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

Latest topics
» Cox .020 Skycopter fuel tank replacement
by NEW222 Yesterday at 11:08 pm

» Vintage U control tether car
by Mark Boesen Yesterday at 10:32 pm

» If you thought that USPS was bad ...
by 944_Jim Yesterday at 8:53 pm

» The new W-196 arrives......finally
by crankbndr Yesterday at 8:42 pm

» Ronnie's engines
by Cribbs74 Yesterday at 8:27 pm

» Out of ideas - Help :(
by roddie Yesterday at 8:08 pm

» Cox Engine Forum Speed Contest 2018!!!
by getback Yesterday at 5:17 pm

» .010 Freeflight
by Ken Cook Yesterday at 4:55 pm

» CEF Honors All Who Served
by GallopingGhostler Yesterday at 1:16 pm

» Question re. Helldiver fuel tank
by Cox International Yesterday at 11:31 am

Cox Engine of The Month
November-2018
1/2A Nut's

"Speedy Teedy .020"



PAST WINNERS
Speed Contest 2018
CEF Traveling Engine

Win This Engine!
The Traveling Prop
Gallery


World of Aviation

Aluminium fuel tanks for Cox Tee Dee .010 & .020

Page 5 of 6 Previous  1, 2, 3, 4, 5, 6  Next

Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  balogh on Sat Jun 23, 2018 6:32 pm

Mauricio for Android phones you can download the free RPM Gauge application from the Play store:
avatar
balogh
Diamond Member
Diamond Member

Posts : 1976
Join date : 2011-11-06
Age : 60
Location : Budapest

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  MauricioB on Sat Jun 23, 2018 10:05 pm

Thank you very much András, download the application! I already have it on my cell phone!
Thanks again! cheers Thumbs Up






avatar
MauricioB
Diamond Member
Diamond Member

Posts : 1772
Join date : 2016-02-16
Age : 47

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  1/2A Nut on Sun Jun 24, 2018 12:52 am

I have put together the TD .020 tank version. There was a issue with the small O
ring fitting inside the crank case. Perhaps after anodizing the tolerances are off
enough to cause pinching of the O ring and potential leaks. The O ring was oiled
and carefully assembled I tried to shove it in with a thin guitar pic it just would
not stay inside the crank case as I evenly tighten down the tank screws. Took
it apart and tried rolled the O ring added more oil no luck so just did my best
and tightened it down and did a leak test here are the results.




Filled the tank up wiped it all down let it sit for a few mins here are the results:
I will have to order another O ring kit for the TD .020 and try again.


I use 1/2oz tanks with my TD .020's pulling the fuel out shows how much it holds in represented bottle.
This is a good amount of fuel over the stock tank kudos!


The O ring fits flush to the base of the fuel tank face this is the problem is allows migration.
I recommend a sight design change as shown in this example the O ring has separation from
the front face of the back wall and can not migrate out when the screws are tightened.
This works very well from my use with TD .010's and .020's backplates no O ring leaks nor pinching of the rubber.


Here are my weight findings no fuel vs fueled.


I did buy a .020 carb body just to have in case I want to use a spring starter typically
I start this size and up with elect 1/2A starters.
And the two Silver Surfers together:




AmpAbuser
Published on Jun 24, 2018

TD .020 CNC Fuel Tank Test / 3.75 x 3 Prop
Peak to 20,994 rpm / 3.94oz thrust / .039w / 29w /60mph pitch speed
Small Cox Logo RC Plane Small Cox Logo


Last edited by 1/2A Nut on Sun Jun 24, 2018 1:02 pm; edited 6 times in total
avatar
1/2A Nut
Diamond Member
Diamond Member

Posts : 1976
Join date : 2013-10-20
Age : 55
Location : Brad in Texas

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  balogh on Sun Jun 24, 2018 1:02 am

If you run RPM Gauge on a split screen of your phone together with a video on a flight or a bench run , you can measure the engine rpm on-line.
avatar
balogh
Diamond Member
Diamond Member

Posts : 1976
Join date : 2011-11-06
Age : 60
Location : Budapest

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Cox International on Mon Jun 25, 2018 11:00 am

1/2A Nut,

Sorry to hear of your troubles.

