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Cox Engine of The Month
August-2024
balogh's
![](https://i.servimg.com/u/f95/15/46/86/41/1_balo14.jpg)
"Cox TD09 R/C Beast of Burden featuring Kamtechnik head and DIY metallic fuel nipple"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
balogh's
![](https://i.servimg.com/u/f95/15/46/86/41/1_balo14.jpg)
"Cox TD09 R/C Beast of Burden featuring Kamtechnik head and DIY metallic fuel nipple"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
TAPLIN TWIN 7ccm
Page 1 of 2
Page 1 of 2 • 1, 2
TAPLIN TWIN 7ccm
Good day everybody,
I'm Michael from Germany. I am 64 years old and have been working with model diesel engines since my youth, especially Taifun engines, which I restore and anodize myself.
I am also building a Webra 4 cylinder inline engine which you can see on You Tube.
I ride and love English motorcycles. BSA B33 1951 and TRITON Pre Unit 1956.
My question:
I am currently restoring a TAPLIN TWIN 7cc boat engine.
What thread size is used in this motor? Maybe some experts can help me.
Best regards
Michael
I'm Michael from Germany. I am 64 years old and have been working with model diesel engines since my youth, especially Taifun engines, which I restore and anodize myself.
I am also building a Webra 4 cylinder inline engine which you can see on You Tube.
I ride and love English motorcycles. BSA B33 1951 and TRITON Pre Unit 1956.
My question:
I am currently restoring a TAPLIN TWIN 7cc boat engine.
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
What thread size is used in this motor? Maybe some experts can help me.
Best regards
Michael
michaelherbst1- Moderate Poster
- Posts : 15
Join date : 2023-09-18
Re: TAPLIN TWIN 7ccm
Hello Michael,
welcome to COX Engine Forum.. (I am also 64 and from Hungary, and while I am a COX engine fan, back in my youth I also ran small diesels of Hungarian MOKI and similar. Plus I also ride a small Honda MSX 125 nowadays...so you will understand this is an international young-boy site
)
I have no information about the thread sizes you ask, but you may be interested in reading this article of Spectreflight, about the engine you are working on:
http://www.sceptreflight.com/Model%20Engine%20Tests/Taplin%20Twin%207cc.html
I trust this helps, regards András from Budapest.
welcome to COX Engine Forum.. (I am also 64 and from Hungary, and while I am a COX engine fan, back in my youth I also ran small diesels of Hungarian MOKI and similar. Plus I also ride a small Honda MSX 125 nowadays...so you will understand this is an international young-boy site
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
I have no information about the thread sizes you ask, but you may be interested in reading this article of Spectreflight, about the engine you are working on:
http://www.sceptreflight.com/Model%20Engine%20Tests/Taplin%20Twin%207cc.html
I trust this helps, regards András from Budapest.
balogh- Top Poster
Posts : 4852
Join date : 2011-11-06
Age : 65
Location : Budapest Hungary
Re: TAPLIN TWIN 7ccm
Try these people https://www.model-engineer.co.uk/ and there are interest here https://adriansmodelaeroengines.com/catalog/main.php?cat_id=3 you will have to dig for it , I looked on line with no luck for specs. There are a few people here that have this engine maybe they will chime in later so check back,, Welcome to the CEF
![Small Cox Logo](/users/3015/29/34/60/smiles/7356.png)
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
![Small Cox Logo](/users/3015/29/34/60/smiles/7356.png)
getback- Top Poster
Posts : 10326
Join date : 2013-01-18
Age : 67
Location : julian , NC
OVERLORD- Diamond Member
- Posts : 1799
Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: TAPLIN TWIN 7ccm
Thank you for the answers.
It must be a BA 6 thread.
I will post photos of my engines soon.
Thanks and best regards
Michael
It must be a BA 6 thread.
I will post photos of my engines soon.
Thanks and best regards
Michael
michaelherbst1- Moderate Poster
- Posts : 15
Join date : 2023-09-18
Re: TAPLIN TWIN 7ccm
I so hope to play with one of those one day!
robot797- Platinum Member
- Posts : 766
Join date : 2013-07-28
Age : 34
Re: TAPLIN TWIN 7ccm
Good day to all model engine enthusiasts,
Attached are photos of my restored TAIFUN engines, KRATMO 10, Felgiebel Boxer 2 x 7.5 cc, which I built myself. Then the WEBRA 4 cylinder, 4 x 6.5 cc, with two 180° rotary valves, is running very well at the moment. The first run can be seen on YOUTUBE. Enter Webra 4 cylinders, or Webra 120.
More pictures will follow.
