Abstract: An improved fuel air premix chamber for a gas turbine engine. An integral heat exchange structure is used to cools the premix chamber outer wall, preheating the compressor air supply as it passes into an inner central longitudinal premix tube and preheating also the fuel and F/A mixture for an improved mix, low emissions combustion and low differential combustor pressure. The F/A premix flow thru the central longitudinal tubes and yields an exiting spouting velocity into the primary combustion zone for swirl/circumferential flow combustion yielding flame stability.

Abstract: An integrated solenoid system including a single housing containing a solenoid, a controller and one or more electrical connections. The controller includes temperature compensating means and/or voltage compensating means thereby providing predetermined, substantially constant currents to said solenoid. The housing includes an integral two-part end cover.