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

Logged in members see NO ADVERTISEMENTS!


The disappointing OK Cub - Page 2 Cox_ba12




The disappointing OK Cub - Page 2 Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Automobiles you don't see everyday...
by rsv1cox Today at 2:02 pm

» .020 Throttle
by rdw777 Today at 11:06 am

» Glow plug will not glow
by Levent Suberk Today at 11:01 am

» Project Cox .049 r/c & Citabrian Champion
by rdw777 Today at 10:32 am

» Jim Walker Firebaby
by rdw777 Today at 10:28 am

» Snail type throttle
by Greenman38633 Today at 9:28 am

» K&B Torpedo .19 Green Head CL Needle Valve
by Ken Cook Today at 8:08 am

» Making a water-cooling coil for a Cox .049 engine
by getback Today at 6:36 am

» Cox .35 and .40 in Nürnberg Toy Fair
by ffkiwi Today at 3:52 am

» Enya .09 II Questions
by Surfer_kris Today at 12:26 am

» [solved]most Efficent Glowhead Clip for Norvel Engine
by Levent Suberk Yesterday at 9:37 pm

» 22mm 2-blade nylon marine prop and solid-shaft drive
by roddie Yesterday at 5:14 pm

Cox Engine of The Month
April-2024
OVERLORD's

"Kress ducted fan with new Cox Conquest 15 RC"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


The disappointing OK Cub - Page 2 Empty
Live on Patrol


The disappointing OK Cub

Page 2 of 2 Previous  1, 2

Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  Mike1484 Thu Jul 11, 2019 11:06 am

I had a similar experience with a loose back plate . Remove tank and see if the round back plate is loose or missing a gasket .

Mike1484
Mike1484
Mike1484
Gold Member
Gold Member

Posts : 296
Join date : 2011-10-28
Age : 75
Location : Northern Ohio

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  GWILLIEFOX Thu Jul 11, 2019 5:27 pm

The Power Kit instructions give the correct gasket information. There is a fibre gasket behind the rear cover cover. This must be in place and the rear cover snug. The is one (1) copper gasket between the lower cylinder and the crankcase. This must be in position and the cylinder snugged down. It s easy to mount this gasket off center, there isn't a good locating setup. Hold the cylinder upside down, center the gasket and screw on the crankcase; once snug you can't turn it upright and tighten the cylinder. There are 2 to 4 head casets between the top of the cylinder and the hex cylinder head:
use 2 gaskets if you live above 4,000 feet
use 3 gaskets if you live between 2,000-4,000 feet
use 4 gaskets if you live lower than 2,000 feet.

The original Cub used a long glow plug.
GWILLIEFOX
GWILLIEFOX
Rest In Peace
Rest In Peace

Posts : 304
Join date : 2014-12-23
Age : 80
Location : Beaver Falls, PA

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  getback Thu Jul 11, 2019 6:14 pm

I didn't read all the post yet but this pic show green on the outside of the threads can you imagine what's inside ,.,.,. The disappointing OK Cub - Page 2 P7100010
And this does Not ,.,.,., The disappointing OK Cub - Page 2 73db4c10                                             The disappointing OK Cub - Page 2 Img_2102  4th of July Flag 4th of July Flag 4th of July Flag 4th of July Flag Babe Bee .049 Babe Bee .049 Babe Bee .049 Babe Bee .049 lol! lol! lol! lol! I Love This Forum! I Love This Forum! I Love This Forum! I Love This Forum!
getback
getback
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 10100
Join date : 2013-01-18
Age : 66
Location : julian , NC

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  rsv1cox Thu Jul 11, 2019 6:22 pm

OK (pun intended) you guys got me all excited to try this engine again, but...…………

I just googled (well binged) OK Cub model engines and went through a bunch of pictures finding a total of none like mine. Until someone shows me a picture of yours that is identical to mine I'm thinking I have a million dollar collectable one-off here.

Bob
rsv1cox
rsv1cox
Top Poster
Top Poster

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 10523
Join date : 2014-08-18
Location : West Virginia

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  rsv1cox Thu Jul 11, 2019 6:25 pm

getback wrote:I didn't read all the post yet but this pic show green on the outside of the threads can you imagine what's inside ,.,.,. [/url]  4th of July Flag 4th of July Flag 4th of July Flag 4th of July Flag Babe Bee .049 Babe Bee .049 Babe Bee .049 Babe Bee .049 lol! lol! lol! lol! I Love This Forum! I Love This Forum! I Love This Forum! I Love This Forum!

