Larger rounds first of course. Now…was SPRINT’s fuel ever used for gyrojet?
Probably not, the GyroJet was made in the 1960's.
Your Sprint ABM was made in the Mid 1970's.
So one predate the other technologically.
GyroJet was a commercial failure and got no further development, it was started by normal folks who didn't have acccess to Defense Contractor grade materials like Martin Marietta, which is part of LockHeed Martin now.
We probably have even more powerful Solid Fuel propellants now.
But the main issue is the fundamental concept of the GyroJet.
It's main concept really isn't better than a traditional bullet & it's method of launching.
What we can do is combine Regular Bullets that are launched traditionally using Metallic Cartridges within regular FireArms, but change the inner construction of the bullet.
DIME-RAP (Delayed Ignition Miniaturized Enhanced Rocket Accelerated Propulsion) Bullets is what I would call it.
So have a hollowed out core for the bullet with a pin hole & solid fuse material that won't degrade over time. Put in the best Solid Propellant you can get to fill in the large cavity.
Add in the slowest burning possible fuse chemical in the pin hole that will ignite the Solid Propelllant.
Add in MEMS guidance fins & Simple Laser Tracker like the EXACTO bullets.
I did the rough math.
-
Green Fuse = 25 seconds per Foot
25 seconds = 12" = 304.8mm
~= 0.082020997375328083989501312335958 seconds per mm
https://www.accurateshooter.com/technical-articles/facts-about-barrel-life/
If a bullet flies at 3000 fps, it will pass through a 24″ (two-foot) barrel in 1/1500th of a second. If you have a useful barrel life of 3000 rounds, that would translate to just two seconds of actual bullet-in-barrel operating time.
Ah, but it’s not that simple. Your bullet starts at zero velocity and then accelerates as it passes through the bore, so the projectile’s average velocity is not the same as the 3000 fps muzzle velocity.
So how long does a centerfire bullet (with 3000 fps MV) typically stay in the bore?
The answer is about
.002 seconds. This number was calculated by Varmint Al, who is a really smart engineer dude who worked at the Lawrence Livermore Laboratory, a government think tank that develops neutron bombs, fusion reactors and other simple stuff.
On his Barrel Tuner page, Varmint Al figured out that the amount of time a bullet spends in a barrel during firing is under .002 seconds. Al writes: “The approximate time that it takes a 3300 fps muzzle velocity bullet to exit the barrel, assuming a constant acceleration, is 0.0011 seconds. Actual exit times would be longer since the bullet is not under constant acceleration.”
We’ll use the .002 number for our calculations here, knowing that the exact number depends on barrel length and muzzle velocity.
- Add-in MEMS (Micro Electro-Mechanical Systems) for guidance fins & tracking sensors.
Given how slow the Green Fuse burns, you could potentially have a Bullet ignite it's Rocket Core and create additional acceleration outside of the FireArm's barrel mid flight and use the MEM's to guide it to the target.
That would create more kinetic energy to impact with and extend the range to even crazier levels.
The main problem is that bullet construction would be crazy expensive, but probably useful for a sniper and a laser spotter.
whoooooooosh! KBOOM! I WIN!!
