Model Forum / Radio Controlled / Air Models / April 2008

Anybody know anything about it?
 Thanks
===========================
yes

Why bother.  You can't mix fuel as pure or cheap as the excellent brands like
Morgan, Red Max, and Wildcat.
Dr.1 Driver
"There's a Hun in the sun!"

Iflyrc68:
    Yes, I've been doing it for over 30 years from my early free flight
days on-!  you can't beat it for convenience and price.  Last time I
bought supplies was 2 years ago, but prices are usually fairly stable,
here are the prices:

Methanol -     $1.60 a gallon
Nitro -     $28 a gallon
Klotz -     $4.25 a quart if you buy a case of 10 qt.
Benol -     $6.00 a gallon- fuel grade castor oil, or "bean oil" to the
hopelessly hip

   You can make 15% nitro,15% oil fuel for around $8 a gallon, never
having to worry about sale prices, or getting to the hobby shop while
it's open.
   This also lets you make your fuel to fit the needs of each engine.
Larger glow engines need less oil. I run 15% nitro,15% oil in my .91
four stroke, and 12% oil in my 2.70 twin, and I don't think this even
pushing the limit.  An added benefit is that the less oil you use, the
better the engines idle and run- there's more burnable material in the
fuel.  It seems like each percent oil reduced is roughly (maybe a bit
less) like adding a percentage point of nitro!  Check it out for yourself.
  The best thing is to use a mix of about 2/3 to 3/4 Klotz and the rest
Castor since castor gives you better protection from overheating, lean
runs, and rust, but is not quite as low in friction as Klotz, and leaves
a gummy residue on the plane if not wiped off after every flying
session.  Castor is also a lot cheaper, as you can see.
   If you're in the SoCal area, I can tell you where to get the
components (Monarch products, Garden Grove) or you can also get good
deals on Klotz, Benol, and nitro from the Klotz booth at one of the
model shows around the country.
        Good luck -  Uncle Pauly
                       

Here in Aus, Anyone who flies more than 1-2 flights a week should mix their
own -it is just so much cheaper!

Typically, LHS prices are around $10 /litre and price varies with nitro %

I mix my own,

12% synthetic oil
5 % castor
5-8% nitro
75-78% Methanol.

with synt oil $55/3.5litres
castor $9/litre
nitro $22/litre
Methanol $20/20 litres

This volume of the components costs just over $100 and usually lasts me
about a year.  I simply mix up what I plan to use the day before.

If I was to spend the same amount at a LHS and buy pre-mixed fuels It would
only last a couple of months.

So, In Australia, it is far cheaper to mix your own.  It costs me something
around $4/litre

I also echo other sentiments about making a mix to suit your engines.

Another factor, when you mix your own, you know exactly what goes into it!,
when you buy pre-mixed fuels, you have an estimate of how it is mixed.
Also, when you mix your own, you know exactly how old it is.

Iflyrc68:
    Yes, I've been doing it for over 30 years from my early free flight
days on-!  you can't beat it for convenience and price.  Last time I
bought supplies was 2 years ago, but prices are usually fairly stable,
here are the prices:

Methanol -     $1.60 a gallon
Nitro -     $28 a gallon
Klotz -     $4.25 a quart if you buy a case of 10 qt.
Benol -     $6.00 a gallon- fuel grade castor oil, or "bean oil" to the
hopelessly hip

    You can make 15% nitro,15% oil fuel for around $8 a gallon, never
having to worry about sale prices, or getting to the hobby shop while
it's open.
    This also lets you make your fuel to fit the needs of each engine.
Larger glow engines need less oil. I run 15% nitro,15% oil in my .91
four stroke, and 12% oil in my 2.70 twin, and I don't think this even
pushing the limit.  An added benefit is that the less oil you use, the
better the engines idle and run- there's more burnable material in the
fuel.  It seems like each percent oil reduced is roughly (maybe a bit
less) like adding a percentage point of nitro!  Check it out for yourself.
   The best thing is to use oil which is a mixture of about 2/3 to 3/4
Klotz and 1/3 to 1/4 castor since castor gives you better protection
from overheating, lean runs, and rust, but is not quite as low in
friction as Klotz, and leaves a gummy residue on the plane if not wiped
off after every flying
session.  Castor is also a lot cheaper, as you can see.
    If you're in the SoCal area, I can tell you where to get the
components (Monarch products, Garden Grove) or you can also get good
deals on Klotz, Benol, and nitro from the Klotz booth at one of the
model shows around the country.
        Good luck -  Uncle Pauly
                       

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