Our vendor said he tested the setup for leaks and could not see any. We don't have any 020 tanks left for us to check this but will pass along your suggestion in regards to recessing the seal.
avatar
Cox International
Diamond Member
Diamond Member

Official Cox Dealer
Posts : 2653
Join date : 2011-08-08
Age : 60
Location : Williams Lake, BC, Canada

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

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Cox International on Mon Jun 25, 2018 11:09 am

Forgot to mention that we are in the process of sourcing 0-rings (they are all metric lol) and we will get you a gasket kit when available.
avatar
Cox International
Diamond Member
Diamond Member

Official Cox Dealer
Posts : 2653
Join date : 2011-08-08
Age : 60
Location : Williams Lake, BC, Canada

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

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  1/2A Nut on Mon Jun 25, 2018 11:38 am

Thank you Bernie, yes slight recess off the wall of the tank will stop the O ring from migrating.
Also can you confirm the size allen head wrench for the rear plate screw on the fuel tank?  
I used a .05 hex key, seemed to have a lil play in it, was a new fresh key / first time use.  
Perhaps it is a metric screw?
avatar
1/2A Nut
Diamond Member
Diamond Member

Posts : 1976
Join date : 2013-10-20
Age : 55
Location : Brad in Texas

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Cox International on Mon Jun 25, 2018 11:46 am

Yep, everything Metric aside from the four 2-56 screws. The backplate screw is a M2-15 and takes a 1.3mm wrench.

Having a field day trying to source all the Metric parts and will mostly be from eBay / China.
avatar
Cox International
Diamond Member
Diamond Member

Official Cox Dealer
Posts : 2653
Join date : 2011-08-08
Age : 60
Location : Williams Lake, BC, Canada

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

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  1/2A Nut on Mon Jun 25, 2018 12:38 pm

Good to know, the 1.5M is more common / most folks have that in their key set.
I will source a 1.3M to insure I have torqued down the screw good and tight to
hold up to engine vibrations. Your vendor should consider setting up the fill / over
fill tubes like stunt tanks for rolls / inverted flight / hammer head stalls etc.

avatar
1/2A Nut
Diamond Member
Diamond Member

Posts : 1976
Join date : 2013-10-20
Age : 55
Location : Brad in Texas

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Cox International on Mon Jun 25, 2018 12:59 pm

Good suggestion and will pass it along.

avatar
Cox International
Diamond Member
Diamond Member

Official Cox Dealer
Posts : 2653
Join date : 2011-08-08
Age : 60
Location : Williams Lake, BC, Canada

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

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  getback on Tue Jun 26, 2018 10:38 am

Good test Brad , and to see where a problem is and to afix it before i pull the trigger on some these . 1.3 mm is off from what i have and for .20c more could bee added to the package being its odd here in the states. Huh... Two Cents
avatar
getback
Top Poster
Top Poster

Posts : 5071
Join date : 2013-01-18
Age : 61
Location : julian

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  1/2A Nut on Tue Jun 26, 2018 3:14 pm

Thank you Eric! Thumbs Up

You can get the 1.3M allen wrench key on ebay for a couple of bucks, I have one in the mail on the way.
Same size is needed for the TD .010 tank too. I like these tanks for bench testing props all ready to go
in one piece. Will still use the nylon tanks for flying but may do up a sport design to suit one of the tanks for fun.
It's all about the fun and joy of the components, designing, building and flying that makes the hobby special.

Small Cox Logo RC Plane Small Cox Logo
avatar
1/2A Nut
Diamond Member
Diamond Member

Posts : 1976
Join date : 2013-10-20
Age : 55
Location : Brad in Texas

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Cox International on Tue Jun 26, 2018 3:19 pm

When we run production again we will switch to a slot-head for the backplate screw.
avatar
Cox International
Diamond Member
Diamond Member

Official Cox Dealer
Posts : 2653
Join date : 2011-08-08
Age : 60
Location : Williams Lake, BC, Canada

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

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Jason_WI on Tue Jun 26, 2018 4:22 pm

I used a .050” allen wrench for the backplate screw. It is a bit loose but fit tight enough to tighten the screw.
avatar
Jason_WI
Diamond Member
Diamond Member

I Support My Forum

Posts : 2319
Join date : 2011-10-09
Age : 43
Location : Neenah, WI

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  ffkiwi on Wed Jul 11, 2018 6:02 am

Any indicative time for availability of the next batch?-I will take several of each size.

