16 Joules ?

[TaxiDriver]

As a measurement of an air rifles output in ft/lbs ?

 

My air rifle is a Gammo CFX 16J .22

 

Now I, assuming 16J to be Joules (Joules being a measurement of energy(?))

but can anyone tell me please what that equates to in ft/lbs

[Vipa]

As a measurement of an air rifles output in ft/lbs ?

 

My air rifle is a Gammo CFX 16J .22

 

Now I, assuming 16J to be Joules (Joules being a measurement of energy(?))

but can anyone tell me please what that equates to in ft/lbs

 

11.8

[TaxiDriver]

11.8

Thanks for that

Can I ask how you arrive at that figure? Is there a chart or calculation/formula ?

[kyska]

1 joule = 0.737 Ft/lb

[jason airarms tx]

1 joule = 0.737 Ft/lb

hello fellow member,what part of south nottm /leicester border are you?do you know clifton?thats where im from down the old a453

[Albion]

Thanks for that

Can I ask how you arrive at that figure? Is there a chart or calculation/formula ?

 

Physics 101:

 

Energy = force x distance ....or as we know it lbs x feet

 

Joules = newtons (force) x metres (distance)

 

 

So it's easy to convert now:

 

1 Newton = 0.225 lbs

1 metre = 3.281 ft

 

so... 1 Joule = 0.225 x 3.281 = 0.738 ftlbs

 

[dougall]

or of course there is

 

10sa+1qs=1BS.

 

10 stella artois plus one quick squirt equals 1 big sleep.

[kyska]

hello fellow member,what part of south nottm /leicester border are you?do you know clifton?thats where im from down the old a453

 

I do know clifton, I work at QMC, have get through the ******* crusader roundabout if my shifts aren't right!

[HW682]

Physics 101:

 

Energy = force x distance ....or as we know it lbs x feet

 

Joules = newtons (force) x metres (distance)

 

 

So it's easy to convert now:

 

1 Newton = 0.225 lbs

1 metre = 3.281 ft

 

so... 1 Joule = 0.225 x 3.281 = 0.738 ftlbs

 

 

Nicely done Albion.

And now for Answering Questions 101....take a few seconds to step back and make sure the answer you have written at least makes sense.

 

So with units of ftlb.

If we think of a pellet with a given mass and speed.

If the mass goes up (for the same speed) what happens to the energy? with ft lb units, when mass goes up the answer goes up, so that makes sense.

 

Consider the often mentioned ft/lb.

Now if the mass goes up the answer would go down (as we are DIVIDING by mass).

Does it make sense that for a given speed a heavier pellet has less energy? not really.

 

Added: this over simplified as the lb is actually lbforce not mass - but it is an easy way to remember the units. Doesn't make sense to divide by lb (whether force or mass).

Edited May 19, 2011 by HW682