Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


VIDEO: Cox Sportsman .15 Cox_ba12




VIDEO: Cox Sportsman .15 Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» my attempt at making an exhaust throttle for Cox .049
by balogh Today at 12:07 am

» Testers Sprite engine swap
by Greenman38633 Yesterday at 9:32 pm

» Elfin 0.5cc (Arnie Hende replica)
by dan vincent Yesterday at 9:18 pm

» Introducing our Cox .049 TD Engines
by layback209 Yesterday at 9:10 pm

» Anderson Baby Spitfire - looking for the aft tank and gasket
by Boats13 Yesterday at 8:18 pm

» Fuel residue stain clening help
by akjgardner Yesterday at 7:53 pm

» Another of C.T. engines cleaned ---- Cox Tee Dee .09 --- Just today (3/26/2024) more Cox parts
by sosam117 Yesterday at 5:55 pm

» Cox powered boat litle shrimp hidroplane
by davidll1984 Yesterday at 2:52 pm

» Introducing the new - "QZ" RR-1
by roddie Yesterday at 1:08 pm

» STUKA bomb dimentions needed
by latole Yesterday at 9:36 am

» Indexing COX cylinders
by davidll1984 Yesterday at 7:56 am

» 1/2a Skyray plans?
by 944_Jim Wed Mar 27, 2024 10:14 pm

Cox Engine of The Month
March-2024
balogh's

"COX Budapest" .049 engine



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


VIDEO: Cox Sportsman .15 Empty
Live on Patrol


VIDEO: Cox Sportsman .15

Go down

VIDEO: Cox Sportsman .15 Empty VIDEO: Cox Sportsman .15

Post  MauricioB Sat Feb 20, 2016 9:53 pm

Query:
Hello, someone has tried to control the speed of this engine any device ?,'m thinking ?, do some guillotine system that is adjustable by a servo and thereby controlling the speed or acceleration.
Someone must have developed something?
Thank you.
VIDEO: Cox Sportsman .15 Foto0113


Last edited by MauricioB on Mon Mar 28, 2016 10:30 pm; edited 1 time in total
MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Isn't there a muffler/throttle for the .15 engine?

Post  happydad Sat Feb 20, 2016 10:40 pm

MauricioB wrote:Query:
Hello, someone has tried to control the speed of this engine any device ?,'m thinking ?, do some guillotine system that is adjustable by a servo and thereby controlling the speed or acceleration.
Someone must have developed something?
Thank you.
VIDEO: Cox Sportsman .15 Foto0113

Mauricio: Isn't there a muffler/throttle for the .15 engine? I bought a combo for a .049 engine (?), but it was too large. I'll see if I have a picture.

link: http://www.ebay.com/itm/Used-COX-VINTAGE-THROTTLE-/141855529455?_trksid=p2047675.l2557&ssPageName=STRK%3AMEBIDX%3AIT&nma=true&si=2bwWECk9CXKzXQgNbv3cQEIRz8s%253D&orig_cvip=true&rt=nc

VIDEO: Cox Sportsman .15 Cox_1510
Cox .15 muffler-throttle made by Cox

There was a previous post. I'll edit after I find it and add the link to it with the dimensions.

previous posts: https://www.coxengineforum.com/t9186-anyone-know-what-size-cox-medallion-this-muffler-is-for?highlight=muffler+throttle

happydad RC Plane


Last edited by happydad on Sat Feb 20, 2016 10:42 pm; edited 1 time in total (Reason for editing : to add link to previous posts)
happydad
happydad
Rest In Peace
Rest In Peace

Posts : 1592
Join date : 2012-05-28
Age : 78
Location : Escondido, CA

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  1/2A Nut Sat Feb 20, 2016 11:17 pm

The cylinders bottom flange doesnt allow you to simply slip over a throttle sleeve.
The trick around that is to find tubing the same OD of the cylinder cut it in half
and then slip over the next size up in tubing that will slip past the cylinders bottom
flange. Here is one of mine as described.

VIDEO: Cox Sportsman .15 Cox_1510

They work so well I put one on my Olympus 15

VIDEO: Cox Sportsman .15 Imag0310


Last edited by 1/2A Nut on Sat Feb 20, 2016 11:32 pm; edited 1 time in total
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3402
Join date : 2013-10-20
Age : 60
Location : Brad in Texas

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Looks easy

Post  happydad Sat Feb 20, 2016 11:28 pm

1/2A Nut wrote:The cylinders bottom flange doesnt allow you to simply slip over a throttle sleeve.
The trick around that is to find tubing the same OD of the cylinder cut it in half
and then slip over the next size up in tubing that will slip past the cylinders bottom
flange. Here is one of mine as described.

