Mailing List lml@lancaironline.net Message #62827
From: Jarrett Johnson <hjjohnson@sasktel.net>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] doglegs:shorter than they look! vs GL water survival
Date: Thu, 23 Aug 2012 12:53:09 -0400
To: <lml@lancaironline.net>

Good point! Also the earlier in the flight you divert, the less they cost in distance/time. A 15 mile cut from 150miles back adds maybe 1-2 miles but from 10 miles out it adds nearly the whole 15 miles..

 

Fwiw

 

J. Johnson

235/320 55% [and holding]

On Wed, 22 Aug 2012 14:25:16 -0400, cwfmd@yahoo.com wrote:

Look up dog leg at Dictionary.com
"bent like a dog's hind leg," 1703. Originally of a type of staircase.
 

A quick flight planning exercise for the IV-P. I selected two worst case over water flights at FL200 around L Superior(DLH to YXZ) and L Michigan(OBK PMN). It only seems to add 5-7 minutes to the flight to avoid the "outside glide range" area. Just from a time efficiency standpoint(planning, gear, training, etc), this seems like a faster strategy.

 
Same applies to ice or CBs. The plane is so fast, why not go around it and enjoy the scenery in VMC for an extra 10 minutes, instead of white knuckles? A divert to the right can also pick up a tailwind around the Low, and you can beat your counterpart who went thru the middle of it!
 
If you have a flight planner that lets you do "rubber band" diverts around "dark stuff", it is always impressive how little distance the dogleg adds. That triangle distance looks a lot bigger than the straight line, but it really isn't, as a fraction of the total trip.
 





 


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