By S. Pradeep

Airplane layout 1 (1998) 89—104

It is said in such a lot flight dynamics texts that the phugoid approximations offer terrible estimates whereas the quick interval approximations are actual. The survey during this paper unearths that there are at the very least 5 approximations to the phugoid. the level of departure of every of those from the precise price is set for a reasonably broad database representing quite a few airplane in several flight stipulations. it's came across that the majority of them are insufficient in predicting the phugoid features appropriately. still, approximations to the phugoid frequency that appear to have remained omitted are visible to be exemplary. nevertheless, no useful approximation exists for the phugoid damping. With this history, a clean approximation for the phugoid mode is positioned forth herein. it truly is derived through equating the coefficients of the made from the quick interval equation (which has been proven to be very exact) and the phugoid equation (as but unknown) to the coefficients of the fourth-order attribute polynomial. the recent approximation is proven to be actual.

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Artillery—had cost the lives of 10 crew members. Airdrops continued following this tragedy, although pilots took pains to insure that artillery units knew the location and time of airdrops. During June, the 314th Troop Carrier Group airdropped nearly 1,000 tons, with most of the supplies going to ROK units. This brought the total of airdropped cargo during the first six months of 1951 to 10,640 tons. C–46s were responsible for about 1,000 tons of this total, with C–119s delivering the remainder.

Richard W. Henderson of the 314th Troop Carrier Group, took off from Taegu at 0730, formed up, and headed for Munsan. All aircraft made accurate drops at 0900 as Henebry in his C–54 command ship looked on. The second serial of 26 C–46s, however, encountered trouble. The lead aircraft turned back with a runaway propeller, and the deputy commander missed the DZ by a half-mile. The other aircraft in the serial dropped on the lead, compounding the problem. The operation got back on track when 28 C–46s of the third serial, led by Colonel Nigro, an experienced airlifter, dropped squarely on target.

Combat Cargo Command had two weeks’ rest following the closure of Yonpo on December 17. The hiatus came to an end, however, when the Chinese launched a major offensive on December 31. As Eighth Army retreated southward, Tunner’s airmen again found themselves conducting emergency evacuations. Between January 1 and 5, 1951, Combat Cargo Command flew out 4,757 tons of cargo and 2,297 patients, mainly from the Seoul area before it fell to the enemy on January 4. Desperate for airlanded supplies, Eighth Army engineers carved out emergency airstrips near the front lines at Wonju and Chungju.

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