Fieseler Storch featuring boundary layer control

I was reading "Aircraft in profile" Vol 11 at a local library. there is an article by Richard P. Bateson on the Storch, and there is a one paragraph description of a Fi-156 modified in 1940-41 by Ing. Woeckner of A.V.A. (is that some sort of Akaflieg?) in Goettingen. the aircraft was designated AF-2, it had an uprated AS 10H, 275-hp engine driving a blower in the fuselage that supplied air to a new set of wings devoid of tanks, gas supply being carried in an external tankunder thye fuselage. Most of the fuselage and empennage was stock. Apparently the lift coefficient went up from a very healthy 1.9 to a remarkable 3.8. Does anyone have pictures or specs?

Yes, I have data from captured WWII German document (NASM microfilms). Unfortunately, it is not accessible right now. However, my memory is it was fairly detailed with drawings and photos.

Artie Bob

Re: Fieseler Storch featuring boundary layer control (quick OT Storch question)

A question for Storch experts:
Has anyone read: 'Luftfahrt Bilder, Texte Dokumente: Handbuch 6' (Mittler [Germany], 1978) [hard-bound version of "Luftfahrt International," issues 16-18]. I read in a bibliography published on another forum that it has Fi 156P cockpit detail on pages 2443 & 2444.

Any discussion of the P or F variants would most appropriately be continued in the following thread (in order to keep things organised): http://www.secretprojects.co.uk/forum/index.php/topic,6666.0

As a side note, i think there are a couple of R.A.E. papers dealing with the modifications of an Auster with a similar apparatus. This happened after the war.

http://www.pprune.org/aviation-history-nostalgia/417799-marshall-ma-4-boundary-layer-aircraft.html

Prof.Gustav Lachmann, once of Gottingen, then of the alien internment camp on the Isle of Man, was sprung after direct appeal to Churchill and became guru in HP. His concept was to suck the boundary layer into the airfoil through the serrated leading edge/upper surface. MoS funded structural experiments as Napier/Luton-managed Lancaster (PA474, now the Memorial Flight), then Lincoln (lump mounted at the mid-upper turret), and Marshall M.A.4. David Budworth turbine sucked away. 1950s' schemes included a non-stop to Sydney Victoresque transport.

Bunged by bugs and by high cost of fabrication. General aerodynamic enhancements, then Big Power did the job.

A similar concept here :-

http://www.secretprojects.co.uk/forum/index.php/topic,10444.msg98181.html#msg98181


cheers,
Robin.

NACA translation of a war time German report on the AF-2

https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19910073056.pdf

Nice find, Thanks!

nice drawing and photo of the AF2 via DLR

drawing cleaned up and straightened a bit

sources:
http://www.dlr.de/100Jahre/desktopdefault.aspx/tabid-3299/5148_read-7459/
http://www.dlr.de/100Jahre/desktopdefault.aspx/tabid-3303/5152_read-7463/