tony0707

HI
GETTING 3 gallons of 20 % nitro cheephow much FAI fuel ( methanol and 80/20 oil -80 syn and 20 castor ) do i need to add to the gallon to reduce the % to 15 % from 20 % NITRO thank you

moe7404

i have been mixing my own nitro for some months. but its not as easy 8 oz of one and 8 oz of the other does NOT =50%. thats because of the size of the molecules. a hydrometer is the only way to know what % you have. cause the fuel you are starting out with is mostly methanol, get a plastic jar from the store, dole has 24 oz jars with oranges ect. the top bulge is 18 oz. then find a scale weight it, then calculate 15% add that much methanol. this will NOT be real accurate, but should be close. please dont jump on me about it not being accurate, i know is not. just be careful. NOTE: a methanol fire can not be seen in day light, but water will put the fire out.

KidEpoxy

The simple laymans way:

1qt '0nitro-glow' + 3qt '20nitro-glow' = 1gal 15 nitro glow

Assuming both fuels start with oil content you wouldnt mind flying,
then the mix will result with oil somewhere between the two starting numbers, which would be fine.
If either fuel has an oil content you would not be happy flying,
then post all the oil numbers you have and we can evaluate where you stand

tony0707

HI KIDEPOXY
THANK YOUEASY explination to understand 1 to 3 ratio

what happens if i increase my oil by 2% in my gallons of 15% ( aprox 3 onces ) do i just reduce my methanol by 3 onces would that be correct ?

tony0707

hi
any idea what the percentage of oils is in O'donnalls 20% racing oilthe total oil is 18 %- -all syn or some castor ?if all syn i will need to add some cator oil for my use ( that is what my post above this one is about )help is greatly appreciated here thank you TONY

KidEpoxy

1qt (0Nitro-20oil) + 3qt (20nitro-18oil) = 1gal 15nitro 18.5oil

if you just add 2oz oil to the gallon when done, you get
'A Lil Over' 1gal 14.77nitro and 20.06oil

Now, considering what you will use to measure the mixing,
we can forget any of them decimal deviations and say its about 15nitro and about 20oil if you add about 2oz oil at the end

Scota4570

Mdilution*Vdilution = Mstock*Vstock

For our purposes:

%final * Volume Final = %original * Volume original

%final = %original * Volume original / Volume Final

OK so:

1 gallon of 15%nito diluted to 3 gallons is what final percent nitro?


15 * 1 / 3 = 5%