact same thing with my F-16! I think the 2w18 is a little faster but with less flight time. Im sure one of the Australian guys on here (extreme rc) really rated the 2w18 over the 2w 20. I was even thinking of trying the Het 1w-30, but i think its a real amp hog/ battery killer and needs a 120 amp esc on 4 cells! So i'll wait to hear from the experts out there.

#3 FireHawx Oct 02, 2012 08:07 PM

I too face the same problem, PH3 F16. 2W20 or 2W18? Not as much info on the 2W18 as the 2W20. I've read from a few posts the the 2W20 has been lackluster? I just don't wanna put out the $$ and be let down at the field. I wanna go for the HET 6904 for my fan. I ran the 6404 w/a Cyclone and loved it! They have small speed edge on the Wemo?! Any more info or advice from people with these motors/fan would be great
THANX...

#4 juliant Oct 03, 2012 06:20 AM

I have used both motors on 4s though only the 2w-18 in the P3 F16. Both give great performance on 4s imo. I used the HET 3 blade Schubeler rip off fan (7103?) in the P3 F16 which I am pretty certain is a lower load, faster spinning fan than the 6904. I used this fan/motor combo as I was concerned the 2w-18 might be on the limit in the 6904 fan - it might have been fine though. It certainly should be in a Wemo. The 2w-20 is fine in the 6904 on 4s. I think either will make the F16 move along very nicely while still keeping it light enough (I used TP 2100 v2 prolites so a while ago!) to fly really nicely. Modern cells will put a bigger strain on esc and motor than my setup had to endure.

FWIW I don't believe the HET is faster than the Wemo at same power levels. For a given motor it may be as it puts a higher load on the motor. Put a hotter motor in the Wemo to get back to Het power levels and I don't think you will see any difference.

#5 sniper1 Oct 03, 2012 12:45 PM

Ok, so i put the 2w18 (6904 fan) in my F-16 and it goes like stink! 130mph to be exact. Compared to 120mph for the 2w20. It does pull more amps so you need a 80amp esc compared to a 60 amp for the 2w20. You also get less flight time. The website says the 2w18 is a hot motor and does need more throttle management.

#6 NR11 pete Oct 08, 2012 05:08 AM

I have data logged with the castle creations ice 100, my 2w18 has shown sustained 76a current draw and 1200w peaks when running a wemo fan so 80a esc is a must.

#7 tdab Oct 09, 2012 09:42 AM

Quote:

Originally Posted by sniper1 (Post 22903219)
Ok, so i put the 2w18 (6904 fan) in my F-16 and it goes like stink! 130mph to be exact. Compared to 120mph for the 2w20. It does pull more amps so you need a 80amp esc compared to a 60 amp for the 2w20. You also get less flight time. The website says the 2w18 is a hot motor and does need more throttle management.

To me (and this is just me!), Once you are going 120, I am fine! No need for 130....I am perfectly fine going 120 and not wanting more (with lower amps and slightly cheaper gear). This is the reason I went with the 2W20 and (or Dons gear as my first 4s setup in the HP F16 )....Tom

#8 sniper1 Oct 09, 2012 02:59 PM

Quote:

Originally Posted by tdab (Post 22953270)
To me (and this is just me!), Once you are going 120, I am fine! No need for 130....I am perfectly fine going 120 and not wanting more (with lower amps and slightly cheaper gear). This is the reason I went with the 2W20 and (or Dons gear as my first 4s setup in the HP F16 )....Tom

Yes you are right, to take out a 120mph set up and replace it for a 130mph set up is hardly worth the time and effort. But mine was a 100mph set up with a Dons motor, and to me (and this is just me!), was well worth the time, as you cant wipe the grin off my face after flying it!! :D

The 2w20 is the better all rounder for great power, speed and lower amps. I just know it goes 120mph in the phase 3 F-16 as my friend has one!


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