Flying Control Section
1: Major Donovan and S/L Bompas attended experimental demonstrations of gasoline-burning fog-dispersal (FIDO) equipment on two Continental airfields Thesday and Wednesday. At one of these fields they witnessed a demonstration of the new American Ground Controlled Approach equipment, run by RAF personnel.
At Airfield A-75 (Cambrai/Epinoy, France. Emergency strip. PB) where the GCA equipment was demonstrated, a trial of so-called portable FIDO equipment was held. This equipment proved to be a somewhat inferior modification fo the permanent FIDO installations at certain RAF airfields in the UK.
Airstrips A-75 and A-74 (Cambrai/Niergnies, France. PB) were both testing small approach-lane gasoline-burning markers, but were found to be less advanced in their development of the equipment that is Kimbolton in its experiments along the same line.
9: Flying Control at Station 117 (Kimbolton. PB) has arrived at what is believed to be the best basic unit of layout for portable gasoline-burning approach-lane markers. Four 36-foot long pipes are laid out so that they converge to form an arrow at one end. This end points toward the runway, and the vapourizers on all four pipes are positioned so as to give the greatest intensity of light at this point. Major Donovan and S/L Bompas viewed it from the air and deemed this layout quite satisfactory in that it shows both direction and gives the maximum concentration of light.
A decision as to the number of these four-pipe units to be used and their distance/position from the end of the runway is still to be made. Flying Control has been requested to submit a detailed report of pilots reactions to the effectiveness of this equipment on the first occasion it is used under actual poor visibility conditions.
Col. Charles E Marion
DCS for Operations