-
FREE MEMBER
NO Posting or PM's Allowed
-
03-24-2009 02:41 PM
# ADS
Friends and Sponsors
-
Contributing Member
a quick calculation if you use the cyclic rate of a t31 which is approximately600 rounds per minute - or 10 rounds a second - oprod travel is 8.66 inches per cycle - so the rate is 86.6 inches a second which = 5 miles per hour
very rough calculation
-
-
-
Head Moderator
(Founding Partner)
![](images/contributing.gif)
![](images/advisory.gif)
Site Founder
![Quote](images/tacticalgamer/misc/quote_icon.png)
Originally Posted by
cary m2a
Just for fun
Does anyone know the average speed of an
M1![icon](autolinker/images/link6.gif)
oprod using M2 Ball ammo?
Cary
Laden or unladen?
-
-
FREE MEMBER
NO Posting or PM's Allowed
Start with full en bloc of 8. Laden.
Cary
-
FREE MEMBER
NO Posting or PM's Allowed
![Quote](images/tacticalgamer/misc/quote_icon.png)
Originally Posted by
Stevo
Laden or unladen?
African or European?
-
FREE MEMBER
NO Posting or PM's Allowed
Seems like I read sometime back about 26 feet per second.
-
Contributing Member
86.6 (inches per second) = 7.21666667 feet per second that was with a cyclic rate of 600 rounds per minute
M14
was 750 rounds per minute
26 fps is mighty fast be very intrested if you could find that spec published somewhere
-
-
FREE MEMBER
NO Posting or PM's Allowed
![Quote](images/tacticalgamer/misc/quote_icon.png)
Originally Posted by
Mark in Rochester
86.6 (inches per second) = 7.21666667
26 fps is mighty fast be very intrested if you could find that spec published somewhere
I'll see if I can find that again. May take just aa little bit.
Rob
-
FREE MEMBER
NO Posting or PM's Allowed
This is the only place I can find it for now. This may be the article I was thinking of.
http://www.scott-duff.com/oprods.htm
Mark I see where your figure is from but would there not be a little idle time at the end of the cycle therefore increasing the speed figure?
I'm no mathematician, this is just something I read.
It's about half way down the page.
-
Contributing Member
Ok Rob
That makes more sense "the maximum speed is under 26 feet per second"
I would expect the maximum speed would result in the pressure stroke of the op-rod and the return stroke would be less.
what I was trying to calculate was average
yes there would be a small idle time as the op-rod reverses direction - this would have the opposite effect - if the cycle time was longer there would be less cycles per minute or second
so lets say we have 8 cycles in 20 seconds
so back and forward is 8.66 inches each time so (8*8.66) 69.3 inches in 20
seconds
Now lets increase the time and say we have 8 cycles in 30 seconds 69.3 inches in 30 seconds. more time to travel the same distance.
think that is correct
I will see if I can find the springfield study
-