clestudentpilot
Well-Known Member
Hey guys, I just post questions in another thread regarding a Cherokee B 180, which led me to ask a few questions on calibrated airspeed. The POH for this airplane does not say whether the speeds listed are IAS, or CAS. What would you think this means? The POH also does not have any conversion for CAS to IAS, so I don't even know what I would do to convert anyway.
My second question is in regards to the white arc, compared to IAS and CAS. In the Archer that I fly, the POH say that Vs0 is 61 MPH, and it specifies that this is a CAS. The white arc also bottoms out at 61 MPH. Using the conversion chart with 40 degrees of flaps, 61 MPH CAS=54 MPH IAS. Shouldn't the white arc bottom out at 54 MPH on the airspeed indicator, since that is IAS. I am confused my this, and don't know what to think.
Any help is appreciated!
My second question is in regards to the white arc, compared to IAS and CAS. In the Archer that I fly, the POH say that Vs0 is 61 MPH, and it specifies that this is a CAS. The white arc also bottoms out at 61 MPH. Using the conversion chart with 40 degrees of flaps, 61 MPH CAS=54 MPH IAS. Shouldn't the white arc bottom out at 54 MPH on the airspeed indicator, since that is IAS. I am confused my this, and don't know what to think.
Any help is appreciated!