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#11
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"John Galloway" wrote... That's my point - you can configure winpilot/GlideNav for a bugs adjusted final glide height calculation on your PDA but there is no capability for the 302 to accept a bugs adjusted polar from either the PDA or a 303. This is confirmed by CAI who, when I queried this, said there was no need for a bugs page on the 302 or the 303 because the 302 couldn't use it. The 302 accepts, but ignores, the bug setting. The 302 data protocol includes a command to send a new polar, if the authors of the PDA wanted to, they could send an updated polar each time the bug setting changes. Apparently, some don't want to... Marc |
#12
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Marc,
That is a very interesting and, to me, surprising piece of information. Here is what Peter Rogers sent me on Feb 10th in answer to a query about using a 302/303 combination which I had found had no setting for bugs at all: 'Hello John - As you know the 303 does not currently have a 'Bugs' screen. The reason for this is the 302 does not utilize any 'Bug' information in determining final glide. We may at some point implement it but it has not been a high priority. Since it's not used we didn't see a point of making a screen for it since it would give our customers a false impression that we were using the value in our calculations when in fact we were not. Pete' Which software does send a new bugs adjusted polar to the 302? Will it make the PDA software, the 303 final glide altitudes, and the 302 speed to fly all use the same polar? I know that GlideNav and PocketNav do not because if I fly in buggy conditions and put a bug factor in GlideNav the GN final glide altitudes and the 303 final glide altitudes diverge subsantially so the bugs setting on GN is only being used there and not sent to the 302/303. The ballast setting is sent. Thanks, John Galloway At 09:48 13 September 2003, Marc Ramsey wrote: 'John Galloway' wrote... That's my point - you can configure winpilot/GlideNav for a bugs adjusted final glide height calculation on your PDA but there is no capability for the 302 to accept a bugs adjusted polar from either the PDA or a 303. This is confirmed by CAI who, when I queried this, said there was no need for a bugs page on the 302 or the 303 because the 302 couldn't use it. The 302 accepts, but ignores, the bug setting. The 302 data protocol includes a command to send a new polar, if the authors of the PDA wanted to, they could send an updated polar each time the bug setting changes. Apparently, some don't want to... Marc |
#13
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"John Galloway" wrote...
Which software does send a new bugs adjusted polar to the 302? Will it make the PDA software, the 303 final glide altitudes, and the 302 speed to fly all use the same polar? My homebuilt software changes the polar in the 302 when the bug setting is changed. This affects the 302 STF indications, but would not, to my knowledge, change anything in the 303 (I don't have one). The 303 listens for changes in ballast, MacCready, etc., from the 302, but there probably isn't any way for it to know that the polar has changed. The only way to get bug support in the 303 is to lobby Cambridge to change the firmware. Marc |
#14
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Marc,
Thanks, I understand now. That would be a step in the right direction and I think that a new pre-calculated polar sent to the 302 will probably be used by the 303. However that is not quite the same as the 302 having the ability to calculate a new polar for itself from a bugs setting entered on e.g. a hypothetical new bugs factor screen which is what I think would be far more generally useful (essential) in that it could be used no matter what software is used in the PDA or even with no PDA for 302/303 users. In the case of ballast settings, I think that GN11 sends a setting to the 302 (which then calculates the ballast adjusted polar internally) rather than sending a newly calculated polar, so the 302 should be able to do the same for bugs settings sent from the PDA - IMHO. Another note to CAI I think. John Galloway At 18:42 13 September 2003, Marc Ramsey wrote: 'John Galloway' wrote... Which software does send a new bugs adjusted polar to the 302? Will it make the PDA software, the 303 final glide altitudes, and the 302 speed to fly all use the same polar? My homebuilt software changes the polar in the 302 when the bug setting is changed. This affects the 302 STF indications, but would not, to my knowledge, change anything in the 303 (I don't have one). The 303 listens for changes in ballast, MacCready, etc., from the 302, but there probably isn't any way for it to know that the polar has changed. The only way to get bug support in the 303 is to lobby Cambridge to change the firmware. Marc |
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