Don't use powdered sugar has cornstarch and will mess up your mix, use
granular.
Ken
On Thu, Feb 9, 2023 at 7:17 AM கே.பி.எம் மாஸ் கார்த்தி <
kpmmasskarthi27@xxxxxxxxx> wrote:
Sure.
வியா, 9 பிப்., 2023, 8:40 PMக்கு, Rocket Pavitra <
pavitrapatel.astro@xxxxxxxxx> எழுதியது:
That's a lot of potassium nitrate, use either a 35/65 Ratio or a 40/60
Ratio (35/65 preferred), and send the link to a video filmed as you burn
it. I'll be able to better diagnose the problem if I can see it burning/not
burning.
On Thu, Feb 9, 2023 at 8:37 PM கே.பி.எம் மாஸ் கார்த்தி <
kpmmasskarthi27@xxxxxxxxx> wrote:
I am using powdered sugar at ratio of 70 to 30 of kno3 and sugar
respectively
வியா, 9 பிப்., 2023, 8:27 PMக்கு, Rocket Pavitra <
pavitrapatel.astro@xxxxxxxxx> எழுதியது:
What exact mixture and composition are you using? How much percentage
of each chemical? And what are you using for fuel? Table sugar, Dextrose or
Sorbitol?
On Thu, 9 Feb, 2023, 8:13 pm கே.பி.எம் மாஸ் கார்த்தி, <
kpmmasskarthi27@xxxxxxxxx> wrote:
Guys , I am still having problem with potassium nitrate it is not
firing .It has light reaction with extensive heat like a 10 match sticks.
வியா, 9 பிப்., 2023, 5:51 PMக்கு, Rocket Pavitra <
pavitrapatel.astro@xxxxxxxxx> எழுதியது:
Hi, as I mentioned in my initial reply
'You might want to rid the fuel and oxidizer of moisture that it has
absorbed overtime.
To do this you can either put your fuel and oxidizer in an oven at
50-70 degree Celsius for about an hour.
Or if you don't have access to an oven like me, what I do is I mix
the propellants in the correct mixture ratio and melt them on a pan. You
want to keep the temperature of the mixture low to avoid caramelization.
Now this depends on the fuel using.
Sucrose (Table sugar) is really hard to make a propellant out of by
this method because of its low caramelization temperature. But make sure
your pan temperature is below 150 celcius. If your propellant slurry
starts
turning brown it means the temperature is too high. '
And the appearance of the potassium nitrate will not change but you
can figure out if the moisture has been removed or not by weighing the
sample of fuel before and after heating. There should be a 10% reduction
in
mass after dehydration.
On Thu, Feb 9, 2023 at 5:24 PM கே.பி.எம் மாஸ் கார்த்தி <
kpmmasskarthi27@xxxxxxxxx> wrote:
Thanks , any idea to eliminate water from potassium nitrate after
elimination of water how should it look like ?
வியா, 9 பிப்., 2023, 2:06 PMக்கு, Rocket Pavitra <
pavitrapatel.astro@xxxxxxxxx> எழுதியது:
Getting good potassium nitrate is hard. I'm glad I could help. ♥️
On Thu, 9 Feb, 2023, 12:03 pm கே.பி.எம் மாஸ் கார்த்தி, <
kpmmasskarthi27@xxxxxxxxx> wrote:
Thanks, I am just confused because all of the potassium nitrates I
bought were full of moisture content. That's why I got confused .
On Thu, Feb 9, 2023 at 11:56 AM Rocket Pavitra <
pavitrapatel.astro@xxxxxxxxx> wrote:
Potassium nitrate absorbs water extremely readily. So you'll
almost always have to dehydrate the KNO3 before using it unless it
was
stored in a dry environment in an airtight container and its fresh.
But
thankfully removing water from the nitrate is relatively easy.
On Thu, Feb 9, 2023 at 11:47 AM கே.பி.எம் மாஸ் கார்த்தி <
kpmmasskarthi27@xxxxxxxxx> wrote:
is it normal for the potassium nitrate to absorb the water or
always in a partial liquid state?
On Wed, Feb 8, 2023 at 10:19 PM Rocket Pavitra <
pavitrapatel.astro@xxxxxxxxx> wrote:
Caramalizing is basically the sugar breaking down to form
compounds that do not have as much energy and do not burn well.
So when your fuel caramalizes, the fuel's chemical composition
is changing to become useless.
On Wed, 8 Feb, 2023, 2:27 pm கே.பி.எம் மாஸ் கார்த்தி, <
kpmmasskarthi27@xxxxxxxxx> wrote:
Thanks for your reply . Can you explain what is the problem in
cramelizing sugar ?
புத, 8 பிப்., 2023, 2:21 PMக்கு, Rocket Pavitra <
pavitrapatel.astro@xxxxxxxxx> எழுதியது:
Hey! I'm Pavitra
First of all you should make sure that your fuel and oxidizer
are finely ground. If the grain size of the fuel and oxidizer
particles is
too big you will experience problems with maintaining the burn
rate of your
fuel, this is especially true if you are simply mixing the 2
powders
without melting/casting.
Second, make sure that you are adding the correct proportion
of propellants. Ideally you want to add 35-40 % of fuel
(Assuming you're
using some sugar like Sucrose - table sugar - , Dextrose,
sorbitol etc) and
60-65 % of potassium nitrate.
After making sure that you're following the above 2 points
correctly if your fuel mixture still doesn't burn
satisfactorily. You might
want to rid the fuel and oxidizer of moisture that it has
absorbed
overtime.
To do this you can either put your fuel and oxidizer in an
oven at 50-70 degree Celsius for about an hour.
Or if you don't have access to an oven like me, what I do is
I mix the propellants in the correct mixture ratio and melt them
on a pan.
You want to keep the temperature of the mixture low to avoid
caramelization. Now this depends on the fuel using.
Sucrose (Table sugar) is really hard to make a propellant out
of by this method because of its low caramelization temperature.
But make
sure your pan temperature is below 150 celcius. If your
propellant slurry
starts turning brown it means the temperature is too high.
Dextrose as a fuel is much easier to work with if you prepare
your propellant by casting. It has a higher caramelization
temperature and
even slightly higher energy.
You can get Dextrose online for pretty cheap if you look hard
enough.
The melting and casting method eliminates some or all of the
moisture present in the propellants.
Hope this is helpful. 😊👍
On Wed, 8 Feb, 2023, 2:02 pm கே.பி.எம் மாஸ் கார்த்தி, <
kpmmasskarthi27@xxxxxxxxx> wrote:
Hi guys ,I am currently working on model rocket using
potassium nitrate and sugar as fuel. But i am having problem
with potassium
nitrate , it have more moisture content . And also mixture
didn't fire or
reaction is not happening. Any reasons and solutions ?