Yep, you heard me right, I'm going to build the world's first supersonic RC plane, almost doubling the world's present RC speed record. Reason why I'm doing this is to get the attention of the aerospace industry so that they might consider me someday.
Yes, I know the technical challenges will be enormous, but that is why I am doing this, to demonstrate what I can do. Plus it will finally be a chance for me to put my degree to use.
Now the biggest challenge will be finding a place for me to actually fly supersonically, not that every flight has to be supersonic. I am aware that when airplanes travel at that speed a sonic boom is usually created. However, since this design will be smaller, so will the sonic boom.
Another concern of mine will be heat, as air friction compresses the air, heating it up. The temperature I estimate I will reach will exceed the maximum of some of the components, so I will need some sort of cooling mechanism, and just fans won't cut it.
Now I know some of you may have alarming concerns, but if you calmly address them with me I will address them. I'm posting this here because I may need advise for the type of parts I need and other recommendations you may have.
Aerospace V logger out.
Crowdfunding is supposed to be for exactly this sort of thing! No market to commercialize it, but people fund it out of excitement. The perks should be things like t-shirts and a thank-you videos or something. The selling of actual (or more commonly, impossible) products through crowdfunding isn't the way it's supposed to work. I'd donate a significant amount of money, and I want a "supersonic R/C" tshirt just because I want to see how your project goes and show off that I think it's an exciting idea! I have low expectations for your success, but I want to see you try.
A turbine alone is around 3 grand or more. You'll Need more, If you do it with rockets it will be cheaper but not very impressive... then it just turned into a rc rocket.
Heres a rc jet flowen line-of-sight that does 400mph https://www.youtube.com/watch?v=sa-TSNeTK-A
P.S. funny you started this thread, I was just going start one about turbine uavs and how fast I could go if I built one ;)
As the others said, crowd funding is great. You have to know what you are doing and explain it well cuz they are the ones funding it, Have 3d plans, parts list, etc...
I know it will be difficult, but I went to school for this and for once I want to use my degree for something.
So what formulas and design information would you like to know? The platform is not strictly a flying wing or tailless. The wingtips are the tails, and I decided this in order to deal with wingtip vortexes causing the finite wing to act like an infinite one. In other words adding a tail in this way would only INCREASE the lift-to-drag ratio.
As for overall dimensions, I guess the wingspan would be about 3 feet, something you can fit in the back of a car. And don't worry, they're swept back at an angle of 45 degrees. Question is what type of airfoil should I use? I recommend something for low supersonic, around Mach 1.1.
And yes, I will be a different person by the end of this. I will be more experienced. Now do you have any further questions?
Funny you should mention that because for the next project I was thinking about something that could reach space. It would not be a sustained orbit just a sub-orbital lob. As for propulsion it would be a variation between a rocket and ramjet, depending on speed and altitude. If you know some of the problems of rocket design you would realize using local resources for propellant would save a LOT of weight. That is why the majority of the mass of a rocket is usually fuel/oxidizer, and planes only need enough fuel to fill the wings.
But this is another topic for another time, after I've finished this one.
Its an Interesting project! Have you considered the following factors
> Airframe design
> Power plant
> How will you control the aircraft at your intended speeds.
If you do manage it build it at your assumed budget... there will be lots of interested parties in your project from around the world. 3K is very low budget for such an ambitious project.
Anyway good luck and keep us updated on how you get on.
Almost a flying wing with a lengthy fuselage for the engine assembly. The wing tips will be the tails, and the elevons will be mounted on top of them. Also the wings will be swept back at a 45 degree angle. What type of airfoil type should I use for Mach 1.1?
Power Plant: An EDF with ethanol-fueled augmenter. The platform can fly in all-electric mode but not supersonically without burning fuel. Imagine the RC equivalent of a hybrid car. Also it will use a linear aerospike nozzle in order to save cost and weight.
Control: Well, one of the bigger concerns of mine will be the range of the FPV and remote control equipment. I'm going to need some serious range booster equipment for my ground station. Another concern of mine will be how to install the antennas without any signal interference or the supersonic aerodynamic forces shearing them off. What do you advise?
an interesting project you have there.
A question concerning your fuselage: Can you supply a sketch of your intended fuselage? You say it is not a flying wing, but "The wing tips will be the tails". I cannot quite imagine the difference between what you describe and a flying wing... Did you also consider strucutural issues? Will it be made out of carbon fiber or what do you intend to use?
A question about control: Do you plan to fly it line-of-sight, or do you want to use an automatic control system?
Quick couple of questions
Are you planning to close the air intake into the EDF once the Ramjet kicks in.?
What size airframe are we talking here?
What do you think the weight of the complete craft would be just before take off.
Mach 1 is about 340m/s. Assuming you reach the target speed, the craft will be traveling almost 41KM every 2 minutes. What kind of radio gear will you be using to ensure you remain within range?
Are you aware that the FAA only authorizes super sonic flight for military use above 10 000 feet and prohibits supersonic flight for all civilian aircraft (in most cases .. the Concord was the only civilian jet permitted to go supersonic until it was retired)?.
Supersonic flight testing of ANY aircraft may also only be done in certain locations on the planet and these tests are very very strictly monitored and regulated. Where are you planning to fly this beast you building.
Everything you said sound very much like theory at the moment. Do you have any CAD or mathematical models "in action" you can share?
Again wingspan around 3 feet or 1 meter. So far I'm thinking the weight will be about 10 lbs or 21 kg.
As to where it will be flown supersonically, I was hoping you can fill me in on that. I guess I could fly it over the ocean, where supersonic flight for the Concord was authorized.
As for the mathematical models, I do have some excel spreadsheets I've created, but it is partially based upon guesswork. I need to still put together raw aerodynamic data.
Any further questions?
With that level of precision you will succeed before you know it.
Hahaha. I was playing along with this post until I saw the $3000 number.
How exactly are you going to control a 3ft dot in the sky moving at 800mph??? You won't be able to see it. And you will fly out of range of FPV in a few seconds. And your FPV camera probably won't even be able to see anything moving that fast. You would need to use a GPS guided flight controller, since you will not be able to control it from the ground. I highly doubt the APM or Pixhawk can handle that.
This thing could only be safely flown over unpopulated ground or water. Since it will basically be an experimental guided missile. The desert or an ocean.