New Products Flash Sale
Thread Tools
Old Jan 10, 2016, 06:51 AM
PeterVRC is online now
Find More Posts by PeterVRC
Registered User
Australia, VIC, Melbourne
Joined Nov 2006
14,623 Posts
The Meteor exhaust diameter is already over-size for a 70mm fan. eg 100% region.
PeterVRC is online now Find More Posts by PeterVRC
Reply With Quote
Sign up now
to remove ads between posts
Old Jan 11, 2016, 01:52 AM
gooniac33 is offline
Find More Posts by gooniac33
Registered User
gooniac33's Avatar
Sunnyvale
Joined Feb 2009
5,896 Posts
Quote:
Originally Posted by PeterVRC View Post
The Meteor exhaust diameter is already over-size for a 70mm fan. eg 100% region.
No not quite... I got it measured today... it is 64mm... so that is just barely going to work... but it will work!! I got mine ordered and have a nice 11 blade 6s set up coming....
gooniac33 is offline Find More Posts by gooniac33
Reply With Quote
Old Jan 11, 2016, 01:56 AM
PeterVRC is online now
Find More Posts by PeterVRC
Registered User
Australia, VIC, Melbourne
Joined Nov 2006
14,623 Posts
FSA for 70mm is 60mm
'normal' fans use/need about 54mm.... CS10 etc 60mm
PeterVRC is online now Find More Posts by PeterVRC
Reply With Quote
Old Jan 11, 2016, 10:42 AM
gooniac33 is offline
Find More Posts by gooniac33
Registered User
gooniac33's Avatar
Sunnyvale
Joined Feb 2009
5,896 Posts
Quote:
Originally Posted by PeterVRC View Post
FSA for 70mm is 60mm
'normal' fans use/need about 54mm.... CS10 etc 60mm
That is the FSA for fans with 8 blades or less... Once you go up in blade count you need to give them a little more. In my own experience when you go below 90% you make the fans stall... I will for sure be posting videos once I get mine up and running... Over the last couple years my 10 and 12 blades have taught me a lot! I have a couple that sound a lot like turbines now! I will post when I get it going...
gooniac33 is offline Find More Posts by gooniac33
Reply With Quote
Old Jan 11, 2016, 05:27 PM
PeterVRC is online now
Find More Posts by PeterVRC
Registered User
Australia, VIC, Melbourne
Joined Nov 2006
14,623 Posts
No... the AREA of a fan's blades section is the FSA. The full swept area of the blades... no matter what fan it is.
Then there is how much percentage of FSA suits the fans best.
"Low blade area to gap ratio" fans only need about 75% FSA. That is approx 54mm diameter.
"High blade arera to gap ratio" fans (like CS10,12, XRP12, 13,14 etc) are best at close to 100% FSA. That is 61mm diameter.

That 100% FSA is 61mm diameter of a 'tube' (typical exhaust outlet) - but you can run them (CS10 etc) down to near 58mm ok too.
And 54mm region for the other fans (for that 75% FSA).
PeterVRC is online now Find More Posts by PeterVRC
Last edited by PeterVRC; Jan 12, 2016 at 05:17 PM.
Reply With Quote
Old Jan 12, 2016, 04:12 PM
gooniac33 is offline
Find More Posts by gooniac33
Registered User
gooniac33's Avatar
Sunnyvale
Joined Feb 2009
5,896 Posts
Quote:
Originally Posted by PeterVRC View Post
No... the AREA of a fan's blades section is the FSA. The full swept area of the blades... no matter what fan it is.
Then there is how much percentage of FSA suits the fans best.
"Low blade area to gap ratio" fans only need about 75% FSA. That is approx 54mm diameter.
"High blade arera to gap ratio" fans (like CS10,12, XRP123,14 etc) are bet at close to 100% FSA. That is 61mm diameter.

That 100% FSA is 61mm diameter of a 'tube' (typical exhaust outlet) - nut you can run them down to near 58mm ok too.
And 54mm region for the other fans (for that 75% FSA).
I must be talking about something different then.... I will let you know about the results I get... thanks for the info!!
gooniac33 is offline Find More Posts by gooniac33
Reply With Quote


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold Larry Jolly "Meteor"-127" Kit NIB --Now $275 Shipped ldm1839 Aircraft - Sailplanes (FS/W) 5 Sep 29, 2010 06:34 PM
Discussion Meteor shower tonite, You goonna stay up for it? Bilbobaker Life, The Universe, and Politics 13 Aug 16, 2010 12:32 AM
Build Log Peter Rake's 30" General Western Meteor Prototype dz1sfb Scale Kit/Scratch Built 19 Aug 15, 2010 11:38 PM
Discussion Two Hours Outside and I only Saw One Perseid Meteor Chophop Life, The Universe, and Politics 12 Aug 12, 2010 08:28 PM
For Sale Russ Thompson Meteor fuse Bill L Aircraft - Sailplanes (FS/W) 0 Oct 15, 2009 10:18 PM