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!


.09 Con Rod Hole Babe_b10
Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Happy Birthday Marleysky!
by Kim Today at 7:51 am

» DONE !!! [strike]Want to buy: A "barrel-throttle" Medallion .049[/strike]
by Kim Today at 6:45 am

» 5 x 3 propellers
by 1/2A Nut Today at 5:08 am

» Vapor Trails of days gone by!!!
by Dave P. Yesterday at 9:59 pm

» 1/2a Stealth Sport RC Plane
by NEW222 Yesterday at 9:45 pm

» 3D printed beam mount .049 backplate
by 1/2A Nut Yesterday at 9:24 pm

» Wanted 2 good front rims for my shrike
by David S Yesterday at 4:16 pm

» Prop hub nut
by jbanes1961 Mon Nov 11, 2019 10:16 pm

» Medallion 049/09 needle thread
by 944_Jim Mon Nov 11, 2019 8:33 pm

» More Engine Assembling/Testing. The second Tee Dee tank/mount arrives.
by 1/2A Nut Mon Nov 11, 2019 7:17 pm

Cox Engine of The Month
November-2019
jmcalata's

"Pee Wee .020 throttled combinated"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
The Traveling Prop
Gallery


.09 Con Rod Hole Empty
World of Aviation

.09 Con Rod Hole

Go down

.09 Con Rod Hole Empty .09 Con Rod Hole

Post  Iceberg on Tue Jun 18, 2019 8:50 pm

I have an .09 piston that the con rod has a small hole in it. I have seen them plugged before is this normal? If so why the different pistons?

.09 Con Rod Hole _09_co10

Thanks
Ice
Iceberg
Iceberg
Gold Member
Gold Member

Posts : 142
Join date : 2018-11-03
Location : Bangkapi Thailand

Back to top Go down

.09 Con Rod Hole Empty Re: .09 Con Rod Hole

Post  balogh on Wed Jun 19, 2019 12:49 am

Ice it is the first production runs of 049 and 09 TeeDee-s that came with that oiling hole. COX later may have recognized that the lubrication of crankpin is equally good without this hole and abandoned it to save manufacturing costs.

I was wondering if the large end of the rod with this oiling hole had a bit smaller diameter eye for the pin for a tighter pin to rod fit, that was also increased when the hole was abandoned, in order to facilitate the access of oil in between the pin and the eye, but I cannot measure such tiny differences if there is any at all. At least the pin to rod fit looks visually tighter in my old stock 049 TeeDees with the oiling hole on them.
balogh
balogh
Diamond Member
Diamond Member

Posts : 2475
Join date : 2011-11-06
Age : 61
Location : Budapest Hungary

Back to top Go down

.09 Con Rod Hole Empty Re: .09 Con Rod Hole

Post  Iceberg on Wed Jun 19, 2019 1:05 am

Thanks Balogh!
Good explanation.

The Piston you sent hadn't arrived. Hopefully soon. I'll be in touch via PM.

Ice
Iceberg
Iceberg
Gold Member
Gold Member

Posts : 142
Join date : 2018-11-03
Location : Bangkapi Thailand

Back to top Go down

.09 Con Rod Hole Empty Re: .09 Con Rod Hole

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top


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