Editing NASA Pathfinder (section)

==Specifications==
[[File:Pathfinder Plus and Helios Prototype at Dryden.jpg|thumb|Pathfinder Plus (left) and Helios Prototype (right) on the Dryden ramp]]
[[File:Solar Aircraft Evolution through the ERAST Program.png|thumb|Solar Aircraft Evolution through the ERAST Program]]
{| class="wikitable" style="text-align:center;"
|+ Specifications<ref name=heliosfact/><ref name=pathfinderfactold2/><ref name=mishapreport>[http://www.nasa.gov/pdf/64317main_helios.pdf Investigation of the Helios Prototype Aircraft Mishap] – Volume 1, T.E. Noll et al., January 2004</ref><ref name=centurionfactold2>[https://web.archive.org/web/20030628143415/http://www.dfrc.nasa.gov/Newsroom/FactSheets/FS-056-DFRC.html NASA Centurion Fact Sheet archived at archive.org]</ref><ref>[http://www.dfrc.nasa.gov/Gallery/Photo/Helios/HTML/EC99-45140-11.html NASA.gov]</ref>
! &nbsp; !! Pathfinder !! Pathfinder-Plus !! Centurion !! Helios HP01 !! Helios HP03
|-
| Length ft(m) || 12 (3.6) || 12 (3.6) || 12 (3.6) || 12 (3.6) || 16.5 (5.0)
|-
| Chord ft(m) || colspan="5" | 8 (2.4)
|-
| Wingspan ft(m) || 98.4 (29.5) || 121 (36.3) || 206 (61.8) || colspan="2" | 247 (75.3)
|-
| Aspect ratio || 12 to 1 || 15 to 1 || 26 to 1 || colspan="2" | 30.9 to 1
|-
| Glide ratio || 18 to 1 || 21 to 1 || ? || ? || ?
|-
| Airspeed kts(km/h) || || || 15–18 (27–33) || 16.5–23.5 (30.6–43.5) || ?
|-
| Max altitude ft(m) || 71,530 (21,802) || 80,201 (24,445) || n/a || 96,863 (29,523) || 65,000 (19,812)
|-
| Empty Wt lb(kg) || ? || ? || ? || 1,322 (600) || ? 
|-
| Max. weight lb(kg) || 560 (252) || 700 (315) || ±1,900 (±862) || 2,048 (929) || 2,320 (1,052)
|-
| Payload lb(kg) || 100 (45) || 150 (67,5) || 100–600 (45–270) || 726 (329) || ?
|-
| Engines || colspan="5" | electric, 2&nbsp;hp (1.5&nbsp;kW) each
|-
| No. of engines || 6 || 8 || 14 || 14 || 10
|-
| Solar pwr output (kW) || 7.5 || 12.5 || 31 || 35 || 18.5
|-
| Supplemental power || batteries || batteries || batteries || Li batteries || Li batteries, fuel cell
|}