Hi Christian,
Yes a crazy amount of useful information - across many threads, with some that appear to be running in their own parallel universe (different airframes and types etc) and some cross pollination going on between them too, thanks to some very active members…so there’s a lot to read, to sort out where to best place your efforts and zero in on the things that are relevant to your own situation and interests and also where you may be able to provide some relevant input of value to other users as well etc…way better that though, than no activity at all…it is a strong and vibrant community!
Yes I can see why you would want a 12S power system…I’m sure you will need it with your configuration. Do you use the Emlid gear for CGP’s and ground based feature survey data to tie in to your multispectral survey data? Do you ever collect GNSS event data in the air with an M+ or M2 for RTK or always just PPK on board your aircraft?
Thanks for your advice on the RTK side of things. It helps to put this into perspective for a practical and efficient workflow, and not to overdo or replicate the basic process.
I will just be using the single band Emlid RS+ and M+ with the hotshoe trigger to start with. I’ll mostly be out in the open (not really much in the way of mulit-path problems). I agree, RTK is great when it is all working and mildly inconvenient when it’s having interruptions on ground based surveying - and much worse if it drops in and out whilst in the air…So I guess what you’re saying is, I’d still have to back fill the RTK data holes by PPK processing anyway, so why bother with RTK in the first place? Makes perfect sense and makes for a less complicated and less power hungry setup…
I used a couple of different CORS based RTK systems from Topcon, collecting infrastructure data for my GIS at the University I used to work for, over the last ten years and the RTK was sometimes a bit flaky - there’s lots of components that all need to be working together in order to deliver the corrections.
I’ll probably still use the Here 3 and Here + for the nav side of things, so that system should take care of those duties and the camera event data can be recorded separately on the Emlid system - and to the Pixhawk 2 logs maybe?..or do you think that there is no point to even use the Here3/+ RTK system for the nav? I am just thinking here about accurate flight path repeatability for things like mapping grids, inspection routes, transects and the like…
I really look forward to seeing your setup photos…especially with the separated power systems…this is also an idea I have had stuck in my mind for some time…a lot of advice I have had from others is to just go with ONE big Lipo to run everything…I am still determined to separate my systems but open to suggestion…
I have in mind for my setup, a 6S - 6000 mAh Lipo (2x3000 in parallel) setup for the VTOL system and a 4S - 14000 mAh LiIon (2x7000 in parallel) for the thrust system (where less current draw is required and the Lithium Ion providing more mAh capacity for a given weight) - just thinking about multiple redundancy here by having two batteries in each circuit and separating each of the power systems, and having the lift Lipo’s nice and fresh(ish) provided I get a clean/quick take-off and transition - ready to deal with whatever the conditions may be when landing later in the flight…Also possibly have a third dedicated small Lipo/LiIon to run other things from an 8 amp UBEC and provide some more redundancy… I’ve sketched up a rough draft diagram a few weeks ago of what I was thinking and should dig it out and share it for others’ comments…
I really like the idea of the Fighter (and its ability to add more gear or batteries later if I start light) although the more I move towards starting this project, the more the MFE Striver starts to make more sense for my application and component setup…anyone here building or thinking about building this airframe?
As I said in an earlier post - I may even put this all together first on a Ranger Ex as a test bed unit so I can learn and make my mistakes on this. Any thoughts on this?
Cheers
Jeff