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2. Poinsard 25hp 2-cyl - Wikipedia

   en.wikipedia.org/wiki/Poinsard_25hp_2-cyl

   The Poinsard 25 hp or Mengin Type B is a small, two-cylinder, air-cooled, horizontally opposed aircraft engine built in France. it was manufactured by Établissements Pierre Mengin from a design by René Poinsard. Power was around 19 kW (25 hp) at 2,280 rpm.

3. Reciprocating compressor - Wikipedia

   en.wikipedia.org/wiki/Reciprocating_compressor

   A reciprocating compressor or piston compressor is a positive-displacement compressor that uses pistons driven by a crankshaft to deliver gases at high pressure. [ 1 ] [ 2 ] Pressures of up to 5,000 psig are commonly produced by multistage reciprocating compressors.

4. Bourke engine - Wikipedia

   en.wikipedia.org/wiki/Bourke_engine

   A test of a 30 cubic inch Vaux engine, built by a close associate of Bourke, gave a fuel consumption of 1.48 lb/(bhp hr), or 0.7 (lb/hr)/hp at maximum power. [6] Power to weight - The Silver Eagle was claimed to produce 25 hp from 45 lb, or a power-to-weight ratio of 0.55 hp/lb. The larger 140 cubic inch engine was good for 120 hp from 125 lb ...

5. Opposed-piston engine - Wikipedia

   en.wikipedia.org/wiki/Opposed-piston_engine

   A variation of the opposed-piston design is the free-piston engine, which was first patented in 1934. Free piston engines have no crankshaft, and the pistons are returned after each firing stroke by compression and expansion of air in a separate cylinder. Early applications were for use as an air compressor or as a gas generator for a gas turbine.

6. Stroke ratio - Wikipedia

   en.wikipedia.org/wiki/Stroke_ratio

   Oversquare engines (a.k.a. "short stroke engines") are very common, as they allow higher rpm (and thus more power), without excessive piston speed. Examples include both Chevrolet and Ford small-block V8s; the GMC 478 V6 has a bore/stroke ratio of 1.33. The 1.6 litre version of the BMW N45 gasoline engine has a bore/stroke ratio of 1.167.

7. Pneumatic motor - Wikipedia

   en.wikipedia.org/wiki/Pneumatic_motor

   Piston motors are often used in series of two, three, four, five, or six cylinders that are enclosed in a housing. This allows for more power to be delivered by the pistons because several motors are in sync with each other at certain times of their cycle. The practical mechanical efficiencies attained by a piston air motor are between 40–50% ...