Yes, putting the mic in the middle compensates for the time it takes for the sound to get there.Labtecpower wrote:Would this be more accurate than measuring by a muzzle blast, and the projectile hitting a target?
Labtecpowers (soon-to-be) quick dump valve cannon
-
Gun Freak
- Lieutenant 5
- Posts: 4971
- Joined: Mon Jan 25, 2010 4:38 pm
- Location: Florida
- Been thanked: 8 times
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
-
clemsonguy1125
- Sergeant 5
- Posts: 1485
- Joined: Tue Jul 21, 2009 4:00 pm
- Location: East Coast
Nice cannon. How much space is there between the groove and the oring
-
Technician1002
- Captain
- Posts: 5189
- Joined: Sat Apr 04, 2009 11:10 am
The cardboard chronograph will need enough space between the sheets so the sound of the first impact has diminished enough to identify the sound of the second impact.
Can you identify both impacts in this wave?
Or this one?
Can you identify both impacts in this wave?
Or this one?
-
jackssmirkingrevenge
- Five Star General
- Posts: 26203
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 569 times
- Been thanked: 345 times
Tech, please tell me this is short for "analyse" 
- Attachments
-
- screenshot.jpg (25.11 KiB) Viewed 2083 times
hectmarr wrote:You have to make many weapons, because this field is long and short life
-
Labtecpower
- Sergeant 3
- Posts: 1297
- Joined: Sat Feb 20, 2010 6:38 am
- Location: Pyongyang
- Has thanked: 5 times
- Been thanked: 13 times
I can't see any impacts in that one
@clemsonguy:
The distance between to O-ring and the groove is currently zero. I was about 2 mm, but it leaked too much, so I decided to fill up the groove with some rubberbands to compress to O-ring against the valve housing. Now it holds pressure very well.
@clemsonguy:
The distance between to O-ring and the groove is currently zero. I was about 2 mm, but it leaked too much, so I decided to fill up the groove with some rubberbands to compress to O-ring against the valve housing. Now it holds pressure very well.
-
Technician1002
- Captain
- Posts: 5189
- Joined: Sat Apr 04, 2009 11:10 am
That screen shot isn't mine. I'm not using Windows. Need to ask the original poster.. I don't have a green start button.
On another machine I use Ubuntu Studio. Here is a screen capture of one of my machines.
No green start buttons for me.
Ubuntu; http://www.ubuntu.com/
Ubuntu Studio http://ubuntustudio.org/
The screen shot is from this thread;
http://www.spudfiles.com/forums/can-you ... 19369.html
I don't have a green start button.On another machine I use Ubuntu Studio. Here is a screen capture of one of my machines.
No green start buttons for me.
Ubuntu; http://www.ubuntu.com/
Ubuntu Studio http://ubuntustudio.org/
The screen shot is from this thread;
http://www.spudfiles.com/forums/can-you ... 19369.html
- Attachments
-
- Ubuntu start button isn't green.
-
MrCrowley
- Moderator
- Posts: 10078
- Joined: Fri Jun 23, 2006 10:42 pm
- Location: Auckland, New Zealand
- Been thanked: 3 times
Can't believe I never saw this thread, really nice build there Labtecpower.
As for trying measure the velocity of your shots, I found audio chronographs difficult with large cannons like yours, the muzzle blast causes too much disruption unless the microphone and targets are fairly far away.
If you're really interested in measuring the velocity, a photo-transistor chronograph are much easier to use and give more consistent results. They're pretty simple and cheap to construct too.
I realise it has been some time since the last post and this post may be unnecessary but I thought I'd post in case you were still working on a chronograph.
As for trying measure the velocity of your shots, I found audio chronographs difficult with large cannons like yours, the muzzle blast causes too much disruption unless the microphone and targets are fairly far away.
If you're really interested in measuring the velocity, a photo-transistor chronograph are much easier to use and give more consistent results. They're pretty simple and cheap to construct too.
I realise it has been some time since the last post and this post may be unnecessary but I thought I'd post in case you were still working on a chronograph.
-
Labtecpower
- Sergeant 3
- Posts: 1297
- Joined: Sat Feb 20, 2010 6:38 am
- Location: Pyongyang
- Has thanked: 5 times
- Been thanked: 13 times
Thank you !
I dropped the idea of an audio-chronograph, because of the trouble with searching for sound peaks, as you mentioned.
I saw that idea a year ago, when I was still in secondary school. I forgot it, because I tought it would be too difficult
It should be pretty easy now, as I have lessons in electrotechnics.
It shouldn't be too hard to get some phototransistors (or complete optical sensors) as I have some nice teachers at school, where I can buy them very cheap.
Thanks for waking up the chronograph project!
I dropped the idea of an audio-chronograph, because of the trouble with searching for sound peaks, as you mentioned.
I saw that idea a year ago, when I was still in secondary school. I forgot it, because I tought it would be too difficult
It should be pretty easy now, as I have lessons in electrotechnics.
It shouldn't be too hard to get some phototransistors (or complete optical sensors) as I have some nice teachers at school, where I can buy them very cheap.
Thanks for waking up the chronograph project!