Sport Flying This forum is for those that like to fly just for the enjoyment of flying, and all the airplanes that help them. Discuss here the joys of flying and the airplanes that help you enjoy it.

To cowl or not to cowl

Reply
Old 03-04-2013, 02:18 PM
  #1
coalburner
Thread Starter
 
Join Date: Nov 2012
Location: Needham, MA
Posts: 25
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default To cowl or not to cowl

I recent acquired a new Joss Stik (balsa covered foam wing version) at a club auction. It has a new 90 como (super tiger). I plan to use a 14x6 prop.
This looks to be a very sturdy plane with a plywood and fully sheeted balsa fuselage. This sport plane could survive my rough landings.
I was thinking of making it a little more Eindecker looking by adding a cowl.
This could be made out a small aluminum sauce pan or even a clorax bleach bottle with some fiber glass reinforcing. I was concerned that the
proposed cowl might restrict the thrust generated from the prop. The Stik's fire wall measure 4"x4" and the proposed cowl will be about 6" in dia. The front of the cowl
will be pretty open to allow air to pass thru and it will attached to the fire wall with some aluminum angle brackets. So, would the cowl greatly reduce performance?
coalburner is offline  
Reply With Quote
Old 03-05-2013, 08:08 AM
  #2
RCVFR
 
Join Date: Feb 2002
Location: Keller, TX
Posts: 2,050
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: To cowl or not to cowl

Sounds like a cool idea. Go for it.
RCVFR is offline  
Reply With Quote
Old 03-05-2013, 07:10 PM
  #3
Bozarth
 
Join Date: Apr 2004
Location: Aurora, CO
Posts: 1,283
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: To cowl or not to cowl


Quote:
ORIGINAL: coalburner

...So, would the cowl greatly reduce performance?
No, the Joss stick is a heavy drag bucket. Your cowl won't help or hurt it.

Kurt
Bozarth is offline  
Reply With Quote
Old 03-06-2013, 06:01 AM
  #4
izzy-israel-73
 
Join Date: Jan 2013
Location: melbournevictoria, AUSTRALIA
Posts: 366
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: To cowl or not to cowl

izzy-israel-73 is offline  
Reply With Quote
Old 03-28-2013, 08:00 PM
  #5
jbrooks02
 
Join Date: Oct 2009
Location: New Bethlehem, PA
Posts: 7
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: To cowl or not to cowl

If you don't like the engine sitting out there all by itself, you might consider just putting cheeks on it. John
jbrooks02 is offline  
Reply With Quote
Reply


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 03:28 PM.