- Koppen-Bollinger
Helioplane Original prototype soon re-named
Helio Courier.
Helioplane Four
unknown possible variant.
Helioplane Two
unknown possible...
- 2009-12-07.
Plane & Pilot, p 46. "Simplicity and Safety,
Features of the
Helioplane, a
Promising American Light Aircraft Prototype".
Flight International...
- 2020. "
Helioplane Really Safe".
Terre Haute Tribune-Star. 10 July 1949. p. 51.
Retrieved 25
January 2021. They call
their plane a
helioplane because...
-
Bollinger formed the
Helio Corporation of M****achusetts. They
developed a "
helioplane"
prototype for a cost of 6000
dollars that was
built based on a modified...
-
Smithsonian National Air and
Space Museum.
Retrieved 26
April 2017. "
Helioplane".
Smithsonian National Air and
SPace Museum.
Retrieved 3
February 2021...
- Morgantown, WV; 1992:
Helio Enterprises Inc) Koppen-Bollinger
Helioplane Helioplane Two
Helioplane Four
Helio Courier Helio Rat'ler
Helio Super courier Helio...
- Koppen, MIT, Cambridge, MA) Bollinger-Koppen
Helioplane 1 Bollinger-Koppen
Helioplane 2 Bollinger-Koppen
Helioplane 4 (Bolte
Aircraft Co, Des Moines, IA) Bolte...
-
biplane 1910
Jirotka Monoplane 1910
Joachimczyk Monoplane 1910
Jourdan Helioplane 1910
Kalep 1910
Karpeka 1
monoplane 1910
Kasyanenko 1 and 1bis biplane...
-
Whitworth Apollo April 14 – Aero Ae 50
April 14 –
Helio Courier (by its "
Helioplane No.1"
demonstrator in Canton, M****achusetts)
April 16 –
Lockheed YF-94...
