Talk:Wright R-975 Whirlwind

Speed in M18 vs. M1

The WP article says the M18 has a top speed of up to 92 kph. WP also says the M1 max is 72 kph (although governed). Can the speed issue be clarified with other sources? MartinezMD (talk) 15:15, 30 April 2015 (UTC)

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"takeoff power"

Curious how the vehicle version has a "takeoff power" rating at all, but mostly I want to know how it can be rated at 25 extra horsepower at the exact same RPM. Where does the extra horsepower come from of not from a temporary increase in max RPMs? Also dubious about the previous one to be honest. All that power from 50 extra revs per minute? That's not even an extra rev power second. If it was a regular aircraft engine I would say they must be upping the boost, but the Continental didn't have a super charger 2600:1000:B103:C09E:0:16:F401:7601 (talk) 01:59, 6 December 2022 (UTC)

I think you may have misread, all instances of 'takeoff' that I can see relate to aircraft variants of the engine. Different power ratings at the same rpm will be varying supercharger boost pressures controlled directly by the pilot or an automatic system, higher pressures such as 'take-off' and 'War emergency power' were limited to short time period use because of the risk of engine damage. Nimbus (Cumulus nimbus floats by) 10:41, 6 December 2022 (UTC)