"What's the wingspan? Assuming the cylinders are 100 mm in diameter and 1000 mm long, the total volume comes to some 15-16 liters. As a rule of thumb, one liter of hydrogen (or helium) offsets one gram of weight. So you'll be lifting 16 grams tops.…"
"It would help with prop wash on descents in ideal gas. Real flow has turbulence below the craft no matter what you do. It's very easy to test - get it to hover and then get some smoke above it (visco fuses work well). You'll see massive vortices…"
"You might want to read up on Pendulum rocket fallacy and then remove that silly 10° tilt. You'll gain some extra flight time, reduce the complexity of your build and you won't be losing any stability. At all."
"@Greg Dronsky, yeah! There are 10% hover time gains every single time. You can visualize what's going on with sound (no more sharp buzzing) and smoke - the intake part of the prop has air coming in slowly from a 180° hemisphere and exiting fast in a…"
"What's the reason for using an FPGA here instead of a libc-compatible 8-bit microcontroller such as AVR? Other than "that's all I had lying around". More expensive, more difficult to program and debug..."
"Chris: as others have said already, it's the certification that racks the price up. A transponder that isn't certified and sealed (and probably audited every year for a nominal fee) is as good as no transponder, because then it would be possible to…"
"It is a bad idea, even the slides say why. The transponder is a 1lb brick, costs in the neighborhood of 5 grand and when boiled down, this is just the Gov forcing people to buy a product of select few companies, nothing else.
And, as usual, those…"
"Unobtrusive tips (embedded into the splash screen) are a great idea - they've been used in all of the later Call of Duty games and worked fine.
90s style tips in individual pop-up windows are a waste of time - everybody turns them off on the first…"