LabRadar Question
- Thread starter savageshooter86
- Start date
Erik Cortina said:
I may be off base and I apologize, I did ask them a more specific question on this if it'll still give a velocity reading even though I'm shooting at 300 or 500 yards.
I may be over thinking it but from reports I read when this was first announced it receives the sonic wave of the bullet and if it doesn't get some sort of report back say an impact of the bullet at the parameter of the unit it'll have a false reading.
I'm not concerned with velocity say at the 300 or 500 yard Mark I'm just concerned if it'll still read if there's no impact or report of how it works at the 100 yard Mark.
dmoran
Donovan Moran
James -
Think of the LabRadar like driving by a cop sitting by the road with his radar gun.
You drive by, he reads your speed.
You go a little further, he could maybe still catch a read.
You get a ways past, and you can floor it, cause he can't read that far.
Same for the LabRadar.....
Forget what ever all images you have in your mind of how they work.
And just think of them like a Radar Gun.
Donovan
Think of the LabRadar like driving by a cop sitting by the road with his radar gun.
You drive by, he reads your speed.
You go a little further, he could maybe still catch a read.
You get a ways past, and you can floor it, cause he can't read that far.
Same for the LabRadar.....
Forget what ever all images you have in your mind of how they work.
And just think of them like a Radar Gun.
Donovan
JamesnTN – your confusion is this. The LabRadar uses sound to trigger to turn on. The sound however is from the muzzle blast and not the bullet impacting on the target/backstop. Once it triggers, it measures the bullet that it can detect with its radar that is heading towards the target that it is pointing to.
The idea of the sound trigger is to allow it to discriminate your shots from those of your neighbors so that it is not measuring all the shots going out.
The idea of the sound trigger is to allow it to discriminate your shots from those of your neighbors so that it is not measuring all the shots going out.
Jay Christopherson
Not An Admin
JamesnTN said:
You are over-thinking it...
EDIT:
From Labradar:
How does LabRadar work?
LabRadar velocity measurements are based on Continuous Wave Doppler Radar and advanced Digital Signal Processing Technologies.
It's basically a doppler-radar. Impact has ZERO to do with it's readings. It's not an acoustic chronograph. It takes readings from 0 - 100 yards. It basically tracks the bullet out to 100 yards and provides velocity based on that. At 300 or 500, or 1,000,000 for that matter, it's going to track the bullet from 0 - 100 yards and provide you a velocity based on that.
An Oehler or PVM gives you a reading at 10 feet (or wherever you set it up at), regardless of how far away the target is. Your Magnetospeed will give you a reading at (essentially) 0, regardless of how far away the target is. The Labradar will give you a reading based the bullet passing through it's tracking zone (0 - 100 yards) regardless of how far away the target is.
Joe, if you are trying to get me to give you specific answers, I cannot. I know as much as the next guy who reads the FAQ in their website. I can guess that you can adjust sensitivity of the mic that picks up the muzzle blast from your gun vs. one that is not close but it is only a guess. It is likely not anymore foolproof than any of the shot timers that I have used.Joe Salt said:
What I am trying to do here is to help clarify the confusion about noise activation relative to muzzle blast which is what LabRadar tells us it is using vs. impact noise which is what JamesnTN was thinking.
dmoran
Donovan Moran
Joe -
Simply, every time it is triggered would start a new phase.
So if your buddy shoots on Bench 15 right after you (or visa verse), it will trigger to new cycle, no matter if it reads the shot or not (wouldn't matter). Same for the next triggering..... and so on.....
Or is how I perceive them to work
Donovan
Simply, every time it is triggered would start a new phase.
So if your buddy shoots on Bench 15 right after you (or visa verse), it will trigger to new cycle, no matter if it reads the shot or not (wouldn't matter). Same for the next triggering..... and so on.....
Or is how I perceive them to work
Donovan
James, I would be concerned about doing load development with a magnetospeed on my barrel. I would assume it would be similar to a tuner and would affect the barrel harmonics leading to different nodes when attached versus when not attached. The LabRadar I could use while doing load development and would not have to shoot through traditional chrony windows. That is my draw to this system.
Your thoughts?
Your thoughts?
kyreloader said:
I had the same concerns as well, I've not found any degrade in accuracy by using one. I have noticed a slight impact difference though. The groups tend to group at 500 yards 1"-1.5" lower with it on over it being off. This is using the Dasher and a HV contour barrel. On the 300 WM I've not noticed any impact difference with it on or off and that barrel is 1.3" in dia.
Now here's my confusuioj on how the lab radar works or how I perceivednit to.
