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  #1  
Old 02-04-2018, 08:33 AM
JOEPILOT JOEPILOT is offline
 
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Default Glide ratio

Does anyone know the glide ratio for our planes?
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  #2  
Old 02-04-2018, 11:18 AM
AeroDog AeroDog is offline
 
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Default

Quote:
Originally Posted by JOEPILOT View Post
Does anyone know the glide ratio for our planes?
A while back I watched a EweTube video (they're a bunch of sheep, but that's another story) where someone on this forum did a long, dead-stick, prop-stopped glide to landing. The claim was made that a -12 can do 12:1. That seems optimistic, but may be true.

Jerre
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  #3  
Old 02-04-2018, 11:27 AM
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az_gila az_gila is offline
 
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It will vary depending on lots of obvious variables, however one data point is here for a RV-6A in a CAFE Foundation test -

11.39:1

https://www.yumpu.com/en/document/vi...afe-foundation
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  #4  
Old 02-04-2018, 12:18 PM
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JohnInReno JohnInReno is offline
 
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Location: Prescott Valley/Chandler AZ
Posts: 290
Default RV9A Cafe

The Cafe report for the RV9A shows 12 to 1 at 1738lbs and 95mph.

Edit: Idle power coarse pitch
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Last edited by JohnInReno : 02-04-2018 at 12:55 PM. Reason: Additional information
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  #5  
Old 02-04-2018, 12:47 PM
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rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
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Default Other airplanes for reference

12:1 sounds reasonable to me with the prop stopped; probably closer 10:1 if the prop is still spinning (due to the extra drag).

For reference, my Baron B58 with feathered props is 10.5:1 and the B747-200 is 15:1.
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- RV10, N1530G (reserved). Empennage in progress.
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  #6  
Old 02-05-2018, 08:50 AM
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scottmillhouse scottmillhouse is offline
 
Join Date: Apr 2007
Location: Madison, AL
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I recently had an engine fuel delivery problem. I shut down and stopped the prop and got over 3 minutes of glider time. I held 60 kts, and averaged 582 fpm descent by Dynon. Solo with full fuel. Do the math and it is 10.43 for my plane for those conditions. Only a final turn from a 45 for final. The Dynon pretty much had the glide distance nailed.
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  #7  
Old 02-05-2018, 10:40 PM
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donaziza donaziza is offline
 
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Location: Atlanta
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Default Anybody got numbers for an 8?

Anybody got numbers for an 8?
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  #8  
Old 02-05-2018, 11:54 PM
Bevan Bevan is offline
 
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Location: BC
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Do the test cards for YOUR plane then make a POH for YOUR airplane. You will learn a bunch. Iím surprised this isnít required to finalize the Phase 1 period.

Bevan.
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  #9  
Old 02-06-2018, 04:22 AM
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JohnInReno JohnInReno is offline
 
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Default RV8A

Quote:
Originally Posted by donaziza View Post
Anybody got numbers for an 8?
All of the Cafe Foundation reports are available here:

http://cafe.foundation/v2/research_aprs.php
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  #10  
Old 02-06-2018, 05:41 AM
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beechrv9a beechrv9a is offline
 
Join Date: Feb 2005
Location: Maryland
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Default Thanks!

Quote:
Originally Posted by JohnInReno View Post
All of the Cafe Foundation reports are available here:

http://cafe.foundation/v2/research_aprs.php
Thanks for Posting!
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