Let L-13 Blanik Glider,Motor-Glider Aircraft and Projects

[hesham]

Hi,


of course we know the Czech Let L-13 Blanik glider and motor glider aircraft,here is some of
its variants included a project,also the Twin-Blanik project,I know there is anther Twin-Blanik
aircraft was built,but it differs from this one.


Flieger Revue 5/1979

 

[walter]

Thank you Hesham, nice stuff
Attached a photo of the Lak-6 and a sketch. Does anyone know what engine was used in the Lak-6 and are the small bulges on the fuselage sides air intakes or maybe small radiators for engine cooling?

 

[walter]

Another variation on the motorised L-13 was the XL-113. Maybe only built as prototype, but noticed at least 3 registrations as OK-89902, OK-9121 and OK-UXA.
The XL-113 was intended as a light ag-plane and had a tricycle u/c. First flight mid-1980s and seems initial engine was a 65hp Walter Mikron 4-III. Also tested with Tatra AT-714 and around 2000 with a 80hp Rotax 912. By that time the hopper/chemical tank had been removed.

 

[hesham]

Beautiful pictures,thank you Walter.

 

[Stargazer]

Very graceful machines, these motorized variants are a nice discovery for me.

 

[hesham]

Also from Aerosvet 09,


the Let L-13,please note the different positions of rear wing.

 

[Stargazer]

the Let L-13,please note the different positions of rear wing.

You mean the horizontal stabilizers... :

 

[hesham]

From L+K 19/1978,

here is the same drawings,with some additions and more Projects,such as LS-131 & VSB.67M.

 

[hesham]

From L+K 2/1981,

there is two drawings to early L-13.

 

[hesham]

From L+K 12/1986.

 

[ermeio]

Today i run into this picture of the ES-2M ekranoplan, based on the Blanik Glider.
Any additional information? I did not find anything else not even on the photo.

 

[fortrena]

The following might perhaps be of interest.

That’s me on the left, or, How would you feel about a few words on the flying Cadillac of Czechoslovakia, the Let L-13 Blaník glider? | The Channel

With your permission, my reading friend, I would like to begin our expedition to the wonderful wo

ingeniumcanada.org

 

[Hood]

Today i run into this picture of the ES-2M ekranoplan, based on the Blanik Glider.
Any additional information? I did not find anything else not even on the photo.

According to Yefim Gordon's Russia's Ekranoplans (1st Ed.), it was developed in 1975 by the Moscow Higher Technical College's (MVTU) SKB from the ES-2 of 1974 (another Blanik conversion) but differed in having a detachable boat hull (but retaining the monowheel for beaching etc.), fuselage and tail strengthening and a revised flight control system. Like the ES-2 it had a 32hp M-63 motorcycle engine. Its not clear from Gordon's if the wings were standard or modified, but they were different from the ES-2's wings and the ES-2M proved more stable in flight.
It won a Gold medal at the 1976 Exhibition of Scientific & Technical Achievements of Young Enthusiasts. Subsequent history is not detailed.
The photo in the book is the same as the one you attached.

 

[ermeio]

Here is another bit of information, excerpt from a report: it seems the wing is from Grunin:
https://apps.dtic.mil/dtic/tr/fulltext/u2/a018738.pdf

 

[Grey Havoc]

So the Shmel was the proof of concept aerodynamic testbed for the ES-2M, albeit a non-amphibious one?