A little testy today, are we? Forget to take your meds?
Forgive my assumption that because you referred to Part 25 you also had
access to Part 23. Herewith the relevant sections:
"§ 23.63 Climb: general.
(a) Compliance with the requirements of §§ 23.65, 23.66, 23.67, 23.69, and
23.77 must be shown -
(1) Out of ground effect; and
(2) At speeds that are not less than those at which compliance with the
powerplant cooling requirements of §§ 23.1041 to 23.1047 has been
demonstrated; and
(3) Unless otherwise specified, with one engine inoperative, at a bank angle
not exceeding 5 degrees.
(b) For normal, utility, and acrobatic category reciprocating engine powered
airplanes of 6,000 pounds or less maximum weight, compliance must be shown
with § 23.65(a), § 23.67(a), where appropriate, and § 23.77(a) at maximum
takeoff or landing weight, as appropriate, in a standard atmosphere.
(c) For normal, utility, and acrobatic category reciprocating engine powered
airplanes of more than 6,000 pounds maximum weight, and turbine engine
powered airplanes in the normal, utility, and acrobatic category, compliance
must be shown at weights as a function of airport altitude and ambient
temperature, within the operational limits established for takeoff and
landing, respectively, with -
(1) Sections 23.65(b) and 23.67(b) (1) and (2), where appropriate, for
takeoff, and
(2) Section 23.67(b)(2), where appropriate, and § 23.77(b), for landing.
(d) For commuter category airplanes, compliance must be shown at weights as
a function of airport altitude and ambient temperature within the
operational limits established for takeoff and landing, respectively, with -
(1) Sections 23.67(c)(1), 23.67(c)(2), and 23.67(c)(3) for takeoff; and
(2) Sections 23.67(c)(3), 23.67(c)(4), and 23.77(c) for landing.
[Amdt. 23-50, 61 FR 5186, Feb. 9, 1996]
§ 23.65 Climb: All engines operating.
(a) Each normal, utility, and acrobatic category reciprocating engine
powered airplane of 6,000 pounds or less maximum weight must have a steady
climb gradient at sea level of at least 8.3 percent for landplanes or 6.7
percent for seaplanes and amphibians with -
(1) Not more than maximum continuous power on each engine;
(2) The landing gear retracted;
(3) The wing flaps in the takeoff position(s); and
(4) A climb speed not less than the greater of 1.1 VMC and 1.2 VS1 for
multiengine airplanes and not less than 1.2 VS1 for single engine airplanes.
(b) Each normal, utility, and acrobatic category reciprocating engine
powered airplane of more than 6,000 pounds maximum weight and turbine engine
powered airplanes in the normal, utility, and acrobatic category must have a
steady gradient of climb after takeoff of at least 4 percent with
(1) Take off power on each engine;
(2) The landing gear extended, except that if the landing gear can be
retracted in not more than seven seconds, the test may be conducted with the
gear retracted;
(3) The wing flaps in the takeoff position(s); and
(4) A climb speed as specified in § 23.65(a)(4)."
As noted by others, VFR/IFR does not enter into the discussion.
Bob Gardner
Post by SparseUp yours
Post by Bob GardnerIt's a Gardner time-honored tradition...answer first, then research.
23.65
Post by Bob Gardneris the appropriate reg, and there are prescribed climb gradients for
airplanes with one, two, three, or four engines. As Damon Runyan
wrote, you
Post by Bob Gardnercould look it up.
Bob
Post by SparseDoes anyone know of a VFR climb gradient. The only possible thing I
can
Post by Bob GardnerPost by Sparsecome up with is what Part 25 says an aircraft must be able to meet
concerning the takeoff path. From the start of takeoff to 1500 feet
or
Post by Bob GardnerPost by Sparsewhen transition from takeoff to enroute configuration is complete.
an
Post by Bob GardnerPost by Sparseaircraft must be able to climb at least at a 1.2% gradeitn. I ahev
heard of a gradeint of 1.6% for VFR but I acn find nothing about
it. I