Smokey engine Spitfire departure at Duxford.

[@klassieker2834]

No, mixture must be rich on take-off. Misfiring cylinder?

[@ianstewartaviation2634]

Yes that's possible

[@ianstewartaviation2634]

Yes possibly I’m no expert. Reminds me of the dats we used to put Redex additives into our car fuel tanks and drive off down the road laying a smoke screen behind us😀

[@AirflowNZ]

Probably left rich mixture on in error?

[@TheFatNumpty]

Would it not be set that way normally? Why would it need to be leaned at ground level?

[@alexvanbreemen9083]

Smoke screen for ze sjermans.