Given this thing is pretty small and made of very secured metal parts I’m gonna toss in my guess that there’s some insane chamber pressure/exhaust velocity going on for a motor this size.
Nice clean burn and very stable combustion. I see purple in your test burn so I assume you are using potassium nitrate though I can tell by the exahust plume that this is not sugar nitrate. Is this a polyurethane/kno3 propellant?
nope, that's APCP. ammonium perchlorate, aluminum powder, probably an HTPB or PBAN with a curative as the binder. If that was potassium nitrate you would not see any diamonds, or even much flame, burning under that kind of pressure. the ammonium in the oxidizer burns as a fuel as well, so it doesn't put off the smoke that potassium nitrate compounds do. burned at a stoichiometric ratio, AP pouts off almost zero smoke at atmospheric pressure, but does produce aluminum oxide "smoke" burning confined behind a nozzle.
Those shock diamonds are beautiful. You might want to change the size of your nozzle to maximize your efficiency. I saw a large portion of the plume actually burned *outside* of the motor.
Damn, you got a really efficient fuel to have a transparent plume. The space shuttle srb plumes were not transparent due to unburned byproducts. Yours is burning a lot of the byproduct.
Wait, you're the crazy guy who beat the Ferrari on a peroxide powered bicycle, aren't you? I've been experimenting with a mixture of polyethylene glycols and calcium hypochlorite, which are hypergolic. I even have an engine design somewhat worked out with a U shaped metal combustion chamber and nozzle at one end that mounts to my bike. Pour the propellants in, let them settle in the bottom of the U, and when combustion happens a about minute later they actually self seat against the rear bulkhead under the force of acceleration.
by having stable combustion and supersonic exhaust gas, also it probably uses ammonium perchlorate, which smokes a lot less than potassium based oxidizers.
hi, i very like your project, and i think i want make diy for my learn and knowledge,but i don't know how to do. 🥺.Teach how to make engine rocket like real rocket.Can u teach me?
Honestly, if I had money to pour into a more elaborate rocket bike setup, I would be using a Paraffin based hybrid motor and Nitrous Oxide, for the safety factor. For liquids, I would go LOX/alcohol or Nitric Acid/Furfuryl Alcohol for simplicity.
Don't usually see solid motors produce shock diamonds
I kind of thought the same thing.Would almost think it was a binary system like nitrous and fuel
TheRedstoneHive ya
A big enough one does. It depends on the chamber pressure and the nozzle geometry.
Given this thing is pretty small and made of very secured metal parts I’m gonna toss in my guess that there’s some insane chamber pressure/exhaust velocity going on for a motor this size.
I think anything f-motor and above produces mach diamonds.
Those shock diamonds are so damn satisfying to watch ^^
looks cool but there sings of bad exhaust design if its only supposed to work on sea level
wow, great job with the solid rocket engine, Ive never seen shock diamonds appear on a small model like that before
Everyone 2 weeks ago: ooh, what are those cool shapes in the exhaust?!?
Everyone now: shock diamonds, cool stuff.
XD
Nice clean burn and very stable combustion. I see purple in your test burn so I assume you are using potassium nitrate though I can tell by the exahust plume that this is not sugar nitrate. Is this a polyurethane/kno3 propellant?
nope, that's APCP. ammonium perchlorate, aluminum powder, probably an HTPB or PBAN with a curative as the binder. If that was potassium nitrate you would not see any diamonds, or even much flame, burning under that kind of pressure. the ammonium in the oxidizer burns as a fuel as well, so it doesn't put off the smoke that potassium nitrate compounds do. burned at a stoichiometric ratio, AP pouts off almost zero smoke at atmospheric pressure, but does produce aluminum oxide "smoke" burning confined behind a nozzle.
God damn, those shock diamonds are magnificent.
Those shock diamonds are beautiful. You might want to change the size of your nozzle to maximize your efficiency. I saw a large portion of the plume actually burned *outside* of the motor.
You had it harmonized. Perfect
I’m a simple man. When I see shock diamonds I click
The shock diamonds were so cool.
impressive little test.. (I thought the bucket burn at the end was funny) I will have to check out more!
I wanna see this type of engine on a model rocket
SAMGalaxy32 and I want to see that kind of performance in my Little Boy. As for now he doesn’t deserve this magnificent name.
Damn exotic shock diamonds. I love it.
Good work! Looks amazing
Damn, you got a really efficient fuel to have a transparent plume. The space shuttle srb plumes were not transparent due to unburned byproducts. Yours is burning a lot of the byproduct.
I think the reason the srb plume is very bright and makes a lot of smoke because there is aluminum, where as this propellant appears to have no metals
Pretty impressive!
Man, never seen so many rocket scientists in one comment section!...
Nice clean burn!
Next, first test of small scale fusion reactor.
Wait, you're the crazy guy who beat the Ferrari on a peroxide powered bicycle, aren't you? I've been experimenting with a mixture of polyethylene glycols and calcium hypochlorite, which are hypergolic. I even have an engine design somewhat worked out with a U shaped metal combustion chamber and nozzle at one end that mounts to my bike. Pour the propellants in, let them settle in the bottom of the U, and when combustion happens a about minute later they actually self seat against the rear bulkhead under the force of acceleration.
Good job. Especially the diamonds!
Do you the dimensions now?
How the heck did you get shock Diamonds???
by having stable combustion and supersonic exhaust gas, also it probably uses ammonium perchlorate, which smokes a lot less than potassium based oxidizers.
@@pyrusrex2882 thanks:)
Hey man whats up Nice to see you again from Major prep
from an old Zinc head. Very nice mach diamonds.Did not expect that
Awesome video! What kind of camera were you using to get 1000fps video?
Very nice!
As I browse the comment below, you used AP, is it ok if I use AN?
hi, i very like your project, and i think i want make diy for my learn and knowledge,but i don't know how to do. 🥺.Teach how to make engine rocket like real rocket.Can u teach me?
What type of chemicals used in this SRM ?
Hey man, I have been wondering about how did you calculate that thrust power diagram shown at 0:44? I would be very happy if you answer me 😊
He has it resting on a pressure sensor/scale of some sort attached to a computer running software to record the data.
@@patrick1532 oh thanks i didnt think abaut that
which software did you use to calculate the thrust?
1:30 my asshole after eating an entire bag of takis.
Aerospike nozzle?
Honestly, if I had money to pour into a more elaborate rocket bike setup, I would be using a Paraffin based hybrid motor and Nitrous Oxide, for the safety factor. For liquids, I would go LOX/alcohol or Nitric Acid/Furfuryl Alcohol for simplicity.
Can you give mi the plan
Dude it's not rocket science! Oh wait...