| A straight wing aeroplane always needs a Mach trimmer for flying at Mach numbers close to MMO |
| A Mach trimmer corrects the change in stick force stability of a swept wing aeroplane above a certain Mach number |
| The Mach trimmer corrects the natural tendency of a swept wing aeroplane to pitch-up |
| A Mach trimmer reduces the stick force stability of a straight wing aeroplane to zero at high Mach numbers |
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