Electronics > Beginners
Home Made Aircraft for Video -> what is on the Marked Available?
beanflying:
--- Quote from: Lord of nothing on February 25, 2019, 10:15:30 am ---
@beanflying you think about some cute small Hobby Jet I personally think big like a Military Drone. >:D
So does anyone ever bolt an Dome Camera to an Aircraft?
--- End quote ---
Don't be to cute or dismissive!
You need to take my advice seriously. I have been playing R/C performance toys for a very long time. Rules will be much the same as below throughout Europe. You are out of VLOS before you turn the key - FAIL.
https://www.uavsystemsinternational.com/drone-laws-by-country/austria-drone-laws-2/
Want to play hardcore military style start at six figures and years of red tape for approvals for what you want.
Having a dream is great but take a large dose of reality first.
Lord of nothing:
--- Quote ---A normal train would be 36-110kph.
--- End quote ---
In my Country the max speed is very low:
In Italy the Train goes often faster: :-[
--- Quote ---A $40 F4 flight controller running iNAV firmware (free) can fly autonomously and follow GPS waypoints.
--- End quote ---
How does it handle when something happened outside of there parameter? That way I want use 3x Units who must confirm the other 2x or the Data get thrown away to reduce the chance for an error.
--- Quote ---building a RC plane that can fly at 250kph is doable but very hard.
--- End quote ---
So what is major problem with? Frame, Structure, Wings,...? The good thing with an Autopilot System the can react much fast and can overwatch all parameter at the same time. That mean for example if one of two Engines Vibrate to much, get to hot,... the can immediately abort the flight and land on an designate alternative landing strip (aka Grass) where someone from a Recovery Team wait if there is an emergency landing. An Model who is fly by Hand have much more trouble to over watch all parameter and decide to land before something happening.
Here is a Video where an derailing happened in Vienna.
Swatch how long it take until the Train stop. I am not sure but I think there is no safety gear who check if the Boggy is on the Track or not. ::)...
If there where any the Train would immediately make an emergency break.
--- Quote ---Range might be an issue following trains
--- End quote ---
Big Aircraft = room for Fuel
Thats another thing to calculate.
--- Quote ---Want to play hardcore military style start at six figures and years of red tape for approvals for what you want.
--- End quote ---
In Germany a Guy build an huge A380 Model:
sure the will be lighter but that is the Wing Size I would stick with.
The Wings could made out of a Fiber Material. Maybe Glasfiber or Carbon (depend what the Backing Cost).
--- Quote ---and hang the lens out the window.
--- End quote ---
Thats not work I need a Dom Camera who is controlled by Software for follow. The must also shock and rubbel profe.
Psi:
--- Quote ---In Italy the Train goes often faster:
--- End quote ---
ok yeah, you're following super high speed trains. Fair enough.
--- Quote ---How does it handle when something happened outside of there parameter? That way I want use 3x Units who must confirm the other 2x or the Data get thrown away to reduce the chance for an error.
--- End quote ---
I've not looked into majority-rules fail-safe flight controllers for models.
I'm not aware of any iNAV feature to do that. The issue would be the PID controllers and feedback.
Without some careful design you'd likely get compounding differences between the output of each flight controller. Caused by either the fact one has control and the others don't or caused by the fact that all have control and each is detecting the input from the other as an error to be corrected.
You would need to do the majority-rules calculations on the inputs to each flight controller (GPS, Accel, air speed, etc). Only then could you do a majority-rules decision on the outputs of each flight controller and expect them to all be identical (or within a few %).
--- Quote ---So what is major problem with? Frame, Structure, Wings,...? The good thing with an Autopilot System the can react much fast and can overwatch all parameter at the same time. That mean for example if one of two Engines Vibrate to much, get to hot,... the can immediately abort the flight and land on an designate alternative landing strip (aka Grass) where someone from a Recovery Team wait if there is an emergency landing. An Model who is fly by Hand have much more trouble to over watch all parameter and decide to land before something happening.
--- End quote ---
Yes, to fly at 250kph it needs to be aerodynamic. My delta wing RC plane is quite aerodynamic and it can get up to 150kph on a good day, but the flight time at that speed would be ~3 minutes vs ~25min if flying at 60kph instead.
The power required to fly through the air at 250kph is huge. A lot of the energy is being used just to overcome air resistance.
So not only do you need a very aerodynamic craft but you burn through a massive amount of energy/fuel compared to flying slower.
Electric power wont work for sustained 250kph over many kilometers. It would need to be ICE or gas turbine powered.
--- Quote ---Big Aircraft = room for Fuel
--- End quote ---
Yes but material strength doesn't scale, a smaller aircraft is stronger for less material needed.
A smaller aircraft can devote more of its mass to fuel vs construction materials and so get longer range.
So you only make it as big as you need to carry the payloads you require.
Mechatrommer:
--- Quote from: Lord of nothing on February 25, 2019, 10:50:11 am ---
--- Quote ---Want to play hardcore military style start at six figures and years of red tape for approvals for what you want.
--- End quote ---
In Germany a Guy build an huge A380 Model:
[youtube]
--- End quote ---
unfortunately i dont believe thats a 230kmphers. if you want to push that shape into that speed, yeah i guestimate maybe about $1K/month on fuel for daily flight. so its true 6 figures in 100 months.
beanflying:
Unless you want to live in the real world stop imagining scenarios that have no basis in fact.
4-5km/minute puts you out of sight in 20 seconds - FACT
Rules state must maintain VLOS. Trying to get to speed and shoot video under this regulation makes it a WOFTAM.
That fat slug replica jet would be lucky to break 200km/hr. Turbines do not equal speed in all cases. In most countries of the world it will require a permit every day it is flown as well as 150-200+m of very good prepared runway.
Based on your last post you have never built any R/C airframes let alone something approaching the standard of what is needed for 250km/hr.
Go hire a fast full sized plane and get a proper camera with a big lens.
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