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Props Approved for 415-C

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04 Dec 2025 14:37 #1 by Ronald Raty
Replied by Ronald Raty on topic Props Approved for 415-C
It looks to me like the Ercoupe is an approved application per FAA TCDS P‑918 for McCauley fixed‑pitch aluminum propellers which includes the 1A105 series. McCauley stopped manufacturing the older 1A90 series about 10 years ago. The 1A105 series application still has to meet the Ercoupe Type Certificate requirements.

Per type certificate A-718:
Static r.p.m. at maximum permissible throttle setting:
not over 2225, not under 2025. No additional tolerance permitted.
Diameter not over 71 in., not under 69.5 in.

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03 Dec 2025 17:21 #2 by Norrie Gregoire
Props Approved for 415-C was created by Norrie Gregoire
Is McCauley prop 1A105/SCM7146 approved for an Ercoupe 415-C, serial #2224, with a C85-F conversion?

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