Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


Cox 051 Piston SHAKEDOWN Cox_ba12




Cox 051 Piston SHAKEDOWN Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» My N-1R build log
by KariFS Today at 1:56 pm

» New Model Build
by bsadonkill Today at 11:31 am

» Project Cox .049 r/c & Citabrian Champion
by MauricioB Today at 10:49 am

» Octura engines?
by UncleLumpy Today at 8:16 am

» Tatone EM-7
by sosam117 Today at 7:50 am

» Honoring All Who Served
by roddie Yesterday at 8:59 pm

» Cox NaBOO - Just in time for Halloween
by rsv1cox Yesterday at 3:30 pm

» Free Flight Radio Assist
by TD ABUSER Yesterday at 1:41 pm

» Cox 020 PeeWee rebuild questions
by balogh Yesterday at 1:36 pm

» K&B .09 Torpedo Engine
by LooseSpinner99 Yesterday at 12:01 pm

» 3D printing of parts?
by UncleLumpy Yesterday at 9:08 am

» L4 Grasshopper
by bottomgun Yesterday at 7:58 am

Cox Engine of The Month
November-2024
Kim's

"A Space Bug Jr. pulls the Q-Tee up high over Sky Tiger Field"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


Cox 051 Piston SHAKEDOWN Empty
Live on Patrol


Cox 051 Piston SHAKEDOWN

Go down

Cox 051 Piston SHAKEDOWN Empty Cox 051 Piston SHAKEDOWN

Post  John Goddard Thu Mar 29, 2012 5:25 am

Ok Guys here we go.
This one of those 'why we need a Reference Library moments (again).......!
The first 3 shots are of my November 1975 051 which only had the wire untwisted for these photos's Sad
Hopefully you can see the Litho date on the bottom left of the manual.
Cox 051 Piston SHAKEDOWN Pictu105

Cox 051 Piston SHAKEDOWN Pictu106

Cox 051 Piston SHAKEDOWN Pictu107

The next 5 shots with my not cheap Blue Point Snap On calipers show that the skirt is indeed larger than the crown on a
75 TeeDee 051 Piston. Before anyone crys 'Foul' look closely and you'll see I''ve placed piston both ways up 'just in case'
the jaws are not parallel.

Cox 051 Piston SHAKEDOWN Pictu108

Cox 051 Piston SHAKEDOWN Pictu109

Cox 051 Piston SHAKEDOWN Pictu110

Cox 051 Piston SHAKEDOWN Pictu111

Cox 051 Piston SHAKEDOWN Pictu112

Lastly I thought you'd all like to see one of Toms NFFS 051 pistons that are what he's always said they were i.e.
completely cylindrical and not tapered.

Cox 051 Piston SHAKEDOWN Pictu113

Cox 051 Piston SHAKEDOWN Pictu114

I might get the scales out later
But

I think that's it for a while I need to Lay down for a bit DR Feelgood will be along with my medicine shortly...

lol!

John Goddard
John Goddard
Diamond Member
Diamond Member

Posts : 2447
Join date : 2011-11-24
Age : 60
Location : Leyton North East London

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

Post  engine049 Thu Mar 29, 2012 8:49 am

THAT'S MY BABY! Smile
engine049
engine049
Gold Member
Gold Member

Posts : 445
Join date : 2012-02-20
Age : 37
Location : GA

http://TreeTiger.com

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

Post  nitroairplane Thu Mar 29, 2012 9:17 am

There we go, proof!
nitroairplane
nitroairplane
Top Poster
Top Poster

Posts : 6956
Join date : 2011-04-11
Location : London

http://modeldieselengines.forumstopic.com/

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

Post  Surfer_kris Thu Mar 29, 2012 9:25 am

engine049 wrote:THAT'S MY BABY! Smile

So why are you selling tapered "NFFS 051 pistons" on ebay, if the originals were not tapered?
Surfer_kris
Surfer_kris
Diamond Member
Diamond Member

Posts : 1912
Join date : 2010-11-20
Location : Sweden

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

Post  PV Pilot Thu Mar 29, 2012 9:30 am

Funny, I have the same exact caliper, but without the fancy Blue Point sticker, which costs extra. Good calipers, with or without the sticker. I have double checked them against a multitude of others, including the Holy Grail of calipers,,$Starrett$.
PV Pilot
PV Pilot
High Tech Balsa Basher
High Tech Balsa Basher

Posts : 1854
Join date : 2011-08-11
Age : 57
Location : The ragged end of the Universe.

