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Time Line - 1969: Ultralight Glider... |
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Artists rendition of the Captive
Column Ultralight Glider, drafted in 1969. (39k) |
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The wing ribs that were to be
used in the glider. The large square hole toward the top of each rib is where the Captive
Column wing spar would have gone. (39k) |
This Captive Column Ultralight Glider was envisioned by Mr. Bosch
in 1969 -- long before the ultralight aircraft market took shape. As the above photo
shows, construction was actually under way. The wing ribs were finished and the wing spars
were under construction when Mr. Bosch had to abandon the project due to lack of funds.
This design called for the wing spars and the fuselage to be made out of Captive Columns.
Here are the original specifications:
| Wing Span: |
20 feet total |
| Length: |
7.5 feet total |
| Empty Weight: |
50 pounds total (estimate) |
| Aspect Ratio: |
5.7 |
| Stall: |
30 mph (estimate) |
| Take-off: |
35 mph (estimate) |
| Cruise: |
37 mph (estimate) |
| Maximum Speed: |
90 mph (estimate) |
| Wing Airfoil: |
15% reflex with constant chord |
| Wing Chord: |
3.5 feet |
| Wing Area: |
70 square feet |
| Wing Loading: |
3.6 pounds per square foot (with 200 pound load) |
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