US Army’s Silent Hawk Stealth Hybrid Electric Motorcycle

US Army’s Silent Hawk Stealth Hybrid Electric Motorcycle


US Army’s Silent Hawk Stealth Hybrid-Electric
Motorcycle. Logos Technologies announced today that the
company has been officially awarded a second Phase 2 Small Business Innovation Research
(SBIR) contract from the Defense Advanced Research Projects Agency (DARPA) to continue
work on the Silent Hawk hybrid-electric motorcycle, the US company announced on September.
SilentHawk is a collaboration between Logos Technologies, which makes military tools like
drones and sensors, and Alta Motors, which makes electric dirt bikes. Creating a silent
motorcycle meant starting from an electric bike. As designed, one modification of the
SilentHawk uses a hybrid engine, so it can run on gas most of the time, and on electricity
when it needs to be quiet. And it’s not limited to gas: It’s can run on diesel, as well as
JP5 and JP8 jet fuels, so that the special forces using it in the field can power it
with whatever fuel they might encounter. When running on fuel, the SilentHawk recharges
its own batteries and any electronic devices the troops might have, like radios, GPS receivers,
or tablets. SilentHawk is an all-wheel drive, hybrid-electric
motorcycle designed to transport troops over rough terrain and behind enemy lines with
minimal noise to reduce chances of detection. The system combines the all-electric RedShift
MX racing motorcycle, produced by Alta Motors, with a front-wheel drive system and multi-fuel
genset range extender developed by Logos Technologies. “In ‘silent’ mode, when the range-extension
genset is off, SilentHawk is about as loud as a normal office conversation,” said Dale
Turner, SilentHawk program manager. “When the rider is out of harm’s way, and the
range-extension system is engaged to charge the motorcycle’s propulsion battery and
to provide auxiliary power for equipment, it’s still only as loud a vacuum cleaner.”
SilentHawk weighs 350 pounds, has a range of 170 miles and can run on multiple fuels,
such as gasoline, JP-5, JP-8, Jet-A1, propane and AVGAS. Logos Technologies began initial
work on the motorcycle under a Phase 1 SBIR contract in February 2014. Ten months later,
the company was awarded Phase 2 funding, which led to the development of the current hybrid-electric
prototype. With the second Phase 2 award, Logos Technologies
is now set to produce two new SilentHawk prototypes: – An all-wheel drive model with user detachable
hybrid range-extender The purpose of two prototypes is to expedite
development of a field-ready system. Logos Technologies plans to use the model without
the range-extender to optimize the motorcycle’s front-wheel drive system. That system would
then be integrated with the modular range-extension system to create an operational prototype,
ready for field evaluation. “Our goal is an operational prototype with
a modular architecture, which would enable the user to configure it with or without the
range-extension system to meet specific mission requirements,” Turner said
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