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Cox Engine of The Month
July-2024
robot797's
"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"
PAST WINNERS
robot797's
"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"
PAST WINNERS
New Cox Fuel Tank?
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Re: New Cox Fuel Tank?
Mine holds 5g of fuel so 7.2g ready to roll.
WTG a micro tank is born!!! What size tank is that a 10cc?
Have you done a weight check with fuel?
WTG a micro tank is born!!! What size tank is that a 10cc?
Have you done a weight check with fuel?
1/2A Nut- Top Poster
- Posts : 3464
Join date : 2013-10-20
Age : 60
Location : Brad in Texas
Re: New Cox Fuel Tank?
If you need really soft flexible silicone tubing for a clunk you might try the stuff we use on free flight timers. From Texas Timers- http://www.texastimers.com/
stevej- Gold Member
- Posts : 153
Join date : 2011-08-24
Age : 84
Location : Clovis, CA
Re: New Cox Fuel Tank?
Thank you Steve,
Thin walled tubing is a bit of a risk as I bury the tank for the life of the plane my tanks are used as former's and control the width of the fuselage. I glue the two fuselage sides to the tank then add the fire wall then pinch the back of the fuselage together add bottom sheeting with thick gap filling CA then add the top deck
there are no other former's. I use think ply 1/32nd on the sides and 1/64th on the top and bottom makes for a very strong smack proof light weight platform for the flying surfaces.
Today I put together another tank the 10cc weight is a bit less all around.
Long and narrow wish I had one on hand with the Lil Speedy build could have
gotten by with a faster lighter fuselage.
Thin walled tubing is a bit of a risk as I bury the tank for the life of the plane my tanks are used as former's and control the width of the fuselage. I glue the two fuselage sides to the tank then add the fire wall then pinch the back of the fuselage together add bottom sheeting with thick gap filling CA then add the top deck
there are no other former's. I use think ply 1/32nd on the sides and 1/64th on the top and bottom makes for a very strong smack proof light weight platform for the flying surfaces.
Today I put together another tank the 10cc weight is a bit less all around.
Long and narrow wish I had one on hand with the Lil Speedy build could have
gotten by with a faster lighter fuselage.
1/2A Nut- Top Poster
- Posts : 3464
Join date : 2013-10-20
Age : 60
Location : Brad in Texas
Re: New Cox Fuel Tank?
Hi, sorry to interrupt the post, but I wanted to ask if this video is yours.
Please be very useful to inform me as he made the basket speed control, very grateful!..Mauricio.-
Please be very useful to inform me as he made the basket speed control, very grateful!..Mauricio.-
MauricioB- Top Poster
- Posts : 3649
Join date : 2016-02-16
Age : 53
Location : ARG
Re: New Cox Fuel Tank?
Bagged up and taunting me to build new planes, nice to know I am ready to go upon a whim.
There are some small rubber stoppers for test tubes but the weight is more then twice of
what simple cork can provide.
Yes I made that vid under Amp Abuser just file or grind the skirt off the bottom of the cylinder and slip over
a DIY ring type throttle sleeve. Take your time and be careful not to mess up the threads.
Steel or aluminum tube will work the aluminum will seat in with a good fit to keep the weight down.
Will idle great and give you a simple way to fly 3ch Micro's TD .010 planes. Do not match the cylinder
exhaust ports your throttle sleeve ports will have to be a bit smaller length wise for it to idle well.
There are some small rubber stoppers for test tubes but the weight is more then twice of
what simple cork can provide.
Yes I made that vid under Amp Abuser just file or grind the skirt off the bottom of the cylinder and slip over
a DIY ring type throttle sleeve. Take your time and be careful not to mess up the threads.
Steel or aluminum tube will work the aluminum will seat in with a good fit to keep the weight down.
Will idle great and give you a simple way to fly 3ch Micro's TD .010 planes. Do not match the cylinder
exhaust ports your throttle sleeve ports will have to be a bit smaller length wise for it to idle well.
1/2A Nut- Top Poster
- Posts : 3464
Join date : 2013-10-20
Age : 60
Location : Brad in Texas
Re: New Cox Fuel Tank?
Hello, I do not understand your message, it is directed to me?
MauricioB- Top Poster
- Posts : 3649
Join date : 2016-02-16
Age : 53
Location : ARG
Re: New Cox Fuel Tank?
Two messages one about the fuel tanks and second paragraph is a response to your question about the throttle sleeve.
1/2A Nut- Top Poster
- Posts : 3464
Join date : 2013-10-20
Age : 60
Location : Brad in Texas
Re: New Cox Fuel Tank?
Sorry I do not speak English management by google translator. My question is if I offended him at some point?
MauricioB- Top Poster
- Posts : 3649
Join date : 2016-02-16
Age : 53
Location : ARG
Re: New Cox Fuel Tank?
ahhh agree now understand !. Can you put photos of the 010 rim regulation, could you tell me how to make one?...
MauricioB- Top Poster
- Posts : 3649
Join date : 2016-02-16
Age : 53
Location : ARG
Re: New Cox Fuel Tank?
