Hello again, I am back

fit90 Mon Mar 04, 2024 9:32 am

Hello everyone,

It has been a long while. But, it is always good to come back.

Is anyine else brewing their own diesel fuel? If so, what is your recipe. I am new to this and just using a recipe I found in the internet: 102 part formula 40 parts keresene, 35 parts ether, 25 parts castor and 2 parts cetane booster.

fit90 Mon Mar 04, 2024 9:35 am

I think I should switch to 35 parts kerosene and 40 parts ether and possibly omit the cetane booster

rsv1cox Mon Mar 04, 2024 10:38 am

Welcome back. And diesel, not fully explored territory here. Looking forward to your discussion.

gkamysz Mon Mar 04, 2024 11:42 am

The first recipe is fine. Engines smaller than .049 might benefit from more ether. The cetane booster is helpful. Diesel Kleen isn't ideal as it's diluted and I think it has other additives. Amsoil ACB is neat cetane booster.

Which engines will you be running?

robot797 Mon Mar 04, 2024 12:30 pm

welcome back
I brew my own diesel
the current mix I use is
55% petrolium
10% castor oil
8% 2 stroke oil
27% ether

from what I have found
ether should be between 20 and 30%
oil should be between 15 and 20%
and you top it off with petrolium (or pump diesel-lamp oil or any petrolium product)

I know people who went as low as 8% oil
but I dont trust that

as for the ether
the more you use the easier it starts but the hotter it runs
if you have a bigger rc diesel you can even drop the ether if the engine is warm

the best starter mix is 1-1-1
all parts 33.333%

but I know from experience it makes a MESS

davidll1984 Mon Mar 04, 2024 3:21 pm

I wonder if using diesel directly from the pump would be more economical than just kerosene mix the two Have a percentage of each. ??what quantity would be ideal I also have some diesel engine but I don't have much experience in this area I did some testing although it is successful I believe that there is still room for improvement in my recipe I don't like the smell but I would like to use diesel sometimes when there is a lack of nitro fuel having the possibility of using diesel I would say that I would be happy to be able to convert an engine and still fly

robot797 Mon Mar 04, 2024 3:37 pm

davidll1984 wrote:I wonder if using diesel directly from the pump would be more economical than just kerosene mix the two Have a percentage of each. ??what quantity would be ideal I also have some diesel engine but I don't have much experience in this area I did some testing although it is successful I believe that there is still room for improvement in my recipe I don't like the smell but I would like to use diesel sometimes when there is a lack of nitro fuel having the possibility of using diesel I would say that I would be happy to be able to convert an engine and still fly

for me myself it doesnt matter all petroliums are the same price

but I do know the premium diesel from the pump works the best
there are improvers in it

ps I do love the diesel smell XD

gkamysz Mon Mar 04, 2024 4:06 pm

Premium diesel? Do you have more than one grade of diesel there?

Cetane number for pump diesel and kerosene naturally varies. Kerosene cetane number is typically higher than diesel. But pump diesel is required to meet certain specs so cetane boosters are sometimes added.

Pump diesel can work as can many other hydrocarbon fuels. Kerosene seems best for small engines.

robot797 Mon Mar 04, 2024 4:08 pm

gkamysz wrote:Premium diesel? Do you have more than one grade of diesel there?

Cetane number for pump diesel and kerosene naturally varies. Kerosene cetane number is typically higher than diesel. But pump diesel is required to meet certain specs so cetane boosters are sometimes added.

Pump diesel can work as can many other hydrocarbon fuels. Kerosene seems best for small engines.

jep
the shell has diesel and premium diesel here
the premium has stuff that makes it burn cleaner

before I tried petrolium I used liquid parafin (lamp oil) and I must say there is no diferense

gkamysz Mon Mar 04, 2024 9:59 pm

robot797 wrote:
before I tried petrolium I used liquid parafin (lamp oil) and I must say there is no diferense

Lamp oil can be similar to kerosene or quite a bit heavier, you have to check the spec sheet.

