This paper presents results of an experimental program to determine loss coefficients for several flat oval elbows, i.e., 90[degrees] easy bend elbows
, mitered 90[degrees] easy bend elbows
with and without vanes, and mitered 90[degrees] hard bend elbows
with and without vanes.
Keeping the back fairly straight, slowly bend elbows
behind you about 5 or 6 inches and then straighten.
so hands are at shoulder height, palms facing out.
, keeping them close to body bringing weights toward shoulders, push up over head until arms straight again.
Extend legs and bend elbows
with your hands stacked, one on top of the other, under your chin.
and slowly lower a few inches, keeping tummy muscles tight.
close to torso, keeping hands close to chin in loose fists, like a boxer.
and squeeze shoulder blades, lifting weights until elbows are alongside rib cage.
Drop head between arms and bend elbows
. Lower your chest and body into a horizontal line, keeping torso about 6 inches off the floor.
down to a 90 degree angle while bending the knees and lowering your bottom towards the floor.