Igo Etrich and the origins of bio-design... (with the exception of ornithopters

[nuuumannn]

Modesty should be the motto of the members of this forum.

This forum is about sharing accurate information. The presumption that Ader flew the Avion III is not accurate.

As such he had all time and access to dig the museum archives.
he also had budgets to perform test on a full size wing as well as on Avion n°III' steam engine and propeller (at Saclay's power-plant Test Center ).

Importance of position does not automatically guarantee accuracy of fact. All that does is prove the machine's wing is capable of creating lift, which is not in dispute. What is, is that Ader flew the Avion III in 1897 as he said he did. This proves that he might have been able to, but it doesn't prove whether or not he did.

I cannot force you to agree with me, so let's leave it at that and not overburden this interesting thread with this any longer.

 

[nuuumannn]

You should better directly contact the "Musée de l'Air et de l'Espace" at Paris Le Bourget.
The author, General Pierre Lissarague was the head of this institution between 1973 and 1986, (and I think he also hold the Lindberg Chair at the National Air & Space Museum at Washington DC. in 1985 & 1986).
As such he had all time and access to dig the museum archives he also had budgets to perform test on a full size wing as well as on Avion n°III' steam engine and propeller (at Saclay's power-plant Test Center).

It might be worth iterating at this point that the purpose of Lissarigue's trials of Ader's wing was not to prove that it actually flew, but to investigate how it reacted in natural airflow for the purpose of restoring the aircraft, with which he was tasked. Another aspect of the Avion III that Lissarigue carried out live trials of was its propellers, which were recreated using the exact same materials as the originals and these were spun up to the operating rpms of that which the novel steam engine would have driven them. After running for short periods at maximum rpm, the propeller blades flew apart. This unfortunate consequence was not foreseen by Ader, but it actually happened during the trials carried out at Sartory on 14 October 1897, as witnessed by General Joseph Henri Mensier in his report dated 21 October 1897, in which he stated that the aircraft did not leave the ground and after it slewed to a stop its propellers had disintegrated.

I have a copy of Icare, Revue del’Aviation Française No.134; Le Dossier Ader, which was written in part by Lissarigue and it is where I got this information from. I have posted an analysis of the Avion III based on Lissarigue's and others work that I have sought, for the purposes of an article, on this site for the interests of forum members.

 

[blackkite]

Hi! Swallow.
http://www.volaticum.com/american-magazine-of-aeronautics-volume-11-03-september-1912.htm

 

[blackkite]

Hi! Limousine.

Etrich Luft-Limousine / VII

https://www.kartonmodellshop.de/etr...912-1-24-deutsche-anleitung.html#&gid=1&pid=2

 

[riggerrob]

Hi! Swallow.
http://www.volaticum.com/american-magazine-of-aeronautics-volume-11-03-september-1912.htm

Pretty!
Ironically, the latest fashion (2020)in wings for racers and competition sailplanes is the Schumann configuration with a similar planform.

 

[robertino]

Stanko Bloudek also worked with him

https://www.modelarstvo.si/stanko-bloudek/

In the years 1911 - 1918 he was the first Slovenian professional aircraft designer in the aviation industry. He worked in Leipzig, Vienna, Budapest, Trutnov in the Czech Republic. He was then involved in the construction of the Etrich tube and the construction of the first aircraft with a fully enclosed cockpit.

 

[Richard N]

The Alsomitra Macrocarpa (aka the Zanonia Macrocarpa) seeds natural flying wings were the inspiration for Alexander Lippisch's and other German designers flying wings as well as the wing of the Taube.

View: https://youtu.be/jWTnAQtvgvQ


Seed aviation, Travelling, The Private Life of Plants BBC Two:

View: https://youtu.be/2rX--Y5gCnE


Build thread for the Zanonia Macrocarpa 1100mm 3D printed Flying Wing Glider: https://www.rc-network.de/threads/zanonia-macrocarpa-1100mm-3d-druckmodell-bionisches-design.808333/

View: https://youtu.be/5wRM4Psy-Us


NFROB 2020: Build thread here: http://www.rc-network.de/forum/showthread.php/773466-NOT-FOR-RES-ONLY-BOW

View: https://youtu.be/g_oHshMCu5g

 

[hesham]

From L+K 5/17/1994;

On the way to the "flying toy car", Igo Etrich first solved a non-motorized version - a glider. Down
wooden model Etrich E.VIII Taube Limousine from the end of the twenties (both models have been
preserved in the NTM collections)

 

[klem]

More in detail some interesting aspects: Heinrich Hertel-Structure Form and Movement.

 

[hesham]

More in detail some interesting aspects: Heinrich Hertel-Structure Form and Movement.

Dear Klem,

for Hertel,please see;

https://www.secretprojects.co.uk/threads/hertel-vtol-aircraft-projects.32506/#post-421189