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

Logged in members see NO ADVERTISEMENTS!


Fuel Question Cox_ba12




Fuel Question Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Introducing the new - "QZ" RR-1
by Boats13 Today at 10:19 am

» STUKA bomb dimentions needed
by latole Today at 9:36 am

» Indexing COX cylinders
by davidll1984 Today at 7:56 am

» Another of C.T. engines cleaned ---- Cox Tee Dee .09 --- Just today (3/26/2024) more Cox parts
by Yabby Today at 7:47 am

» Introducing our Cox .049 TD Engines
by Yabby Today at 6:33 am

» 1/2a Skyray plans?
by 944_Jim Yesterday at 10:14 pm

» Postage stamp backplates
by JPvelo Yesterday at 8:52 pm

» my attempt at making an exhaust throttle for Cox .049
by roddie Yesterday at 8:20 pm

» Cosmic Winds, - Big Guy, Little Guys, Silver Guy and Wounded Guy.
by rsv1cox Yesterday at 5:18 pm

» My friend Ramón, his Cox .09 & Cox .010
by MauricioB Yesterday at 12:31 pm

» Parts Cox TD-4
by rsv1cox Yesterday at 8:40 am

» On ebay a very special Cox engine
by davidll1984 Yesterday at 6:32 am

Cox Engine of The Month
March-2024
balogh's

"COX Budapest" .049 engine



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


Fuel Question Empty
Live on Patrol


Fuel Question

Go down

Fuel Question Empty Fuel Question

Post  Cox 049. Thu May 03, 2012 1:55 pm

Hey everyone, I have no more fuel for my Cox engine so i was wondering will regular rc plane engine fuel work? I have heard you need specific amounts of oil and nitro for the engine to run if you could tell me that would be great. thanks. Small Cox Logo
Anonymous
Cox 049.
Guest


Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  nitroairplane Thu May 03, 2012 2:08 pm

Cox 049. wrote:Hey everyone, I have no more fuel for my Cox engine so i was wondering will regular rc plane engine fuel work? I have heard you need specific amounts of oil and nitro for the engine to run if you could tell me that would be great. thanks. Small Cox Logo
Nitro does not really matter but you need at least 20% oil and at least 1/2 of that must be castor oil.
But I recommend all of the 20% oil content be castor oil.
Around 25% nitro is nice.
nitroairplane
nitroairplane
Top Poster
Top Poster

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

http://modeldieselengines.forumstopic.com/

Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  Cox 049. Thu May 03, 2012 6:03 pm

Why must it be castor oil?
Anonymous
Cox 049.
Guest


Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  nitroairplane Thu May 03, 2012 6:09 pm

Cox 049. wrote:Why must it be castor oil?
Small engines need castle because it is the best lube for them. It doesn't burn off and without it the ball socket joints wear out and the engines have very soft cylinder and without castor oil they lose compression.
nitroairplane
nitroairplane
Top Poster
Top Poster

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

http://modeldieselengines.forumstopic.com/

Back to top Go down

Fuel Question Empty Re Fuel Question

Post  proctor Thu May 03, 2012 6:15 pm

Mostly because Cox recommend it and they knew their stuff.
Also because the ball and socket small end gets very hot and
synthetic will break down, castor won't.
If you want your Cox engines to last, use all castor. John
proctor
proctor
Gold Member
Gold Member

Posts : 199
Join date : 2012-01-31
Location : Scottish Highlands

Back to top Go down

Fuel Question Empty Re Fuel Question

Post  proctor Thu May 03, 2012 6:19 pm

nitroairplane wrote:
Cox 049. wrote:Why must it be castor oil?
Small engines need castle because it is the best lube for them. It doesn't burn off and without it the ball socket joints wear out and the engines have very soft cylinder and without castor oil they lose compression.

Sorry, didn't get a prompt that you had already posted an answer. John
proctor
proctor
Gold Member
Gold Member

Posts : 199
Join date : 2012-01-31
Location : Scottish Highlands

Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  Cox 049. Thu May 03, 2012 6:32 pm

Will this work? Brodak 10% nitro 11.5% castor oil and 11.5% synthetic oil, it says it s for Brodak engines, will this work with a cox?
Anonymous
Cox 049.
Guest


Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  dckrsn Thu May 03, 2012 9:06 pm

Sounds OK to me. At 10% nitro you're going
to be running somewhat tame.
Over 20%, and I'd add a little more castor.
Join the forum and use the search feature.
Welcome either way,
Bob
dckrsn
dckrsn
Diamond Member
Diamond Member

Posts : 2750
Join date : 2010-10-21
Age : 71
Location : Long Island, New York

Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  Cox 049. Thu May 03, 2012 9:46 pm

Would 10% nitro make a big difference in power? I haven't joined the forum cause I heard you get tons of e-mails to say your watching a topic.
Anonymous
Cox 049.
Guest


Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  andrew Thu May 03, 2012 11:47 pm

Cox 049. wrote:Would 10% nitro make a big difference in power? I haven't joined the forum cause I heard you get tons of e-mails to say your watching a topic.

