HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Mar 05, 2012, 05:27 PM
Registered User
SKYRYDER1000's Avatar
NEW JERSEY U.S.A.
Joined Mar 2010
494 Posts
Maybe some of you can give me your opinion on the best motor to use with a 3300mah 4s 40-80c pack and CS fan?

Long story short.. I have the turnigy motor already and the tacon motor is in route from HP. I just can't make up my mind.. Any thoughts?



Turnigy L2226-3000kv
4S 25C
Vm: 14.3
Ap: 66.38
Wp: 949.8
Thrust(kg): 1.51
g/w: 1.59

Or

Tacon 2858-2618kv
4S 30C
Vm 15.00
Ap 60.00
Ws 778.0
Thrust(kg) 1.47
*g/w: 1.89
SKYRYDER1000 is offline Find More Posts by SKYRYDER1000
Last edited by SKYRYDER1000; Mar 05, 2012 at 05:35 PM.
Reply With Quote
Sign up now
to remove ads between posts
Old Mar 05, 2012, 06:24 PM
Registered User
Joined Oct 2011
152 Posts
Quote:
Originally Posted by SKYRYDER1000 View Post
Maybe some of you can give me your opinion on the best motor to use with a 3300mah 4s 40-80c pack and CS fan?

Long story short.. I have the turnigy motor already and the tacon motor is in route from HP. I just can't make up my mind.. Any thoughts?



Turnigy L2226-3000kv
4S 25C
Vm: 14.3
Ap: 66.38
Wp: 949.8
Thrust(kg): 1.51
g/w: 1.59

Or

Tacon 2858-2618kv
4S 30C
Vm 15.00
Ap 60.00
Ws 778.0
Thrust(kg) 1.47
*g/w: 1.89
Looking at the data I would expect more headroom with the Tacon motor for 4 & 5S operation.
901racer is offline Find More Posts by 901racer
Reply With Quote
Old Mar 05, 2012, 09:12 PM
Kamikaze Ace
Glacier Girl's Avatar
USA, FL, Lakeland
Joined Jan 2010
2,358 Posts
Well fan clearance is just a hair over 1/16" on the fans to the WeMo shrouds, and throttle range has been checked (I had thought about that too) even maxed out didn't change it.

I'd be blaming the esc settings, but these motors were slugs to begin with, with the 6904 fans. I'm really beginning to doubt the kv ratings. I did a little digging and I find the motor is listed either as a 2980 kv or a 3020. With the watts and amps I'm getting, compared to the tested ones on the chart, it looks like more like somewhere around 2400 kv.

Got me. I just wish HK would get some 2100 or 2300's in. Least I know those will work.
Glacier Girl is offline Find More Posts by Glacier Girl
Reply With Quote
Old Mar 05, 2012, 11:30 PM
Fly it like you stole it !
bobbit4447's Avatar
Australia, QLD, Coolum Beach
Joined Oct 2011
372 Posts
Quote:
Originally Posted by clive45 View Post
What you must realize is that the static fins in the shroud are different in some cases to those of the CS10. If it has been designed correctly the shape and angle are correct only for that fan, so putting a CS10 blade fan in a Sapac may not be as efficient as it should be. From what I gather its to do with controlling swirl angles from the moving blades and getting the best straight flow of air out the back.
All parts are not equal......also what about tip space is that the same for both fans?
Clive ....to elaborate.
The air stream exits the blade area rotating in the same direction as the fan wheel. The guide vanes attempt to change the airflow to nearer axial to improve efficiency. Generally fan manufacturers settle on a particular guide vane configuration irrespective what fan "species" they supply.
Its probably not too important from an airflow viewpoint...what is important there be a different number of guide vanes to the number of fan blades otherwise sound resonance will be set up at blade passing frequency.

Tip clearance needs to be smaller as developed pressure increases.
A low pressure fan like an "Expelair" wall type has a huge clearance to maximize efficiency.
A high pressure fan has a small clearance to minimize "leakage" downstream to upstream. In the case of our EDF's it would be best to have as small a gap as reasonably possible without risking blades touching.

Bob
bobbit4447 is offline Find More Posts by bobbit4447
Reply With Quote
Old Mar 06, 2012, 12:02 AM
It should fly at least once
clive45's Avatar
Australia, NSW, Grenfell
Joined Mar 2006
2,567 Posts
I agree with you re the tip clearance and the number of static vanes but I was under the impression that the number and angle of them was critical to efficiency as well. Anyway its all fluid mechanics which is way above my head but I would think that certain fans will work well or better in some shrouds than others and some worse. Just got to find the best combination.
Tamjets talks about this subject on one of his vids...........
clive45 is online now Find More Posts by clive45
Reply With Quote
Old Mar 06, 2012, 12:13 AM
Registered User
manuel v's Avatar
Mexico, BC, Mexicali
Joined Aug 2004
5,073 Posts
Someone Test this DF with only 5 blades?


