Dec 15, 2016 · The British-designed Avro RJ85 is a short-haul airplane with four jet engines. What is the purpose of four engines for such a small aircraft?

Jun 19, 2017 · The main difference between the Avro RJ and the BAe-146 is the engine- The RJ has Honeywell LF 507-1F, which is developed from the Lycoming ALF 502R-5 used in 146.

Apr 25, 2017 · 1 Belly-mounted air brakes on the L-39 help the pilot configure the plane for landing. Half-flaps + air brakes require the same trim/power as full-flaps and landing gear down (hence the under positioning).

Apr 8, 2018 · The BAe-146 is a small aircraft that can seat approximately 80 passengers, but it has four engines. Does having four engines instead of two affect the way it performs or is it more efficient or less

Dec 9, 2016 · It's hard to give an exact figure as their are a number of considerations. If we assume that the re-fueling stop is at El Dorado, and the airplane was a BA146 (RJ85 is a variant) then approximate costs might be (in USD): Landing fee: at about \$6 per thousand kg, and 42,000 kg would be about \$250.

Edit: Seems I sort of mixed up the numbers. The A330 should be somewhere over 20 (quite a time since I worked on that...). Fopr the RJ85 on this forum the glide ratio is estimated as 15:1. P.S.: Keep in mind that all these values are maximum values that can be reached under optimal conditions. Real values may be lower.

Nov 27, 2021 · With a swept wing design, a "yaw" (nose moving left or right) can "couple" or cause a rolling motion. A huge aircraft like that KC-135 tanker, rolled on it's side, no longer has the wings supporting it against gravity.

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Mar 20, 2017 · Primary reason is speed control. The thrust output of a jet engine does not have a linear relationship to the gas core or fan speed and the most effective thrust range is somewhere between 75-100% N1.

Oct 18, 2023 · Maintenance cost is part man-hours, part hardware replacement. The first part depends on who's doing the maintenance, the second on how much flight hours the helicopter gets per year, since parts have both flight hour based and year-based replacement requirements.