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May 13, 1969

                H. P. Bruns                 Special Vehicle Dev.     Engineering Office                 Highland Park

                W. P. Wright                S&M Engineering          Space                              Huntsville

                Competition Control Center Mobile Van Communications System









                          The attached IPA represents the additional costs to expand the race car
                driver to pit crew communications system to include the mobile control center and
                three additional pit areas (making a total of four links from mobile control center
                to pits and one pit to one car link).

                          The system is designed to allow the mobile control center to act as the
                central control. The control center can monitor (receive) all cars and pits
                simultaneously but can transmit only to pits (the system can be modified if desired
                to transmit to cars). The pit receivers are tone controlled so that each pit re­
                ceives only the transmission directed to an individual pit. Similarly the cars
                receive only the transmission from that car's pit.

                         All transmitters and receivers will be equipped with a 25 tone combination
                scrambler. The scrambler code can be selectively changed from event to event as
                per the unit supplied and can be modified easily to allow special scrambling com­
                binations.

                         This system with the dual frequency allocation provides the maximum
                security and driver safety believed available commercially at moderate cost.


                         This IPA work scope includes procurement of necessary hardware and
                interface electronics to equip three pit areas and a control center with a communi­
                cations network, assemble, install, and check out the equipment and brief operating
                personnel.

                         The system can be expanded to include 25 pits and 25 cars within the dual
                frequency requested.





                                                                                                         X
                                                                                 W. P. Wright

                WPW:ck

                cc:      •  J. Rathgeb
                        o r  •   M. Wallace

                      H. Bader, Jr.
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