On Aug 27, 10:25*am, mattm wrote:
On Aug 27, 1:36*am, Eric Greenwell wrote:



On 8/26/2010 7:16 PM, akiley wrote:

I mean clear the winds totally in SeeYou then enter the official winds
aloft forecast. *Maybe SeeYou does a better job, I haven't really
tested this. *I just look at my IGC file from this Wednesday and the
winds were supposed to be 320 at 12kts in the 3000 to 6000 range. *At
a few points spanning several minutes, SeeYou came back with winds
from 160 at 2 kts. * But maybe this happens and is to be believed. *Or
I'm really bad a drawing circles with a glider. *Probably the later..

I always let Mobile fill in the blanks. It does a good job of measuring
the wind while circling, so I think it's better to use the actual wind
instead of a forecast wind; less trouble, too. I will sometimes change
the wind settings when I know I am flying into an area where the wind is
different from what Mobile has measured. This is usually the final glide
to the home airport, and since I haven't flown near home for the last
few hours, the wind it measured after the takeoff and the first couple
of thermals as I headed out on course may no longer be correct. I bought this used iPaq which was listed as a 3700 on the reciept from
Wings and Wheels. *Just out of warrantee. *The label is worn and
unreadable on the back. *Don't know of a software way to positively ID
the unit. *It uses the CF cards and an add-on sleeve adapter to hold
the CF card. *I have the slightly newer SeeYou Mobil ver 3.12. *I have
had lots of IGC files with broken track or perfectly straight lines or
both. *Also, I have to reboot my iPaq on a daily basis. *Not sure if I
replace the iPaq next or the GPS. *I did get an uninterrupted file
this wednesday on a 2.5 hr flight in the Cirrus.

Mobile for PDAs is a mature, stable program. These problems are almost
certainly hardware related. Can you borrow another Ipaq for a flight or
two? I just have the navBox called "Magnetic track over ground" at the top
center used as a heading indicator, even though it really is'nt.

Unless you are really in love with magnetic bearings, I suggest you
switch to "track over ground" to use True bearings instead.

--
Eric Greenwell - Washington State, USA (netto to net to email me)

- "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarmhttp://tinyurl.com/yb3xywl

- "A Guide to Self-launching Sailplane Operation Mar/2004" Much of what you need to know tinyurl.com/yfs7tnz

I agree this may be a hardware problem. *What are you using for a GPS
source?
It may be losing lock periodically when you bank.

-- Matt

It's a GlobalSat BR-355 which I think is referred to as a mouse style
GPS that plus into the bottom of my iPaq 3700. If it was always
loosing a signal I would suspect that, but I don't have a really
concrete set of errors that point to any one thing. Intermittent and
varied issues I would describe it as. These have included the iPaq
suddenly wanting to reformat my CF card, intermittant NavBox problems,
usually showing data not available. Log file not stopping after
landing, log file not starting at all. Daily reboots usually required
when SeeYouM does not load. Some of these problems could have been
the CF card sleeve which I replaced a few weeks back because I seems
to be getting good uninterrupted IGC files now. Today, I'm borrowing
a friends iPaq, trouble it I have to order an adapter cord so my mouse
GPS can plug into it. I think iPaq changed the plug in the bottom at
some point. ... akiley