Notices
RC Fuels Nitromethane, Castor Oil, Synthetic, heli fuel, 4 stroke, etc...Fuel Q&A is here!

castor

Old 03-05-2004, 05:17 PM
  #1  
Senior Member
Thread Starter
My Feedback: (28)
 
Join Date: Jun 2003
Location: Gates, NC
Posts: 125
Likes: 0
Received 0 Likes on 0 Posts
Default castor

Hi; I am running a 20% castor syn. mix fuel and I want to boost the castor oil content to make the oil content 23%. Does anyone know how to figure how much castor to add to one gallon of fuel to bring up the oil content to 23% ? Thanks
Old 03-05-2004, 05:25 PM
  #2  
Senior Member
 
splatt's Avatar
 
Join Date: Jan 2002
Location: splattsville, MN,
Posts: 651
Likes: 0
Received 0 Likes on 0 Posts
Default RE: castor

128 oz. in a gallon.... 12.8 oz. would 10 % 1.28 would be 1 %

1.28 x 3 = 3.84

My brain would say add alittle less than 4 oz. and you'll be there. But than again I don't rely on my math to save my life
Old 03-05-2004, 05:26 PM
  #3  
Senior Member
 
splatt's Avatar
 
Join Date: Jan 2002
Location: splattsville, MN,
Posts: 651
Likes: 0
Received 0 Likes on 0 Posts
Default RE: castor

I'm doing the same thing. I got a MDS .78 for 60 bucks from the LHS and the "theys" of the world say to have a higher caster content for these russian engines. So I got some caster to add to my mix too, makes 'um run alittle cooler since castor can carry the heat out the exhaust pipe. Just alittle messy
Old 03-05-2004, 05:44 PM
  #4  
Senior Member
Thread Starter
My Feedback: (28)
 
Join Date: Jun 2003
Location: Gates, NC
Posts: 125
Likes: 0
Received 0 Likes on 0 Posts
Default RE: castor

Thanks, I will add around 3 1/2 oz. per gallon
Old 03-12-2004, 11:08 AM
  #5  
Junior Member
 
Join Date: Mar 2004
Location: , TX
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Default RE: castor

by adding oil to the gallon u no longer have a gallon of fuel. a gallon is 128 oz and if u add 3 or 4 more ounces u have 131-132 oz which makes all the percentages of the fuel wrong on the bottle. u may want to consider this. between 20-23% oil it won't make a difference if it is a good quality oil. i market my own fuel and for planes i run 12%, heli's 18% and cars 8% and most engines i have seen do more than 6 gallons of fuel. my own personal engine runs on 6% oil and it has 9 gallons thru it so far and still going.
Old 03-12-2004, 11:11 AM
  #6  
Moderator
My Feedback: (58)
 
rajul's Avatar
 
Join Date: Jun 2002
Location: Missouri City, TX
Posts: 8,250
Likes: 0
Received 3 Likes on 3 Posts
Default RE: castor

ORIGINAL: Veco

Thanks, I will add around 3 1/2 oz. per gallon
Try using Klotz Benol castor oil, if you can get your hands on it. It's the best there is
Old 03-16-2004, 02:58 PM
  #7  
Senior Member
 
Join Date: Feb 2002
Location: Decatur, AL
Posts: 220
Likes: 0
Received 0 Likes on 0 Posts
Default RE: castor

Xtreme is right about the calculation. To increase the oil content from 20% to 23%, you would need to add 5 oz of oil, not 3.5 oz. The formula for calculating it yourself is as follows: Oz of oil to add to one gallon of fuel = (D%-S%) x 128/(100-D%), where S% is the starting % oil, D% is the desired %. In your example, 3x128/77=4.99. I agree Rajul about Benol too.
Old 03-19-2004, 10:18 PM
  #8  
Senior Member
 
Join Date: Jul 2003
Location: no city, AL
Posts: 2,613
Likes: 0
Received 0 Likes on 0 Posts
Default RE: castor

Or if you don't want to do the math go to www.nitrorc.com. Click on Custom Blending Workshop. At the bottom of the page is a realy neat program that allows you to come up with any % of oil, nitro etc. by simply plugging in a few numbers.

jess
Old 03-19-2004, 10:46 PM
  #9  
Moderator
My Feedback: (58)
 
rajul's Avatar
 
Join Date: Jun 2002
Location: Missouri City, TX
Posts: 8,250
Likes: 0
Received 3 Likes on 3 Posts
Default RE: castor

Nothing like deriving equations from first principles
Old 03-20-2004, 08:44 AM
  #10  
Senior Member
Thread Starter
My Feedback: (28)
 
Join Date: Jun 2003
Location: Gates, NC
Posts: 125
Likes: 0
Received 0 Likes on 0 Posts
Default RE: castor

That is a nice little program on the nitrorc.com website. It makes adding oil to your fuel a snap, thanks
Old 03-20-2004, 11:28 PM
  #11  
Senior Member
 
Join Date: Jul 2003
Location: no city, AL
Posts: 2,613
Likes: 0
Received 0 Likes on 0 Posts
Default RE: castor

ORIGINAL: Veco

That is a nice little program on the nitrorc.com website. It makes adding oil to your fuel a snap, thanks
I got my fill of equations in college, back in the day of the slide rule. I'll take the easy way out every trip of the train.

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 Off
Pingbacks are Off
Refbacks are On


Thread Tools
Search this Thread

Contact Us - Manage Preferences Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.