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  #11  
Old 04-02-2017, 05:03 PM
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snopercod snopercod is offline
 
Join Date: Aug 2016
Location: Asheville, NC
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Quote:
Originally Posted by Tankerpilot75 View Post
What "best glide" speed and "glide ratio" are people using...
Foreflight has some guidance: How do I determine the glide ratio for my aircraft?. That doesn't help much because it tells you to use the POH numbers. Since there are so many variables, the best thing is to determine your glide ratio yourself in your own airplane. It's not that hard, but requires a little math to convert nautical miles to feet (see link above).

Pick a no-wind day and do a series of timed power-off, constant airspeed descents from... say...5,000' to 4,000' at your best glide speed. Note your Ground Speed or GPS distance and convert that to feet. Your glide ratio is the horizontal feet divided by the vertical feet. I dictated into my Garmin Virb camera to record all the numbers, but you can just as easily jot the numbers down.
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  #12  
Old 04-03-2017, 12:41 PM
Smilin' Jack Smilin' Jack is offline
 
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I have to agree with RV8JD, Carl,
I have mine set up on my Dynon and it adjust the circle for the glide in any head wind or tail wind situation.

So far it is fairly accurate, And your glide distance to a spot on mother earth will be a function of you Ground Speed.

Jack
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  #13  
Old 04-04-2017, 05:00 AM
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chepburn chepburn is offline
 
Join Date: Apr 2006
Location: Ottawa , Canada
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Yes, its a cool -looking- feature.

However, other than giving you situational awareness of whether an airport is close to your ring while everything is ticking along without problems , shouldn't all of us -know- our approximate glide target with our eyes out of the cockpit?

I don't know about everyone else, but I'm going to be too preoccupied going through an emergency checklist and looking -outside- to find my best options to put the aircraft back on the ground. I wont be looking down at my kneeboard.

That being said, it would be a good training tool to give you an idea on what your glide circle is when you are practicing. Just don't rely on it.

My 2 cents. (Maybe I should just drink some coffee )
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