1. Controlling force , F _{c1} = m.ꞷ _{1}^{2}.r _{1}_{Newton.} where, m = total mass of balls  0.5 Kg.
2. Sensitiveness : It is the ratio of difference
between the maximum and minimum . equilibrium speed to mean equilibrium
speed.
Practically, from no load to full load operation of the engine, a definite _{ }
^{, }^{m}^{ovement of fuel }^{control }element ( _{throttle or}_{ }_{fuel}_{ }_{pump) is required. }
_{ }
_{ If x1 is sleeve position at no load (upper position), and x2 is sleeve position at full load,}
_{ (lower position) then speeds corresponding to these positions, N1 & N2 are maximum }
_{ and minimum equilibrium speeds. Thus , sensitiveness of governor can be determined }
_{ for any two positions of sleeve, x1 and x2.}
_{ }
_{ Sensitiveness = 2 {(N1 – N2)/ ( N1 + N2 )}.}
_{ }
_{ This is sensitiveness between sleeve positions x1 and x2.}
_{ 3. }_{Governor Effort}_{ : It is the mean force required on the sleeve to raise or lower it for given}
_{ charge in the speed. For convenience, in comparing different types of governors, it is usual}
_{ to define the effort which will be applied for 1% change of speed.}
_{ If, c = percentage increment of speed (expressed as fraction).}
_{ Governor effort, Q = (W + w).c Newton.}
_{ 4}_{. }_{Governor power}_{ : It is the work done at the sleeve for a given change of speed.}
_{ }_{Governor power, P = Q . x1 Nm}
_{ }
2 ) Proell Governor :
Data

Length of links, 1 = 0.130 m.

height of’ vertical ball arm, a = 0.070 m

Ang1c between vertical ball arm and lower link – 150^{0}.
Mass of sleeve and balls, initial radius of rotation and distance between top
and bottom link are same as Porter governor.
CALCULATIONS :
Radius of rotation at speed N_{1,}
r_{1} = 0.05 + s_{1} + d_{1}mtr.
Now, finding C_{1} similar to Porter governor, at speed N_{1}.
Applying pythagores theorem
S_{1} =
Ѳ = tan^{1} (C_{1} / S_{1} )
As total included angle of link EFH is 150^{0}
Ѳ_{1 }+ α + 90 = 150
α_{1} = (60 – P_{1})^{2}
d_{1} = a sin α_{1}.
= 0.07 sin α_{1}
∴ r_{1 = }(0.05 + S_{1 }+ d_{1}).
Similar to Porter governor
_{ }1. Controlling force, Fc = m. ꞷ_{1}^{2}. r_{1} Newton.  (m = ______kg)_{ }
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