Не ви допада? Няма проблеми! Можете да върнете стоките до 30 дни
Няма да сбъркате с подаръчен ваучер. Получателят може да избере нещо от нашия асортимент с подаръчен ваучер.
До 30 дни за връщане на стоки
Making an aircraft silent involves many things. One sure solution is achieving a lower stall speed. If an aircraft can fly at very low speed and still ascend then lower noise is expected. A lower stall speed poses the challenge of an increased swept area and larger wings. A larger wing area means a higher expected flutter and vibration which could lead to catastrophic failure in flight. This work tends to widen the operational envelop involving all factors involved in achieving a lower stall speed.
Здравейте! Аз съм Libroamiko, вашият книжен съветник.
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