REFLECTOR: Reflector Digest, Vol 87, Issue 104

[Grover McNair]

Seems like 15:1 was the number I remembered as well. 

Does any one know if there is much difference in glide ratio between the
fixed gear and retractable versions?

Grover McNair

 

  _____  

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Brooke Wolf
Sent: Tuesday, June 19, 2012 1:45 PM
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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