Technical Aspects of the 1934 International Touring Competition (Rundflug) Page: 19 of 34
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18 Ni.A.C.A. Technical Memorandum No. 760
have a figure
of the BFW Me
of merit of around 100,=with the exception
108, which shows k2 = 120 without, however,
value of the earlier type M 29 (1932).
TABLE I. Optimum k1 for Different Entries
in the 1934 Contest
0G/N vmax kl =
Type i c
ikg/I hp km/h 75 'f rca
BFWmIe 108 5.0 287.0 1435
Fi 97 5.0 243.0 1210
RWD 9 4.75 243.0 1160
Aero A 200 4.30 237.0 1025
PS 1 5.25 i 223.0 1170
Taken as a whole, the aerodynamic quality of this year's
types is below the average of last year's contest.
Next to high speed, the low speed in horizontal
flight is of decisive importance for the performance ap-
praisal. To simplify the landing conditions, the landing
speed shall be as low as possible. As a result, the ex-
cellence of an airplane is solely defined by the ratio of
its high to low speed (vmax/vmin), which should be as
high as possible.
The factors governing this ratio, aside from the aero-
dynamic performance coefficients, are T/cw and Camax,
represented in combination with figure of merit k3
*The speed range conforms to
3 ~ ---;--
Vmax k2 N/F
vmin / 2g 1 O
ry Cama x iF
The factor k3 obtained after dividing the different in-
fluential factors again defines the aerodynamic quality,
because it essentially contains /cw and camax*
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Schulz, R. & Pleines, W. Technical Aspects of the 1934 International Touring Competition (Rundflug), report, December 1934; (https://digital.library.unt.edu/ark:/67531/metadc63467/m1/19/: accessed May 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.