SKY-TEC, a HARTZELL ENGINE TECHNOLOGIES brand, includes starters and support for Prestolite, Electrosystems, Lamar and Kelly designs. SKY-TEC OEM contactors are today installed in many general aviation aircraft while SKY-TEC FAA-PMA contractors can be used for starter, battery master/auxiliary or auxiliary power applications in replacement of OEM parts.
SKY-TEC STS-S Series FAA-PMA certified aircraft starter solenoids (aka relays) are intermittent duty suitable for starter applications. They are available in 12V (STS-S12) or 24V (STS-S24) versions. Activation: +V to S-Terminal (Frame is grounded by mounting).
SKY-TEC STS-M Series FAA-PMA approved Battery/Master solenoids are continuous duty solenoids intended for use in battery master/auxiliary applications in certified aircraft. They are available in 12V (STS-M12) or 24V (STS-M24) versions. Activation: -(Ground) to S-Terminal. (Floating ground frame).
SKY-TEC STS-A Series FAA-PMA approved solenoids are continuous duty and typically used for connecting auxiliary (ground) power. They are available in 12V (STS-A12) or 24V (STS-A24) versions. Activation: varies.
All-metal case construction
Silver contacts (vs. copper) for high-current capability and long-life. They provide 300A in-rush capability. Much higher than the original units.
Strong spring and high-current coil for quick contact opening - minimizing arcing
Single coil terminal (other end connected to case)
High quality manufacturing
Upgraded to perform best with today's lightweight, high torque starters
Same OE terminal layout simple to install
For additional information on different SKY-TEC series of slenoids and their applications in different aircraft please refer to the respective product presentations.