AGD, What type of Chrono used in lab?

[cledford]

AGD,

In post http://www.automags.org/forums/showt...threadid=21205 I see an Angel being aimed through the tell-tale dual triangles created by a light based chronograph's diffusers and support struts.

I'm wondering what type of chrono you are using, and how many BPS it can record. Also, does it work on normal light, or infrared?

I've got a CED Millennium chronograph that is totally electronic, has an infrared option (I'm waiting on the kit), and will data link to a PC. (purchased it a few years back for handloading hobby...) I called the manufacturer today to find out the number of shots per second it will accurately record using the infrared option (want to use it for paintball) and was told that it has accurately recorded all shots fired in strings from a full-auto M-16. The cyclic ROF (if I recall correctly from my military days) for the old M-16 was 600 rounds per minute, and is 800 RPM for the newer M-16 A2 - that would be 10 shots per second for the old and 13.3 for the A2. Keep in mind that theses rounds are doing in excess of 2800 feet per second! Anyhow, due to the slow speed of paintballs, and the their huge size (in relation to some other much smaller projectiles being recorded with the CED) the gentleman at shootingsoftware.com (the guy who wrote the data-link software) feels that there should be no problems recording paintballs up to at least 14BPS.

I want to set up a lab in my new garage (just moved into a new apartment) and one the projects I'd like to fool with is to check the consistency of the velocity of paintballs at the higher ROFs (10-14 balls per second). I plan on testing my Emag (9BPS), Shocker (11BPS), and Intimidator (14BPS) all on full-auto to see how well things are working at such high cyclic rates.

I was wondering what the max. ROF your chrono would record, how much such a piece of equipment might run, and if you've have any experience with the CED product.

The CED is about $179 with connectivity kit, and the infrared option is $89 more.

Thanks for any help,

-Calvin

PS. The URL for the CED product is:

http://www.cedhk.com/shoot_pro2.html (click on the FAQ link for more info - little thin but gives an idea...)

The URL for the new data-link SW is:

http://www.shootingsoftware.com/ (click on downloads)

[Army]

I believe it's a PRO-chrono from Competition Electronics http://www.competitionelectronics.com/firearms.html

Which particular model, I don't know, but it has a printable readout.

[zads27]

I didn't take the supertour myself, but I believe his chrono has three triangles, which is basically two chronographs, which takes two readings per shot, to ensure consistant and calibrated chrono readings.

[manike]

I would really like to know if there is a chrono capable of taking fps readings upto and over 20bps.

Does anyone know if such a device exists? AGD?

manike

[AGD]

Calvin,

It's the Oehler 35P Dual Skyscreen Coronograph. It is a double crono that compares the first to the second and only gives you a result if both readings are within about 1/2 fps. This one is not infrared it needs a steady light source above the screens. I don't know of any cronos that record FPS at high speeds. What we usually do is get going along side it and then swing over the crono at speed.

AGD

[manike]

Originally posted by AGD
What we usually do is get going along side it and then swing over the crono at speed.

That's what I have been trying to do :) I would like to measure a whole string of shots though for consistency.

I wonder if with your chrono that means occasionaly shooting the light shades... ahh well better than shooting the keyboard on the gun dyno computer I guess

manike

[RobAGD]

A long time ago I had a long talk with the people at PACT about making a chrono that could time at 15bps. They said it should be a problem with the info I gave them at teh time, the probelm was as it alway is with my "little" side projects was the cost. I would need to buy the intire first run before they would even crack the new software for it. And I wasn't to happy about spending several grand on chronos.

Iw ould think if you used a VERY ir reflective ball you might be able to get close to 20bps if the software can handle taking readings that fast.


-Robert

[Webmaster]

Thats what I am interested in too. Id like to be more in depth in my articles and product reviews - to be able to report consistancy on strings, and to measure any shoot down...

But I would need something that is not dependent on light - as I test alot of things a the nearest range - which happens to be in a cave...

[cledford]

According to CED...

According to the folks are CED, they are the ONLY people who can do multiple shots per second. It is due to the fact that their entire system is electronic based.

Evidently, the sensors themselves have onboard memory, and queue the events and the time splits, so that the data is not affected by the time it take to transmit to controller unit over the 20 foot connection cables.

The infrared isn't required for the high BPS, it will just allow for accurate indoor testing.

I've got the unit, and plan on getting the infrared upgrade. I'll post here how it works out.

-Calvin

[manike]

Great info. Do you know of a website for them and possible what BPS they may be able to measure? I've seen some that are supposedly good for 10bps but I really want to be able to measure into the 20-30bps range if possible.

manike

[cledford]

The URL is posted above. They claim to be able to do somewhere between 10-14, and aren't sure but hopeful that they could do higher.

For technical questions call the guy who writes their data-link software - his site is listed also.

-Calvin

[50 cal]

I once saw a chronograph at Eglin AFB in Fl that would chrono every shot from the minigun on an A10 Warthog. Was actually pretty cool to see.