On a standard chronograph the first beam is triggered by the bullet, then the second beam is triggered as well. The software calculates the time it goes thru both beams and gives the speed of the bullet.
I assumed since the lab radar uses radar like say the police use the muzzle blast triggers the sensor then somehow there has to be a report back from the time its triggered and the path of the bullet. Again radar gun you pull the trigger to activate it sends a pulse to the object and bounces back and software calculates the speed based on that time. So here we are with the labradar triggered what then happens to report back? I assumed the bullet impact down range, the unit can't see the bullet nor can it detect flight of it. So where or how is it reporting a time of flight to calculate the velocity?
Again me thinking and it may be simple and I'm over thinking as I've said. But there has to be some sort of time of flight from trigger 1 to trigger 2 in order to calculate speed right plus a known distance between the two.
Guess this is why I'm not into electronic engineering as a career.
Jdne5b
Gold $$ Contributor
JamesnTN said:
It functions the same way as radar gun used on a baseball or tennis ball or police radar. The radar bounces off the bullet multiple times during the flight of the bullet and then reads the return time of each reflection. It's a continuous wave, not just one. Thats why it gives you a velocity at multiple distances out to ~100 yards.
Actually now that I am thinking more about it, I remember the company talking about the radar being able to discriminate between shots from the owner and surrounding shots. My guess is it uses the information from the radar to weed out shots with bullets that has a lateral component which would be present from shooters shooting on the side. This is probably the reason why you have to first physically aim the radar at the target before you use it.jlow said:
James TN,
Maybe this will help... I was a radar tech in the Army a long, long time ago....
The Lab Radar will work using continuous wave radar (CW) as opposed to pulse radar. Pulse radar sends out a pulse of energy and when it is reflected off the object the time difference is measured to give the range. CW radar uses the Doppler Effect or phase shift (somewhat like a train whistles sound changes as a train passes you). The frequency shift is measured by the unit and figures the bullets speed as it moves down range. When you press the ARM button on the unit to activate it I assume the unit will start sending CW waves down range until you press the ARM button again to stop it. While it is armed it will continue to record each bullets speed as you fire it. This is the same as a policeman pulling the trigger on his radar gun. It will remain on and give him your speed until he releases the trigger.
Maybe this will help... I was a radar tech in the Army a long, long time ago....
The Lab Radar will work using continuous wave radar (CW) as opposed to pulse radar. Pulse radar sends out a pulse of energy and when it is reflected off the object the time difference is measured to give the range. CW radar uses the Doppler Effect or phase shift (somewhat like a train whistles sound changes as a train passes you). The frequency shift is measured by the unit and figures the bullets speed as it moves down range. When you press the ARM button on the unit to activate it I assume the unit will start sending CW waves down range until you press the ARM button again to stop it. While it is armed it will continue to record each bullets speed as you fire it. This is the same as a policeman pulling the trigger on his radar gun. It will remain on and give him your speed until he releases the trigger.
Well then I'll wait till they get some out there, Oh as for the one that goes on the Barrel it does make quite the difference in elevation a 1000, tried one of the guys at the range. Didn't shoot that many rounds to get an Idea of grouping, was just trying different loads for speed comparison between my Oehler.
Joe Salt
Joe Salt
I just want chrony results while load testing and not have to worry about shooting the unit or readings being off due to changing light conditions. This unit seems to be the answer
Would be good to see testing vs Oehler to verify consistency. LabRadar should have included this in their marketing material
Would be good to see testing vs Oehler to verify consistency. LabRadar should have included this in their marketing material
For me the huge advantage of the lab radar is this.....
Our range has staggered bunkers at 25,50,100,200,350.
I can get there at off times and often shoot all alone.
So i should be able to plunk the lab radar in ONE spot and proceed to shoot my 357 at 25 yds...my 3030 at 100....my 270win at 200....my 300win at 350.......ALL WITHOUT GETTING UP AND MOVING THE CHRONO........SWEEEEEEEEET!
Our range has staggered bunkers at 25,50,100,200,350.
I can get there at off times and often shoot all alone.
So i should be able to plunk the lab radar in ONE spot and proceed to shoot my 357 at 25 yds...my 3030 at 100....my 270win at 200....my 300win at 350.......ALL WITHOUT GETTING UP AND MOVING THE CHRONO........SWEEEEEEEEET!
dmoran
Donovan Moran
kraky said:
+1 ...... those type scenario's will be sweeeeeeet
And can't help but think it will innovate the industry to more "gadget" makers building similar and advanced models.
Radar is the future... as I see it, taking presidence over sensor, magnetic, and acoustic types.
Donovan
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