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Ah - cool. That's going to sound awesome :-)

I haven't tried wood, so I can only report on CF. They are very well made and perfectly balanced right out of the box (at least, mine were: your mileage may vary). Lot's of lift, quiet, light - I couldn't be happier with them.

Are you sure you can fit 18" props on there? That must be a big hex. You'll be making a whole lot of thrust with those props - are you sure they need to be that big? 17" would hover 9kg comfortably at just under 50%. In terms of brand, T-Motors really are nice and worth the price IMO.

Yes, getting that cloverleaf on the MR in the same plane as the one on your goggle will certainly help. When I was at 5.8GHz I ran a diversity receiver on the ground with a 13dBi patch antenna and that thing rocked! I could easily go a mile - I never did test the full limits.

Wow - you put 5999 back in a 5800 battery?! You depleted that WAY too low. That battery isn't going to last long like that. Set your alarms so you know when you get to 80% and land right there - my Naza is set to auto-land at 80%. Just buy a spare battery to swap out if you need longer total...

Was that measured under load or a few minutes after you landed? 3.37V is too low for a LiPo if you've given it a chance to bounce back. Under load 3.37V is probably about right. You ought to be at around 3.7V for a healthily depleted battery (after you've given it a few minutes to bounce back)...

Sounds like you made a big improvement - that's great! The thing to do now is to recharge the battery and note how much energy you are putting back in in mAh. You don't want to run the battery below 20% or you will significantly reduce its life. So for your 5800mAh battery the max you want to...

Yes, exactly. 2x 10Ah on 4S and 2x 5.2Ah on 6S. Always two in parallel so you have some redundancy in case of a problem. One battery on top at the C of G, the other below and behind to balance the camera and gimbal which is extended forward to miss the rotors.

Well, that may be true - it's certainly worth getting a prop balancer and checking them if they are used props (or even brand new!)

No - I just trusted eCalc and took a chance that it was right. So far eCalc has been spot on with my setup. I'm not saying that the 4S/17" setup is the most sporty - I have the gains set pretty "loose" since this is my floaty, loiter mode. I run at 6S with 14" props when I want to be a bit more...

Yes, Multistars. And I use the iCharger 106B+ which works like a champ. It will charge the 10Ah batteries at 1C just fine, and has a host of great features and great reviews. I don't think you can go wrong with it.

The 4014's run great at 4S - I'm turning 17" T-motors on them and they purr like sleepy kittens. 30+ minutes with 2x 10Ah batteries and all systems blazing (GoPro, gimbal, 1W VTx, EzTelem etc.)

Racing quad! It's new, fun, cheap. Everyone is out there building AP quads so it would be fun to do something a bit different and really kick off that part of this forum. The troop carrier does sound good though....

Yes, very true. Even a controlled non-VRS descent can seem a bit dodgy. I always descend in a spiral so I have some lateral movement which creates more control authority and gets you out of that VRS column.

That "wobble on decent" is called "vortex ring state" (VRS) - lots of discussion on here and elsewhere about it if you want to learn more. Basically it's a common symptom of trying to descend through your own prop downwash and can affect any rotor-craft, so it's not a problem with this rig.

Subscribing - awesome project! Can't wait to see this in the air. Great work, guys.

I'm sure people will enjoy having their hair and food blown all over the place by the downwash. Jeez.

I actually can't remember what's in the free version. Go ahead and pay - it's really cheap, there are a ton more options to choose from, and it's good to support someone who makes such a useful tool.

Also, are you really planning on running batteries that big? Consider that running 2 x 10Ah batteries is only marginally heavier that 1 x 20Ah, but having two in parallel gives you some very nice redundancy which is always a good thing in the air.

Just do a custom battery and remember that the eCalc weight is per cell, so make sure you calculate that from the battery manufacturer's specs.