REFLECTOR: glide ratio

[Ron Brown]

I too have measured about 15:1 on my 173 RG, fixed pitch, engine idling, only one on board, half fuel and gear up.  

Ron   
  ----- Original Message ----- 
  From: Al Gietzen 
  To: 'Velocity Aircraft Owners and Builders list' 
  Sent: Friday, January 04, 2008 12:51 PM
  Subject: Re: REFLECTOR: glide ratio



  I had an unscheduled off-field landing in my 1996 SERG last year and have first hand  experience at guessing the glide ratio :-). I lost the engine at 1700 AGL and glided at 100KIAS about 1.25 miles with a 20 knot headwind. My constant speed prop was in climb pitch (it felt like a barn door hanging out in the wind). Not sure if this helps.

  Kirk Aragon
  N360TV

  Kirk, Robin;



  That turns out to be a glide ratio just over 5:1, after adjusting for the wind. I assume that is 'gear down'.  Heavily loaded? XL, SE, or LW?



  In practicing power off emergency landings, I found 'gear up' and 'gear down' to be quite different. With gear up, 90-95 KIAS, engine at idle (about 600 rpm on the prop), I was seeing a sink rate of about 600 fpm. That's a glide ratio of 15:1, which makes me think I better do that over again because it seems too high.

  SE RG loaded to about 1980 lbs.  I didn't check 'gear down'; but estimated around 9:1.



  More data needed,



  Al





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