VIDEO: Cox Sportsman .15 Cox_1510

Looks easy. How long did it take to make the collar?

happydad RC Plane
happydad
happydad
Rest In Peace
Rest In Peace

Posts : 1592
Join date : 2012-05-28
Age : 78
Location : Escondido, CA

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  1/2A Nut Sat Feb 20, 2016 11:45 pm

Of course if your willing you can buy a Medallion .15 that has a exhaust throttle
and swap out the top end. Here is one of my Sportsman's with a slide throttle.
The up swing is all the goo is directed out one side of the engine.

VIDEO: Cox Sportsman .15 Imag0311

Here are some of my 15's set up for RC throttle use:

VIDEO: Cox Sportsman .15 Imag2010

Small Cox Logo Small Cox Logo Small Cox Logo Small Cox Logo Small Cox Logo Small Cox Logo Small Cox Logo Small Cox Logo Small Cox Logo Small Cox Logo Small Cox Logo
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3402
Join date : 2013-10-20
Age : 60
Location : Brad in Texas

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  ian1954 Sun Feb 21, 2016 5:35 am

Excellent photos in this topic - I do like the Sportsmen and the Olympics - and, again, the ability to mix and match Cox parts to achieve a flyable engine.

I also notice that a few of these have glow plug conversions - a pukka head can be expensive and hard to obtain.

Pukka
In UK slang, it can mean "genuine" or simply "very good".
ian1954
ian1954
Diamond Member
Diamond Member

Posts : 2688
Join date : 2011-11-16
Age : 69
Location : England

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Sun Feb 21, 2016 11:14 pm

happydad
Hello, thank you very much for the photos and valuable answers. Unfortunately I do not get those pieces in my country, and I'd love to have one.
Very grateful for your answer greetings Mauricio
MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Sun Feb 21, 2016 11:18 pm

1/2A Nut
Thank you very much, you've made an excellent piece, I'll see if I can do something with a friend .... turner!
Very interesting development.
Thank you, Mauricio.-
MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty I have the one in the picture I showed.

Post  happydad Sun Feb 21, 2016 11:20 pm

MauricioB wrote:happydad
Hello, thank you very much for the photos and valuable answers. Unfortunately I do not get those pieces in my country, and I'd love to have one.
Very grateful for your answer greetings Mauricio

VIDEO: Cox Sportsman .15 Coxmed10
inside diameter in inches. see above other posts for diameter in mm. (20.7mm inside diameter, 32.22mm outside dimension of muffler)
For cox .15 engine

happydad


Last edited by happydad on Sun Feb 21, 2016 11:32 pm; edited 2 times in total (Reason for editing : edited for mm measurement)
happydad
happydad
Rest In Peace
Rest In Peace

Posts : 1592
Join date : 2012-05-28
Age : 78
Location : Escondido, CA

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  1/2A Nut Mon Feb 22, 2016 12:53 am

As another option could add a carb like I did with my modified rear induction 1/2A
I simply used some rubber hose to connect things together non destructive and
allows the engine to return to its original state.
Another option...
With the TD .010 I file down the cylinders sleeve footing allowing
a easy slip on exhaust throttle, could do that with the .15


VIDEO: Cox Sportsman .15 Modifi10

1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3402
Join date : 2013-10-20
Age : 60
Location : Brad in Texas

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  getback Mon Feb 22, 2016 8:17 am

Nice Looking bunch there 1/2anut , I see you use a lot of throttled engines , the rear induction carb. is sweet for one of your boats I pre sum . getback Small Cox Logo
getback
getback
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 10028
Join date : 2013-01-18
Age : 66
Location : julian , NC

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Wed Feb 24, 2016 10:30 pm

1/2A Nut wrote:As another option could add a carb like I did with my modified rear induction 1/2A
I simply used some rubber hose to connect things together non destructive and
allows the engine to return to its original state.
Another option...
With the TD .010 I file down the cylinders sleeve footing allowing
a easy slip on exhaust throttle, could do that with the .15


VIDEO: Cox Sportsman .15 Modifi10


Thank you all for the information. What a beautiful collection of engines!
I'll finally see as resolve, you may place a carburetor air intake of the engine, as you indicated in your engine photo!
Thank you! Mauricio.-
MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Wed Feb 24, 2016 10:32 pm

happydad wrote:
MauricioB wrote:happydad
Hello, thank you very much for the photos and valuable answers. Unfortunately I do not get those pieces in my country, and I'd love to have one.
Very grateful for your answer greetings Mauricio

VIDEO: Cox Sportsman .15 Coxmed10
inside diameter in inches. see above other posts for diameter in mm. (20.7mm inside diameter, 32.22mm outside dimension of muffler)
For cox .15 engine

happydad

Thanks for all the information you provide me !, greetings, Mauricio.-
MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Sun Mar 27, 2016 5:03 pm

Hi all, I appreciate the information you have given me, I started to do tests and it really works !!!.
Place a carburetor of a O.S. .40 FP, I am very happy, I leave photos of some progress. Greetings...Mauricio Smile .-