First, email notification is a feature that may be disabled in your preferences. The only email I receive is when someone has sent a PM.

A good source for 1/2A fuel is GlowPlugBoy fuel. You can get 24% nitro/17% all castor fuel for $10 a quart. Shipping on the first quart is high, but additional quarts ship for $2.00 each. Two or three quarts of fuel will go a long way in 1/2A engines. The higher percentage nitro will improve power, but it also eases starting and tends to broaden the needle, i.e., the needle will be less difficult to set when tuning for peak or near peak RPM. Lower percentage nitro fuels can make the "sweet spot" more difficult to locate and maintain.

http://www.gcbmrc.com/GlowPlugBoy_prices.htm

SIG Manufacturing sells their Champion fuel in a 25/20 nitro/oil mix with a 50/50 synthetic/castor blend for $8.39 a quart..

Another option is to buy a high nitro/low oil content car fuel (I use Morgan's Sidewinder Pro 20/10 and 30/10), then add castor to bring the oil content to your desired level. I enjoy tinkering with fuel mixtures, but for the casual user, buying SIG or GlowPlugBoy fuel is probably the best approach.

andrew
andrew
andrew
Diamond Member
Diamond Member

Posts : 1807
Join date : 2011-08-11
Age : 76
Location : Western Kentucky

http://web2.murraystate.edu/andy.batts/ps/POWERSUPPLY.HTM

Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  SuperDave Fri May 04, 2012 9:37 am

Castor and synthetic oils serve two puposes in our Cox engines:

- they lubricate vital parts

- they assist in carrying away heat that would be destructive to the engine

Poor lubrication destroys engines.
SuperDave
SuperDave
Rest In Peace
Rest In Peace

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

Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  RknRusty Fri May 04, 2012 11:14 am

Ditto on the Glowplugboy. It runs better and smoother than anything including Sig in all of my engines. I add 1.3 ounces of dollar store Rexall castor oil to a quart to raise it to 20% oil. Just because I like running high engine speeds. He ships fast too. If you buy 4 quarts he told me he will make any custom mix you ask for.

_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!


My Hot Rock & Blues Playlist
RknRusty
RknRusty
Rest In Peace
Rest In Peace

Posts : 10869
Join date : 2011-08-10
Age : 68
Location : South Carolina, USA

Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  cox 049. Fri May 04, 2012 11:37 am

Okay thanks very much for the replies, I will check those fuels out. Small Cox Logo
Anonymous
cox 049.
Guest


Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  RknRusty Fri May 04, 2012 10:35 pm

You're welcome, I hope you'll join up with us.

_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!


My Hot Rock & Blues Playlist
RknRusty
RknRusty
Rest In Peace
Rest In Peace

Posts : 10869
Join date : 2011-08-10
Age : 68
Location : South Carolina, USA

Back to top Go down

Fuel Question Empty what fuel to use

Post  coxxoc Fri May 04, 2012 11:46 pm

Hi,

I own a Black Widow .049 and I use a fuel of medium nitro rating i.e. about 15% nitromethane,
25% Newton R castor-oil, and 60% methanol.

I hope this helps?

Mr G Beer Cheers
coxxoc
coxxoc
Gold Member
Gold Member

Posts : 115
Join date : 2012-05-03
Age : 63
Location : Australia

Back to top Go down

Fuel Question Empty Re: Fuel Question

Post  SuperDave Sat May 05, 2012 11:00 am

My Cox Black Widow's and TD .049's seem to thrive on SIG 25% nitro for general flying or, in the extreme, 35 when maximum erformance is desired. Never tried Glo-boy so can't realistically evaluate it.

Note: I tend to run larger rather tan smaller props depending on the aircraft.
SuperDave
SuperDave
Rest In Peace
Rest In Peace

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

Back to top Go down

Fuel Question Empty Re: Fuel Question

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