I like seeing my old planes being appreciated, nice images BTW!
If you want to experience how the old, twin row rotary engines were flown, bring up the fuel and payload menuette, and click the square in Fuel to hide the little 'X' within, which will cut the fuel supply to the engine, acting like an ignition 'coup' switch.
The rotating mass of the engine will spool down in rpm slowly, then re-click the 'X' box again, the engine spools up again, repeat as needed to slow down and land. This is how old single speed rotaries were speed controlled. Don't slow down too much as the HF-22 has a terrible glide slope and will stall and plummet if you try to level out without engine power below 40~35 Knots.