Going Supersonic

This is pretty much the fastest model rockets can go. Minimum diameter rocket on a G77-10. Estimated altitude: 4,000 feet. Mach 1.15. You can't help but chuckle as you load the giant G motor into the tiny rocket.

Category:

Autos & Vehicles

Tags:

• supersonic
• mach
• model
• rocket
• G77
• Gmotor
• sonic
• boom

[baackboy]

This is not as fast as model rockets can go. You should get into high powered model rocketry. I have a K motor rocket that will go Mach 2.2. I also personally know people who have had rockets exceed mach 3.

[DTHRocket]

@baackboy Yeah, just got my Level 2 this summer! Now I'm working on a 38mm minimum diameter rocket. A J-motor just might take it to Mach 2.

Anyway, I think of model rockets as A-G. So it is *pretty much* as fast as model rockets can go.

[IIHeavyII]

Congratulations!!! The loud "SNAP" you and friends heard echo off of the trees IS the sonic boom. True, if there were no trees near by, you may not have heard it. There is another video with a rocket like yours with the same result and same sound. It's just like a bull whip that makes a loud "SNAP" sound when the small end exceeds the sound barrier. For a classic BA-BOOM I would suggest a larger supersonic capable device. Fighter jet?

[DTHRocket]

@IIHeavyII It might be the boom, but I doubt it. I feel like if we were to have heard it at all we would have heard it sooner. RockSim predicted mach at 350 feet or so. I know that rockets can produce audible sonic booms, because I've heard an unmistakable one in person from a minimum diameter J-motor. Though SOME people seem to believe it is completely impossible :)

[gosteezyorgohome]

you must be a noob to rocketry. If your going supersonic straight up, you dont hear a boom, because the waves travel outward. if you were 1000 feet up, you probably could hear it. nice try anyway.

ps dont you have to be 18 to be on youtube?

you have a very high voice

[DTHRocket]

@gosteezyorgohome I have been in rocketry for 6+ years, and I am majoring in aerospace engineering.

I am 19.

This video was made 3 years ago.

RockSim predicted that it would break the sound barrier at 300-400 feet, so in theory you could hear it. In fact, I heard a high-power rocket make a boom once, but it is very rare.

Unless they changed their policy recently, you can join YouTube at any age. I joined at 15 I believe.

[456ner]

@Blueberry954 oh ya the G80 will really put a rocket to the speed of sound

[olderanddecrepit]

@DTHRocket Nice job. Are the yellow ribbons hanging at your workbench for rocketry?

[ASTROgraffitiology]

Well you hit mach 1

[fatcat2939]

What a lot of rude comments.

In a super sonic (SS) object air cavitation. The perceived sound depends on

distance from SS object.

Atmospheric Humidity.

Atmospheric pressure.

SS object size.

Observers physical position in relation to the SS object.

[Blueberry954]

I spent 20 days building a supersonic rocket called the blue flame will a g 80 motor be ok the rocket is about the same size