REFLECTOR: Gliding Distance

[steve korney]

I think Brooke's  glide ratio is about right for all practical purposes...


Steve 

From: bwolf1 at tds.net
Date: Tue, 19 Jun 2012 16:02:27 -0400
To: reflector at tvbf.org
Subject: REFLECTOR: Gliding Distance

You are right Steve.  Thanks.  That would bring my glide ratio to just about 9.5:1.
Brooke


From: steve korney <s_korney at hotmail.com>
Subject: Re: REFLECTOR: Reflector Digest, Vol 87, Issue 104
Date: June 19, 2012 1:55:12 PM EDT
To: Reflector Reflector <reflector at tvbf.org>
Reply-To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>






Yes... 9.5 to 1...... Don't forget that the KIAS is about 12% less then your true airspeed at 6000ft... KTAS is about 95...


Steve 

From: bwolf1 at tds.net
Date: Tue, 19 Jun 2012 13:44:33 -0400
To: reflector at tvbf.org
Subject: Re: REFLECTOR: Reflector Digest, Vol 87, Issue 104

Steve….Just to be clear, do you mean 9.5 to 1, i.e., 9500 feet forward for every 1000 ft altitude loss?  It looks like mine is nearer 8.5 to 1.  Somehow, somewhere I got the idea it would be 15 to 1!  Maybe that is with a stopped prop.  
Brooke




From: steve korney <s_korney at hotmail.com>
Subject: Re: REFLECTOR: Gliding Distance
Date: June 19, 2012 1:13:22 PM EDT
To: Reflector Reflector <reflector at tvbf.org>
Reply-To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>






At 85 KIAS @ 6000ft , you have about a 9.5 glide ratio.... What are you expecting to see....?


Steve 

> From: bwolf1 at tds.net
> Date: Tue, 19 Jun 2012 12:26:23 -0400
> To: reflector at tvbf.org
> Subject: REFLECTOR: Gliding Distance
> 
> I am planning some overwater trips in the near future and the subject of gliding distance naturally comes to mind.  I have done some limited test flying with my airplane (XLRG w/Aerocomposite variable pitch prop).  The results of my gliding performance are not too good.  All tests were done around 6000ft with throttle at idle and wheels up.  Here are the results:
> 
> 80 KIAS - 900fpm…….. yields a glide performance of 1.38 miles/1000 ft altitude
> 85 KIAS - 1000fpm……..yeilds a glide performance of 1.41 miles/1000 ft altitude
> 100 KIAS - 1250fpm …..yields a glide performance of  1.34 miles/1000 ft altitude
> 
> As you can see, 85 KIAS appears to be the best glide speed.
> 
> I know there may be a big difference in what I tested and what happens in the real world with a windmilling or stopped prop.  Have any of you brave test pilots done any testing with a windmilling or stopped prop?  What were the results?  What kind of glide performance did others get with throttle at idle?  Is there anyway to correlate throttle idle glide performance with windmilling or prop stopped performance?  What is the best way to stretch a wheels up glide on a Velocity?
> 
> I would like to get a discussion going on this and find what others have experienced.  Thanks.
> 
> Brooke, N108BG, XLRG-5, 145 hours
> 
> 


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