What is the reference chord for the two element airfoil ?

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Mohamed Sayed

Hi Abdelrahman,

The reference chord length of such case is the main element chord lenegth (1m in your case) and all the non-dimensional characterstics are based on this value.

Attached also a paper ( a bit old) that moght help you

I hope that would help you

Best regards

Mohamed

Abdelrahman Ibrahim Yousry

Thank you sir

Nils Beck

Typically the reference chord is the chord of the clean profile with all high lift devices retracted