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Fire and Aviation

If It's Not Diluted, Retardant Can Unseat SEATS

Photo of the cover page of the Aviation Management Tech Tip, Retardant Mixers for SEAT Bases.Undiluted wet concentrate retardant is heavier than the diluted retardant. If an aircraft is accidentally loaded with undiluted wet concentrate retardant, the additional weight (up to 1,500 pounds), could damage the aircraft or cause it to crash.

Single engine airtankers (SEATs) are often used for fire suppression in rural areas without airtanker bases. Retardant mixing and loading equipment is portable and can be transported by a light-duty truck and trailer. Wet concentrate retardants only require dilution with water, so mixing and preparation time is minimal.

"Retardant Mixers for SEAT Bases" (0657–1301P–SDTDC) describes how a potentially dangerous situation can be eliminated. SDTDC developed a single pump blending system that is ideal for SEAT operations: it eliminates the safety risk and reduces operational costs.

For further information, contact Joe Fleming, project leader (phone: 909–599–1267; ext. 263; e-mail:

To order the tech tip, contact SDTDC publications (phone: 909–599–1267, ext. 235; email;

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