stable flying wing design setup, propelled by silent isothermal compressed air and solar stirling engines (posted in reddit)

Homebuilt Aircraft & Kit Plane Forum

Help Support Homebuilt Aircraft & Kit Plane Forum:

Status
Not open for further replies.

fizzle

Banned
Joined
Aug 24, 2021
Messages
122
aircraft clouds 12.png
aircraft clouds 5.png
aircraft clouds 6.png
aircraft clouds 10.png
aircraft clouds 9.png
aircraft clouds 8.png
aircraft clouds 11.png
this plane has had a good reception reddit, mostly for the energy source https://www.reddit.com/r/AerospaceEngineering/comments/pkmdz6
hi, this type of aircraft could be used thetered to a balloon (filled with hydrogen or biomethane) as cited in the thread world travelling hybrid aircraft-balloon airship powered by the jet stream and an array of isothermal air motors and solar stirling engines., however solar stirling has 40% efficiency compared to 20% PV and isothermal compressed air has 4 times the capacity of lithium ion and solar stirling can be used to compress air for night flight, so this airplane alone could outperform range and flight time of solar impulse that had problems with battery heating and completed a 7.200 km during the longest leg flight from japan to hawaii in 117 hours.

these are recent developments and i tried to include an appropriate mix to improve the handling and safety of a tailless flying wing that was chosen because it has plenty of wing area for solar energy, wider cabin and stronger structure all based in the wing, compared to the sailplane design of solar impulse aircraft where structural support is wasted in the fuselage and engines pods. this is a high efficient airplane which can increase flying over the sea by using the ground effect, and it's the only seaplane or airplane that doesn't disturb whales, marine, birds or human populations because both stirling engines and rotary vane pistonless air engines can be silent. this is a four seater cabin with reclined position and can be used as unmanned vehicle for valuable cargo transportation as pharmaceutics or disaster relief. there are some reasons and sources behind this setup.

this is an STOL, however to reduce reliance from infrastructure there's the possibility of make it VTOL by changing the propellers placement and by using pneumatic actuators moving the propellers from 90º in the few seconds of hoovering for take off and landing to 0º in climbing and cruising mode, and also can be made a seaplane by modifying the fuselage shape.

push propellers are less efficient but give stability to tailless aircrafts.

mini fresnel lenses are a recent possibility due to developments in tracking-less solar concentration, for example this paper "Solar concentrator based multipurpose sunlight harvesting system without tracking 2019"

isothermal air technology comes from recent ICAES storage plants publications. it can use molten salt or soy wax as heat storage to heat the air when is released from the tanks trough a heat exchanger system, some fresnel lenses can be used to reheat that molten salt or soy wax.

the aircraft can be built with fiber reinforced recycled or bio thermoplastics as well with biobased carbon fiber and bioepoxy (as well recyclamine hardening) using diy additive manufacturing techniques as braiding for the tanks, cnc tape layering for the skin and fiber reinforced 3d printing and post printing cnc milling for accurate parts using recycled nylon for example and all those machines can be built diy. on the other hand salt annealing of thermoplastics is a curing process that increases the strength necessary for aerospace use.

thermoplastic fiber reinforced air tanks are being developed for hydrogen cars, in case of collision they puncture releasing the air. the air tanks can be made meters long used as structural wing spars.

the ducted propellers could be retracted and the stirling engines could power 4 isothermal compressors in multistage connection using intercooler feed with high altitude cold air to refill the tanks and extend range, so the plane can fly in gliding mode to extend range or fly during the night.

to reduce the weight further the wings can be made with tensairity (already published) or inflatables inside using tensairity concept that is used for emergency bridges.

the airfoil shape and twist comes from nasa prandrl-m that has 53:1 glide ratio or L/d ratio and the overall shape is similar to lauk cygnus with 50:1 l/d ratio.

the counterwise propeller to counter the wing tip vortice comes from nasa DEP electric aircraft x-57.

distributed propulsion with ducted propeller array comes from "Aerodynamic Performance and Interaction Effects of Circular and Square Ducted Propellers 2020".

boundary layer ingestion comes from "A Review of Distributed Electric Propulsion Concepts for Air Vehicle Technology 2018".

