492  Airplane  Engine  Encyclopedia

TREBERT

The  Trebert  Engine  Works  constructed  two  types  of  air-
plane engines  about  1912,  The  air-cooled  rotary  type,  rated
at  60  h.p.,  had  six  cylinders  arranged  with  axes  parallel  to
the  central  shaft.  The  bore  was  3.75  in.,  the  stroke  4.25  in.,
and  the  total  displacement  281.64  cu.  in.  The  propeller  speed
was  reduced  one-half  by  small  bevel  gears  at  the  inner  end
of  each  shaft  meshing  with  the  large  central  gear.
The  cylinders  were  of  cast-iron  construction  and  em-
ployed rotary  type  valves.  A  Panhard  carburetor  supplied
the  mixture,  and  Mea  magnetos  the  ignition.  The  weight
(completely  equipped)  was  said  to  be  230  lbs.,  or  3.83  lbs.
per  rated  h.p.  The  overall  length  was  22  in.,  and  the  outside
diameter  15.5  in.
Fig.  468.    The  Trehen  Six-Cylinder  Barre'l  Rotary  Type  Engine

An  eight-cylinder  water-cooled  Vee  type  engine  of  4.875
in.  bore,  5  in.  stroke,  and  746.6  cu.  in.  total  displacement,  was
rated  100  h.p.  at  1200  r.p.m.  One  of  the  outstanding  features
of  this  engine  was  the  piston  valve  design.  The  "L"  head
cylinders  with  integral  water  jackets  were  made  from  cast
iron.  The  crankshaft  was  supported  in  five  bearings,  and
the  articulated  type  connecting  rods  employed  "H"  sections.
The  pistons  were  made  from  cast  iron  and  fitted  with  three
rings.
Panhard  carburetors  supplied  the  mixture,  and  Mea  mag-
netos the  ignition.  A  splash  system  of  lubrication  was  em-
ployed, the  valves  being  lubricated  by  introducing  oil  into  the
fuel.     The  weight  was  said  to  be  350  lbs.,  or  3.5  lbs.  per  rated


Trebert— Union  493

h.p.     The  overall  dimensions  were  as  follows:  length  48  in.,
width  26.5  in.,  and  height  30  in.
Fig.  469.    The  Trebert  Eight-Cylinder  Engine.
