Quantcast

Loudest motors?

The Rocketry Forum

Help Support The Rocketry Forum:

Crash-n-Burn

Well-Known Member
Joined
Aug 14, 2014
Messages
379
Reaction score
1
It seems to me, based on personal experience, that red motor formulations (red lines, red lightning) are consistently the loudest in their respective and equivalent case set. Smokeys and Sparkies sounds disproportionately quiet.

Agree? Disagree? What are your favorite motors from a noise/sound perspective? Please add Loki formulations (and any other manufacturer) in, I'm not as familiar with them but didn't intend to limit this to CTI/AT.
 

mccordmw

Well-Known Member
Joined
Jan 18, 2016
Messages
1,020
Reaction score
47
Location
St. Louis, MO
I like the loud crackle of any sparky motor. Those seem louder to me than a smoky sam. Maybe it's a pitch thing. Also, I thought CTI White Thunders were supposed to be louder than smoky sams?
 

FredA

Well-Known Member
Joined
Jan 19, 2009
Messages
2,132
Reaction score
318
Loudest - research motors running at high pressures.
Push up the pressure beyond the relatively tame pressure that commercial loads run and you'll crank up the noise.
 

mccordmw

Well-Known Member
Joined
Jan 18, 2016
Messages
1,020
Reaction score
47
Location
St. Louis, MO
Coolest = CTI O25,000

That growl while it comes up to pressure gives me goosebumps.
 

ksaves2

Lifetime Supporter
TRF Lifetime Supporter
Joined
Nov 25, 2009
Messages
5,981
Reaction score
294
Loudest motors? The 12 or so N5800's going off in the Wildman drag race from 2011 at MidWest Power 9. The videos just do not do justice to the sound pressure level. [video=youtube;9Ojliv026YA]https://www.youtube.com/watch?v=9Ojliv026YA[/video] Kurt
 

Cabernut

Well-Known Member
Joined
Oct 15, 2015
Messages
1,384
Reaction score
2
To me, Sparky motors seem louder. Otherwise it seems proportional to the newtons of thrust at liftoff.
 

mccordmw

Well-Known Member
Joined
Jan 18, 2016
Messages
1,020
Reaction score
47
Location
St. Louis, MO
I bet this one rocket was hella loud!

[video=youtube;YmlgN4DRk2Y]https://www.youtube.com/watch?v=YmlgN4DRk2Y[/video]
 

jimzcatz

Boss, Carolina Rocket Mafia
Joined
Jan 22, 2009
Messages
4,004
Reaction score
213
Location
Hurdle Mills NC
Without a doubt the classic AMW Skidmark is the loudest. Especially the M2200.
 

Banzai88

Lvl 1,Wallet....Destroyed
TRF Supporter
Joined
Jul 15, 2015
Messages
2,375
Reaction score
559
...but didn't intend to limit this to CTI/AT.
Shoulda probably been a discussion that grouped motors by size or something, but in keeping with the trend that "Mine is bigger than yours", I would choose the Saturn 5. Close second is probably the Space Shuttle or some Russian candle. :)
 
Last edited:

ksaves2

Lifetime Supporter
TRF Lifetime Supporter
Joined
Nov 25, 2009
Messages
5,981
Reaction score
294
Without a doubt the classic AMW Skidmark is the loudest. Especially the M2200.
I had heard it discussed that motor will be long remembered and unlikely replicated in the future. Something about the batch of Ti used that can't be duplicated? After being around a few years I have the impression that APCP motors can
be like a fine wine. A batch can turn out to be really impressive and due to perhaps subsequent subtle changes in reagents (unbeknownst to the motor maker) maybe not so cool in the future. Kurt
 

Donaldsrockets

Well-Known Member
Joined
Jan 18, 2009
Messages
3,562
Reaction score
1
Location
Fort Myers, FL
AT White Lightning motors make a pretty good racket.

The E18W and G64W make a very nice, very loud roar for their size.:wink:
 

jderimig

Sponsor
TRF Sponsor
Joined
Jan 23, 2009
Messages
3,204
Reaction score
617
A Contrail 54mm hybrid Sparky motor with a N2O fill of 800-850psi is a very loud motor with a unique high pitch scream component in the spectrum.
 

cerving

Owner, Eggtimer Rocketry
TRF Sponsor
TRF Supporter
Joined
Feb 3, 2012
Messages
3,954
Reaction score
1,197
The N1 cato was probably the loudest of all...
 

cavecentral

Well-Known Member
Joined
Jul 1, 2011
Messages
3,129
Reaction score
25
Loudest are the research that hit a pressure spike spitting out part of the liner or whatever. Probably as close to a cato as you get without it being one.
 

pyrobob

Well-Known Member
Joined
Dec 6, 2013
Messages
2,410
Reaction score
31
I bet this one rocket was hella loud!

[video=youtube;YmlgN4DRk2Y]https://www.youtube.com/watch?v=YmlgN4DRk2Y[/video]
Wow that was an awesome flight! Never seen it before so thanks for sharing.