45 degree rudders come from several recent uav research.

tensegrity morphing elevons comes from several scientific papers.

morphing study in aircrafts comes from darpa smart wing program and other papers.

c-wing comes from "Investigation and Design of a C-Wing Passenger Aircraft 2016".
 
Last edited:

Dan Thomas

Well-Known Member
Joined
Sep 17, 2008
Messages
6,234
this plane has had a good reception reddit, mostly for the energy source
This plane is nothing but vaporware. Nothing but electrons moving around in a computer. It's nothing but some guy's ideas. Nothing at all. Not even a mockup. No more than the drawings of fanciful aircraft we used to see in 1960s Popular Mechanics magazines. Nothing more than wishful thinking. Nothing but a scam. A fantasy.

Can't you find something that is REAL? Something that actually exists and is actually happening and is proving itself? And who on Redditt is an aviation engineering expert?
 

fizzle

Banned
Joined
Aug 24, 2021
Messages
122
And you can’t build it in your garage.
yes you can build easily this plane in a garage shop, you can build stirling engines and vane motors with a cnc milling machine, however there's some "inconvenience" in building a reliable multipart piston ICE engine or batteries in your garage and they cost a lot of money.
 
Last edited:

fizzle

Banned
Joined
Aug 24, 2021
Messages
122
This plane is nothing but vaporware. Nothing but electrons moving around in a computer. It's nothing but some guy's ideas. Nothing at all. Not even a mockup. No more than the drawings of fanciful aircraft we used to see in 1960s Popular Mechanics magazines. Nothing more than wishful thinking. Nothing but a scam. A fantasy.

Can't you find something that is REAL? Something that actually exists and is actually happening and is proving itself? And who on Redditt is an aviation engineering expert?
all this technology has been already developed by scientists, i can attach you all the scientific publications accepted by the international scientific community, there's no marketing here nor any single reference to a private company.
 

Dan Thomas

Well-Known Member
Joined
Sep 17, 2008
Messages
6,234
all this technology has been already developed by scientists, i can attach you all the scientific publications accepted by the international scientific community, there's no marketing here nor any single reference to a private company.
And there is no airplane using those technologies as you have shown. None. It's one thing to come up with individual theoretical components, and another entirely to assemble them into an aircraft and have them all work.

Airplanes need large amounts of power to fly. There's no getting around that. Cars get by with a lot less. Any airplane powered by solar is necessarily extremely light and therefore lightly built and can't carry much of anything other than itself. It's not a practical homebuilt. Not even for one small pilot.

This thing uses existing technology too. The Ion Drive. But the Ion Drive has so little thrust that stuff like this was the same sort of fantasy/scam/vaporware that you're putting up here.

1631289878768.png

That magazine was from August 1964. 57 years ago already. How many of those things have you seen flying around? But it's real science, published in real papers, tested using a balsa-frame model fed by a long, high-voltage cord. Like I said, getting such ideas to actually fly practically is something else altogether.
 
Last edited:

BJC

Well-Known Member
HBA Supporter
Joined
Oct 7, 2013
Messages
13,720
Location
97FL, Florida, USA
this plane has had a good reception reddit
this type of aircraft could be used thetered to a balloon
this is a high efficient airplane which can increase flying over the sea by using the ground effect,
this is an STOL
there's the possibility of make it VTOL by changing the propellers placement and by using pneumatic actuators moving the propellers from 90º in the few seconds of hoovering for take off
push propellers are less efficient but give stability to tailless aircrafts.
isothermal air technology comes from recent ICAES storage plants publications. it can use molten salt or soy wax as heat storage to heat the air when is released from the tanks trough a heat exchanger system, some fresnel lenses can be used to reheat that molten salt or soy wax.
salt annealing of thermoplastics is a curing process that increases the strength necessary for aerospace use.
the ducted propellers could be retracted
the stirling engines could power 4 isothermal compressors in multistage connection using intercooler feed with high altitude cold air to refill the tanks
distributed propulsion with ducted propeller array
the counterwise propeller to counter the wing tip vortice
45 degree rudders
****, amur, that is amazing. When do you start construction?


