40 cc Inline 4 Cylinder

[tonyengines]

much idea…. but nothing designs :-\ :-\

 

[tonyengines]

engine head :

 

[tonyengines]

engine head valve

 

[tonyengines]

crank and bearing

 

[nfk]

Nice project!
I don`t fully understand how your crank is being mounted, can you explain a bit the design?

Norberto

 

[mu38&Bg#]

It looks to be just like this one.

http://www.homemodelenginemachinist.com/index.php?topic=11253.msg123306#msg123306

 

[tonyengines]

It looks to be just like this one.

http://www.homemodelenginemachinist.com/index.php?topic=11253.msg123306#msg123306

your design is fantastic

I hope that my photos are useful :

 

[nfk]

So simple and so clever! :bow:
Thanks for the pics, they explain everything!

 

[coopertje]

Hi Tony,

Nice work on the engine, like that crank :bow:

Question, how did you make the seats for the crank bearings in the block? In the lathe with a boringbar, your mill, other? I have been thinking quite some time how to achieve a nice round boring in a relative long block.....

Keep the pics coming!!

Best regards Jeroen

 

[tonyengines]

Hi Tony,

Nice work on the engine, like that crank :bow:

Question, how did you make the seats for the crank bearings in the block? In the lathe with a boringbar, your mill, other? I have been thinking quite some time how to achieve a nice round boring in a relative long block.....

Keep the pics coming!!

Best regards Jeroen

I have booring in the lathe

 

[GailInNM]

Very nice work, Tony. I appreciate the clear descriptions of the operations in your thread.
Gail in NM

 

[coopertje]

Hi Tony,

Thanks for the clear explanation, it helps a lot! Nice tip of sacrificing an old tool bit holder and put that in the bar. I will keep this in mind when I will build my first multiple cylinder engine in some time.

I will be following along your build.

Best regards Jeroen

 

[kustomkb]

Great looking work as usual Tony!

Keep it up.

 

[tonyengines]

;Dthanks to all ;D

 

[cfellows]

Great looking engine! What's the bore and stroke?

Chuck

 

[tonyengines]

Great looking engine! What's the bore and stroke?

Chuck

Hi Chuck
bore 23.90 mm
stroke 23.00 mm

 

[nfk]

Tony, your engine is looking great! :bow:

 

[agmachado]

Hi Tony,

Very cool, When we have more news?

Take care,

Alexandre

 

[Tony64]

i'm ---tonyengines --- i can't recover my passwort now i'm Tony64

 

[Longboy]

Roller bearing cranks are an easy spin! Where is your engine these days?