HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Aug 15, 2012, 06:16 PM
Registered User
Joined Aug 2012
3 Posts
Discussion
cox model fuels

I live in the uk and am new to cox engines and have seen this one would this be suitable for a begginer.
Also i would like advice on fuel, low nitro about 15%, and just some cheap fuel for playing about with but seems to be in either bulk or very expensive!
Would this fuel be ok for the engine or with added castor oil?
thanks luke
luke.w.pc is offline Find More Posts by luke.w.pc
Reply With Quote
Sign up now
to remove ads between posts
Old Aug 15, 2012, 06:28 PM
Cox Engine Hoarder
Jason_WI's Avatar
Neenah, Wisconsin, United States
Joined Jun 2004
571 Posts
I would start with 25% car fuel then add castor to bring the total oil content up to 22%. You will have a much better needle responce with the higher nitro fuel.

Cox international has a fuel calculator link in the PDF link below:

http://coxengines.ca/files/FG.pdf

Jason
Jason_WI is online now Find More Posts by Jason_WI
Last edited by Jason_WI; Aug 15, 2012 at 06:37 PM. Reason: added link
Reply With Quote
Old Aug 16, 2012, 12:17 AM
Registered User
Joined Jun 2011
1,546 Posts
Little engines give off their heat quickly and need high nitro fuel. Cox fuel was 25% in the blue can and 35% in the red can.
datsunguy is offline Find More Posts by datsunguy
Reply With Quote
Old Aug 16, 2012, 02:22 AM
TEAM BOCA
jeffie8696's Avatar
United States, IA, Muscatine
Joined Oct 2009
1,599 Posts
Ditto, lots of oil and lots of nitro. Especially the oil.
jeffie8696 is offline Find More Posts by jeffie8696
Reply With Quote
Old Aug 17, 2012, 12:07 AM
Registered User
downunder's Avatar
Adelaide, South Australia
Joined Sep 2003
3,093 Posts
Quote:
Originally Posted by datsunguy View Post
Little engines give off their heat quickly and need high nitro fuel.
I'd never run a Cox engine but had always read about that so when I was given quite a few Cox engines I decided to try them with my usual zero nitro fuel. First one was a Babe Bee then a product engine (two transfer ports) then a Tee Dee 049. All of them could be started with one flick (after I found the right needle setting), no change in revs when glow power was taken off and all could be set for a nice (cool) 4 stroke. In other words, they all ran and handled just as well as much larger engines. The Tee Dee was an absolute delight . Now I'll grant that they'd all give more revs with nitro but they don't need it.
downunder is offline Find More Posts by downunder
Reply With Quote
Old Aug 17, 2012, 08:54 AM
Registered User
earlwb's Avatar
USA, TX, Grapevine
Joined Dec 2008
13,361 Posts
Normally the Cox engines will run OK using plain FAI fuel. But the power is down a little and the needle valve may be quite sensitive to adjust in some cases. But since Cox engines use multiple head gaskets, you can add or remove gaskets to improve the performance a lot.
Fewer head gaskets for no nitro glow fuel and more gaskets as the nitromethane percentage goes up. So feel free to run FAI fuel in them, they work fine off of it. I myself used to fly them quite often with 5% nitromethane glow fuel. I didn't have any problems with it. Now granted the little engines tend to run their best with 15% to 20% nitromethane glow fuel. You do need 20% oil content fuel with the little engines.
earlwb is offline Find More Posts by earlwb
RCG Plus Member
Latest blog entry: My new Gaui X5 Rc Helicopter
Reply With Quote
Old Aug 17, 2012, 10:12 AM
Registered User
Joined Oct 2004
1,101 Posts
I used to run Pee Wee 0.020's using 5%.
They will run, but the needle is pretty sensitive. For the amount of fuel these tiny engines use, I'd recommend 20-30% for easiest operation. I'm guessing that FAI fuel works best in WARM climates!
706jim is offline Find More Posts by 706jim
Reply With Quote
Old Aug 17, 2012, 07:12 PM
Registered User
Joined Jun 2011
1,546 Posts
I ran 1/2A C/L speed and we used 60% nitro and 20% castor.
datsunguy is offline Find More Posts by datsunguy
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold Jersey modeler fueling system buck181 Aircraft - Fuel - Airplanes (FS/W) 2 Jul 31, 2012 05:52 PM
For Sale Vintaeg Cox Models Cessna 182 RTF Plane Cox .049 RBYM Aircraft - Fuel - Airplanes (FS/W) 0 Jul 23, 2012 11:37 AM
Discussion Cox .049 fuel tank NOI53Y 1/2A Planes 4 Apr 11, 2012 07:57 PM
Discussion Cox TD and fuel foaming bogbeagle Engines 2 Feb 27, 2012 05:48 PM
Wanted cox fuel tanks and junk cox engines rooster66 Aircraft - Fuel - Engines and Accessories (FS/W) 3 Jun 11, 2006 01:24 AM