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Nov 19, 2012, 01:17 PM
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erh7771's Avatar
Quote:
Originally Posted by MRGTX
Nothing is cooler than a super quiet EDF, IMO.
It's tempting to put something in the exhaust stream to make even more "wooosh" but that's the model airplane equivelant of putting a baseball card in the spokes of your bicycle...and probably tacky. ...
You might be on to something...

I would guess a flat piece of foam in the middle of a large intake cavity would produce a lot of turbulence, increase the white noise sound and not effect performance that much if it's far enough away from the fans intake
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Nov 19, 2012, 03:44 PM
Registered User
Quote:
Originally Posted by erh7771
You might be on to something...

I would guess a flat piece of foam in the middle of a large intake cavity would produce a lot of turbulence, increase the white noise sound and not effect performance that much if it's far enough away from the fans intake
more details please.
how far ahead of the fan should the foam piece be?
how big is that piece of foam?
photos would be wonderful :-)

Usually 10 + blade fan means heavy set up and waste energy for the white sound. But I love a good light weight set up of a lesser blade fan, and some white noise by placing flat foam piece, in front or behind the fan and still have light weight and efficient system

thanks
Nov 23, 2012, 02:38 AM
Registered User
limodune's Avatar
I have ordered a couple of these, I am going to swap them out for the 10 blade fan's I have in my airliner that got damaged blades, I know they will look better but will see what performance difference there is good or bad

Mike
Nov 23, 2012, 07:46 AM
Registered User
I did the foam in thrust tube idea woth the 10 blade. It doesnt add a huge amount of noise at least with the one i did
Nov 23, 2012, 11:42 AM
Registered User
Alpha10's Avatar
Definitely looking forward to the differences... I'm hoping for more thrust and slightly less draw with the new design.
Nov 23, 2012, 04:07 PM
FireHawx
FireHawx's Avatar
Just got mine today and it seems to be made well. I ran it up on my 2W20 and it was pretty smooth outta the box! The adapter has 4 small hex bolts to attach it too the shaft and not 2 as on usuall fans. The shroud seems to be of fair quality also. I do not have the 10 blade to make a comparision too and my watt meter is currenty in the mail from HK so this is about all the fair feedback I can provide as of right now, Oh the shipping was quick from X-flite also! I hope to see more info on the thread as people get their fans, it looks to have potential.
Nov 23, 2012, 04:28 PM
Registered User
limodune's Avatar
Quote:
Originally Posted by Alpha10
Definitely looking forward to the differences... I'm hoping for more thrust and slightly less draw with the new design.
Dito
Nov 23, 2012, 06:22 PM
Lee Liddle
Knife Liddle's Avatar
Removing 6 blades might be something to look at. Maybe if someone breaks one blade off they can use it as a test rotor.
Nov 23, 2012, 08:39 PM
Registered User
Quote:
Originally Posted by Knife Liddle
Removing 6 blades might be something to look at. Maybe if someone breaks one blade off they can use it as a test rotor.

I actually broke off one blade by accident on a 70mm CS10 several months ago. So after some cursing, I broke off the adjacent blade on the opposite end to make it an 8blade unit. Runs fine, although a bit noisier than before.
Nov 23, 2012, 10:20 PM
crashing build's character.
has anybody done testing like amp draw 10vs12 blade?
Nov 23, 2012, 10:23 PM
Registered User
this fan just came out this month, it will be a few weeks before tests are done.
Nov 24, 2012, 12:42 AM
Registered User
I noticed the quoted rpm limit is a lot higher with the 12 blade @52000 rpm vs 45000 for the 10 blade
Nov 24, 2012, 06:40 AM
FireHawx
FireHawx's Avatar
It's going to take some power to hit 52000rpm!!!! I ran it up a few times on my Cyclone 3300 and the fan it pulled off the shaft. I only used 2 of the grub screws to attach it to the shaft on the first run up. So needless to say it needs all 4!! Solid power on the run up's but I will need a lower KV...
Nov 24, 2012, 09:56 AM
Registered User
What size batt where you using
Nov 24, 2012, 11:33 AM
FireHawx
FireHawx's Avatar
Turnigy 3000 4S 25C....It needs more punch I know!!


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