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

Logged in members see NO ADVERTISEMENTS!


Cleaning up my desk. Cox_ba12




Cleaning up my desk. 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


Cleaning up my desk. Empty
Live on Patrol


Cleaning up my desk.

Go down

Cleaning up my desk. Empty Cleaning up my desk.

Post  batjac Thu Jan 23, 2014 5:26 am

Well, I was cleaning up my desk, which is in desperate need of cleaning, when I got to a box of parts.  It was a Medallion .09 that I'd got cheap on eBay a few months ago.  I disassembled the engine and threw it in some fuel to soak overnight, and then cleaned up all the parts.  I dropped the circlip for the spray bar, and couldn't find it, so I put the parts in a little plastic box to await finding a new circlip.  Well, I happened to find the circlip last month, but had too many projects at the time, so I threw the circlip in the box and shoved it to the back of my desk.

Fast forward to this evening, and here pops up the Medallion parts.  Hmmm.... finish cleaning the desk, or put the Medallion back together.  Which will it be, which will it be?   Huh... 

Needless to say, the cleaning will wait for tomorrow.

Cleaning up my desk. DSCN1036_zps10be0d14
Cleaning up my desk. DSCN1038_zpscb011604
Cleaning up my desk. DSCN1040_zpsab9ab6a9
Cleaning up my desk. DSCN1041_zpsdd112884



The Easily Distracted Mark
batjac
batjac
Diamond Member
Diamond Member

2022 Supporter

2023 Supporter

Posts : 2332
Join date : 2013-05-22
Age : 60
Location : Broken Arrow, OK, USA

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  duke.johnson Thu Jan 23, 2014 9:25 am

Nice engine Mark! I've been watching for one for my box o' engines. I thought it would be cool on a 3 channel top wing ship.
duke.johnson
duke.johnson
Diamond Member
Diamond Member

Posts : 1734
Join date : 2012-11-05
Age : 52
Location : Rochester, Washington

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  Cribbs74 Thu Jan 23, 2014 9:32 am

That's a nice looking engine Mark!

Please tell me you disassembled the case to clean the oil groove.  Very Happy 
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

Cleaning up my desk. Empty Sooo jealous

Post  VUgearhead Thu Jan 23, 2014 1:45 pm

.09's are lacking in my collection, and this was the first one I wanted to collect. I remember the auction. You outbid me for this gem.
VUgearhead
VUgearhead
Gold Member
Gold Member

Posts : 155
Join date : 2013-07-02
Age : 56
Location : Boynton Beach, FL

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  Surfer_kris Thu Jan 23, 2014 2:56 pm

Here is a little line-up of RC engines;

Cleaning up my desk. Img_1711

Surfer_kris
Surfer_kris
Diamond Member
Diamond Member

Posts : 1893
Join date : 2010-11-20
Location : Sweden

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  duke.johnson Thu Jan 23, 2014 4:59 pm

Surfer_kris wrote:Here is a little line-up of RC engines;

Cleaning up my desk. Img_1711

those are nice, for sure.
duke.johnson
duke.johnson
Diamond Member
Diamond Member

Posts : 1734
Join date : 2012-11-05
Age : 52
Location : Rochester, Washington

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  RknRusty Thu Jan 23, 2014 5:22 pm

I love the looks of that engine, never seen one irl. How does that throttle work? It looks like a combination of exhaust restriction and a rotating spraybar. Kris, the front one with the muffler, is that an .049? I'd like to have a muffler like that. I have one of Roddies mufflers, but haven't flown a Tee Dee since I got it. Today would have been nice except I was involved with the Yak when I wasn't doing chores. I've got the flying and building itch bad right now.

I lay awake flying in my head all night last night. The night before, I lay awake gluing parts on the Yak, cutting parts for my speedster, building my Skyray, and putting together a Tach Race engine. Boy, I'm a mess aren't I. Thing is, if you took a picture of me in bed, I'd probably be smiling, and not even thinking about... well nevermind.

Sorry Mark, I'm a little punchy right now.

The weirdly happy Rusty drunken

_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!


My Hot Rock & Blues Playlist
RknRusty
RknRusty
Rest In Peace
Rest In Peace

Posts : 10869
Join date : 2011-08-10
Age : 68
Location : South Carolina, USA

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  Jason_WI Thu Jan 23, 2014 6:19 pm

RknRusty wrote: Kris, the front one with the muffler, is that an .049? I'd like to have a muffler like that. I have one of Roddies mufflers, but haven't flown a Tee Dee since I got it.

The weirdly happy Rusty drunken

The front engine is a TD RC05. It has an .051 cylinder without SPI. The muffler is somewhat heavy and leaked oil/exhaust all around the cylinder as it didnt have a tight seal. The tab on the back of the carb body held the muffler from rotating. The next engine is the TD RC09. The last one has the trombone muffler on the Medallion with a rotating spraybar. I have never run one of these to see how well the throttle worked. When it warms up I should try it as I have the .049, .09, and the .15 with this throttle.
Jason_WI
Jason_WI
Top Poster
Top Poster

2022 Supporter

Posts : 3123
Join date : 2011-10-09
Age : 48
Location : Neenah, WI

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  G.O. Stang Thu Jan 23, 2014 6:39 pm

The .05RC is certainly on my list of engines to collect. Can't ever find them through. Same with one if the trombone style rc engines. Very nice set you've got there.
G.O. Stang
G.O. Stang
Gold Member
Gold Member

Posts : 317
Join date : 2013-05-20
Age : 30
Location : Brenham, Tx

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  RknRusty Thu Jan 23, 2014 7:36 pm

Jason_WI wrote:...The last one has the trombone muffler on the Medallion with a rotating spraybar. I have never run one of these to see how well the throttle worked. When it warms up I should try it as I have the .049, .09, and the .15 with this throttle.
Thanks, Jason. I'm curious to know what position the spraybar orifice is in at idle and also full throttle. And it works in conjunction with the exhaust slider, right?
Rusty

_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!