BJC
 

fizzle

Banned
Joined
Aug 24, 2021
Messages
122
And there is no airplane using those technologies as you have shown. None. It's one thing to come up with individual theoretical components, and another entirely to assemble them into an aircraft and have them all work.

Airplanes need large amounts of power to fly. There's no getting around that. Cars get by with a lot less. Any airplane powered by solar is necessarily extremely light and therefore lightly built and can't carry much of anything other than itself. It's not a practical homebuilt. Not even for one small pilot.

This thing uses existing technology too. The Ion Drive. But the Ion Drive has so little thrust that stuff like this was the same sort of fantasy/scam/vaporware that you're putting up here.

That magazine was from August 1964. 57 years ago already. How many of those things have you seen flying around? But it's real science, published in real papers, tested using a balsa-frame model fed by a long, high-voltage cord. Like I said, getting such ideas to actually fly practically is something else altogether.
that reasoning is like saying you cannot use batteries in a plane or even an ICE engine because nobody has build it, it's the same illiterate rants of the early 1900s and yes fresnel lenses with stirling efficiency has been proven by several accepted scientific papers and also there are trackless fresnel lenses designs.

so yes it's a proven technology.
 

llemon

Well-Known Member
Joined
Apr 29, 2021
Messages
62
that reasoning is like saying you cannot use batteries in a plane or even an ICE engine because nobody has build it, it's the same illiterate rants of the early 1900s and yes fresnel lenses with stirling efficiency has been proven by several accepted scientific papers and also there are trackless fresnel lenses designs.

so yes it's a proven technology.
Working in a lab = practical in the real world

Some German in the late 1800s discovered liquid crystals. Then someone in the 1920s proposed a liquid crystal display. Then in the 1950s there were simple monochromatic liquid crystal displays. Then in the 1990s there were colored liquid crystal tvs you could actually buy.
 

fizzle

Banned
Joined
Aug 24, 2021
Messages
122
Working in a lab = practical in the real world

Some German in the late 1800s discovered liquid crystals. Then someone in the 1920s proposed a liquid crystal display. Then in the 1950s there were simple monochromatic liquid crystal displays. Then in the 1990s there were colored liquid crystal tvs you could actually buy.
let's saying like this, in 1950 someone built an efficient stirling engine, in 2021 i can build the same efficient stirling engine or even improve it
 

Dan Thomas

Well-Known Member
Joined
Sep 17, 2008
Messages
6,234
let's saying like this, in 1950 someone built an efficient stirling engine, in 2021 i can build the same efficient stirling engine or even improve it
But nobody has built an efficient Stirling engine. Why don't you?

Edit: An efficient, LIGHT, powerful, Stirling engine. Aircraft piston engines produce around 0.5 HP per pound. You're very unlikely to come anywhere close to that and you sure aren't going to do it with sunlight.
 
Last edited:

Dan Thomas

Well-Known Member
Joined
Sep 17, 2008
Messages
6,234
that reasoning is like saying you cannot use batteries in a plane or even an ICE engine because nobody has build it, it's the same illiterate rants of the early 1900s and yes fresnel lenses with stirling efficiency has been proven by several accepted scientific papers and also there are trackless fresnel lenses designs.

so yes it's a proven technology.
Fresnel lenses are still limited by the wattage per square foot, just like solar panels. They don't suck in sunlight from wide angles. The sun has a small arc at 93 millions miles, and nothing is going to make it any bigger.

Fresnel lenses have been used since around 1800. 200 years or more. They are nothing new. I used to look after runway and taxiway lighting, and those lights use Fresnel lenses to direct the light in specified patterns. They don't make the light.
 

jedi

Well-Known Member
Joined
Aug 8, 2009
Messages
2,649
Location
Sahuarita Arizona, Renton Washington, USA
fizzle


I like the the concept of "Tensegrity morphing twisting wing, less flutter tweak drag and lift." and would like to review your development on the subject and assist with your implementation as able.

I am encouraged that the prior posts do not indicate problems with this concept for development of the design.

Additional comments are solicited.
 
Status
Not open for further replies.
Top