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Design help for ducted fan

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Design help for ducted fan

Old 02-25-2020, 07:59 AM
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Default Design help for ducted fan

I fly turbine jets, helping out a patient who is a mechanical engineering student doing a project. He plans to make a small F-22 powered by two ducted fans. Can anyone help answering these questions?Here are my questions about our Carbon Fiber & 3D Printed RC F-22:
  1. We are doing two EDF units and I’m not 100% sure how to calculate the intake area and the exit area for the ducting. I do know the thrust of the unit and I know the FSA; I also know that most people say to use “110%*FSA” for the intake and “90%*FSA” for the exhaust. I am on the path to estimating efficiency based on intake area, speed, and other assumed values but it would be wonderful if there was a better equation where I can input speed and a thrust value to get the intake and exhaust areas. Any thoughts?
  2. What wing profile do you suggest we use for our size plane (36” X 27” X 10”) we are thinking of using a style of NACA series 4. Still poking around with that one though.

Any thoughts would be appreciated!

Old 02-27-2020, 05:13 AM
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Ducted fan calculator
→ fanCalc

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