L Edge
Master member
Goal: Build a EDF STOL that doesn't exist and is simple to build so anyone can fly.
Reviewing material, most builder's add flaps, leading edge devices, end plates, gyro, FC, etc. to their plane.
Thinking outside the box, why not have a power plant that rotates allowing the thrust components( horizontal for forward and vertical for up and down) to be variable for STOL and left level for forward flight? Now put this on the CG axis of the plane and it will work. Next, construct a fighter plane that doesn't have landing gear( I did a F22) and that is very light, add rotating EDF and you have a great STOL.
A side note: Found that some of the trapped airflow on takeoff under the plane increased the under surface pressure and lifted the plane partially vertical much like an air cushion vehicle.
Result:
Here is a lightly built F-22 that has the 64mm 5 bladed EDF rotated about 40 degrees up and when powered up, it rises slightly(air trapped under) and combined with the up thrust, gets into the air in less than 2 lengths of the plane. Just to show you repeatability, second launch I used about 30% angle and got a slightly longer run in the grass. Landings, how about that angle of attack?, has to be in the range of 35 to 45 degrees high alpha with no rocking, on final approach. EDF is protected sitting above so no damages with high AOA.
Interested in building one? I will show you what I did for setup, explain how I fly it and really anyone who wants to try it, can take a fighter and make it STOL.
Love to have someone with a 50 mm try it on a reduced size fighter.
Here is a view of setup.
Reviewing material, most builder's add flaps, leading edge devices, end plates, gyro, FC, etc. to their plane.
Thinking outside the box, why not have a power plant that rotates allowing the thrust components( horizontal for forward and vertical for up and down) to be variable for STOL and left level for forward flight? Now put this on the CG axis of the plane and it will work. Next, construct a fighter plane that doesn't have landing gear( I did a F22) and that is very light, add rotating EDF and you have a great STOL.
A side note: Found that some of the trapped airflow on takeoff under the plane increased the under surface pressure and lifted the plane partially vertical much like an air cushion vehicle.
Result:
Here is a lightly built F-22 that has the 64mm 5 bladed EDF rotated about 40 degrees up and when powered up, it rises slightly(air trapped under) and combined with the up thrust, gets into the air in less than 2 lengths of the plane. Just to show you repeatability, second launch I used about 30% angle and got a slightly longer run in the grass. Landings, how about that angle of attack?, has to be in the range of 35 to 45 degrees high alpha with no rocking, on final approach. EDF is protected sitting above so no damages with high AOA.
Interested in building one? I will show you what I did for setup, explain how I fly it and really anyone who wants to try it, can take a fighter and make it STOL.
Love to have someone with a 50 mm try it on a reduced size fighter.
Here is a view of setup.
![STOL.JPG STOL.JPG](https://ftforumx2.s3.amazonaws.com/2021/07/373374_c78f6d3e13c980104474260b055a623f.jpg)
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