VIDEO: Cox Sportsman .15 Foto0310
VIDEO: Cox Sportsman .15 Foto0311
VIDEO: Cox Sportsman .15 Foto0312
VIDEO: Cox Sportsman .15 Foto0313
VIDEO: Cox Sportsman .15 Foto0314
VIDEO: Cox Sportsman .15 Foto0315

MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  getback Sun Mar 27, 2016 10:38 pm

Nice!! you put a carburetor of a O.S. .40 FP on that .15 Sportsman//// Man , did that make a difference in the RPMs or make REV up faster ? What size Prop where you using ? Eric Small Cox Logo
getback
getback
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 10028
Join date : 2013-01-18
Age : 66
Location : julian , NC

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Mon Mar 28, 2016 12:32 am

getback wrote:Nice!! you put a carburetor of a O.S. .40 FP on that .15 Sportsman//// Man , did that make a difference in the RPMs or make REV up faster ? What size Prop where you using ? Eric Small Cox Logo

Eric, how are you?!, Well, I initially doing tests to see that result throws. I had this carburetor and place it on a trial basis.
I made some modifications to the engine support so that the carburetor is appreciated also place a command to the throttle, and also remove the needle from the original carburetor O.S. and place a screw cap. Tomorrow I'll do some walking tests to see how it works.
Also this modified spark plug, is an original candle that burned down, and was modified to accommodate a plug standart in this case is a K & B.
Friend, will soon see how it works !!!, interesting!...Mauricio.-

VIDEO: Cox Sportsman .15 Foto0316
VIDEO: Cox Sportsman .15 Foto0317
VIDEO: Cox Sportsman .15 Foto0318
VIDEO: Cox Sportsman .15 Foto0319
VIDEO: Cox Sportsman .15 Foto0320
MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Mon Mar 28, 2016 10:33 pm

Hello, first thank the collaboration of you for the very useful information.
I then concluded with the speed control .15 Sportsman, here I leave the video test.
Greetings, Mauricio. cheers

Propeller in video: Master 7x5

MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Fri May 06, 2016 11:15 pm

Hello everyone, I turn to you if I can tell.
In the photo I'm pointing the thread of the engine air intake, could someone tell me that thread is ???Huh...
Thank you!...Mauricio.

VIDEO: Cox Sportsman .15 Foto0656
MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Fri May 06, 2016 11:28 pm

Other questions:

Which is ideal for this engine propeller?
That fuel recommended for best performance?
What is the opinion of you on the design of this engine?

Thank you, Mauricio.-
MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  Cribbs74 Sat May 07, 2016 12:05 am

I think the original propeller used in the Commanche application was a 6X6, you probably won't find one of those easily. I would suggest you start with a 7x3 and go no more than an 8x4, you should find the best prop for your application in that range.

Since it's a Cox I would imagine the Nitro content could go pretty high. Wouldn't go less than 15%.

I don't know the thread pitch.

Ron
Cribbs74
Cribbs74
Moderator

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 11892
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Sat May 07, 2016 12:17 am

Cribbs74 wrote:I think the original propeller used in the Commanche application was a 6X6, you probably won't find one of those easily. I would suggest you start with a 7x3 and go no more than an 8x4, you should find the best prop for your application in that range.

Since it's a Cox I would imagine the Nitro content could go pretty high. Wouldn't go less than 15%.

I don't know the thread pitch.

Ron

Ron Hello !, thanks for your reply, I am using a 7 x 5 and throws a 12000 rpm. I think it's healthy for the engine, which believes you?
The fuel I use is 18% castor and 25% nitromethane, methyl alcohol moiety.
With respect to the thread, where it could find? Thank you!..Mauricio.-


Last edited by MauricioB on Sat May 07, 2016 12:19 am; edited 1 time in total
MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  1/2A Nut Sat May 07, 2016 12:18 am

http://www.mh-aerotools.de/airfoils/cox_techinfo.htm




Another good prop for a bit faster sport flying.

APC 6.5x5 10 Pylon Propeller LP06550


Last edited by 1/2A Nut on Sat May 07, 2016 12:30 am; edited 1 time in total
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3402
Join date : 2013-10-20
Age : 60
Location : Brad in Texas

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Sat May 07, 2016 12:22 am

1/2A Nut wrote:
Another good prop for a bit faster sport flying.

APC 6.5x5 10 Pylon Propeller LP06550

Hello, thanks for the information!.
Have information on the thread I show in the photo ?, what extent is it ?, thanks, Mauricio
MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  1/2A Nut Sat May 07, 2016 12:31 am

1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3402
Join date : 2013-10-20
Age : 60
Location : Brad in Texas

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  MauricioB Sat May 07, 2016 12:35 am


Very good information! ...
If not misinterpret the measure it is 3/8 x 32?
MauricioB
MauricioB
Top Poster
Top Poster

Posts : 3517
Join date : 2016-02-16
Age : 52
Location : ARG

Back to top Go down

VIDEO: Cox Sportsman .15 Empty Re: VIDEO: Cox Sportsman .15

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum