Electric RC Jets Discuss rc electric ducted fan or radio control prop jets here.

the cone info

Old 09-03-2012, 05:33 AM
Thread Starter
Join Date: Jan 2003
Location: tomsriver, NJ
Posts: 465
My Gallery
My Models
My Feedback
Default the cone info

i have a rdf unit and making my own set up.heres the ? .i will be useing a cup for the cone,its tamered so does the small end gos where........less of of a hole or more of a hole i guess is the ?....thanks
handyman is offline  
Reply With Quote
Old 09-08-2012, 09:10 PM
Join Date: Mar 2009
Location: Hermantown, MN
Posts: 77
My Gallery
My Models
My Feedback
Default RE: the cone info

Rule of thumb says, thrust tube exit (small dia.) is equal to approx 85% fan FSA(Fan Sweep Area) Just measure the inside dia of fan shroud, and the outside dia of motor tube, plug the numbers into the calc and will give you the right dia for your "cup"

Keep in mind 85% is only the average, it all depends on the plane you have, the size of the fan. You may have to experiment a touch, but only a mm at atime. The bigger the exit, more thrust , less speed. Smaller exit more speed, less thrust. What size plane and weight is it? Also, what size fan 70mm-90mm? Other? Motor Kv and battery size will also make a difference.

If you plan on just slapping any old fan and motor in it, results may vary. All components need to compliment each other to get best performance.
Attached Files
File Type: xls
Om34594.xls (20.0 KB, 11 views)
CoolerByTheLake is offline  
Reply With Quote

Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -8. The time now is 06:52 PM.