That green equals dollars Eric should anyone desire this valuable one-off engine...……………..
rsv1cox
rsv1cox
Top Poster
Top Poster

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 10523
Join date : 2014-08-18
Location : West Virginia

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  getback Thu Jul 11, 2019 7:31 pm

I got a dollar W/free shipping Fireworks lol! lol! lol!
getback
getback
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 10100
Join date : 2013-01-18
Age : 66
Location : julian , NC

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  Oldenginerod Thu Jul 11, 2019 8:03 pm

rsv1cox wrote:OK (pun intended) you guys got me all excited to try this engine again, but...…………

I just googled (well binged) OK Cub model engines and went through a bunch of pictures finding a total of none like mine.  Until someone shows me a picture of yours that is identical to mine I'm thinking I have a million dollar collectable one-off here.  

Bob
Sorry Bob, you don't have anything special there. I think I have three of them. If it has no size marking, or .049, it's an .049 "long stroke". The .074 is nearly identical, but should have .074 on the case. Pretty much everything in this .049 engine is different to the .049B which followed. Even the head is different due to a different size bore. As mentioned, it takes a long plug where the "B" has a short.
Sorry, I have no pictures of mine on hand.
Oldenginerod
Oldenginerod
Top Poster
Top Poster

Posts : 3969
Join date : 2012-06-15
Age : 61
Location : Drouin, Victoria

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  Oldenginerod Thu Jul 11, 2019 8:14 pm

Thanks to Mark Boesen, these pictures are from the old .049 Collectors site.  If the link works, it shows clearly the difference between the models.  The info on the .074 picture states that it has the same case and stroke as the .049, just a larger bore.

.049
The disappointing OK Cub - Page 2 Screen10

.074
The disappointing OK Cub - Page 2 Screen15

https://groups.yahoo.com/neo/groups/049Collectors/photos/albums/408072958


Last edited by Oldenginerod on Thu Jul 11, 2019 9:31 pm; edited 1 time in total
Oldenginerod
Oldenginerod
Top Poster
Top Poster

Posts : 3969
Join date : 2012-06-15
Age : 61
Location : Drouin, Victoria

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  ticomareado Thu Jul 11, 2019 8:24 pm

On the long stroke Cub .049 I believe we can divide them thusly: First release Arden plugs, later release with OK long plugs and early runs with serial numbers, later without. Then maybe some NV variants.
ticomareado
ticomareado
Account Under Review

Posts : 1089
Join date : 2013-10-03
Location : NC

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  GWILLIEFOX Thu Jul 11, 2019 9:00 pm

rsv1cox wrote:OK (pun intended) you guys got me all excited to try this engine again, but...…………

I just googled (well binged) OK Cub model engines and went through a bunch of pictures finding a total of none like mine.  Until someone shows me a picture of yours that is identical to mine I'm thinking I have a million dollar collectable one-off here.  

Bob
The disappointing OK Cub - Page 2 Oks_ca10
In the center on top of th3 yellow OK box
GWILLIEFOX
GWILLIEFOX
Rest In Peace
Rest In Peace

Posts : 304
Join date : 2014-12-23
Age : 80
Location : Beaver Falls, PA

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  rsv1cox Fri Jul 12, 2019 6:33 am

getback wrote:I got a dollar W/free shipping Fireworks lol! lol! lol!

Ok...…….again.

Considering the above, I have one dollar do I hear two...…………Smile

Bob
rsv1cox
rsv1cox
Top Poster
Top Poster

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 10523
Join date : 2014-08-18
Location : West Virginia

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  ticomareado Fri Jul 12, 2019 6:52 am

That "yellow box" originally had a Cub .049 w/ Arden plug and prolly a ser. #
ticomareado
ticomareado
Account Under Review

Posts : 1089
Join date : 2013-10-03
Location : NC

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  GWILLIEFOX Fri Jul 12, 2019 9:48 am

ticomareado wrote:That "yellow box" originally had a Cub .049 w/ Arden plug and prolly a ser. #
Correct. And it didn't have a tank.
GWILLIEFOX
GWILLIEFOX
Rest In Peace
Rest In Peace

Posts : 304
Join date : 2014-12-23
Age : 80
Location : Beaver Falls, PA

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  rsv1cox Fri Jul 12, 2019 10:19 am

GWILLIEFOX wrote:
ticomareado wrote:That "yellow box" originally had a Cub .049 w/ Arden plug and prolly a ser. #
Correct.  And it didn't have a tank.

Nice assortment Bill. I have the boxed example on the right, but that's it. From time to time I see the others come up on ebay but I resist the urge.

What's the sparker on the left and does it have an OK Cub connection?

