PPRuNe Forums - View Single Post - F-35 Cancelled, then what ?
View Single Post
Old 4th Nov 2014, 20:03
  #5343 (permalink)  
Join Date: Jul 2008
Location: Australia OZ
Age: 71
Posts: 1,938
Noise Clarification from AFA Magazine

On previous page there is a noisy story: http://www.pprune.org/military-aviat...ml#post8724438

Clarification on F-35 Noise 04 Nov 2014 AFA Mag'n
"F-35 Program Executive Officer Lt. Gen. Christopher Bogdan said an engine with the same decibel level of noise as another may be perceived as louder if the character of the noise has a higher or deeper pitched tone. During a press briefing on Oct. 30, Bogdan made an analogy to the F-4 Phantom (see F-35 Noise Good to Go). However, the F-35 engine noise study to which he referred did not compare the F-35’s sound to that of the F-4."
Air Force Magazine
ORIGINAL AFA story referenced above:

F-35 Noise “Good to Go” 31 Oct 2014 John A. Tirpak
"Studies of F-35 noise relative to legacy fighters will be released Friday, and will show that “on the ground, at full military power,” which is full power without afterburner, the F-35 is “actually quieter, by a little bit” than legacy aircraft such as the F-15, F/A-18, and F-16, F-35 Program Executive Officer Lt. Gen. Christopher Bogdan said Thursday. That means the F-35 is “good to go” for beddowns in the US, he said. This “real noise data” should dispel rumors that the F-35 will be much louder than its predecessors. Part of the reason is that the F-35 is “very sleek in its outer mold line, without a lot of drag,” Bogdan said. Using afterburner, however, the F-35 is considerably noisier than its predecessors, as it generates 43,000 pounds of thrust. Its noise will be on a par with the old F-4 Phantom, Bogdan reported. Although its character is different, the F-4 noise is deeper than that of the F-35, he said. The differences, however, may be hard to detect with the human ear, which cannot perceive differences of up to three decibels, he reported. The numbers were developed in 2013 and “validate” numbers developed in 2008 with an early, pre-production version of the F-35."

Last edited by SpazSinbad; 4th Nov 2014 at 20:07. Reason: adtxt
SpazSinbad is offline