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!


Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
November-2017
MauricioB's

"Cox Tee Dee .010"



PAST WINNERS
Speed Contest 2018
CEF Traveling Engine

Gallery


Win This Engine!
The Traveling Prop
World of Aviation

Strange cylinder

Page 2 of 2 Previous  1, 2

View previous topic View next topic Go down

Thinking Re: Strange cylinder

Post  1/2A Nut on Thu Jan 14, 2016 9:27 pm

You can press fit a tight fitting sleeve over 2 slit 2 exhaust port standard cylinder and screw on the cylinder mark the location you want the exhaust port to face and cut out your single exhaust. Or do exactly what was done shown in the pics.



avatar
1/2A Nut
Diamond Member
Diamond Member

Posts : 1303
Join date : 2013-10-20
Age : 54
Location : Texas

View user profile

Back to top Go down

Thinking Re: Strange cylinder

Post  1/2A Nut on Thu Jan 14, 2016 9:32 pm

Here is my effort Small Cox Logo

avatar
1/2A Nut
Diamond Member
Diamond Member

Posts : 1303
Join date : 2013-10-20
Age : 54
Location : Texas

View user profile

Back to top Go down

Thinking Re: Strange cylinder

Post  crankbndr on Thu Jan 14, 2016 9:47 pm

Nice work, that's a really cool mod.
avatar
crankbndr
Diamond Member
Diamond Member

I Support My Forum

Posts : 2007
Join date : 2011-12-10
Location : Homestead FL

View user profile

Back to top Go down

Thinking Re: Strange cylinder

Post  roddie on Thu Jan 14, 2016 10:23 pm

Very cool indeed! Wondering if you used cylinder shims to index your single (open) exhaust-port straight back toward the pipe?
avatar
roddie
Top Poster
Top Poster

Posts : 5462
Join date : 2013-07-17
Age : 57
Location : N. Smithfield, Rhode Island

View user profile http://www.stilburnin.com

Back to top Go down

Thinking oh

Post  happydad on Thu Jan 14, 2016 10:41 pm

Admin wrote:
happydad wrote:
Admin wrote:

They pop up on eBay every few years and they don't sell for cheap.

Are those blank cylinders? Don't you have a smaller picture? lol!  I mean a close up of the cylinders?

happydad RC Plane           Futaba Radio Jeep < (RC car emoticon)


Not my picture, it's the only picture I have from an old eBay auction years ago.

You are forgiven. oh, and +1.

happydad RC Plane
avatar
happydad
Platinum Member
Platinum Member

I Support My Forum

Posts : 1158
Join date : 2012-05-28
Age : 72
Location : Escondido, CA

View user profile

Back to top Go down

Thinking Re: Strange cylinder

Post  1/2A Nut on Thu Jan 14, 2016 11:43 pm

Yes I bought cylinder shims from ebay to realign the exhaust port and blocked off the front port.
I then raised the timing by filing the top of the exhaust port from 140 deg stock to approx 162 deg.
I also ground down the bottom of the glow plug to recover compression from the cylinder shim.
Shims came in a pack of 4 two thin and two thick as I recall.


Profi Tuned Pipe TD RC .050 non SPI - 1st bench test
Tarno Carb, Cox buggy header pipe with half moon brass shim to block 1 exhaust port
#5 cylinder 2 bypass ports and 2 boost flutes per port -1 shim HC Cox Plug
Tad rich approx 85% to optimum break in mode with new #5 cylinder
- Idle with Tarno carb 12,116 rpm APC 4.5 x 4
- vid recorded 20,996 rpm on the pipe best noted 21,370 rpm 25% nitro
avatar
1/2A Nut
Diamond Member
Diamond Member

Posts : 1303
Join date : 2013-10-20
Age : 54
Location : Texas

View user profile

Back to top Go down

Thinking Blank cylinder

Post  Mike1484 on Fri Jan 15, 2016 8:15 am

I have one of the blank cylinders and a piston and rod . The cylinder is threaded on top and bottom as normal but the inside remains to be machined ( bored but not finished or ground ) . The piston looks to be a thin wall when compared to other pistons but that it just an eye ball look on my part . I can't recall where I picked it up but some of my old friends are speed flyers and might have come from one of them .

Mike 1484
avatar
Mike1484
Bronze Member
Bronze Member

Posts : 55
Join date : 2011-10-28
Location : Northern Ohio

View user profile

Back to top Go down

Thinking Re: Strange cylinder

Post  jsesere on Thu Feb 04, 2016 8:10 pm

I will have some Cox cylinder blanks. Please see post for info if you are not already following that thread.
https://www.coxengineforum.com/t9328-cox-part-lot#118861
avatar
jsesere
Rest In Peace
Rest In Peace

Trusted Seller
Posts : 1606
Join date : 2010-09-05
Location : Salem Oregon

View user profile

Back to top Go down

Thinking Re: Strange cylinder

Post  Sponsored content


Sponsored content


Back to top Go down

Page 2 of 2 Previous  1, 2

View previous topic View next topic Back to top

- Similar topics

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