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  #1  
Old 12-19-2020, 06:06 PM
pilot28906 pilot28906 is offline
 
Join Date: Apr 2006
Location: Murphy, NC
Posts: 557
Default Best Rate of Climb (Vy)

I soon will be doing the test card to determine Vy. Just wondering what others have gotten with a similar setup?

RV-7
IO-360-M1B (180 HP) Lycoming
2 Mags
Catto 66x76 3-blade prop

Thanks for any info.
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  #2  
Old 12-19-2020, 10:35 PM
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Tandem46 Tandem46 is offline
 
Join Date: Jan 2005
Location: CO
Posts: 652
Default

Around 95KIAS for me.
IO-360B1B CS Prop
But faster is better for me. Better cooling for the engine, better visibility for me, and lastly, more reaction time should the motor quit.
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  #3  
Old 12-20-2020, 11:05 AM
John Tierney John Tierney is offline
 
Join Date: Jan 2006
Location: Vonore, TN
Posts: 420
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Ditto for me, Vy 95, Vx ~85. I tested speeds from 75 to 110.
IO-360M2S 180 HP
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  #4  
Old 12-20-2020, 11:37 AM
pilot28906 pilot28906 is offline
 
Join Date: Apr 2006
Location: Murphy, NC
Posts: 557
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Thanks for the info. The test card in the test manual says to use speeds between 1.1 and 1.5 Vs which would be really low speeds. 95 sounds more reasonable for the RV's.
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  #5  
Old 12-20-2020, 11:43 AM
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rv8ch rv8ch is offline
 
Join Date: Feb 2005
Location: LSGY
Posts: 3,571
Default kitplanes article

Here's a good article on this.

https://www.kitplanes.com/using-leve...b-performance/

The curve is pretty flat, so somewhere between about 85 and 105 is going to be about the same.

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