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General control line discussion => Open Forum => Topic started by: Motorman on September 23, 2019, 09:27:42 PM

Title: Changing Nitro
Post by: Motorman on September 23, 2019, 09:27:42 PM

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Title: Re: Changing Nitro
Post by: Howard Rush on September 24, 2019, 12:03:01 AM

First case: there's the same amount of nitro before and after.  100*.2 = (100 + x)*.15
20 = 15 + .15*x
5 = .15*x
5/.15 = x
33.3 = x

Second case: Add the quantities of nitro.  .1*100 + .2*x = .15*(100 + x)
10 + .2*x = 15 + .15*x
.2*x = 5 + .15*x
.05*x = 5
x = 5/.05
x =100

Title: Re: Changing Nitro
Post by: Dave Harmon on September 24, 2019, 12:12:53 PM

Quote from: Motorman on September 24, 2019, 08:40:25 AM

First case add 33.3 cc

second case mix 1/2 and 1/2

Right?

Yes

Title: Re: Changing Nitro
Post by: 944_Jim on September 24, 2019, 04:15:55 PM

MM,
Here is your very own copy:
http://web2.murraystate.edu/andy.batts/ps/fuel.htm

Grab the Excel spreadsheet. It is built for quarts if I remember right. I saved it and edited it for 8 ounce batches.

Enjoy!

Title: Re: Changing Nitro
Post by: Richard Imhoff on September 24, 2019, 07:55:28 PM

Try this site it's where I go to figure when I want to add oil or nitro or mix complete batches.

http://nitrorc.com/fuelws/

Title: Re: Changing Nitro
Post by: 944_Jim on September 25, 2019, 03:04:24 PM

MM,
Did you get a chance to try the spreadsheet? It is straight up for what you intend to do...mix two fuels and see results.

Title: Re: Changing Nitro
Post by: Richard Imhoff on September 25, 2019, 06:30:29 PM

Go here it's the best I have ever found 

http://nitrorc.com/fuelws/

Title: Re: Changing Nitro
Post by: 944_Jim on September 25, 2019, 06:55:29 PM

MM,
Shoot a pm with email/phone number. I'll talk you through it. Since you do the smalls (I've seen you on CEF), I'll pass the altered smaller (8 oz) calculator to you. Five minutes will be all it takes.

I'm really busy at work, so it may be this weekend. Saturday mid-day ok? I'm in Central time.

Title: Re: Changing Nitro
Post by: RogerGreene on September 25, 2019, 09:06:40 PM

Attached is an spreadsheet I use for changing store bought fuel with high nitro% and low oil% content. So by adding castor oil you can change the nitro content.

Enjoy,

Roger Greene