Umarex Notos CRK Review

[miksatx]

have a 8 chamber on the plate at 5:30am. new spool of black petg.

[tennx]

Are these guns really loud enough to require an after market silencing system?  Fair enough... I get the tinkering thing.

Some of y’all”s tinkering is too advanced for this old man..lol….after a day of shooting 2 stock PCP’s yesterday….convinced me nobody gives a hoot….lol…from now on I think Im leaving new purchases  OEM….good luck

[Firewalker]

have a 8 chamber on the plate at 5:30am. new spool of black petg.

You da' man, Mike!

[Firewalker]

Are these guns really loud enough to require an after market silencing system?  Fair enough... I get the tinkering thing.

I have 2 Franken-Chasers, it's ALL about the tinkering!

Some of y’all”s tinkering is too advanced for this old man..lol….after a day of shooting 2 stock PCP’s yesterday….convinced me nobody gives a hoot….lol…from now on I think Im leaving new purchases  OEM….good luck

[miksatx]

58% 9hrs! lol

[Firewalker]

58% 9hrs! lol

 

[subscriber]

58% 9hrs! lol

I check my STL files with Cura to see if there are any problems before passing on the designs to others.  Very occasionally there is something that gets misinterpreted, such the inside bore of an LDC being full of material recently

Anyway, I cringe when I see how many hours the prints are predicted to take.

[Insanity]

58% 9hrs! lol

I check my STL files with Cura to see if there are any problems before passing on the designs to others.  Very occasionally there is something that gets misinterpreted, such the inside bore of an LDC being full of material recently

Anyway, I cringe when I see how many hours the prints are predicted to take.

Buy a 3d printer and have the full experience. I had a part say 16 hours that took 20.

[miksatx]

58% 9hrs! lol

I check my STL files with Cura to see if there are any problems before passing on the designs to others.  Very occasionally there is something that gets misinterpreted, such the inside bore of an LDC being full of material recently

Anyway, I cringe when I see how many hours the prints are predicted to take.

do you have a printer listed  in cura? seems you need one listed to get a time after slicing.

[subscriber]

do you have a printer listed  in cura? seems you need one listed to get a time after slicing.

A very good point, Mike.  I have Creality Ender-3 selected, but that may not be what you are using. 

My primary purpose is to look at the layers to see that nothing has been corrupted.  That happens so rarely that I might be tempted to drop this step.  On the other hand, if you are 8 hours into a print, only to find that the projectile path is blocked in some section, you and your customer are going to be miffed; and rightly so.  And I am talking about something that does not appear in my original 3D CAD solid model, but was misunderstood somewhere in the conversion
 for printing process.

So, spending a few minutes to check for trouble is the least I can do, to not waste your time, materials and attention.   Some of my more complex designs take longer to design that they do to print.  So, 5 minutes on top of that is cheap insurance.  The one you are printing for Dave now was much faster than that, but still took several hours to design.

[Firewalker]

do you have a printer listed  in cura? seems you need one listed to get a time after slicing.

A very good point, Mike.  I have Creality Ender-3 selected, but that may not be what you are using. 

My primary purpose is to look at the layers to see that nothing has been corrupted.  That happens so rarely that I might be tempted to drop this step.  On the other hand, if you are 8 hours into a print, only to find that the projectile path is blocked in some section, you and your customer are going to be miffed; and rightly so.  And I am talking about something that does not appear in my original 3D CAD solid model, but was misunderstood somewhere in the conversion
 for printing process.

So, spending a few minutes to check for trouble is the least I can do, to not waste your time, materials and attention.   Some of my more complex designs take longer to design that they do to print.  So, 5 minutes on top of that is cheap insurance.  The one you are printing for Dave now was much faster than that, but still took several hours to design.

I greatly appreciate your work on this project!

[gendoc]

Airgun Archery Fun has magazines too I believe they will work according to Wes
https://airgunarcheryfun.ca/pp750-magazine-22-cal-new-design-8-shots/

its been 10 days since i placed an order from Wes, and i still have not seen the item and it looks like 3 more days......thats about the same time frame as receiving a custom mag from Darko (Carm) in Croatia.
his mags are perfect in my opinion and from owning many different types.

[Spacebus]

Airgun Archery Fun has magazines too I believe they will work according to Wes
https://airgunarcheryfun.ca/pp750-magazine-22-cal-new-design-8-shots/

its been 10 days since i placed an order from Wes, and i still have not seen the item and it looks like 3 more days......thats about the same time frame as receiving a custom mag from Darko (Carm) in Croatia.
his mags are perfect in my opinion and from owning many different types.

It took me way longer to get my CARM mags than any order from Wes, but I am also in Maine. Maybe it's different for other places. That being said, the CARM mags are better having tried both.

[subscriber]

I greatly appreciate your work on this project!

