A VERY rich air/fuel mixture. Also if you notice, he stays near peak rpm for a long time (9 seconds in the video!), meaning heaps of unburnt fuel is going through and it ignites after he lifts off meaning BBQ!!
A VERY rich air/fuel mixture. Also if you notice, he stays near peak rpm for a long time (9 seconds in the video!), meaning heaps of unburnt fuel is going through and it ignites after he lifts off meaning BBQ!!
A VERY rich air/fuel mixture. Also if you notice, he stays near peak rpm for a long time (9 seconds in the video!), meaning heaps of unburnt fuel is going through and it ignites after he lifts off meaning BBQ!!