Value will depend upon physical and mechanical condition. In excellent condition this model is selling in the $US 400 +/- $US 35 range. In poor condition they are selling in the $150 or less range, depending upon whether they work or not.
(Pi x R x R) x H... Where R is the radius of the shaft and H is the height.
Let the cylinder have radius R and height h Let the cone have radius r and same height h Then: Volume cylinder = πr²h Volume cone = ⅓πR²h If the volume are equal: ⅓πR²h = πr²h → ⅓R² = r² → R² = 3r² → R = √3 r → ratio radii cone : cylinder = 1 : √3
The U value is the inverse of the R value. For R value 19 insulation the U value is 1/19, or 0.0526.
Volume of a cylinder = PI r^2 h, where r is the radius and h is the height r = 4h (given) Substitute r=4h in the formula Volume = PI (4h)^2 h V = 16 PI h^3
The formula for the volume of a cylinder is pi*r*r*h. So, substitute 2r for r (double radius) and leave h as it is: pi*(2r)*(2r)*h = 4pi*r*h. Therefore the new volume is four times that of the original volume.
50-140 or so
'AR' prefix indicates 1977
not sure of year made, but the model 999 is a collectable item under the H & R collectables. but price depends on condition...................
50-100 USD or so
50-125 USD or so
An H&R Sportsman with that serial number was made circa 1937-38. Value depends upon condition: Exellent $300 +/- $25, down to fair $125.
I believe it was made in 1973. I also have one with an AL prefix.
50-125
170 USD or so
The year of manufacture for the H and R with a serial number of 999 is 1979. The 1979 H and R with a model/serial number of 999 is worth around $250 in good condition.
50-100 USD or so
About $150-$175, depending on condition.