The 28 V (nominal) 29 Ah, FW28 portable GPU was developed for larger turbine aircraft and helicopters where portability requirements limit weight and size, but the need to maintain voltage above minimum FADEC limits during the start cycle is critical. This requirement demands that the GPU voltage is at the top of the FADEC upper limit before starter engagement.
When compared to a 24 V GPU of the same capacity, the FW28-START29 typically delivers a stunning 17% increase in performance (watts) for the same amperage. With an offcharge voltage of 30 V, the GPU delivers faster spool-ups, cooler starts and a faster, more positive systems response, which benefits turbine life and system reliability.
Many modern voltage-critical aircraft require the higher 'standing voltage' of the FW28-START29 to reduce the effect of heavy inrush currents during starting and the momentary voltage collapse below tight FADEC limits. The FW28 range enables the powering of many aircraft systems that previously could only be activated with the generator on line. The pre-flights and cycling of systems where aircraft are configured for rapid deployment with role equipment already on line, are examples where the higher FW28 voltage can prevent the appearance of undesirable / spurious EFIS messages on start-up.
The START29 has a built-in mini charger. Connecting any 110 / 220 V power cord into the GPU will automatically activate the integral 3-stage charger. A 3-colour LED indicates charging status and a solid-state digital voltmeter, with push-to-view button and timed auto shutdown, accurately displays voltage.
� Solid state digital voltmeter with push-to-view button and watchdog timer for cell protection.
� Internal self-contained mini charger with multi-color LED charge status display.
� Stainless steel sliding safety cover.
� Safe for air transportation.
� Operates in any position (inverted NOT recommended).
� Padded jacket for GPU / aircraft protection.
� Neoprene anti-shock / anti-slip feet.
� Can be ganged together to double output to create FW28-START58.
� 10 A accessory socket for work lamp/solder iron etc.
� 2 m mains input cord.
� 2 m heavy-duty double insulated output cable with rubber Nato plug.
� Lightweight or heavyweight trolley.
� 24 / 28 V work lamp.
� Rapid external charger : 10 , 30, 50, 80 A.
� 1000 A cast brass colour-coded and braided alligator clips with 2 m leads.