R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road > Onroad Nitro Engine Zone

Reply
 
Thread Tools Search this Thread
Old 03-29-2010, 02:30 PM   #1
Tech Elite
 
J.Gonzalez's Avatar
 
Join Date: Nov 2002
Location: connecticut
Posts: 2,409
Trader Rating: 16 (100%+)
Default Fuel mixing...help with calculations

Anyone have links to info on blending fuel. Looking for a excel type program

Realizing how much I have forgotten since high school chemistry and feeling very old at the same time..ha!

Thanks
Jamie
J.Gonzalez is offline   Reply With Quote
Old 03-29-2010, 03:21 PM   #2
Tech Champion
 
Roelof's Avatar
 
Join Date: Aug 2007
Location: Holland
Posts: 6,275
Send a message via ICQ to Roelof
Default

Quote:
Originally Posted by senna555 View Post
Anyone have links to info on blending fuel. Looking for a excel type program

Realizing how much I have forgotten since high school chemistry and feeling very old at the same time..ha!

Thanks
Jamie
For 25%:
- 25% nitro
- 10% oil
- 65% methanol

For 16%:
- 16% nitro
- 10% oil
- 74% methanol

mixing per liter is wise to do with a lab-glass
- 100mL oil (or a mixture of several oils)
- 250mL nitro, mix it with the oil up to 350mL (25%)
- fill it up to 1 liter with methanol.
- use a stick to mix it
- drop it in a can through a coffee filter.
__________________
The quality of an answer comes with the quality of the question.
Roelof is offline   Reply With Quote
Old 03-29-2010, 07:33 PM   #3
Tech Elite
 
J.Gonzalez's Avatar
 
Join Date: Nov 2002
Location: connecticut
Posts: 2,409
Trader Rating: 16 (100%+)
Default

Getting straight nitro is getting difficult in states. They are selling it as 50/50 mix with methanol other wise you need a special license.

So I am trying to determine a basic equation for diluting the 50% solution to a 16% solution to specific quantity (in this case 900ml).

I was able to determine that I need to mix 16 parts of 50/50 solution with 34 parts of methanol...but I cant figure out the equation to mix to a specific ml amount ( be it 1 liter,2.5 liters etc)

Secondly what is your opinion of synthetic oil vs pure caster oil?
J.Gonzalez is offline   Reply With Quote
Old 03-29-2010, 11:57 PM   #4
Tech Elite
 
Riketsu's Avatar
 
Join Date: Aug 2004
Location: Puerto Rico
Posts: 2,514
Trader Rating: 32 (100%+)
Send a message via AIM to Riketsu
Default

Well, if you can only find 50% nitro / 50% methanol... according to my simple math you would need:

58% of 100% Methanol
32% of 50% Methanol / 50% Nitro Mix
10% of Castor/Synthetic Oil


Would get you 16% nitro, 74% methanol and 10% oil.

0.32 * 0.5 nitro = 16% Of nitro that you want in your mixture
0.10 = Oil you want in the fuel

1 - 0.32 - 0.10 = Rest of what you need to add in methanol.


How do you get these percentages to actual values? Multiply the numbers by how much mixture you want, example:

Say you want to mix fuel for a gallon:
0.1 * 1 gallon = 0.1 gallon of Oil = 0.38L
0.32 * 1 gallon = 0.32 gallons of 50/50 mix = 1.21L
0.58 * 1 gallon = 0.58 gallons of pure methanol = 2.20L


Someone double check this please.
__________________
eBay user id: riketsukirai
Riketsu is offline   Reply With Quote
Old 03-30-2010, 12:31 AM   #5
Tech Champion
 
Roelof's Avatar
 
Join Date: Aug 2007
Location: Holland
Posts: 6,275
Send a message via ICQ to Roelof
Default

If you do need 25% nitro then on 1 liter you do need 500mL 50/50 mix
For 16% that is 320mL 50/50 mix.

From that on you can add pure methanol to fill up the rest.
__________________
The quality of an answer comes with the quality of the question.
Roelof is offline   Reply With Quote
Old 03-30-2010, 04:38 AM   #6
Tech Elite
 
J.Gonzalez's Avatar
 
Join Date: Nov 2002
Location: connecticut
Posts: 2,409
Trader Rating: 16 (100%+)
Default

Thanks....

Any opinions on castor vs synthetic oils?

Jamie
J.Gonzalez is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 10:35 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net