The Cessna 120-140 Association Forum

Hi everyone,

I fly a 1946 C140 in Germany, where landing fees are the norm, said fees being varying from airfield to airfield but generally are based on MTOW and noise levels. Sometimes, resident aircraft get to pay a bit less, although not at my home field.

As neither the 120 or 140 are listed in the FAA's AC 36-3H (Estimated airplane nosie levels), has anyone here by any chance ever found out/measured/guesstimated or otherwise come across noise levels for a a 120/140 in dB(A) ?
(Mine has a C85 with MacCauley prop)

Cheers; Thies

The 1946 models came with straight pipes and they are loud. Probably the best you can do is to put 150 mufflers on it, then I think you could justify using the noise levels for the 150, which I'd expect to be readily available. (55-59 dBA)

"The 1946 models came with straight pipes and they are loud." But not as loud as many motorcycles that cruise your and our streets and otherwise silent national parks.

Thanks, both Johns.

Valuable advice. And I am just happy when nobody pins the noise from motorcycles cruising their neighbourhood on me as I idle-in for a landing

Hi Thies
Eben habe ich deinen Beitrag, beziehungsweise deine Frage gesehen. Bist du in der Zwischenzeit fürnig geworden? Das würde mich noch interessieren...
Beste Grüsse
Nico

From google translate, take it with a grain of salt.

Hi Thies
I just saw your post or your question. Have you become affectionate in the meantime? I would still be interested in that...
Best regards
Nico