Quote:
Originally Posted by sendler
Vetter is way beyond this for four years now. But no one has ever had a chance to get in a wind tunnel yet to test whether it is really necessary to use the full tail or if a Kamm will get most of the benefit.
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*The full tail IS a Kamm tail.It just happens to be the whole thing.
*The fuselage chart is from the wind tunnel and shows exactly what happens when you chop portions of the tail away.
*Arado Flugswerke has published results of truncated fuselage wind tunnel studies.
*Most known aeronautical companies studied fuselage and wing truncation though the 1920s up and through WW-II.
*Lay did this wind tunnel research with truncated car models in 1933.
*Breer actually did the very first 'Kamm' tail in 1934 on a DeSoto Airflow test mule.
*K-Fachsenfeld wind tunnel tested the K-tail in 1935 and received a patent for it.
*K-Fachsenfeld was brought into FKFS to do research under Kamm.They repeated Lay's truncation research and refined the K-tail
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From the results of what's already been published we may be able to make fairly high confidence performance predictions without additional studies.