Bob
rsv1cox
rsv1cox
Top Poster
Top Poster

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 10523
Join date : 2014-08-18
Location : West Virginia

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  Ken Cook Fri Jul 12, 2019 3:47 pm

Looks like a Forster .99. We had one running at the field last week. I have a plane with a Drone .29 converted to glow which we might squeeze the Forster into.
https://www.facebook.com/PhillyFliersCL/videos/vb.513140418756097/645005299244252/?type=2&theater
Ken Cook
Ken Cook
Top Poster
Top Poster

Posts : 5444
Join date : 2012-03-27
Location : pennsylvania

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  GWILLIEFOX Fri Jul 12, 2019 5:08 pm

rsv1cox wrote:
GWILLIEFOX wrote:
ticomareado wrote:That "yellow box" originally had a Cub .049 w/ Arden plug and prolly a ser. #
Correct.  And it didn't have a tank.

Nice assortment Bill.  I have the boxed example on the right, but that's it.  From time to time I see the others come up on ebay but I resist the urge.

What's the sparker on the left and does it have an OK Cub connection?

Bob[/qxuote]
I pick3d up the 4 Cubs, the mini Dooling 29, and the Forster 99 at the Cabin Fever show last February.  The 99 is a pre WW 2 version.  The Forster  has no connection to the cubs.  Here is the case
The disappointing OK Cub - Page 2 Img_5810
GWILLIEFOX
GWILLIEFOX
Rest In Peace
Rest In Peace

Posts : 304
Join date : 2014-12-23
Age : 80
Location : Beaver Falls, PA

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  davidll1984 Wed Jan 03, 2024 9:11 pm

I was reading on this topic and here I have a tank that I found for my .074 engine during the cleaning I found that the fuel tube was blocked but not by debris or anything else but because it was pushed in and pressed against the tank walls Could be a cause and certainly something to check if you have good flow this could be the cause also I noticed the flat needle look like no point at the t'il its a little strange The disappointing OK Cub - Page 2 17043310
The disappointing OK Cub - Page 2 17043311
davidll1984
davidll1984
Diamond Member
Diamond Member

Posts : 2284
Join date : 2020-02-12
Age : 39
Location : shawinigan

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  davidll1984 Wed Jan 03, 2024 9:24 pm

Maybe someone here knows the difference between these two engines the two .074 ok one with a 6 on the casing above the crankchaft the other same place but 5 also notice the difference being the two crank prop driver but the engine casing seems identical to me
The disappointing OK Cub - Page 2 17043312
The disappointing OK Cub - Page 2 17043313
The disappointing OK Cub - Page 2 17043314

davidll1984
davidll1984
Diamond Member
Diamond Member

Posts : 2284
Join date : 2020-02-12
Age : 39
Location : shawinigan

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  Ken Cook Thu Jan 04, 2024 4:10 am

The early cases which were introduced in 1949. Your engines are the early versions. They were made in this format until about 1953-1954. The early case engines were made in .049 and in .074 using the same case.  Sometimes and most of the time,  the size is designated on the bottom of the case. One thing as you noticed depending on year of introduction was the prop driver, they changed slightly. The needle of a OK is a piece of crap. No taper, it's a wonder it works and half the time it doesn't. Don't expect it to respond like other needles do. It will work in the engine, it just takes a bit of fiddling. It's critically important that internally in the spraybar, it's clean. You can dress a chamfer on the end of the blunt needle to clean it up a bit which will offer a bit more accuracy in needle position. Most of the time, I just slide tubing over the entire assembly ( Just like the red tubing in your photo)  and just use it as is. I deal with the crudeness of it.

             When I use the stock needle for free flight with a eyedropper, this is very problematic and the height of the dropper is critical, too high and you can't regulate the fuel flow because the fuel passes through the needle regardless of needle position. When running this isn't as much of a issue but prior to starting, it becomes somewhat necessary to pinch off the fuel line prior to starting to prevent the case from flooding.A more accurate needle is to use the Cox spraybar and JB weld it into the case, it offers better reliability and engine run consistency.

               The OK  engines were marketed $2-3 less than the competitors at the time. Therefore, placing high expectations on them isn't something that you should get carried away with. There's a reason for the lower cost, they were to fulfill a niche that was dedicated to the toy market and those initially interested in modeling. They did just that. They're neat and interesting but it can take a few of them to obtain one that's reliable and proves worthy of use.
Ken Cook
Ken Cook
Top Poster
Top Poster

Posts : 5444
Join date : 2012-03-27
Location : pennsylvania

Back to top Go down

The disappointing OK Cub - Page 2 Empty Re: The disappointing OK Cub

Post  Sponsored content


Sponsored content


Back to top Go down

Page 2 of 2 Previous  1, 2

Back to top

- Similar topics

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