In general, to me the sparkies are the loudest. It's a different kind of loud I guess but I do enjoy them nonetheless.
 

bobkrech

Well-Known Member
Joined
Jan 20, 2009
Messages
8,354
Reaction score
31
The higher the thrust, the louder the motor sound level.

For a given thrust, the higher level of combustion instability and afterburning, the louder the motor sound level.
 

Crash-n-Burn

Well-Known Member
Joined
Aug 14, 2014
Messages
379
Reaction score
1
Shoulda probably been a discussion that grouped motors by size or something
Yeah that was what I intended with the phrase "respective and equivalent case set". I get the idea that bigger is louder.

To redirect, which of the 54mm 3 grain motors is loudest? Seems there was a vote or two for whites.

Any difference on 38mm 3 grains? Do you feel there is consistency in noise (sparky is always the loudest in every case length)?
 

FredA

Well-Known Member
Joined
Jan 19, 2009
Messages
2,132
Reaction score
318
If you really wan to hear loud, static test on the ground.
When they fly away, the noise level goes down quickly.
When you burn the whole thing on the ground you'll be surprised how much noise you are missing when they fly.

So - High pressure motor being static tested gets my vote.
When we static tested a "P"....WOW!
 
Last edited:

DavidMcCann

Well-Known Member
Joined
May 15, 2016
Messages
2,656
Reaction score
166
It seems to me, based on personal experience, that red motor formulations (red lines, red lightning) are consistently the loudest in their respective and equivalent case set. Smokeys and Sparkies sounds disproportionately quiet.

Agree? Disagree? What are your favorite motors from a noise/sound perspective? Please add Loki formulations (and any other manufacturer) in, I'm not as familiar with them but didn't intend to limit this to CTI/AT.

Smokey's to me typically sound quiet. White Lightning is a pretty good roar, and I'd say Loki White put out a good amount of noise.

Sparkles tend to make a ton of noise to my ear. Skid mark, Dark Matter, Spitfire...all really loud head turners.
 

ksaves2

Lifetime Supporter
TRF Lifetime Supporter
Joined
Nov 25, 2009
Messages
5,981
Reaction score
294
If you really wan to hear loud, static test on the ground.
When they fly away, the noise level goes down quickly.
When you burn the whole thing on the ground you'll be surprised how much noise you are missing when they fly.

So - High pressure motor being static tested gets my vote.
When we static tested a "P"....WOW!
Fred is 100% correct. Test on the ground if one wants loud....... But there's not the fun of watching it fly.........Seeing it go and making one proud....... Running around to see where it lies.

In reality with Research it is sometimes prudent to static test before flying the configuration and risking a bunch of pricey hardware. Better to just blow a case than a case and a rocket. Kurt
 

FredA

Well-Known Member
Joined
Jan 19, 2009
Messages
2,132
Reaction score
318
Fred is 100% correct. Test on the ground if one wants loud....... But there's not the fun of watching it fly.........Seeing it go and making one proud....... Running around to see where it lies.

In reality with Research it is sometimes prudent to static test before flying the configuration and risking a bunch of pricey hardware. Better to just blow a case than a case and a rocket. Kurt


Flights usually shortly follow a successful ground test ;-)

There is a chicken coup nearby where we test - you should hear then squawking after a big ground test stops ringing through the valley.....
 

T34zac

Well-Known Member
Joined
Jul 23, 2014
Messages
910
Reaction score
13
Location
Massachusetts
Vmax and sparkies seem to be the loudest to me. C-star have a good roar to them as well (my favorite propellant).
 

kramer714

Well-Known Member
Joined
Jan 20, 2009
Messages
697
Reaction score
10
Ratt hybrid, actually 2 of them. Almost 130db (measured)
[video=youtube;xirKHQjEHng]https://www.youtube.com/watch?v=xirKHQjEHng"]https://www.youtube.com/watch?v=xirKHQjEHng[/video]https://www.youtube.com/watch?v=xirKHQjEHng
 

marcusSRG

Well-Known Member
Joined
Sep 14, 2012
Messages
892
Reaction score
1
Now that is cool. Are those motors even still around?

There's a 4x cluster of these that has been done as well.
 

dave carver

Nam Myoho Renge Kyo
Joined
Jan 18, 2009
Messages
4,972
Reaction score
4
Either a H1000 Teeling Tech or a Gumby, I can't remember the size but boy, it was loud!
 

legranddudu

Well-Known Member
Joined
Oct 20, 2011
Messages
972
Reaction score
1
Ratt hybrid, actually 2 of them. Almost 130db (measured)
[video=youtube;xirKHQjEHng]https://www.youtube.com/watch?v=xirKHQjEHng"]https://www.youtube.com/watch?v=xirKHQjEHng[/video]https://www.youtube.com/watch?v=xirKHQjEHng
cannot agree more. clustering hybrids is like talking the devil when he is pissed off...
 
Top