40 C.F.R. § 1031.90

Current through November 30, 2024

Section 1031.90 - Supersonic engines

The following standards apply to new engines installed in supersonic airplanes:

(a)Smoke. Engines of a type or model for which the date of manufacture was on or after January 1, 1984, may not have a characteristic level for smoke number exceeding an emission standard that is the lesser of 50 or the following:

SN = 83.6·rO^-0.274

(b) [Reserved]

(c)HC. Engines of a type or model for which the date of manufacture was on or after January 1, 1984, may not have a characteristic level for HC exceeding the following emission standard in g/kN rated output:

HC = 140·0.92^rPR

(d)CO. Engines of a type or model for which the date of manufacture was on or after July 18, 2012, may not have a characteristic level for CO exceeding the following emission standard in g/kN rated output:

CO = 4550·rPR^-1.03

(e)NO_X Engines of a type or model for which the date of manufacture was on or after July 18, 2012, may not have a characteristic level for NO_X engines exceeding the following emission standard in g/kN rated output:

NO_X = 36+2.42·rPR

40 C.F.R. §1031.90

87 FR 72351 , 12/23/2022