Best regards
Michael![TAPLIN TWIN 7ccm Img_2014](https://i.servimg.com/u/f42/20/52/24/53/img_2014.jpg)
![TAPLIN TWIN 7ccm Img_2014](https://i.servimg.com/u/f42/20/52/24/53/img_2014.jpg)
![TAPLIN TWIN 7ccm Img_2015](https://i.servimg.com/u/f42/20/52/24/53/img_2015.jpg)
Attached are photos of my restored TAIFUN engines, KRATMO 10, Felgiebel Boxer 2 x 7.5 cc, which I built myself. Then the WEBRA 4 cylinder, 4 x 6.5 cc, with two 180° rotary valves, is running very well at the moment. The first run can be seen on YOUTUBE. Enter Webra 4 cylinders, or Webra 120.
More pictures will follow.
Best regards
Michael
![TAPLIN TWIN 7ccm Img_2014](https://i.servimg.com/u/f42/20/52/24/53/img_2014.jpg)
![TAPLIN TWIN 7ccm Img_2014](https://i.servimg.com/u/f42/20/52/24/53/img_2014.jpg)
![TAPLIN TWIN 7ccm Img_2015](https://i.servimg.com/u/f42/20/52/24/53/img_2015.jpg)
michaelherbst1- Moderate Poster
- Posts : 15
Join date : 2023-09-18
Twin
Hi Michael,
Lovely.....
You probably make your own screws etc. But may not know of "model fixings" a mail order supplier.
I will post later the exact web address later.
Please would you post a you tube link for your engine please.
Lovely.....
You probably make your own screws etc. But may not know of "model fixings" a mail order supplier.
I will post later the exact web address later.
Please would you post a you tube link for your engine please.
Coxfledgling- Gold Member
- Posts : 375
Join date : 2021-01-10
Location : Near Caernarfon, Snowdonia, Wales, UK
Re: TAPLIN TWIN 7ccm
Hello,
Attached is a photo of the disassembled Taplin Twin, everything looks good and usable, the pistons have good compression. The main crankshaft does not need to be disassembled as the bearings run freely and easily. The front bearing and the cylinder head screws need to be replaced, I will make them new. a good solid basis to bring the legendary engine back to life.
I'll post reports about the restoration, it'll just take a while because I'm working on a lot of other projects.
Many greetings, Michael![TAPLIN TWIN 7ccm Img_2016](https://i.servimg.com/u/f42/20/52/24/53/img_2016.jpg)
Attached is a photo of the disassembled Taplin Twin, everything looks good and usable, the pistons have good compression. The main crankshaft does not need to be disassembled as the bearings run freely and easily. The front bearing and the cylinder head screws need to be replaced, I will make them new. a good solid basis to bring the legendary engine back to life.
I'll post reports about the restoration, it'll just take a while because I'm working on a lot of other projects.
Many greetings, Michael
![TAPLIN TWIN 7ccm Img_2016](https://i.servimg.com/u/f42/20/52/24/53/img_2016.jpg)
michaelherbst1- Moderate Poster
- Posts : 15
Join date : 2023-09-18
Re: TAPLIN TWIN 7ccm
Very Nice collection you have Michael , glad the engine look good on the inside so when completed should make some air flow .
Good Day Sir
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
![Small Cox Logo](/users/3015/29/34/60/smiles/7356.png)
getback- Top Poster
Posts : 10326
Join date : 2013-01-18
Age : 67
Location : julian , NC
Ba
Modelfixings.co.uk
Coxfledgling- Gold Member
- Posts : 375
Join date : 2021-01-10
Location : Near Caernarfon, Snowdonia, Wales, UK
Re: TAPLIN TWIN 7ccm
Good morning,
Thank you very much for the feedback and the tips.
Here is the headline for the 4 cylinder Webra on YOUTUBE:
WEBRA 4 Zylinder 160, Reihenmotor, Selbsbau RC mit 26ccm. RC model 4-cylinder in line 2-stroke
Best regards
Michael
Thank you very much for the feedback and the tips.
Here is the headline for the 4 cylinder Webra on YOUTUBE:
WEBRA 4 Zylinder 160, Reihenmotor, Selbsbau RC mit 26ccm. RC model 4-cylinder in line 2-stroke
Best regards
Michael
michaelherbst1- Moderate Poster
- Posts : 15
Join date : 2023-09-18
Re: TAPLIN TWIN 7ccm
[quote="michaelherbst1"]Good morning,
Thank you very much for the feedback and the tips.
Here is the headline for the 4 cylinder Webra on YOUTUBE:
WEBRA 4 Zylinder 160, Reihenmotor, Selbsbau RC mit 26ccm. RC model 4-cylinder in line 2-stroke
Best regards
Michael
good morning
Thank you very much for the feedback and the tips.
