If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#51
|
|||
|
|||
Getting rid of the bugs and gotchas!
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 |
#52
|
|||
|
|||
Getting rid of the bugs and gotchas!
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 |
#53
|
|||
|
|||
Getting rid of the bugs and gotchas!
On 8/28/2010 7:06 AM, akiley wrote:
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 I suspect an Ipaq with a built-in slot would be inherently more reliable. The two I've used - 3830 and 2210 - had slots, and both worked without problems. Let us know how the new iPaq works out. -- Eric Greenwell - Washington State, USA (netto to net to email me) |
#54
|
|||
|
|||
Getting rid of the bugs and gotchas!
On Sat, 28 Aug 2010 07:06:45 -0700, akiley wrote:
-- martin@ | Martin Gregorie gregorie. | Essex, UK org | |
#55
|
|||
|
|||
required LD versus required MC to make it home ??
Thank you everyone for all the input on this subject. It's been very interesting to read these posts! I'm still digesting. To recap, I'm a fairly new glider pilot with only 30 hours. But I have spent a LOT of time with SeeYou Mobile in sim mode and with flight sims, testing, reading trying to take it all in. It really helps understanding the theory. In real world, I'm currently staying within range of my primary airport at all times. With a club Cirrus and not having formal cross country training (yet), this is what I must do for now. For the most part, I understand what everyone is talking about. To me, looking at required MC as a way of seeing how much reserve energy I have to make it home seems fairly straight forward and takes everything into account as long as I make sure all parameters are correct including safety altitude, bugs, winds aloft, polar and such. I like it because I can be flying away from home base and it will work without having to test by actually starting the final glide. For example, if I'm 10 miles out and I see a value of 10MC required, I know I can fly a substantially lower MC final glide and be sure of making it home. For a cross check it's easy to also look at required L/D versus achieved L/D especially as the final glide is in progress. It's also easy to look at arrival height. But I also like MC because it plays out in thermals, speed to fly and is seems to be the theoretical basis of making forward progress in soaring. Something I plan to use more and more as I progress. akiley Adrian, Michigan |
#56
|
|||
|
|||
required LD versus required MC to make it home ??
"akiley" wrote in message
... Thank you everyone for all the input on this subject. It's been very interesting to read these posts! I'm still digesting. To recap, I'm a fairly new glider pilot with only 30 hours. But I have spent a LOT of time with SeeYou Mobile in sim mode and with flight sims, testing, reading trying to take it all in. It really helps understanding the theory. In real world, I'm currently staying within range of my primary airport at all times. With a club Cirrus and not having formal cross country training (yet), this is what I must do for now. snip Thank goodness you are staying in glide range. Does the SeeYou simulator teach field landings? |
#57
|
|||
|
|||
required LD versus required MC to make it home ??
(Garmin is using GR Glide Ratio, not LD. The confusion comes to the fact that a "glide ratio" relative to the air is not the same to glide ratio relative to ground. LD should be used for indicating glide ratio relative to air, and GR or Eff for ground. But since most pilots don't care at all about the LD (air relative efficiency) because when we are gliding we are flying toward a ground point, then we all use either LD GR or EFF. Old instrument with no GPS are using LD and this is not accounting for wind. Even bigger confusion) Months ago I did experiment using current efficiency averaged in last 90 seconds for calculating altitude arrivals (using lk8000, not seeyou). During long glides it was very accurate. Currently arrival altitudes are calculated using your MC setting, but if you fall in sinking air and follow the glider's speed to fly indicator then you will speed up and use a different MC at all effects. So now I am experimenting what paraglider's are already using since time: the "equivalent MC", which is based on your airspeed and polar. In the end it is like using average efficiency. Personally I think that it's all a matter of guessing, and the good old GR or Eff is still the most simple and valuable parameter. paolo |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
I.D required | Glenn[_2_] | Aviation Photos | 8 | November 12th 08 10:22 PM |
ELT Required for all SSA sanctioned contests starting 2006 ELT Required for all SSA sanctione | Steve Leonard | Soaring | 2 | September 14th 05 03:49 AM |
There is no penalty for failing to make the required FAA reports or investigation! | Larry Dighera | Piloting | 9 | October 12th 04 04:06 AM |
New Home Required | Ged McKnight | Soaring | 0 | February 1st 04 08:11 PM |
Good Home Required | Ged McKnight | Soaring | 6 | January 27th 04 10:00 PM |