Impossible for 100 years!
SunPlower Propeller technology is similar to the 100-year-old forgotten propeller concept: Kirsten Boeing Propeller (KBP) by German Professor: Frederick Kurt Kirsten. Even though it was the most efficient propulsion technology, it was not adopted due to the huge hub size (non-scalable), and also it is not optimal for a small RPM range of ICE engines. These are the 2 main reasons (huge hub & need for wide RPM engine) why this efficient propulsion was forgotten and ignored for 100 years.
KBP @ NASA TRS: https://ntrs.nasa.gov/search.jsp?R=19930090732
Recently the University of Siegen in NRW Germany has developed the same old large hub non-scalable KBP for hydropower generation, it's a 4 years govt and EU-funded R&D project StECon!!
Uni-Siegen tried very hard to reduce the large hub size (see the image) to a certain extent, however, it was challenging to place all those mechanisms at the zero radius point of a cone to make it ultra-compact and scalable! Many people still think it is impossible to make the hub smaller than that even today!
SunPlower Propeller is the world’s first (PCT patent filed) to make this in a compact and scalable hub (impossible for 100 years). KBP is more efficient than screw propellers and far more efficient and older than Voith Schneider Propeller (VSP). Its runs at a much lower RPM (lower noise) than any other propeller.
ICE engines are optimal for a small range of RPM, and cannot start under load - clutches and gearboxes (eliminated in EVs) are used for decoupling starting load and also for variable RPM/torque in automobiles. In aviation, shipping & marine industries, the variable pitch propellers were used to run at ICE's optimal RPM without clutches and gearboxes (VSP was developed for ICE engines - in spite of its low efficiency and high complexity).
The father of helicopter technology is VSP, many experts are not aware that KBP is the grandfather of helicopter technology/Thrust Vectoring technology from the 1920s.
Now with electric motors (wide RPM range), we can not only eliminate the need for variable pitch propellers but also eliminate the need for complex swashplates (stress plates) in Helicopters (blades in the circular path) and also in VSP (blades in the cylinder path) for "Thrust Vectoring".
SunPlower Propeller Technology is the world's first compact scalable 2-D directional thrust propeller.
SunPlower Propeller blades push the fluid (air/water) similar to birds and fishes (no fluid screwing like screw propellers). This creates less turbulence, which makes this low noise technology optimal for UAM and also optimal for stealth mode military planes and submarines.
Wondering how this puzzle was solved!! (Ingenuity in hub size reduction)
𝗧𝗵𝗲 𝘀𝗲𝗰𝗿𝗲𝘁 𝗶𝘀:
𝗖𝗢𝗿 / 𝗖𝗢𝗻 = 𝟭 ± ( 𝟭/𝟮) * (𝗦𝗿𝗼𝘁 / 𝗦𝗿)
Covers all possible 𝗰𝗼𝗻𝗳𝗶𝗴𝘂𝗿𝗮𝘁𝗶𝗼𝗻𝘀 𝗮𝗻𝗱 𝗿𝗮𝘁𝗶𝗼𝘀 for multiple use cases/applications.
International Patent Application and corresponding documents:
World's First Compact Directional Thrust propeller:
During Vertical take-off/landing air is pushed down, providing vertical thrust. Blade's pitch direction is changed to change the direction of thrust. Allowing quick switch to horizontal thrust mode for fast flight. Thrust vectoring with no hinges & swash plates! It's a very simple 1D control, with no thrust load on the directional thrust control mechanism to rotate the blades. Enclosed in the hub - eliminating any failures related to environmental contamination for mission-critical applications.
Why Mobile Tower operators want this technology now?
Half of the world has no internet, due to the lack of a grid or stable grid. They run on diesel generators, which is polluting the environment and also very expensive (50-70 ct/hr).
Solar is dirt cheap, but cleaning dirt on solar panels is very expensive. SunPlower Propeller is the world's first self-cleaning & self-cooling blades (watch video). It's still economical to run flexible solar panels on blades (always half of the area of the blade is exposed to direct sunlight, rest indirect light) which eliminates the solar tracker and also reduces maintenance cost.
Existing wind turbines wasted drag/thrust force on the mast is huge, and it's challenging and more expensive to mount it in an optimal configuration. SunPlower propeller uses both lift and drag (relatively less force on the mast, close to the base) and it has the smallest footprint and almost no clearance to the base requirements. Depending on the site requirements, operators are willing to choose either an independent mast or strengthen the mobile tower mast to add SunPlower propeller.
Customers don't care much about efficiency (+/-5%), they care for the value added by SunPlower propeller, which is solving the problem effectively, saving more than 50% of Installation & masts cost.
Wind Turbine Applications:
Building roofs, corners, mountain slopes
Mobile phone tower power
Remote power for highways & agriculture
Small & Medium scale industry
Scalable to Off-shore turbines with supporting strings
Other SunPlower Propeller Applications:
Tidal/Hydro (without a dam)
Kite power generation
Boats, Ships, and Submarines