I hope it measures up to your expectations.

The funny thing is that it is easier to make a loud airgun tolerable, than a tolerable airgun near silent.  Anyway, I predict something along the lines of your stock Notos going from around 87 dB to around 77...  Of course, it all depends on where and how you measure it.  For me, it is more important to reduce the snap in the sound, so it is less "ear catching", than absolute loudness. 

Going below 75 dB is very hard, especially when people place their meter a foot in front of the muzzle, or near their target.  "Trap-slap" can be louder than the muzzle report, so the target should be far away, if possible.  What you (and your neighbor) hear, or think you hear matters more than any dB meter reading.

[Firewalker]

I greatly appreciate your work on this project!

I hope it measures up to your expectations.

The funny thing is that it is easier to make a loud airgun tolerable, than a tolerable airgun near silent.  Anyway, I predict something along the lines of your stock Notos going from around 87 dB to around 77...  Of course, it all depends on where and how you measure it.  For me, it is more important to reduce the snap in the sound, so it is less "ear catching", than absolute loudness. 

Going below 75 dB is very hard, especially when people place their meter a foot in front of the muzzle, or near their target.  "Trap-slap" can be louder than the muzzle report, so the target should be far away, if possible.  What you (and your neighbor) hear, or think you hear matters more than any dB meter reading.

True that but sound measurement is the only quantifiable method we have to determine pressure levels.

What my neighbors hear is unimportant to me and them as well. This is solely an exercise in proof of concept that may open a closed eye or two and get a few excited about tinkering/modifying their guns.

[avator]

I greatly appreciate your work on this project!

I hope it measures up to your expectations.

The funny thing is that it is easier to make a loud airgun tolerable, than a tolerable airgun near silent.  Anyway, I predict something along the lines of your stock Notos going from around 87 dB to around 77...  Of course, it all depends on where and how you measure it.  For me, it is more important to reduce the snap in the sound, so it is less "ear catching", than absolute loudness. 

Going below 75 dB is very hard, especially when people place their meter a foot in front of the muzzle, or near their target.  "Trap-slap" can be louder than the muzzle report, so the target should be far away, if possible.  What you (and your neighbor) hear, or think you hear matters more than any dB meter reading.

True that but sound measurement is the only quantifiable method we have to determine pressure levels.

What my neighbors hear is unimportant to me and them as well. This is solely an exercise in proof of concept that may open a closed eye or two and get a few excited about tinkering/modifying their guns.

This is exactly why I messed with the baffles and venting the shroud on my Fortitude and did the same to a Maximus after adding the Fortitude shroud to it... not to quiet it but, for the experience.

[subscriber]

Dave,

The problem with getting an objective measure for sound is that unless you do it industry standard with a calibrated meter intended for muzzle report, you and your mates are using what amounts to an "elastic tape measure".  Rather than argue about absolute values, the thing to do with cheapo meters and apps is to compare before and after.  The change is less likely to be way off that the absolute measure.  Assuming your meter and setup do not "peg" or clip.

If before and after measure the same, chances are that you have reached the max level the meter can capture.  Or the measurement period is way off.  So, if you hear a clear drop that seems about half as loud, that is a 6 to 10 dB reduction.  If you can just tell a difference by ear, it is only 3 dB.  More to the point, if you hear a clear difference and the meter reads the same, the meter is wrong, or used incorrectly.

When you get that far, shoot with the "can" empty, then the original insert, then the alternatives; and so on.  I predict that the original insert is taking off 10 dB from the empty can.

The closer your meter is palced, and the more directly in front of the muzzle, the more only a few inches in relative placement and a small change in angle will skew the readings. 

Sound pressure drops off with the inverse square of the distance.  So the same reading at 3 feet will be four times louder than at 6 foot. 

Sound is very directional, so being level with the muzzle to the side is much quieter than being in front of the muzzle.  Being at normal cheeckweld position is a lot quieter than level with the muzzle. 

What ever you do, be sure to repeat it.  Also, you have to be able to call a reading BS if it is.  For instance, if you fired a .223 centerfire rifle and your meter gave the same reading as you airgun, the readings are decidedly suspect.  Just because a reading is reported by an expensive instrument does not make it real.  There are several other requirements that have to be met.  Even more so for a cheap meter.

Judging airgun report is a bit like judging music.  A meter may tell you how loud it is at a certain distance, but only human ears and minds can decide if the sound is pleasing or not.  In other words, once you are no longer concerned with "hearing safe",  muzzle report improvements are very subjective.  Nothing wrong with that.  It is like preferring the feel and balance of one rifle over another.  Subjective, but valid.

[miksatx]

15hrs32mins!

[subscriber]

Looks good, Mike

[miksatx]

Looks good, Mike

2.467oz think ya got a hit!