Source:
9.3mm ID External Circlip
http://www.hjfasteners.com/product.asp?bascode=107&classcode=107102
K&S 10mm OD thick walled aluminum tube
10 x .89mm Heavy Wall Aluminum Tube from K&S Engineering.:
http://www.hobbylinc.com/htm/k+s/k+s9812.htm
Product Specifications
Length: 11.89 (302mm):
Diameter: 0.39 (10mm):
Hole Diameter: 0.29 (7.5mm):
Wall Thickness: 0.035 (.89mm)
K-S Product Number: 9812
Note OD of the cylinder is 8mm you will need to remove a hair
worth of the inside wall of the aluminum tube to slip into place
be patient and lap it in carefully for good fit. You can choose
to remove the black coating off the cylinder to speed up the fit.
Again, you must remove the skirt, file off carefully to avoid damage to the cylinder threads.
File or turn a shallow 9.75 mm OD groove for the Circlip to rest in.
You will need a snap tool or flat head screw driver to expand it out
over the 10mm OD tube and slide into place.
9.3mm ID External Circlip
http://www.hjfasteners.com/product.asp?bascode=107&classcode=107102
K&S 10mm OD thick walled aluminum tube
10 x .89mm Heavy Wall Aluminum Tube from K&S Engineering.:
http://www.hobbylinc.com/htm/k+s/k+s9812.htm
Product Specifications
Length: 11.89 (302mm):
Diameter: 0.39 (10mm):
Hole Diameter: 0.29 (7.5mm):
Wall Thickness: 0.035 (.89mm)
K-S Product Number: 9812
Note OD of the cylinder is 8mm you will need to remove a hair
worth of the inside wall of the aluminum tube to slip into place
be patient and lap it in carefully for good fit. You can choose
to remove the black coating off the cylinder to speed up the fit.
Again, you must remove the skirt, file off carefully to avoid damage to the cylinder threads.
File or turn a shallow 9.75 mm OD groove for the Circlip to rest in.
You will need a snap tool or flat head screw driver to expand it out
over the 10mm OD tube and slide into place.
1/2A Nut- Top Poster
- Posts : 3464
Join date : 2013-10-20
Age : 60
Location : Brad in Texas
Re: New Cox Fuel Tank?
1/2A Nut wrote:Here you go did up a 5cc for the TD .010 will give 4.5 to 5 mins of run time same tank size that's
in the 42k rpm NANO. I seal the inside cork wall with thick CA to insure no loose bits float into the
tank and the fuel line does not come loose inside the tank. Press fit into place with a final seal on the
outside to insure no leaks and help support the cork. Life time of tanks for under 15 bucks shipped.
I have done a handful of these now this way and no issues even after smacking / crashing the plane.
Use IV drip line type tube for the inside curve line, heat up a bit and shape the curve once cool it hardens and
holds it curve for life. Fuel flow and 2.2g weight is excellent! This lil duration tank is one and done in 15 min.
Sorry for bumping an old thread, but I want to ask that is gap filling CA dissolve in fuel? I did not use gap filling CA any yet.
Can I use RTV silicone (silicone rubber) instead of CA or epoxy glues against fuel leakage in long term use? I use %16 nitro fuel.
Levent Suberk- Diamond Member
- Posts : 2228
Join date : 2017-12-24
Location : Türkiye
Re: New Cox Fuel Tank?
Nitro dissolves CA pretty quick. Even 5% can dissolve CA if it is flooded. For assembling wood to wood this is normally not an issue even with ocassional fuel exposure as only the oil will stay in the wood.
With constant fuel exposure silicone rtv is pretty tolerant of nitro.
Phil
With constant fuel exposure silicone rtv is pretty tolerant of nitro.
Phil
pkrankow- Top Poster
- Posts : 3025
Join date : 2012-10-02
Location : Ohio
Re: New Cox Fuel Tank?
Hi Phil that is old pics from early testing mind you the tanks built with the pressed in
compressed cork are still working just fine and fly routinely in the NANO IV and
NANO II projects.
No leaks to date, however I have upgraded my tank designs using rubber stoppers
that require no sealing other than some heat shrink to keep the bung from migrating
from engine vibration etc. They are press fitted in place after drilling two holes for the
aluminum feed tubes. Here is a nice pic of the tank collection sizes I make now.
If anyone needs some tanks shoot me a message, I sell them ready to install.
compressed cork are still working just fine and fly routinely in the NANO IV and
NANO II projects.
No leaks to date, however I have upgraded my tank designs using rubber stoppers
that require no sealing other than some heat shrink to keep the bung from migrating
from engine vibration etc. They are press fitted in place after drilling two holes for the
aluminum feed tubes. Here is a nice pic of the tank collection sizes I make now.
If anyone needs some tanks shoot me a message, I sell them ready to install.
1/2A Nut- Top Poster
- Posts : 3464
Join date : 2013-10-20
Age : 60
Location : Brad in Texas
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