F-22 Raptor Single 70mm EDF.

L Edge

Master member
triangle with sides.JPG


Did some static testing where I designed a circular to rectangle exhaust with the triangle(top and bottom exhaust and 9" length) shape. The unit weighs 63.4 grams

Charged up battery where each pack is 4.2000V and then held it vertically and added throttle until it hovered by itself(quick let go and grab). It took 87-88% throttle to get it to hover with 2 try's where I back off to 50% and came up again.
Then charged battery to again 4.200 with unit off and it hovered at 76-75%.

I know there is a small additional thrust/wt. to hover, but I was quite surprised that much throttle. I did some testing on my SR-71(different lengths of inlet and outlet circular tubing) and % changes were small. Even explored nose cone area.

Also, I am going for dynamic runs to see with triangular exit shape, what flow pattern it produces when mixed with airflow and what it does. I am also changing exit shapes to see how it effects the pitch. This adds knowledge to the proper design of NYGAD planes.
 

noahangel11

Elite member
F22 Raptor 70MM Twin EDF DTFB RC Plane

John Flach (RC Skunkworks)

Specifications
  • Length: 1320mm (~52”)
  • Wingspan: (954.4mm (~37.5”)
Electronics
Power:
Batteries:
  • QTY-2 3-Cell 4000 mah Lipo batteries wired in Series for 6S (A 63s pack will not fit in fuselage)
Servos:
  • QTY-4 17G Servos
Receiver:
  • 4 channel Minimum
Materials
Full Plans:
https://drive.google.com/drive/folders/1SZV9FdDes3sXX5H1RKTeZ5I_C5yr4ORD?usp=sharing

Tiled Plans:
https://drive.google.com/drive/folders/1QjG7GbacU4To4w-Ij-zkMleBEZMtplEt?usp=sharing

Assembly instructions:
https://drive.google.com/file/d/1GkbtIE_s9gMr2xEe8IzO__gKtQwhIpz6/view?usp=sharing
 

Houndpup Rc

Legendary member
F22 Raptor 70MM Twin EDF DTFB RC Plane

John Flach (RC Skunkworks)

Specifications
  • Length: 1320mm (~52”)
  • Wingspan: (954.4mm (~37.5”)
Electronics
Power:
Batteries:
  • QTY-2 3-Cell 4000 mah Lipo batteries wired in Series for 6S (A 63s pack will not fit in fuselage)
Servos:
  • QTY-4 17G Servos
Receiver:
  • 4 channel Minimum
Materials
Full Plans:
https://drive.google.com/drive/folders/1SZV9FdDes3sXX5H1RKTeZ5I_C5yr4ORD?usp=sharing

Tiled Plans:
https://drive.google.com/drive/folders/1QjG7GbacU4To4w-Ij-zkMleBEZMtplEt?usp=sharing

Assembly instructions:
https://drive.google.com/file/d/1GkbtIE_s9gMr2xEe8IzO__gKtQwhIpz6/view?usp=sharing
Cool! Are you going to build it again and get us a flight video?