Ducted fan aircraft

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Malish

Well-Known Member
Joined
Oct 11, 2013
Messages
602
Location
Russia. City of Volgograd
Today we did weight our airplane with new retractable landing gear :

P2271843 (Large).jpg P2271847 (Large).jpg P2271844 (Large).jpg P2271845 (Large).jpg P2271846 (Large).jpg

Total weight was = 1129kg. But it's was about 50kg of fuel remaining on board, because fuel tanks located in center of CG, the EMPTY WEIGHT of aircraft was 1129kg - 50kg = 1079kg.
 

Scooper

Active Member
Joined
May 29, 2019
Messages
36
Location
Santa Rosa, CA
There is lots of great info here, especially about the project Malish describes.

I haven't waded through all 68 pages here, but wonder if the Czech UL-39 Albi project has been mentioned. It's a scaled down ducted fan 2-place EU Ultralight category replica of the L-39 Albatross, and first flew in 2016. The prototype is powered by a BMW S 1000RR motorcycle engine, and development is continuing. A detailed 13 page technical article describing the project's current status was published in Journal of Aerospace Engineering 2018, Vol. 232(14) 2721-2733. Sadly, it's behind a SAGE Publications paywall but available for download for US $40.

 
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henryk

Well-Known Member
Joined
Mar 8, 2010
Messages
6,191
Location
krakow,poland
There is lots of great info here, especially about the project Malish describes.

I haven't waded through all 68 pages here, but wonder if the Czech UL-39 Albi project has been mentioned. It's a scaled down ducted fan 2-place EU Ultralight category replica of the L-39 Albatross, and first flew in 2016. The prototype is powered by a BMW S 1000RR motorcycle engine, and development is continuing. A detailed 13 page technical article describing the project's current status was published in Journal of Aerospace Engineering 2018, Vol. 232(14) 2721-2733. Sadly, it's behind a SAGE Publications paywall but available for download for US $40.

-ALBI was flying in many modes=

https://www.dailymail.co.uk/news/article-3630371/Incredible-footage-shows-doomed-plane-gliding-ground-parachute-pilot-risked-life-staying-board-steer-away-populated-area.html

=on the paraschute...


=and from graas airfield.
 

PIK-21

Member
Joined
Apr 21, 2015
Messages
19
Location
Switzerland
I watched the L39 copy fly on a few occasions from Ceske Budejovice airfield in 2017 where it is hangered and i must say it wasnt impressive. Very lacking in power, had massive overheating problems and as i heard also had 2 maydays (7700) under its belt. So all in all i wil stick to the EV97.
 

rv6ejguy

Well-Known Member
Joined
Jun 26, 2012
Messages
4,515
Location
Calgary, Alberta, Canada
I watched many UL-39 vids and the TO and climb performance looked marginal. The fan/ engine noise, while cool, wouldn't make too many friendly neighbors and wears on you quickly. It was a great technical achievement and nice build but not sure how practical it would be.
 
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