Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


rod/piston connecting Babe_b10
Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
June-2019
robot797's

"cox 049 gasoline"

More info on this engine!



PAST WINNERS
Speed Contest 2019
CEF Traveling Engine

Win This Engine!
The Traveling Prop
Gallery


rod/piston connecting Empty
World of Aviation

rod/piston connecting

Go down

rod/piston connecting Empty rod/piston connecting

Post  chris74100 on Fri Aug 17, 2012 6:49 am

Hi, i'm frenche, sorry fbut i speak very poor english. It s possible to disassemble the piston rod in a 049 cox ? I want machining twins and I do not know how the rod is fixed in the piston.
My new engine is a .122 CI same the g mark engine (the cylinder of he cox is very too small for machining with my lathe and my milling machine)
If you are pics it's better for me.
Very thanks
chris74100
chris74100
Silver Member
Silver Member

Posts : 66
Join date : 2012-08-17
Age : 50
Location : ANNEMASSE (FRANCE)

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  gcb on Fri Aug 17, 2012 7:33 am

Chris,

The piston has the rod installed by stamping them together at the factory. It is a ball and socket arrangement with the socket on the bottom side of the piston stamped around the ball that is on the upper end of the connecting rod.

George
gcb
gcb
Platinum Member
Platinum Member

Posts : 908
Join date : 2011-08-11
Location : Port Ewen, NY

View user profile

Back to top Go down

rod/piston connecting Empty tooling

Post  frog349 on Fri Aug 17, 2012 10:12 am

Im a fitter turner as well operating cnc and nothing is too small!grind a b/bar out of a piece of hss and hold it in a collet if you dont have a b/bar small enough or a 'u'drill (ie a tap if you have no round hss). and g40/g41/g42 becomes your friend when writing in iso!Cheers Troy.
frog349
frog349
New Member
New Member

Posts : 3
Join date : 2012-08-16
Age : 38
Location : australia

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  RknRusty on Fri Aug 17, 2012 10:30 am

chris74100 wrote:If you are pics it's better for me.
Very thanks
This picture gives a pretty good view of the piston, rod and ball socket.
rod/piston connecting Cox_td_section_large

_________________
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
Moderator

Posts : 10751
Join date : 2011-08-10
Age : 63
Location : South Carolina, USA

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  chris74100 on Fri Aug 17, 2012 10:59 am

thank you for your answers but it will be difficult to make oneself
chris74100
chris74100
Silver Member
Silver Member

Posts : 66
Join date : 2012-08-17
Age : 50
Location : ANNEMASSE (FRANCE)

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  ahrma_581 on Fri Aug 17, 2012 11:11 am

Yes, it will be difficult, but it is the difficult things that are worth doing.

Like putting Monokote on a STOL wingtip. Mad

Please post pictures as your project progresses.
ahrma_581
ahrma_581
Gold Member
Gold Member

Posts : 290
Join date : 2012-03-21
Location : Sonoran desert

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  chris74100 on Fri Aug 17, 2012 11:19 am

no problems, but the next engine will be a little bigger, same a OS 10,or the cox 0.9 it will be a little easier to machining.
It's a similar in the 0.9 cox engine ?
chris74100
chris74100
Silver Member
Silver Member

Posts : 66
Join date : 2012-08-17
Age : 50
Location : ANNEMASSE (FRANCE)

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  chris74100 on Fri Aug 17, 2012 11:44 am

frog349 wrote:Im a fitter turner as well operating cnc and nothing is too small!grind a b/bar out of a piece of hss and hold it in a collet if you dont have a b/bar small enough or a 'u'drill (ie a tap if you have no round hss). and g40/g41/g42 becomes your friend when writing in iso!Cheers Troy.

Yes but my cnc is very small it's a X2 it's not a industrial cnc ,I made ​​it myself, but the next one will be bigger and more accurate.And im not a turner it is just my hobbie

THE CURRENT MILL
rod/piston connecting THE CURRENT MILL

the lathe
rod/piston connecting 00617

the next mill under construction

rod/piston connecting 00230

my workshop

rod/piston connecting 00132rod/piston connecting 00239rod/piston connecting 00337
chris74100
chris74100
Silver Member
Silver Member

Posts : 66
Join date : 2012-08-17
Age : 50
Location : ANNEMASSE (FRANCE)

View user profile

Back to top Go down

rod/piston connecting Empty re: cox twin

Post  happydad on Fri Aug 17, 2012 4:58 pm

chris74100 wrote:Hi, i'm frenche, sorry fbut i speak very poor english. It s possible to disassemble the piston rod in a 049 cox ? I want machining twins and I do not know how the rod is fixed in the piston.
My new engine is a .122 CI same the g mark engine (the cylinder of he cox is very too small for machining with my lathe and my milling machine)
If you are pics it's better for me.
Very thanks
chris74100: is your plan to machine the entire engine? why not start with the pistons and machine the other parts for the first prototype? or pistons and cylinders and machine whatever parts you will need to complete the rest. the pistons, cylinders, crankshafts, and crankcases are readily available in the U.S., England and Germany. and if you need any help finding or getting parts feel free to ask. most of the vendors who advertise here ship worldwide.
also there is an older 3 - part piston from the early 1960's discussed and shown in other discussions here. i think it has a circular clip holding a plate holding the connecting rod into a cup in the piston head. not too many were made.


happydad Small Cox Logo

Futaba Radio RC Plane
happydad
happydad
Platinum Member
Platinum Member

I Support My Forum

Posts : 1158
Join date : 2012-05-28
Age : 73
Location : Escondido, CA

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  lousyflyer on Fri Aug 17, 2012 6:47 pm

That is a very nice shop.
lousyflyer
lousyflyer
Gold Member
Gold Member

Posts : 342
Join date : 2012-06-25
Age : 59
Location : Garden City Ga

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  gcb on Sat Aug 18, 2012 7:31 am

Chris,

You have a very nice shop. Of the tools you display, I know how to use the vise. :-)

Don't worry about your poor English, you write much better English than I do French. We can understand what you are saying.

