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by rdw777 Tue Sep 26, 2023 2:21 pm
Cox Engine of The Month
September-2023
balogh's

"Beefed up old stock 290 on my Quickie100 RC after plenty of airtime hours..."

PAST WINNERS
balogh's

"Beefed up old stock 290 on my Quickie100 RC after plenty of airtime hours..."

PAST WINNERS
TAPLIN TWIN 7ccm
Page 1 of 1
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.

What thread size is used in this motor? Maybe some experts can help me.
Best regards
Michael
michaelherbst1- Beginner Poster
- Posts : 8
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

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 : 4556
Join date : 2011-11-06
Age : 64
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



getback- Top Poster
Posts : 9730
Join date : 2013-01-18
Age : 66
Location : julian , NC
OVERLORD- Diamond Member
- Posts : 1706
Join date : 2013-03-19
Age : 57
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- Beginner Poster
- Posts : 8
Join date : 2023-09-18
Re: TAPLIN TWIN 7ccm
I so hope to play with one of those one day!
robot797- Platinum Member
- Posts : 685
Join date : 2013-07-28
Age : 33
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


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



michaelherbst1- Beginner Poster
- Posts : 8
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 : 351
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
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

michaelherbst1- Beginner Poster
- Posts : 8
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


getback- Top Poster
Posts : 9730
Join date : 2013-01-18
Age : 66
Location : julian , NC
Ba
Modelfixings.co.uk
Coxfledgling- Gold Member
- Posts : 351
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- Beginner Poster
- Posts : 8
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 : 9730
Join date : 2013-01-18
Age : 66
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 .

getback- Top Poster
Posts : 9730
Join date : 2013-01-18
Age : 66
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- Beginner Poster
- Posts : 8
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 : 1706
Join date : 2013-03-19
Age : 57
Location : Normandy, France
Re: TAPLIN TWIN 7ccm
I already ordered exactly yesterday.
Thank you
Thank you
michaelherbst1- Beginner Poster
- Posts : 8
Join date : 2023-09-18

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