Subject: Simple Cycle engine
From: Rotary Engine
Date: 3/26/2006, 2:52 PM
To: AAme


Hi Paul and All,
after some thought and research, it appears to me that the Simple Cycle
Engine is the combination of two old ideas from the 30s and 40s.
The blower scavenged two stroke was used in the TS3 Commer diesel
truck, later bought out by Chrysler when they bought the Rootes Groupe
, Humber/Hillman/Sunbeam/Singer/Commer company of UK in the 60s. Known
as the Commer Knocker, the flat six had six pistons opposed in 3
cylinders, driving two shafts. The idea first came to UK from
Switzerland in the late 30s. TS3 is named after the engineers who
designed it ie, Tilling and Stevens.
The solenoid actuated/air operated valves have been  used in F1 race
cars for some years now. I believe this technology has been used in 2
stroke outboard motors to achieve a clean underwater exhaust.

Here is a photo of a 100 hp twin cyl/4 piston diesel two stroke in
production in UK, called the Dieselair D100. It has the RH cover
remover to show one crankshaft, the other side is similar. Note the
compressor to scavenge the cylinders, with a minor supercharging
effect. Direct injection is used, no valves, just ports.  The engine
weighs about 200lbs,  BSFC is about .45@75% power.Turbocharged models
are in development, with better SFC, i guess
See more at www.dair.co.uk


It is still a recip, not as smooth as the rotary!
  FWIW, Dave McC




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Its a diesel engine. Too heavy for aircraft use and they tend to 
destroy
propellers because of a sharp power pulse. The .37 BSFC is nice but a 
good
power to weight ratio is not among their strong points.  Been there and
done that since 1932 :) Never really caught on. Also the .37 BSFC tends
to be at about 50% power. At higher power levels the BSFC of a diesel
approaches that of a gasoline engine. From the looks of it
it is not exactly compact either.

BTW I just bought a Honda Odyssey. Great minivan.

-- 
Paul Lamar ...No rotor no motor.

The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Copyright 1998-2006 All world wide rights reserved.