ENGINE starting at low temperatures is difficult for the following reasons: (a) A cold engine requires higher torque to start it and thus imposes a greater load on the accumulator. This is not so marked with ball or roller bearings.
Woodfield, F.P.R. (1946), "Warming Aircraft Accumulators in Sub‐Zero Temperatures: A Proposal for the Better Care of Accumulators so that their Full Power is Available when Most Required", Aircraft Engineering and Aerospace Technology, Vol. 18 No. 5, pp. 160-162. https://doi.org/10.1108/eb031370
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