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C90 prop combination

  • Keith Surowiec
07 Dec 2019 14:25 #7 by Keith Surowiec

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  • Gale York
07 Dec 2019 10:14 #8 by Gale York
Replied by Gale York on topic C90 prop combination
Some where I saw a chart with all the models/engine combos/prop choices, and can't locate it again. I am looking at a D with a 0-200, and
had noticed that the 0200 has a shorter prop (69") than others and higher RPM's. Anyone know where that chart is? I would like to better
know the sizesRPM's for the 0-200 in the, climb; cruise selection. Thanks

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  • Henry Pasquet
28 Oct 2019 08:26 - 28 Oct 2019 12:48 #9 by Henry Pasquet
Replied by Henry Pasquet on topic C90 prop combination
Mechanical tachs are not accurate. Buy or borrow an optical tach to get true RPM. I do not think it is over revving . Do not change your prop until you know your actual RPM. Check your airspeed indicator with a GPS. The are often inaccurate also.
Henry
Last edit: 28 Oct 2019 12:48 by Henry Pasquet.

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  • Keith Surowiec
27 Oct 2019 17:23 #10 by Keith Surowiec
Replied by Keith Surowiec on topic C90 prop combination
I've got a 71/48 on mine but constantly get into an over-rev situation for cruise which for me seems a bit slow at 93MPH at 2350. Wondering what you are seeing for performance during climb and cruise and what you decided to do. I have an opportunity to re-pitch here in Poland during the winter.
Cheers
Keith

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More
10 Jul 2019 20:40 #11 by Matt Gunsch
Replied by Matt Gunsch on topic C90 prop combination
mine has a McCauley 71/48, just was wondering what others were running.

A&P, IA, PPSEL
too many years GA and Warbird Maint
Check out the Ercoupe Discussion group on facebook

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  • Henry Pasquet
10 Jul 2019 13:07 #12 by Henry Pasquet
Replied by Henry Pasquet on topic C90 prop combination
The 7153 is a 1A105/SCM. The 1B90CM or CF should be a 7148 for best performance.

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