Propeller actuate in two different stages, as an impulse and as a drag, when the prop is working in certain high RPMs it will surely works as an impulse propeller which will help to fly our models, in a different stage the same prop at low RPMs will work as a dragger, helping us to stop flying our models, the problem here resides on a proper tuning of the engine which in idle is still hauling the plane, of course using a less pitch prop will help, (running at the same RPMs with less thrust) but that is not an adequate solution. As I mentioned before the model should be tested in a paved runaway and when the engine is at idle the plane should stay motionless, meaning that the engine thrust at idle will not affect our landings. If the plane tends to move (using what ever pitch prop) it means that our idle should be verified because we will be flying the plane even at a landing attitude (which as same as in this case, will take a long way to bring down and stop the model). Some models like war birds need more airspeed to land and can have a higher than normal idle, but in sport models and pattern planes we will want to maintain them motionless at idle, so adjusting the LSNV is a must.