The Scientific World Journal
Volume 2015 (2015), Article ID 419786, 2 pages
http://dx.doi.org/10.1155/2015/419786

Corrigendum

Corrigendum to “Fuel Cells: A Real Option for Unmanned Aerial Vehicles Propulsion”

Óscar González-Espasandín,¹ Teresa J. Leo,² and Emilio Navarro-Arévalo³

¹Instituto Nacional de Técnica Aeroespacial “Esteban Terradas” (INTA), Carretera Ajalvir km.4., Torrejón de Ardoz, 28850 Madrid, Spain
²Departamento de Sistemas Oceánicos y Navales, ETSI Navales, Universidad Politécnica de Madrid, Avenida Arco de la Victoria 4, 28040 Madrid, Spain
³Departamento de Motopropulsión y Termofluidodinámica, ETSI Aeronáuticos, Universidad Politécnica de Madrid, Plaza Cardenal Cisneros 3, 28040 Madrid, Spain

Received 26 March 2015; Accepted 16 April 2015

Copyright © 2015 Óscar González-Espasandín et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

In “Fuel Cells: A Real Option for Unmanned Aerial Vehicles Propulsion” some unclarities were detected in several figures shown in Table 2. To clarify the table, for the Horizon Energy Systems/AEROPAK, the weight (3.5 kg) has been replaced only by the FC weight (0.47 kg); therefore, the FC power density changes from 57.14 W/kg to 425.53 W/kg. Also, the FC power of PROTONEX/ProCore VI is changed from 800 W (peak power) to 280 W (output power), which implies FC power density of 686.27 W/kg.

We provide the updated Table 2.

Table 2: Examples of PEM fuel cells for UAV applications. Specifications from manufacturers’ websites and [].

Fuel type
Manufacturer/model
FC weight (kg)
FC power (W)
FC power density (W/kg)
Application/remarks

Chemical hydride cartridge
Horizon Energy Systems/AEROPAK
0.470
200
425.53
IAI Bird Eye 650 LE UAV 
10 A-21 V nominal 600 W with LiPo batteries; cartridge type I: 446 Wh/kg; type II: 607 Wh/kg Also used in Bluebird Boomerang Mini-UAV and Elbit Skylark UAV

Sodium borohydride
Protonex/UAV C-250
1.2
250
208.33
500 W peak power with batteries
Fuel 833 Wh/kg hydrated
Cartridge 1.8 kg, 1.5 l

Compressed H₂
Protonex/Spider Lion UAV (NRL)
1.77
95
53.67
Spider Lion Micro-UAV 2005, 3-hour flight

Compressed H₂
Protonex/Ion Tiger UAV (NRL)
1
550
550
Ion Tiger UAV; 550 W FC (1 kg + 3.6 kg tank 0.5 kg H₂), 26 h 1 m flight record in 2009
Powerplant total weight (including fuel and cooling) = 6 kg. Specific energy 1300 Wh/kg; 26 h endurance

Compressed H₂
EnergyOr/EO-310-XLE
3.95
310
78.48
Radiant Coral Technologies demonstrator UAV 1st flight February 25, 2013  
Hybrid; the weight includes auxiliary systems

Compressed H₂
EnergyOr/EO-210-XLE
3.65
250
68.49
The weight includes auxiliary systems

Compressed H₂
DLR/HyFish UAV
3
1000
333.33
HyFish UAV 2007, 0.5-hour flight

Compressed H₂
UTRC/Gen1
1.78
1200
674.16
Helicopter UAV (October 11, 2009) FC (675 W/kg) Powerplant (500 W/kg) Minicopter Maxi Joker; 20 m flight

Compressed H₂
BCS/BCS500
6.35
500
78.74
Georgia Tech University UAV 2006 Powerplant weight 12 kg

Compressed H₂
Horizon Energy Systems/H-100
1.36
100
73.53
Johannesburg University Piper Cub UAV

Sodium borohydride
Protonex/ProCore VI
0.408
280
686.27
AeroVironment Puma UAV 2008 Endurance 9 h

Compressed H₂
Horizon Fuel Cell Technologies
5
650
130
Pterosaur Micro-UAV 2008. Oklahoma State and California State Universities 15.5 h endurance; FC 480 Wh/kg

Liquid H₂
NASA/Sensor Technology/AeroVironment
—
—
—
AeroVironment Global Observer (GO-1); 65,000 ft alt., 7-day endurance; PL 180 kg