Slide Rule Style Flight Computer

A slide rule style flight computer comprising:

• A flight computer including a front disc comprising of a front disc containing a front base disc and a front rotary disc rotatably fixed on the front base disc and a back disc containing a back base disc and a back rotary disc rotatably fixed on the back base disc, both of which are connected and fixed by positioning clips comprising of a left positioning clip and a right positioning clip with both upper sides connected and fixed with a bottom side of the said front base disc and with both bottom sides connected and fixed with a upper side of the said back base disc, wherein a plug-in card clip arranged and respectively connected with the left positioning clip and the right positioning clip can be pulled, inserted and moved between the left positioning clip and the right positioning clip and between the front base disc and the back base disc.