ChrisM
'ffkiwi'
avatar
ffkiwi
Moderate Poster
Moderate Poster

Posts : 14
Join date : 2018-07-10
Location : Wellington, NZ

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Cox International on Wed Jul 18, 2018 2:28 pm

Sorry, just got back from a camping trip Smile

Probably in 2-3 weeks from now but will have to check how many are still available after pre-orders.
avatar
Cox International
Diamond Member
Diamond Member

Official Cox Dealer
Posts : 2653
Join date : 2011-08-08
Age : 60
Location : Williams Lake, BC, Canada

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

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Cox International on Fri Jul 20, 2018 6:32 pm

We have received our next shipment of the carb bodies and tanks and have listed what is not presold here: www.coxengines.com Sorry, silver was all spoken for.
avatar
Cox International
Diamond Member
Diamond Member

Official Cox Dealer
Posts : 2653
Join date : 2011-08-08
Age : 60
Location : Williams Lake, BC, Canada

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

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  1/2A Nut on Fri Jul 20, 2018 7:53 pm

Hi Bernie, did he send any replacement TD .020 / O rings?

Small Cox Logo RC Plane
avatar
1/2A Nut
Diamond Member
Diamond Member

Posts : 1976
Join date : 2013-10-20
Age : 55
Location : Brad in Texas

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Cox International on Fri Jul 20, 2018 9:49 pm

1/2A Nut wrote:Hi Bernie, did he send any replacement TD .020 / O rings?

Small Cox Logo RC Plane

No but we have ordered them from a USA vendor and should have them in a couple of weeks.
avatar
Cox International
Diamond Member
Diamond Member

Official Cox Dealer
Posts : 2653
Join date : 2011-08-08
Age : 60
Location : Williams Lake, BC, Canada

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

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  1/2A Nut on Sat Jul 21, 2018 2:30 am

Great thank you Bernie!!

Thumbs Up
avatar
1/2A Nut
Diamond Member
Diamond Member

Posts : 1976
Join date : 2013-10-20
Age : 55
Location : Brad in Texas

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Geist Flieger on Mon Jul 23, 2018 11:01 am

Just ordered the both sets for the 010 & 020. Do I need a 1.3 mm allen key or has Bernie switched to a slotted screw for the back or the tank?
avatar
Geist Flieger
Gold Member
Gold Member

Posts : 111
Join date : 2014-10-22
Location : Webb City, Mo

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Cox International on Mon Jul 23, 2018 11:09 am

Thanks for the order and this batch still uses the 1.3mm hex key.
avatar
Cox International
Diamond Member
Diamond Member

Official Cox Dealer
Posts : 2653
Join date : 2011-08-08
Age : 60
Location : Williams Lake, BC, Canada

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

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Cox International on Mon Jul 23, 2018 5:46 pm

We almost sold out over the weekend. Only these left in stock (all in red):

Two .010 Fuel tanks
One .020 Carb body
One .020 Fuel tank

avatar
Cox International
Diamond Member
Diamond Member

Official Cox Dealer
Posts : 2653
Join date : 2011-08-08
Age : 60
Location : Williams Lake, BC, Canada

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

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Cox International on Tue Aug 07, 2018 3:11 pm

1/2A nut, can you please identify yourself to us so that we can send you the replacement O-rings? A screen name does not always correlate to a real name lol.

avatar
Cox International
Diamond Member
Diamond Member

Official Cox Dealer
Posts : 2653
Join date : 2011-08-08
Age : 60
Location : Williams Lake, BC, Canada

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

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  1/2A Nut on Tue Aug 07, 2018 7:24 pm

Yes thank you Bernie, email sent per your link with the full contact info.

Small Cox Logo RC Plane Small Cox Logo
avatar
1/2A Nut
Diamond Member
Diamond Member

Posts : 1976
Join date : 2013-10-20
Age : 55
Location : Brad in Texas

View user profile

Back to top Go down

Re: Aluminium fuel tanks for Cox Tee Dee .010 & .020

Post  Sponsored content


Sponsored content


Back to top Go down

Page 5 of 6 Previous  1, 2, 3, 4, 5, 6  Next

Back to top

- Similar topics

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