Manuel V.
manuel v is online now Find More Posts by manuel v
Reply With Quote
Old Mar 06, 2012, 12:52 AM
Extreme CNC Alloy EDF
Extreme_RC's Avatar
Australia
Joined Mar 2006
11,461 Posts
Might as well run a minifan if you going to remove half the blades!
Extreme_RC is offline Find More Posts by Extreme_RC
Reply With Quote
Old Mar 06, 2012, 08:45 AM
I make bad look so good.
SteveC68's Avatar
League City, Texas
Joined Sep 2006
2,512 Posts
Quote:
Originally Posted by Extreme_RC View Post
I will have them available soon as I can get round to finish machining the first batch sometime this week.
Good deal. Can you post when these are available?

Thanks,
Steve
SteveC68 is offline Find More Posts by SteveC68
Reply With Quote
Old Mar 06, 2012, 08:45 AM
I make bad look so good.
SteveC68's Avatar
League City, Texas
Joined Sep 2006
2,512 Posts
Quote:
Originally Posted by manuel v View Post
Someone Test this DF with only 5 blades?

Manuel V.
No I think they are talking about 5 stator blades.
SteveC68 is offline Find More Posts by SteveC68
Reply With Quote
Old Mar 06, 2012, 01:44 PM
Registered User
Puerto Rico, MayagŁez
Joined Jan 2011
57 Posts
Hi, has anyone used this fan on a eflite bae hawk or f-86 sabre?
Because a friend of mine gave both of them to me, but without the power system. This fan sounds great but I don't know if it would be enough, and if so, with what kv motor? I have read through this thread looking for some guidance...
HARD DRYVE is offline Find More Posts by HARD DRYVE
Reply With Quote
Old Mar 06, 2012, 02:29 PM
Registered User
Joined Feb 2006
2,384 Posts
hi guys I have a question. I have a himax ha2825-3600kv

Motor, how do you guys feel this on the cs10 blade fan?? I know this motor runs the multiplex twister pretty good but not that fast on 3s, I tried 4s once long time ago and it fried the motor, but im thinking on 3s cs10blade fan it should be pretty good?? Please let me know before I even try to mess with it.
sherlockshah is offline Find More Posts by sherlockshah
Reply With Quote
Old Mar 06, 2012, 02:45 PM
Registered User
therealhiphop's Avatar
USA, UT, Springville
Joined Dec 2005
1,877 Posts
Quote:
Originally Posted by sherlockshah View Post
Motor, how do you guys feel this on the cs10 blade fan?? I know this motor runs the multiplex twister pretty good but not that fast on 3s, I tried 4s once long time ago and it fried the motor, but im thinking on 3s cs10blade fan it should be pretty good?? Please let me know before I even try to mess with it.
Kv is way too high. Maybe 3S?

Try it, measure the numbers, post the results. Contribute!
therealhiphop is offline Find More Posts by therealhiphop
Last edited by therealhiphop; Mar 06, 2012 at 04:50 PM.
Reply With Quote
Old Mar 06, 2012, 02:53 PM
Registered User
Joined Feb 2006
2,384 Posts
thats what im asking how do you guys think it will be on 3s

on 4s the motor burns with the 5 blade, if you dont do the cooling ring etc.. but im thinking 3s on the 10blade what you guys think?
sherlockshah is offline Find More Posts by sherlockshah
Reply With Quote
Old Mar 06, 2012, 04:43 PM
3DHOG
jcdfrd's Avatar
USA, CA, Aromas
Joined Sep 2010
4,835 Posts
it might taxi good
jcdfrd is offline Find More Posts by jcdfrd
Reply With Quote
Old Mar 06, 2012, 06:12 PM
Registered User
Joined Feb 2006
2,384 Posts
they showing the F-22 flying with 3s 5000mah 3500kv

motor. SO i know it will fly but not sure what fan they were using. Can someone calculate or show me how to calculate the numbers based on 3600kv on 3s with this 10blade fan?
sherlockshah is offline Find More Posts by sherlockshah
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
New Product Change Sun 12 blade 90mm Flip Flop Electric Ducted Fan Jet Talk 7081 Jul 28, 2014 08:25 AM
New Product Change Sun 120mm and new 10 blade 70mm fans Flip Flop Electric Ducted Fan Jet Talk 131 Apr 27, 2012 07:07 PM
Sold Change Sun electric retracts Flip Flop Aircraft - Electric - Jets (FS/W) 3 May 23, 2011 06:20 AM
Sold Change Sun Electronic retracts w/Lander struts hole digger Aircraft - Electric - Jets (FS/W) 2 May 06, 2011 01:27 PM
Sold Change Sun Electric retracts NIB 75.00 jzuniga Aircraft - Electric - Jets (FS/W) 2 Sep 03, 2010 09:36 AM