AIP download very slow

Important: These forums are for discussions between SkyDemon users. They are not routinely monitored by SkyDemon staff so any urgent issues should be sent directly to our Customer Support.

AIP download very slow

Author	Message
stipe	s stipe posted 4/3/2025 8:30:58 PM Topic Details Share Topic
s Group: Forum Members Posts: 3, Visits: 0	I observe that the download speed of AIP charts from all countries, as well as additional flight guides (e.g. AvioPortolano) has become very slow since some weeks. The AvioPortolana for example with 800 MB downloaded once in 2 or 3 minutes, now it takes nearly 30 minutes. Observed on Mac, iPad and iPhone, all with the latest Skydemon version.
	Reply Like 0
Tim Dawson	Tim Dawson posted 4/4/2025 8:37:10 AM Post Details Share Post
Group: Forum Members Posts: 8.2K, Visits: 9.8K	That's strange. I just tried downloading the whole of Avioportolano as you mention, and it took 2 minutes 44 seconds to download the 860mb. Perhaps you were trying to download it at a time of high contention, for example on an AIRAC day when there will be thousands of people all trying to do the same thing.
	Reply Like 0
Schokex	S Schokex posted 1/18/2026 3:09:54 PM Post Details Share Post
S Group: Forum Members Posts: 2, Visits: 0	I have a similar issue. When downloading AIP or maps via WiFi (or LAN on my computer) in SkyDemon, it is unbelievably slow (maybe a couple 10 kb/s). If I switch to cellular it works fine. Tried with Windows, Android and iOS. My ISP is Telekom and I have a feeling that it has to do with them. If I set up a hotspot with my phone and connect to it with my tablet, it is fast. If I connect to WiFi with Telekom ISP it is super slow. Tried at 3 different locations (unfortunately all Telekom ISP) with the same result. Browsing, downloading anything else, etc. is fast. It is just SkyDemon where I experience the issues. Any suggestions how I can resolve this?
	Reply Like 0
Tim Dawson	Tim Dawson posted 1/19/2026 10:20:13 AM Post Details Share Post
Group: Forum Members Posts: 8.2K, Visits: 9.8K	We have a few customers experiencing this issue at the moment. So far, we haven't understood the cause of it. Our servers seem fine, as far as we can tell, and it doesn't seem to be an issue with a particular version of SkyDemon. So we continue to scratch our heads.
	Reply Like 0
Schokex	S Schokex posted 1/25/2026 9:29:40 PM Post Details Share Post
S Group: Forum Members Posts: 2, Visits: 0	Just for information: downloads work fine again. I didn't change anything on my end.
	Reply Like 0
Adam Erchegyi	Adam Erchegyi posted 1/26/2026 7:22:34 AM Post Details Share Post
Group: Forum Members Posts: 113, Visits: 2.3K	+x Schokex - 1/25/2026 9:29:40 PM Just for information: downloads work fine again. I didn't change anything on my end. same here. Last airac was very slow; this week's normal.
	Reply Like 0
Tim Dawson	Tim Dawson posted 1/26/2026 10:05:10 AM Post Details Share Post
Group: Forum Members Posts: 8.2K, Visits: 9.8K	This is very puzzling, but I am glad speeds have returned to normal, at least for now.
	Reply Like 0
Andreas	Andreas posted 1/28/2026 6:58:27 PM Post Details Share Post
Group: Forum Members Posts: 19, Visits: 123	+x Tim Dawson - 1/26/2026 10:05:10 AM This is very puzzling, but I am glad speeds have returned to normal, at least for now. At the moment it is very slow here. I tried to download France Charts, and the progress bar is not moving since 10 minutes. BR Andreas
	Reply Like 0
Andreas	Andreas posted 1/29/2026 9:41:45 AM Post Details Share Post
Group: Forum Members Posts: 19, Visits: 123	+x Andreas - 1/28/2026 6:58:27 PM +x Tim Dawson - 1/26/2026 10:05:10 AM This is very puzzling, but I am glad speeds have returned to normal, at least for now. At the moment it is very slow here. I tried to download France Charts, and the progress bar is not moving since 10 minutes. BR Andreas Since a few minutes it is working again.
	Reply Like 0
Johannes B.	J Johannes B. posted 1/31/2026 10:52:26 AM Post Details Share Post
J Group: Forum Members Posts: 53, Visits: 1	+x Andreas - 1/29/2026 9:41:45 AM +x Andreas - 1/28/2026 6:58:27 PM +x Tim Dawson - 1/26/2026 10:05:10 AM This is very puzzling, but I am glad speeds have returned to normal, at least for now. At the moment it is very slow here. I tried to download France Charts, and the progress bar is not moving since 10 minutes. BR Andreas Since a few minutes it is working again. 20 Minutes to download the Croatia chart here... YouTube channel
	Reply Like 0