If you do an online search, there are groups of machinists who build small engines and could probably give you more ideas and information.

The G-Mark was an excellent engine.

Good luck with your project. Keep us posted.

George
gcb
gcb
Platinum Member
Platinum Member

Posts : 908
Join date : 2011-08-11
Location : Port Ewen, NY

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  chris74100 on Sat Aug 18, 2012 12:51 pm

happydad wrote:
chris74100: is your plan to machine the entire engine? why not start with the pistons and machine the other parts for the first prototype? or pistons and cylinders and machine whatever parts you will need to complete the rest. the pistons, cylinders, crankshafts, and crankcases are readily available in the U.S., England and Germany. and if you need any help finding or getting parts feel free to ask. most of the vendors who advertise here ship worldwide.
also there is an older 3 - part piston from the early 1960's discussed and shown in other discussions here. i think it has a circular clip holding a plate holding the connecting rod into a cup in the piston head. not too many were made.


happydad Small Cox Logo

Futaba Radio RC Plane

the piston and cylinder parts are the most difficult to machine and therefore the most interesting.
Buy these items get a lot of interest in the manufacture of motor
chris74100
chris74100
Silver Member
Silver Member

Posts : 66
Join date : 2012-08-17
Age : 50
Location : ANNEMASSE (FRANCE)

View user profile

Back to top Go down

rod/piston connecting Empty re: 3 part piston

Post  happydad on Sat Aug 18, 2012 4:18 pm

chris74100 wrote:
happydad wrote:
chris74100: is your plan to machine the entire engine? why not start with the pistons and machine the other parts for the first prototype? or pistons and cylinders and machine whatever parts you will need to complete the rest. the pistons, cylinders, crankshafts, and crankcases are readily available in the U.S., England and Germany. and if you need any help finding or getting parts feel free to ask. most of the vendors who advertise here ship worldwide.
also there is an older 3 - part piston from the early 1960's discussed and shown in other discussions here. i think it has a circular clip holding a plate holding the connecting rod into a cup in the piston head. not too many were made.


happydad Small Cox Logo

Futaba Radio RC Plane

the piston and cylinder parts are the most difficult to machine and therefore the most interesting.
Buy these items get a lot of interest in the manufacture of motor

search for "3 part piston" and see this pic. there is also an explanation.

rod/piston connecting Img_0610

hope this helps.

happydad Small Cox Logo

Futaba Radio RC Plane
happydad
happydad
Platinum Member
Platinum Member

I Support My Forum

Posts : 1158
Join date : 2012-05-28
Age : 73
Location : Escondido, CA

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  chris74100 on Sun Aug 19, 2012 3:24 am

happydad wrote:
why not start with the pistons and machine the other parts for the first prototype? or pistons and cylinders and machine whatever parts you will need to complete the rest. the pistons, cylinders, crankshafts, and crankcases are readily available in the U.S., England and Germany. and if you need any help finding or getting parts feel free to ask. most of the vendors who advertise here ship worldwide.
also there is an older 3 - part piston from the early 1960's discussed and shown in other discussions here. i think it has a circular clip holding a plate holding the connecting rod into a cup in the piston head. not too many were made.


happydad Small Cox Logo

Futaba Radio RC Plane

I reflected well and you are right, I am buy 2 piston and 2 cylinders and I am make a twin. I machining the crankshaft and the "body"(crankcase ?) of the motor. the fuel tank is same at the babe bee with the reed valve. know you the screw thread of the cylinder ?
chris74100
chris74100
Silver Member
Silver Member

Posts : 66
Join date : 2012-08-17
Age : 50
Location : ANNEMASSE (FRANCE)

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  Jason_WI on Sun Aug 19, 2012 3:32 am

17/32-40 is for the .049 head and cylinder.
Jason_WI
Jason_WI
Diamond Member
Diamond Member

I Support My Forum

Posts : 2645
Join date : 2011-10-09
Age : 43
Location : Neenah, WI

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

Post  chris74100 on Sun Aug 19, 2012 3:37 am

Jason_WI wrote:17/32-40 is for the .049 head and cylinder.

Thanks, it's a very fine thread, i supposed no tap exist ?

I think make the crakshaft as gmark, I find that's a very good idea and it's no dificult to machining

rod/piston connecting Hb80228
chris74100
chris74100
Silver Member
Silver Member

Posts : 66
Join date : 2012-08-17
Age : 50
Location : ANNEMASSE (FRANCE)

View user profile

Back to top Go down

rod/piston connecting Empty Re: rod/piston connecting

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