My Hot Rock & Blues Playlist
RknRusty
RknRusty
Rest In Peace
Rest In Peace

Posts : 10869
Join date : 2011-08-10
Age : 68
Location : South Carolina, USA

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  getback Thu Jan 23, 2014 8:16 pm

Very nice both your LISTING AM waiting on my first 09 looks like jut a snap ring throttle, but still will be nice for the collection





$58.00


+ $5.54
http://thumbs4.ebaystatic.com/d/l140/pict/390745713911_1.jpg well that's the best I can do with the pic. hope to see it tommr. after work  Very Happy  do like that exhaust / throttle  system though !! Surprised
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

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  Surfer_kris Thu Jan 23, 2014 11:51 pm

Jason_WI wrote:The muffler is somewhat heavy and leaked oil/exhaust all around the cylinder as it didnt have a tight seal. The tab on the back of the carb body held the muffler from rotating.

If you look carefully you can see that I have sealed the muffler on mine. The stock one was vibrating a lot and ate away on the plastic tab. The fix was quite easy, one turn of aluminum foil from a soda can is attached with JB-weld inside the muffler. I have flow mine in a Yellow Jacket and the engine is not bad, but once I tried with a Norvel engine (1cc) there was simply no turning back...

Cleaning up my desk. Img_1313
Surfer_kris
Surfer_kris
Diamond Member
Diamond Member

Posts : 1893
Join date : 2010-11-20
Location : Sweden

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  Surfer_kris Thu Jan 23, 2014 11:56 pm

RknRusty wrote: I'm curious to know what position the spraybar orifice is in at idle and also full throttle. And it works in conjunction with the exhaust slider, right?
Rusty

Yes, they move together. I think the throttling is dominated by the exhaust restriction and the change in intake is there to adjust the fuel delivery and/or help with the fuel draw. On could disconnect the link for testing purposes, to see how much it helps I guess, but I haven't tried that.
Surfer_kris
Surfer_kris
Diamond Member
Diamond Member

Posts : 1893
Join date : 2010-11-20
Location : Sweden

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  Surfer_kris Fri Jan 24, 2014 12:00 am

Just remembered that I have put a bench run of 05RC on the tube. The TD-head was too high in terms of compression ratio (overheats) and I tried with the regular head (in the video). It then held full throttle better but ran a little rich/under-compressed below that. The best results I have had with a turbo head and a warm plug, OS P3.

Surfer_kris
Surfer_kris
Diamond Member
Diamond Member

Posts : 1893
Join date : 2010-11-20
Location : Sweden

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  batjac Fri Jan 24, 2014 2:17 am

RknRusty wrote:
Thanks, Jason. I'm curious to know what position the spraybar orifice is in at idle and also full throttle. And it works in conjunction with the exhaust slider, right?
Rusty

Rusty,  here're a couple of photos.  I couldn't get a great picture of the spray bar, but hopefully you get the picture.

Throttle fully open.  The muffler slide fully open and the two flats on the spraybar are perpendicular to the venturi.
Cleaning up my desk. Throttleopen_zps103f29fe

Throttle fully closed.  The muffler slide is fully covering the opening, and the spraybar has rotated approximately 45°forward.
Cleaning up my desk. Throttleclosed_zpsaee28867


The Hard to Focus Mark
batjac
batjac
Diamond Member
Diamond Member

2022 Supporter

2023 Supporter

Posts : 2332
Join date : 2013-05-22
Age : 60
Location : Broken Arrow, OK, USA

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  batjac Fri Jan 24, 2014 2:26 am

Surfer_kris wrote: One could disconnect the link for testing purposes, to see how much it helps I guess, but I haven't tried that.

I've not run the .09 yet, but when I ran my Medallion .049 with this setup I was extremely impressed. I'm pretty sure I remember it throttling down to just over 4K, and at full throttle it was mid to upper teens. I don't remember the exact high RPM, but I remember being impressed that the high to low ratio was about 4-1.

An experiment I've been thinking about trying is to just take the muffler collector off of a Medallion .049 with this setup and put it on a SureStart engine and see how well it throttles. Just another experiment on the growing list of things to try as time permits.

The Busy Bee Mark
batjac
batjac
Diamond Member
Diamond Member

2022 Supporter

2023 Supporter

Posts : 2332
Join date : 2013-05-22
Age : 60
Location : Broken Arrow, OK, USA

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

Post  WingingIt74 Fri Jan 24, 2014 7:44 am

I cleaned up my desk and I didn't find a darn thing.... thanks for the great idea  DAMMIT! .... it will take me months to get it back like it was....
 lol! 
WingingIt74
WingingIt74
Top Poster
Top Poster

Posts : 3189
Join date : 2011-08-11
Age : 49
Location : Waterloo, IL

https://www.facebook.com/wingingit74/

Back to top Go down

Cleaning up my desk. Empty Re: Cleaning up my desk.

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