Technical Aspects of the 1934 International Touring Competition (Rundflug) Page: 12 of 34
This report is part of the collection entitled: National Advisory Committee for Aeronautics Collection and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
N.A.C.A. Technical Memorandum No. 760
The second group of airplanes comprises airplanes em-
bo!dying new features or at least auxiliary means not pre-
viously tried out on -such .a large scale. To these belong
in particular, the German types BFW Me 108 and the Fiese-
ler Fi 97. Unfortunately, the lack of time made it impos-
sible to subject these airplanes to exhaustive tests be-
fore the race, so that the performances obtained. in the
contest are not directly comparable with those of other
types (RWD 9 and PZL 26), which had months to try them
The Me 108 and Fi 97 also have wing slots but special-
ly designed trailing-edge flaps. They are so designed
that when the flap is deflected the camber, as well as the
wing area, is increased chordwiso. Thus the flap - formed
as special auxiliary wing - rolls out and down. This meth-
od appears particularly promising because then the wing
area is small conformable to the conditions at high speed,
but substantially greater at low speed, take-off, and
landing. On the other hand, it must not be forgotten that
this method presents considerably more difficult problems
for the designer than is generally assumed. The structur-
al aspect itself of the movable parts, the stresses acting
upon them, especially when coupled with a slotted wing,
present exceedingly involved problems. It is therefore a
pleasure to be able to state that fundamentally all prob-
lems have been solved even if there is room for further
Klemm K1 36.- The aerodynamic aspect of the wing (fig.
2c) is the same as that of the tried and proved Heinkel He
64, used in the preceding international circuit competi-
tion. The full-span slotted wing (Handley Page-Lachmann
type) is divided; the outer part (wing-tip slot) is cou-
pled to the aileron so that by automatic opening, the ai-
leron assumes a new downward neutral setting. The inner
slot is coupled to work with the trailing-edge flap in such
a way that upon opening the flap is-set downward. Both
can be locked in neutral, open, or down setting.
The wing flap extends as far as the aileron and forms
with (350 maximum downward) setting a slot. The lateral
control is by conventional ailerons. The race has shown
this combination of slot and flap to be aerodynamically
very satisfactory, which likewise is in accordance with
the practical experience gained onatherairplane types.
Here’s what’s next.
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Schulz, R. & Pleines, W. Technical Aspects of the 1934 International Touring Competition (Rundflug), report, December 1934; (https://digital.library.unt.edu/ark:/67531/metadc63467/m1/12/: accessed May 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.