eXmajor-ME
Любитель Малой Авиации
- Откуда
- Middle East ㉿ Central Asia
...с каждым новым видом!
...ощущаю всё большую гордость за РУССКУЮ УТКУ!
/me
...ощущаю всё большую гордость за РУССКУЮ УТКУ!
/me
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Rust сказал(а):Дмитрий подскажи я наверное не так понял!?!!
3. What are the implications for other modifications that people have contemplated for canard aircraft, such as Blended Winglets, Symmetric Winglets, or Winglet incidence changes, all with an eye to reducing drag and increasing speed?
Blended Winglets - A small but growing number of people either have or are in the process of implementing blended winglets on E-racers, Long-EZ's, and COZY's. I have assisted with a couple of these, notably Jack Morrison's now defunct E-Racer and Chris Esselstyn's COZY, which are the only two canard aircraft with large radius blended winglets that have flown that I know about. In both cases, the structural design was such that the full strength of the wing was carried into the winglet, making no assumptions about the aerodynamic forces only being extant in the inward direction, as the plans design does.
What this failure does indicate clearly is the extreme importance of the internal structure of the wing/winglet joint in maintaining both structural and aerodynamic integrity of the aircraft. The aerodynamics and the structure are intimately tied together, and one cannot be changed without affecting the other. A blended winglet has a substantially different internal shape and structure than the plans form of the joint, and modification of this structure to permit a blended winglet should not be attempted without a deep understanding of all the forces and aerodynamics of the aircraft.
As discussed on the canard-aviators list and at least one web forum, there is at least one person fabricating blended winglets on a COZY MKIV that has not, at least to the extent that he's made public, performed the necessary engineering, design, or analysis of the structure and has left out any internal joint structure. Since this will not be obvious to anyone after the structure is complete, I recommend that no-one fly in this plane unless or until a full static load test of the wing/winglet joint to proof load level has been performed.
Symmetric Winglets - The thought of using symmetric winglets, rather than the standard Eppler 1230-modified airfoil, for drag reduction reasons has been suggested, and Chris Esselstyn fabricated his winglets with an Eppler 1230-M at the root and a symmetric NACA airfoil at the tip. This will reduce the inward force of the winglet, at least in theory, and at least in theory reduce the induced drag.
However, as we can see, unless the structure of the winglet is modified to account for both inward and outward forces with a symmetric winglet, the plans structure will be wholly inadequate to deal with the aerodynamic differences, whether or not there is an induced drag decrease. The ability of the winglet to produce outward force substantially changes the requirements for the internal joint structure.
Winglet Incidence Changes - The same argument as for "symmetric winglets" applies to the idea of changing the winglet incidence angle to reduce the force produced and subsequent induced drag.
ВАУ!
какихже размеров весь самолёт будет?
Это действительно самолёт нового=большего класса
чем мой!
Недождусь увидить его в одном....целом виде!
И мне кажется что Лайк-540 высокой компрессии
10:1 будет маловат для него!
jann сказал(а):Скажите какие приборы будут на такой небольшой доске у второго пилота?!
@ Admin aka Velocity
Дима сори за ОФФ топ а почему распиляли крыло ? Оно теперь только в утиль ?
Я давно все смотрю смотрю !Да видно что сходство с кокпитом миг 29 есть !Но одно меня все время смущает !Миг когда летит у него нос смотрит вперед !А в Интрудере мне кажется он смотрит вниз!Я не говорил ничего так как незнаю как он в продольном чертеже и как у него несущая поверхность относительно корпуса (фюзеляжа)но в последних фото вижу что относительно ПГО у него нос смотрит вниз!Получается он будет верхней часть носа лететь вперед!Дмитрий подскажи я наверное не так понял!?!!