Iris Sounding Rocket 2 stage flight LDRS 31 

+macheifach seriously, I love rocket launches and this one was amazing. Never realized how fast rockets really go.

Yes, great vid! Perfect flight!

2:00 I smelled the smoke 😂😂😂😂

2:00 I smelled the smoke 😂😂😂😂

with accuracy or without accuracy just asking?

High thrust rockets burn for a very short time vs low thrust which burn much longer.

High power rocket guy here, skyking is right... I'll add that sometimes it's just personal preference if you like punchy/short over lazy/long burn profiles for a given volume of motor casing to work with. Another factor of preference might be needing to achieve high enough speed for the fins to take effect before the launch rail is cleared.. you'll see the need for more punchy motors when the thrust/weight ratio will be lower due to the rocket being heavy for the given motor casing size. Propellent formula is partly to blame for propellent burn times (ratio of oxidizers) and also the inside geometry of the propellent (hollow core (fast) vs. crescent core (slow) vs. endburner(slow)). So... gotta be mindful of the slow burners because the rocket might not go fast enough for fins to work, or it might arc over too much.... many factors. Hope that helps!

kidwithaquadcopter - no, its missing guidance systems

Nick Smith Errr unguided missile, still a missile

There is no unguided missile. A rocket is unguided. And a missile is guided. This thing does not have any guidance

Can we just call it a missile? Calling it a rocket feels like it downplays how fucking fast it is

@@Kay_213_ Rockets are fast as fuck. Faster than any missile. They just accelerate slowly, at first.

Kirz94 maybe 50,000 ft

Sugar+Kno3 and then cocked it until melts.

ns=Newton Second, the measure of a motor's impulse. The model rocket impulse chart designates letters A, B, C, etc where each successive letter denotes double the impulse range of the prior, thus an M motor (5,200-10,400 ns) is 1,000 times larger than a C motor (5-10ns). So a 7600 is in the middle of the M range and produces about 1,700 pounds of thrust. My motor was designed for a 2.5 second burn time, so 7600/2.5=3000, or an average thrust of about 650 pounds. It ain't rocket science, oh wait - it is :)

Thanks, vahpr.