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03-02-2007, 11:55 AM
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Join Date: Jan 2007
Location: LI, NY
Posts: 409
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Zones of safety
A friend of mine once showed me a feature on his GPS called Zones of Saftey, I think is what it was called. It showed areas around the airports that were within gliding distance. If you were allways within the zones of saftey you would always be within gliding distance of an airport. I though this was a great feature. It took into account the gliding distance of your aircraft, and your altitude. As you went higher the zones got bigger. I can't find this feature on any GPS I look at now. I may be calling it the wrong name. Does anyone know of any GPS's that have this, or a similar feature?
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Richard Fazio
LI, NY
N966RV
RV-6 Slider
O-360
FP Wood Prop
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03-02-2007, 12:04 PM
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Join Date: Dec 2006
Location: TexaRado
Posts: 772
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03-02-2007, 12:14 PM
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Join Date: Jun 2005
Location: Cedar Park, TX
Posts: 3,152
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Very cool. I was just talking with someone about exactly that concept a couple of days ago and how it could be implemented. I didn't know it already existed.
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Scott Card
CQ Headset by Card Machine Works
CMW E-Lift
RV-9A N4822C flying 2200+hrs. / Cedar Park, TX
RV8 Building - fuselage / showplanes canopy (Done!)
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03-02-2007, 12:25 PM
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Join Date: Jan 2006
Location: Dallas, TX (ADS)
Posts: 2,180
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The Chelton EFIS continuously calculates your gliding range based on airspeed, altitude, wind data and terrain elevations, all of which the computer knows, and shows it as a "circle". I think it also considers turns when looking at the area behind you. Pretty cool.
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Doug "The Other Doug Reeves" Reeves
CTSW N621CT - SOLD but not forgotten
Home Bases LBX, BZN
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03-02-2007, 01:31 PM
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Join Date: Mar 2007
Location: Morgan Hill, CA
Posts: 6
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Two companies implement the feature..
Chelton indicates from the aircraft. AWM indicates from the airport.
Both companies have patents on their respective methods. 
Oh well.. Maybe someday the US Patent office will wise up on the stupidity of Software Patents.  |
03-02-2007, 05:17 PM
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Join Date: Jul 2005
Location: Detroit, MI
Posts: 1,587
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Wind?
Unless it computes with wind as a factor, it is not very wise, IMHO.
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H. Evan's RV-7A N17HH 240+ hours
"We can lift ourselves out of ignorance, we can find ourselves as creatures of excellence and intelligence and skill. We can be free! We can learn to fly!" -J.L. Seagull
Paid $25.00 "dues" net of PayPal cost for 2015, 2016, 2017 and 2018 (December).
This airplane is for sale: see website. my website
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03-02-2007, 08:38 PM
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Join Date: Jan 2005
Location: NE Texas
Posts: 31
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Zones of safety
I think it is called cones of safety and I have seen it on some hand held GPS units, but I don't recall which one.
Kacey
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Kacey D.
RV12 Tail kit Inventoried
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03-02-2007, 11:31 PM
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Join Date: Nov 2006
Location: Calgary, Canada
Posts: 408
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Quote:
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Originally Posted by Alex Caldwell
I run it on an old Handspring Visor
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Whoa! That's like Commodore 64 terms in handhelds, isn't it? 
__________________
JV
Calgary, Alberta, Canada
RV7 QB - Airframe largely complete, sans canopy and glass... unfortunately sold
RV6 - O-360-A1A, Hartzell CS, dual G3X VFR... purchased
Dues paid 2015
"Being defeated is only a temporary condition; giving up is what makes it permanent."
-- Marilyn vos Savant
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