If these fillets are not practical, a leading edge pie section or ... The leading edge type of filleting should be avoided on low wing ... cient (see NASA TR 482).
should provide an increase in the maximum lift coefficient (see NASA TR 482). One area that needs fairing and is seldom treated properly is a wing-strut juncture area. This is especially
important on a compression strut braced low wing because the influence of the strut over the wing can trigger a stall in the area under the struts. You can make a study of the solution to this type of problem by comparing an early Cessna 188 (Agwagon) strut fairing to the fairing used on current production airplanes. The basics of proper fairing of this area are shown in Figure 5. This type fairing should be the best arrangement for a high wing airplane, and the fairing is easier to develop. This type of fairing was used on the high wing Howard DGA series airplanes.
Article III BREAKS AND FILLETS
By Al Backstrom (EAA 1162) Rt. 1 Frisco, Texas 75034
FIGURE 1
A Well-Faired and Filleted Flying Machine
-L HE LINES OF a flying machine should be smoothly' faired with no sharp breaks or junctures. Figure 1 shows a near ultimate approach to proper fairing of lines and fillets. Our airplane design problems are different than those of our friend the bird and so they must have a different solution. Figure 2 is a tuft study on a really bad example of fairing lines and lack of fillets. Figure 3 shows the solution to these problems. Most airplanes do not have problems that are this bad, but I do not believe that any abrupt juncture has been designed that would not be improved with a good fillet. Figure 4 shows the basic ingredients of typical, good
fillets. If these fillets are not practical, a leading edge pie section or filleting may be used to reduce intersection drag. The leading edge type of filleting should be avoided on low wing designs since the fillets as shown in Figure 4
12 JANUARY 1975
An example of the importance of smooth flowing external lines is shown in Figure 6. This example is especially interesting, since a reduction in drag was achieved in spite of increased frontal and wetted areas. It is fortunate for those of us who like simple structures that sharp external breaks parallel to the airflow direction are not so critical. If they were, we would never get a rectangular fuselage airplane to fly. I hope that from the words and pictures in these articles that you have been able to appreciate the importance of detail design features in achieving better airplane performance. As you look at your airplane, walk down a flight line, work at the drawing board, or work on your airplane, look for details that you can change to improve performance. FIGURE 2
Wing/Pod Intersection Flow in the Original Configuration of the Backstrom EPB-1 Flying Plank Glider.
FIGURES
Wing/Pod Intersection Flow on the Modified Configuration of the Backstrom EPB-1. Note the Tufts Stuck on the canopy due to a Static Charge of the Nylon Fiber-glass.
R = .05c - .08c For FWD 25 - 30% C
Max R = .10 To .20c Top View A. Low Wing Type
Strut Chord Minimum
Front View
Side View
FIGURES Fairing For Strut Braced Low Wings
B. Airfoil To Flat Plate (Dimensions Same As A. Above)
R. = .05c - .08c
Const C. High Wing
Upper Fuselage Lines
FIGURE 4 Typical Good Fillet Design FIGURES
Canopy installation on a Vought F4U. A well rounded canopy was installed to eliminate the sharp peak of the original canopy. Although the modified canopy was larger in order to afford the pilot greater visibility, the canopy drag coefficient was decreased by 0.0004 and a 2 mph speed increase was realized. From National Advisory Committee for Aeronautics Report WRL-108.
One point that should be made is to not look at top speed as the only ... The exhaust system uses a ... Do not use a household oven for heating Plexiglas to.
by better detail design of the engine installation. The more technical minded reader can review NASA War- time Report WRL-108 that was used as a basis for ...
Figure 2 shows a cowl designed by Jim Swick for. Lycoming engines with no extension shaft. The forward shape of this cowling and that shown in Figure 1 are.
Jul 27, 2005 - you were married by a justice of the peace, you will probably (9 out of 10 chances) get .... were making had to with the kind of day on which this man was ... God's essence or nature is love, or that he has the quality of love.
Jul 27, 2005 - Validity of the Rule Within the New Testament 273. ⨠a. In General 273. ⨠..... However, in other Hellenistic literature, this usage is established.
1 juin 2017 - le siège social est situé 42, rue de Châteaudun 75314 Paris Cedex 09 agissant poursuite et diligences de ses représentants légaux, domiciliés en cette qualité audit siège, organise une opération gratuite et sans ... le participant doit
La société Hachette Livre, département Hachette Jeunesse collections Disney, société anonyme au capital de 6.260.976 euros, dont le siège social est 58 rue Jean Bleuzen, CS 70007,. 92178 VANVES, inscrite au RCS Nanterre sous le numéro. 602 060 147 or
Better Stories, Not Better Constructs, to Generate Better Theory: A Rejoinder... Dyer, W. Gibb, Jr.; Wilkins, Alan L.; Eisenhardt, Kathleen M. Academy of ...
two functions is that, in the case of learning, the dynamics is internal to the .... throughout the first two years of human life (Yando, Seitz & Zigler, 1978) if there is ... follows a âteacherâ (another robot) using a simple sensory-motor rule
(Slap hand on knee when you hitch). 3&4. Cross Right behind Left, Step Left to Left side, Cross Right over Left. 5&6& Dig Left heel to the Left diagonal, Hitch Left ...
Jan 8, 1993 - Slip Transition of a Polymer Melt under Shear Stress. K. B. Migler, (a) ... These results are compared to a theoretical model re- cently proposed ...
can be identified in ES cells and be used to directly induce .... (E) Quantitative PCR analysis of pMX retroviral transcription in (1) wild-type MEFs, (2) wild-type ES cells, ...... sham) and Bioprime kit reagents (Invitrogen) from an Xist cDNA tem-.
Jan 8, 2011 - With donkey cart on road, or camels or jalopies from soviet era which transport people from elsewhere to nowhere. From my point of view cities ...
5,16 As the surface tension of PDMS is y=21 ... with an accuracy better than 5%, and measurements on ... M 1.6x109, 1-1.8*10* cm, plusses; silanated wafer,.
Frame 12: A subsequent query for service discovery, with known answers....65 ..... use multicast DNS, it just has to blindly send its queries to the multicast ...
and Cryptosporidium spp. in one reaction using species-specific probes. This assay ... mortality in children in the developing world.1 Many studies have been ..... it from Entamoeba dispar (Brumpt 1925). ... Lieshout LV, Polderman AM, 2003.
1 janv. 2007 - ... 23 et, au plus tard, le 1er janvier 2007. Article 26. Le Premier ministre, le garde des sceaux, ministre de la justice, et le ministre de l'outre-mer sont responsables, chacun en ce qui le concerne, de l'application de la présente
Maybe you got some time to share. But you don't know me. You just look at me ... We all have to fight, day after day. For a better life. Well you'll see me standing ...
that can be said about the teachings of Buddha is that they are the teachings of a human ... learn how to control it, they cannot think of any peace in the world, even if they have ... they like, but when it comes to social behaviour, with everybody