Is the ratio fairly constant across aircraft types, sizes and powerplants?
I'd like to ignore the reverse thrust component, since that's not available at the same time as forward thrust.
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Sign up to join this communityIs the ratio fairly constant across aircraft types, sizes and powerplants?
I'd like to ignore the reverse thrust component, since that's not available at the same time as forward thrust.
If we assume that the braking system is designed to leave no unused braking capacity, the maximum braking deceleration is determined by the friction coefficient of the tyres. This NASA report gives a friction coefficient of around 0.5, for dry concrete with a functioning anti-skid system. This results in maximum braking deceleration of 0.5 g, around 5 $m/s^2$
A typical maximum thrust acceleration would occur for a typical airliner, at TO thrust, and medium range TO weight. Let's take typical numbers for an A320:
So across the board, the braking-to-thrust force ratio is around 5/3.3 = 1.5.