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  #11  
Old 10-07-2021, 04:33 PM
blaplante blaplante is offline
 
Join Date: Jan 2010
Location: Southern California
Posts: 305
Default Per Van's - Performance

Have you seen https://www.vansaircraft.com/rv-4/#aircraft-details-2

According to the mothership, ceiling on a 160 HP RV-4 is 24,000 feet.
Or 3500' higher than the RV-6A and 2500' higher than the RV-6.
Given multiple of us that said we were happy with our 160 HP RV-6A/6, it's hard to see that you'd be unhappy with a 160HP RV-4.

Also note the fair degradation going down to a 150 HP. So when you say "o-320" note that all are not created equal!
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  #12  
Old 10-07-2021, 06:05 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 5,011
Default

Quote:
Originally Posted by Sparrowhwk View Post
....Fortunately I'm small enough to fit the RV-4 as is my partner....
Before you buy it, get her a back seat ride in it and let her make that decision. The ride should be more than once around the pattern, it should be a real flight.

Dave
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  #13  
Old 10-21-2021, 06:05 PM
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daddyman daddyman is offline
 
Join Date: Jan 2014
Location: Fredericksburg, Virginia
Posts: 326
Default Fine motor

Quote:
Originally Posted by Sparrowhwk View Post
I understand the recommendation of the 320 motor for lighter weight and that makes sense. But I have questions:
- How does a 320 equipped RV4 handle high density altitudes? (operations at DA of 7000' and up)
- Could a 320 cruise between 10500' - 15000' comfortably? (mountain flying)
- Are IO-320's available? Guessing this is a rare thing or only converted O-320's out there?
- Does the 320 play well with a CS prop, does that prop make a worthwhile difference, particularly for the higher elevation operations?
- Any other performance considerations or limitations with the 320 engines.

Thanks for any input and wisdom about the 320 versions.
I have a IO-320 and love it.
Flew into Durango, CO at 13,500 and it was fine.
I pulled up just to experiment on rate of climb: >2,000 Ft/min. WOW.
I stopped at FL 150

High altitude was not an issue.
Daddyman
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  #14  
Old 10-21-2021, 06:07 PM
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daddyman daddyman is offline
 
Join Date: Jan 2014
Location: Fredericksburg, Virginia
Posts: 326
Default CS Prop as well

Quote:
Originally Posted by daddyman View Post
I have a IO-320 and love it.
Flew into Durango, CO at 13,500 and it was fine.
I pulled up just to experiment on rate of climb: >2,000 Ft/min. WOW.
I stopped at FL 150

High altitude was not an issue.
Daddyman
I have a Hartzell CS prop. Huge difference over quoted fixed pitch prop.
Makes aerobatics so much better.
Increase in speed, takeoff performance and climb.
Daddyman
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