Final answer:
Most radial engine spark plug wires are connected to the distributor block using a specific firing order.
Step-by-step explanation:
In most radial engine designs, the spark plug wires are connected to the distributor block using a specific firing order. The firing order determines the sequence in which the spark plugs will fire and ignite the air-fuel mixture in the engine cylinders. Each spark plug wire is connected to the distributor cap at a specific position, corresponding to the firing order.
For example, in a 9-cylinder radial engine, the firing order might be 1-6-3-8-5-2-7-4-9. The spark plug wires would then be connected to the distributor block in the same order.
This ensures that each spark plug receives the electrical spark at the correct time, leading to efficient combustion and smooth engine operation.