Why did they want us to maintain altitude
Zzuf would you please go into Vp and aquaplaning sounds very interesting...Although Vp is probably only for the Navy and may not exist in the FARs. The FARs may differ than in HHH's text with respect to definitions
Last edited by Pugilistic Animus; 10th Aug 2018 at 18:09.
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Vo (operating manoeuvring speed) was introduced at A/L 23-45 in 1993 ref FAR Part 23 Sec. 23.1507 effective as of 09/07/1993
AC 23-19A (https://www.faa.gov/documentLibrary/.../AC_23-19A.pdf) has this to say -
48. What is the design maneuvering speed VA ?
a. The design maneuvering speed is a value chosen by the applicant. It may not be less than Vs√n and need not be greater than Vc, but it could be greater if the applicant chose the higher value. The loads resulting from full control surface deflections at VA are used to design the empennage and ailerons in Part 23, §§ 23.423, 23.441, and 23.455.
b. VA should not be interpreted as a speed that would permit the pilot unrestricted flight-control movement without exceeding airplane structural limits, nor should it be interpreted as a gust penetration speed. Only if VA= Vs √n will the airplane stall in a nose-up pitching maneuver at, or near, limit load factor. For airplanes where VA>VS√n, the pilot would have to check the maneuver; otherwise the airplane would exceed the limit load factor.
c. Amendment 23-45 added the operating maneuvering speed, VO, in § 23.1507. VO is established not greater than VS√n, and it is a speed where the airplane will stall in a nose-up pitching maneuver before exceeding the airplane structural limits.
AC 23-19A (https://www.faa.gov/documentLibrary/.../AC_23-19A.pdf) has this to say -
48. What is the design maneuvering speed VA ?
a. The design maneuvering speed is a value chosen by the applicant. It may not be less than Vs√n and need not be greater than Vc, but it could be greater if the applicant chose the higher value. The loads resulting from full control surface deflections at VA are used to design the empennage and ailerons in Part 23, §§ 23.423, 23.441, and 23.455.
b. VA should not be interpreted as a speed that would permit the pilot unrestricted flight-control movement without exceeding airplane structural limits, nor should it be interpreted as a gust penetration speed. Only if VA= Vs √n will the airplane stall in a nose-up pitching maneuver at, or near, limit load factor. For airplanes where VA>VS√n, the pilot would have to check the maneuver; otherwise the airplane would exceed the limit load factor.
c. Amendment 23-45 added the operating maneuvering speed, VO, in § 23.1507. VO is established not greater than VS√n, and it is a speed where the airplane will stall in a nose-up pitching maneuver before exceeding the airplane structural limits.
Vp is listed in Hurt's text as " The maneuver speed". I don't have Aerodynamics for Naval Aviators before me at this time but the Formula Vp= Vsn^.5 is listed in his book.
Zzuf would you please go into Vp and aquaplaning sounds very interesting...Although Vp is probably only for the Navy and may not exist in the FARs. The FARs may differ than in HHH's text with respect to definitions
Zzuf would you please go into Vp and aquaplaning sounds very interesting...Although Vp is probably only for the Navy and may not exist in the FARs. The FARs may differ than in HHH's text with respect to definitions
The hydroplaning speed, VP, may be estimated by the equation VP= 9√푃, where VP is the ground speed in knots and P is the tire pressure in lb/in2.
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