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

Post  WingingIt74 Thu Mar 29, 2012 9:40 am

Wouldn't it be better to get dimensions of the crown vs the skirt? I really couldn't see a difference.
WingingIt74
WingingIt74
Top Poster
Top Poster

Posts : 3189
Join date : 2011-08-11
Age : 50
Location : Waterloo, IL

https://www.facebook.com/wingingit74/

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

Post  SuperDave Thu Mar 29, 2012 10:10 am

Wing:

Fact is both the bore and the piston are tapered on both the TD .049 & .051. Ask Paul Gibeault.
SuperDave
SuperDave
Rest In Peace
Rest In Peace

Posts : 3552
Join date : 2011-08-13
Location : Washington (state)

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

Post  nitroairplane Thu Mar 29, 2012 10:13 am

SuperDave wrote:Wing:

Fact is both the bore and the piston are tapered on both the TD .049 & .051. Ask Paul Gibeault.
Yes tat is what I believe but it is only the early number 4 sets.
So only on early tee dee .049s.
nitroairplane
nitroairplane
Top Poster
Top Poster

Posts : 6956
Join date : 2011-04-11
Location : London

http://modeldieselengines.forumstopic.com/

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

Post  WingingIt74 Thu Mar 29, 2012 10:17 am

SuperDave wrote:Wing:

Fact is both the bore and the piston are tapered on both the TD .049 & .051. Ask Paul Gibeault.

OK, I'm lost.
WingingIt74
WingingIt74
Top Poster
Top Poster

Posts : 3189
Join date : 2011-08-11
Age : 50
Location : Waterloo, IL

https://www.facebook.com/wingingit74/

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

Post  John Goddard Thu Mar 29, 2012 10:49 am

WingingIt74 wrote:
SuperDave wrote:Wing:

Fact is both the bore and the piston are tapered on both the TD .049 & .051. Ask Paul Gibeault.

OK, I'm lost.

No worries Travis
The shots were to demonstrate that the TD piston when inserted between 2 parallel points would swing/pivot
from one end (ie the widest) and I've inverted it as well to show that the jaws were parallel and it swung/pivoted
from the same end.
As for measurements the Battery is 'somewhere' on the floor......
John Goddard
John Goddard
Diamond Member
Diamond Member

Posts : 2447
Join date : 2011-11-24
Age : 60
Location : Leyton North East London

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

Post  Cox International Thu Mar 29, 2012 10:54 am

We are in possession of the TD .049 drawings as well as drawings for several versions of the pistons and cylinders.

Cylinders were tapered until somewhere late 80's / early 90's. After that the #4 cylinders were not tapered.

Pistons in general were NOT tapered and, when they were, certainly not on the bottom. The ones that were tapered were not conical but rather had a "ring" at the top. Those were only made for a limited time.

NFFS .051 pistons are different than the TD and KB ones in that they have a bigger bore. They are untapered.

"Real" KB pistons are untapered but lightened.
Cox International
Cox International
Top Poster
Top Poster

Official Cox Dealer
Posts : 3378
Join date : 2011-08-08
Age : 66
Location : Williams Lake, BC, Canada

http://www.coxengines.com

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

Post  Cox International Thu Mar 29, 2012 11:07 am

John Goddard wrote:
WingingIt74 wrote:
SuperDave wrote:Wing:

Fact is both the bore and the piston are tapered on both the TD .049 & .051. Ask Paul Gibeault.

OK, I'm lost.

No worries Travis
The shots were to demonstrate that the TD piston when inserted between 2 parallel points would swing/pivot
from one end (ie the widest) and I've inverted it as well to show that the jaws were parallel and it swung/pivoted
from the same end.
As for measurements the Battery is 'somewhere' on the floor......

2 Reasons this can happen.

1) Piston wear
2) Manufacturing tolerances (.0001" length-wise)
Cox International
Cox International
Top Poster
Top Poster

Official Cox Dealer
Posts : 3378
Join date : 2011-08-08
Age : 66
Location : Williams Lake, BC, Canada

http://www.coxengines.com

Back to top Go down

Cox 051 Piston SHAKEDOWN Empty Re: Cox 051 Piston SHAKEDOWN

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