Oldenginerod Tue Mar 05, 2024 1:56 am

I haven't flown with diesel for probably 45 years. Back then I only used a local model diesel fuel from Aeroflyte. There was nothing to indicate their formula. In my "fiddling" overt he past few years I have just used the 1:1:1 ratio and have used Jet A-1. I know it makes a mess, but I wouldn't personally recommend using any lower than 25% castor in a diesel due to the extra forces on the crank & crank-pin.

We do have "Truck diesel" as well as "Premium diesel". The premium is designed more for smaller common rail diesels, while the "Truck diesel" is designed for, well, trucks. I never would have considered it in model fuel. It's always just been kerosene. I did have to do some calculations when I used ignition improver. The Redline stuff is wickedly expensive, so I used another brand (Chemtech) that was diluted, so I had to factor in the "naphtha" as part of the kerosene component. Seemed to work ok.

fit90 Tue Mar 05, 2024 7:07 am

gkamysz wrote:The first recipe is fine. Engines smaller than .049 might benefit from more ether. The cetane booster is helpful. Diesel Kleen isn't ideal as it's diluted and I think it has other additives. Amsoil ACB is neat cetane booster.

Which engines will you be running?

I have several engines I will be playing with. I will probably start with some small PAW's and dieselized Coxes. I have a partially built plane that I think would be great with a PAW .055.

crankbndr Tue Mar 05, 2024 3:32 pm

Welcome back!! As a fellow Floridian I was wondering how you did through Ian 22 ? I think you got some of Irma in 17 also?
What's with the I storms!!

fit90 Thu Mar 07, 2024 10:36 am

gkamysz wrote:The first recipe is fine. Engines smaller than .049 might benefit from more ether. The cetane booster is helpful. Diesel Kleen isn't ideal as it's diluted and I think it has other additives. Amsoil ACB is neat cetane booster.

Which engines will you be running?

Thank you. The Amsoil is on the way.

fit90 Thu Mar 07, 2024 10:42 am

crankbndr wrote:Welcome back!! As a fellow Floridian I was wondering how you did through Ian 22 ? I think you got some of Irma in 17 also?
What's with the I storms!!

Irma was a little rough for me. It went right over our house. It took a few shingles off the roof and knocked down over a dozen trees on my property. I think Ian was a much worse storm because of the storm surge. Fortunately for me, I live far enough south of the storm track that it was just a nasty wind event for us. I hope you were able to escape all damage from the storms we have experienced the last several years.

fit90 Thu Mar 07, 2024 4:55 pm

The home brew works. I did switch the cetane boost to sta bil. The engine is a cox .049 medallion with an RJL conversion head swinging an MAS 7x4 prop.

robot797 Thu Mar 07, 2024 4:57 pm

it has a nice sound

roddie Thu Mar 07, 2024 5:29 pm

Hi Bob, Welcome back! What size Medallion is that in the vid... and what size/type is the propeller?

Oldenginerod Thu Mar 07, 2024 11:56 pm

fit90 wrote:The engine is a cox .049 medallion with an RJL conversion head swinging an MAS 7x4 prop.

roddie Fri Mar 08, 2024 7:45 pm

Oldenginerod wrote:
fit90 wrote:The engine is a cox .049 medallion with an RJL conversion head swinging an MAS 7x4 prop.

oh... ugh.... the sloth got me.. (I should explain..) There was this older kid on our school-bus route.. and he used to tell me that "The sloth is gonna' get ya'.."... implying that... well..

fit90 Sat Mar 09, 2024 9:02 pm

roddie wrote:
Oldenginerod wrote:
fit90 wrote:The engine is a cox .049 medallion with an RJL conversion head swinging an MAS 7x4 prop.

oh... ugh.... the sloth got me.. (I should explain..) There was this older kid on our school-bus route.. and he used to tell me that "The sloth is gonna' get ya'.."... implying that... well..

I think the sloth gets us all from time to time.

fit90 Sun Mar 10, 2024 6:42 pm

I went to start the medallion and broke the crank, hand propping, with no fuel. I obviously miss something. Oh well. So, I decided to dig out an old PAW .06 and give it a go. It required a good, thorough cleaning. But, it rewarded me with some really good runs. It is spinning an MAS 7x4 scimitar on my home made fuel.

Sorry about the poor quality of the video.

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