Home
FAQ
Rules
Search
Register
Log in
Log in
Search
Latest topics
» Comet Belondby Mark Boesen Yesterday at 11:51 pm
» Tee Dee .010 exhaust restricter
by 1/2A Nut Yesterday at 11:34 pm
» The Aurora L-19 Bird Dog, more than just an airplane
by Cribbs74 Yesterday at 11:29 pm
» Pee Wee Horseshoe back plate
by fit90 Yesterday at 7:18 pm
» Lil Tiger - Gloss Pumpkin Orange
by GallopingGhostler Yesterday at 3:37 pm
» Ring Rat 100
by getback Yesterday at 9:52 am
» Anyone recognize this model airplane?
by rsv1cox Yesterday at 9:23 am
» Engines/parts for sale
by robot797 Yesterday at 5:03 am
» Cox aluminum piston?
by 1/2A Nut Yesterday at 1:04 am
» Another proposed design by Roddie
by roddie Thu Feb 21, 2019 11:07 pm
Cox Engine of The Month
February-2019
balogh's
"Black Lynx .049 with a Throttle, Exhaust Deflector and Nelson-Galbreath head set"
PAST WINNERS
balogh's
"Black Lynx .049 with a Throttle, Exhaust Deflector and Nelson-Galbreath head set"
PAST WINNERS
CEF Traveling Engine
Win This Engine!
The Traveling Prop
World of Aviation
Cowl vs prop size
Page 2 of 2 • Share •
Page 2 of 2 • 
1, 2
can`t hurt to try
Jaspur_x on Wed Dec 28, 2011 4:25 am
I am just going by my limited experience here guys, 1 model with a cowl in all my years isn`t a lot of experience, my cowl is about 3/4" behind the prop, and only blocks about 1/3rd the prop.
The ww2 paratropers called it prop blast, so thats what I went with.
The ww2 paratropers called it prop blast, so thats what I went with.
Jaspur_x- Banned
- Posts : 710
Join date : 2011-04-22
Age : 46
Location : Shanksville,Pa, yes that flight 93 place 
Re: Cowl vs prop size
Cribbs74 on Wed Dec 28, 2011 8:20 am
Ok,
I will try a .020 because it can't hurt but, I will pick up some Texaco pieces just in case.
I will try a .020 because it can't hurt but, I will pick up some Texaco pieces just in case.
Cribbs74- Moderator
Posts : 10200
Join date : 2011-10-24
Age : 44
Location : Tuttle, OK-
Re: Cowl vs prop size
SuperDave on Wed Dec 28, 2011 8:30 am
JPvelo wrote:I say try it with the .020. Prop blast only happens when the model is standing still. Once in flight the "blast" matches forward velocity. The prop isn't pushing air backwards like a fan, it is pulling the aircraft forward due to it's airfoil cross section that creates "lift" in front of the aircraft.
Excellent post, JP! Welcome to the forum.
SuperDave- Rest In Peace
- Posts : 3552
Join date : 2011-08-13
Location : Washington (state) -
Re: Cowl vs prop size
microflitedude on Wed Dec 28, 2011 12:21 pm
SuperDave wrote:JPvelo wrote:I say try it with the .020. Prop blast only happens when the model is standing still. Once in flight the "blast" matches forward velocity. The prop isn't pushing air backwards like a fan, it is pulling the aircraft forward due to it's airfoil cross section that creates "lift" in front of the aircraft.
Excellent post, JP! Welcome to the forum.
+1.
Very informative.
microflitedude- Top Poster
-
Posts : 3417
Join date : 2011-08-17
Age : 21
Location : Columbia, SC -
Re: Cowl vs prop size
049flyer on Tue Jun 06, 2017 8:11 pm
Baby Bee .049 puts out about the same power as your Tee Dee .020. Try the Baby Bee, it will swing a 6 inch prop easily and even a 7 inch.
049flyer- New Member
- Posts : 1
Join date : 2014-06-28
Location : Tyler, TX -
Re: Cowl vs prop size
RknRusty on Tue Jun 06, 2017 9:59 pm
Hi, 049flyer,
Welcome to CEF.... or welcome to posting, anyway. I see you joined a few years ago.
You've found a really old thread here, but Cribbs, the OP is online right now. I'm curious to see if you just gave him he answer he was looking for... 6 years later.
On Christmas day too.
Welcome to CEF.... or welcome to posting, anyway. I see you joined a few years ago.
You've found a really old thread here, but Cribbs, the OP is online right now. I'm curious to see if you just gave him he answer he was looking for... 6 years later.
On Christmas day too._________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Moderator
- Posts : 10670
Join date : 2011-08-10
Age : 62
Location : South Carolina, USA -
Re: Cowl vs prop size
Cribbs74 on Wed Jun 07, 2017 10:47 pm
Not so much, that project had been placed in storage after I picked up the handle. Knowing what I know now I would more than likely choose a different engine altogether.
I do appreciate the reply though and welcome to CEF!
I do appreciate the reply though and welcome to CEF!
Cribbs74- Moderator
-
Posts : 10200
Join date : 2011-10-24
Age : 44
Location : Tuttle, OK -
Re: Cowl vs prop size
roddie on Thu Jun 08, 2017 2:35 pm
Cribbs74 wrote:Not so much, that project had been placed in storage after I picked up the handle. Knowing what I know now I would more than likely choose a different engine altogether.
I do appreciate the reply though and welcome to CEF!
It's cool when old threads like this one resurface. I remember having similar concerns with running a cowl on my 1st CEF Reed-Speed model. Coincidentally Ron...
your model for that contest was............ 
roddie- Top Poster
- Posts : 6271
Join date : 2013-07-17
Age : 59
Location : N. Smithfield, Rhode Island -
Page 2 of 2 • 1, 2
Similar topics» fox 35...prop size ?
» enya .09 and enya .19
» New Fox .15
» *Cox Engine of The Month* Submit your pictures! -July 2014-
» Question Cox .020 prop screw size
» enya .09 and enya .19
» New Fox .15
» *Cox Engine of The Month* Submit your pictures! -July 2014-
» Question Cox .020 prop screw size
Page 2 of 2
Permissions in this forum:
You cannot reply to topics in this forum