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BigEd
PostPosted: Sat Feb 18, 2017 8:53 am 
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Location: England
Elsewhere Jim Horn said:
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That's why I chose FORTH as the development language for the 65F12 (6502 variant) used for the engine monitor system for the Voyager World Flight - I wanted a higher level language than raw assembly and wanted it to be self hosted so I could debug on the actual unit. In 1985 that left me with only one choice.


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On December 23, 1986, Voyager completed the first nonstop, non-refuelled flight around the world. Voyager, a unique aircraft constructed almost entirely of lightweight graphite-honeycomb composite materials...

- Smithsonian page on the Rutan Voyager

Quote:
General characteristics
    Crew: Two pilots
    Length: 29 ft 2 in (8.90 m)
    Wingspan: 110 ft 8 in (33.80 m)
    Empty weight: 2250 lb (1020.6 kg)
    Gross weight: 9694.5 lb (4397.4 kg)
    Powerplant: 1 × Teledyne Continental O-240, 130 hp (100 kW)
    1 × Teledyne Continental IOL-200, 110 hp (81 kW)
Performance
    Maximum speed: 122 mph (196 km/h)
    Range: 24,986 miles (42,212 km)
    Endurance: 216 hours

- Wikipedia
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scotws
PostPosted: Sat Feb 18, 2017 12:10 pm 
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Location: Just outside Berlin, Germany
Nice. Again, when you have to do the most with the least, use Forth.
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BigDumbDinosaur
PostPosted: Sat Feb 18, 2017 10:17 pm 
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Location: Midwestern USA
BigEd wrote:
Quote:
General characteristics
    Crew: Two pilots
    Length: 29 ft 2 in (8.90 m)
    Wingspan: 110 ft 8 in (33.80 m)
    Empty weight: 2250 lb (1020.6 kg)
    Gross weight: 9694.5 lb (4397.4 kg)
    Powerplant: 1 × Teledyne Continental O-240, 130 hp (100 kW)
    1 × Teledyne Continental IOL-200, 110 hp (81 kW)
Performance
    Maximum speed: 122 mph (196 km/h)
    Range: 24,986 miles (42,212 km)
    Endurance: 216 hours

Aside from the minimal computing resources that assisted in accomplishing this still-amazing feat, it's interesting to note that the plane easily maintained a relatively high average cruising speed (~116 MPH or 188 km/H) using little more horsepower than a Mini would at highway speeds. Most aircraft engines are operated at no more than 75 to 80 percent of maximum horsepower at cruise—that would be about 87-92 continuous horsepower in this case. Meanwhile, the plane was consuming fuel at an incredibly miserly rate. A lot of science and engineering went into that machine, and not just in the electronics.

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