Here is the headline for the 4 cylinder Webra on YOUTUBE:
WEBRA 4 Zylinder 160, Reihenmotor, Selbsbau RC mit 26ccm. RC model 4-cylinder in line 2-stroke
Best regards
Michael
good morning
getback- Top Poster
Posts : 10326
Join date : 2013-01-18
Age : 67
Location : julian , NC
Re: TAPLIN TWIN 7ccm
You have a very nice and unusual collection of engine Michael , hope you don't mine i put your video up for easy viewing . The inline 4 cylinder engine is amazing you built and seems to run pretty good swinging a big prop .
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
getback- Top Poster
Posts : 10326
Join date : 2013-01-18
Age : 67
Location : julian , NC
Re: TAPLIN TWIN 7ccm
good day everybody,
After dismantling I discovered that the ball bearings needed to be replaced.
these are the storage sizes:
Deep groove ball bearing inch R6 open
open version. without covers
Inside: 9.525mm
Outside: 22.225mm
Width: 5.558mm
greetings michael
After dismantling I discovered that the ball bearings needed to be replaced.
these are the storage sizes:
Deep groove ball bearing inch R6 open
open version. without covers
Inside: 9.525mm
Outside: 22.225mm
Width: 5.558mm
greetings michael
michaelherbst1- Moderate Poster
- Posts : 15
Join date : 2023-09-18
Re: TAPLIN TWIN 7ccm
That's easy to calculate. You need a 7/8 x 3/8 x 7/32 bearing.
OVERLORD- Diamond Member
- Posts : 1799
Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: TAPLIN TWIN 7ccm
I already ordered exactly yesterday.
Thank you
Thank you
michaelherbst1- Moderate Poster
- Posts : 15
Join date : 2023-09-18
Re: TAPLIN TWIN 7ccm
Good day everybody,
The attached photos show the individual parts of the TAPLIN TWIN before processing and after processing. The ball bearings had to be replaced. I made new compression toggles and also had to replace some 6BA screws. The engine has good compression and the counter pistons work well. I have to say: a very good, precise construction of English engineering.
Best regards
Michael![TAPLIN TWIN 7ccm Img_ta12](https://i.servimg.com/u/f42/20/52/24/53/img_ta12.jpg)
![TAPLIN TWIN 7ccm Img_ta13](https://i.servimg.com/u/f42/20/52/24/53/img_ta13.jpg)
The attached photos show the individual parts of the TAPLIN TWIN before processing and after processing. The ball bearings had to be replaced. I made new compression toggles and also had to replace some 6BA screws. The engine has good compression and the counter pistons work well. I have to say: a very good, precise construction of English engineering.
Best regards
Michael
![TAPLIN TWIN 7ccm Img_ta12](https://i.servimg.com/u/f42/20/52/24/53/img_ta12.jpg)
![TAPLIN TWIN 7ccm Img_ta13](https://i.servimg.com/u/f42/20/52/24/53/img_ta13.jpg)
michaelherbst1- Moderate Poster
- Posts : 15
Join date : 2023-09-18
Re: TAPLIN TWIN 7ccm
That looks great, Michael. How big is this engine dimension wise? I suppose the supporting bolt is an M5 or M6?
OVERLORD- Diamond Member
- Posts : 1799
Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: TAPLIN TWIN 7ccm
Hello OVERLORD,
yes it is M5 thread, above you can see a TAIFUN Hurricane 1.5 cc. The TAPLIN TWIN is very compact for a 7 cc twin engine.
Best regards
Michael
yes it is M5 thread, above you can see a TAIFUN Hurricane 1.5 cc. The TAPLIN TWIN is very compact for a 7 cc twin engine.
Best regards
Michael
michaelherbst1- Moderate Poster
- Posts : 15
Join date : 2023-09-18
Re: TAPLIN TWIN 7ccm
That look Great ! So there are 4 bearing in the engine , front rear , 2 in the middle ??
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
getback- Top Poster
Posts : 10326
Join date : 2013-01-18
Age : 67
Location : julian , NC
Re: TAPLIN TWIN 7ccm
Hello Eric,
There are 3 ball bearings, 2 for the crankshaft and one bearing for the front shaft where the flywheel or, in the aircraft engine, the propeller sits.
Greetings
Michael
There are 3 ball bearings, 2 for the crankshaft and one bearing for the front shaft where the flywheel or, in the aircraft engine, the propeller sits.
Greetings
Michael
michaelherbst1- Moderate Poster
- Posts : 15
Join date : 2023-09-18
Re: TAPLIN TWIN 7ccm
Thanks , its an interesting engine .
getback- Top Poster
Posts : 10326
Join date : 2013-01-18
Age : 67
Location : julian , NC
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![-](https://2img.net/i/empty.gif)
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» Cessna twin engines twin boom model
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» Taplin Twin .7cc
» taplin twin
» Cessna twin engines twin boom model
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