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Cox Engine of The Month
CEF Traveling Engine
Win This Engine!
Live on Patrol
VIDEO: Cox Sportsman .15
Page 1 of 1
VIDEO: Cox Sportsman .15
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.
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.
Last edited by MauricioB on Mon Mar 28, 2016 10:30 pm; edited 1 time in total
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Isn't there a muffler/throttle for the .15 engine?
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.
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
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
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)
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Re: VIDEO: Cox Sportsman .15
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.
They work so well I put one on my Olympus 15
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.
They work so well I put one on my Olympus 15
Last edited by 1/2A Nut on Sat Feb 20, 2016 11:32 pm; edited 1 time in total
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Looks easy
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.
Looks easy. How long did it take to make the collar?
happydad
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Re: VIDEO: Cox Sportsman .15
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.
Here are some of my 15's set up for RC throttle use:
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.
Here are some of my 15's set up for RC throttle use:
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Re: VIDEO: Cox Sportsman .15
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".
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".
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Re: VIDEO: Cox Sportsman .15
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
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
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Re: VIDEO: Cox Sportsman .15
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.-
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.-
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I have the one in the picture I showed.
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
inside diameter in inches.
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)
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Re: VIDEO: Cox Sportsman .15
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
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
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Re: VIDEO: Cox Sportsman .15
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
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Re: VIDEO: Cox Sportsman .15
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
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.-
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Re: VIDEO: Cox Sportsman .15
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
inside diameter in inches.see aboveother 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.-
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Re: VIDEO: Cox Sportsman .15
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
.-
Place a carburetor of a O.S. .40 FP, I am very happy, I leave photos of some progress. Greetings...Mauricio
.-
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Re: VIDEO: Cox Sportsman .15
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
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Re: VIDEO: Cox Sportsman .15
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
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.-
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Re: VIDEO: Cox Sportsman .15
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.
Propeller in video: Master 7x5
I then concluded with the speed control .15 Sportsman, here I leave the video test.
Greetings, Mauricio.
Propeller in video: Master 7x5
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Re: VIDEO: Cox Sportsman .15
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 ???
Thank you!...Mauricio.
In the photo I'm pointing the thread of the engine air intake, could someone tell me that thread is ???
Thank you!...Mauricio.
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Re: VIDEO: Cox Sportsman .15
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.-
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.-
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Re: VIDEO: Cox Sportsman .15
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
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
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Re: VIDEO: Cox Sportsman .15
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
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Re: VIDEO: Cox Sportsman .15
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
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
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Re: VIDEO: Cox Sportsman .15
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
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Re: VIDEO: Cox Sportsman .15
1/2A Nut Sat May 07, 2016 12:31 am
http://www.mh-aerotools.de/airfoils/cox_techinfo.htm
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Re: VIDEO: Cox Sportsman .15
MauricioB Sat May 07, 2016 12:35 am
1/2A Nut wrote:http://www.mh-aerotools.de/airfoils/cox_techinfo.htm
Very good information! ...
If not misinterpret the measure it is 3/8 x 32?
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