Let’s start to determine that mode will be most dangerous rather than how and where to steer twin model in difference situations. You should avoid this mode or minimize time when model is in this dangerous mode. Return to follows charts one’s more.
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The most dangerous mode is when engines on full throttle, model is slow, low and far.
When model is slow and engines have high RPM the significant part of lift consists from propeller’s airflow. If the airflow disappears we will have the much misbalance on wing halves. The model may turn over.If your model low in this situation you will not have time for recovery. The time to recovery is shorter in case of single engine model because remaining running engine will accelerate speed of fall. The aggravating circumstance will be turn model to dead side. In this case running wings half will be moving through long radius with higher speed. The dead half will be moving through short radius with lower speed. This fact increases disbalance lift additionally. If model is rather far it will be difficult to control model in any situation and especially in dangerous one. If you collect these entire bad factors you almost will not have a chance to save the model. Image that you have model is installed on two supports, one under each half of wing. It is sum of lift. Punch out one support. The model will fall down.
What do you do in order to avoid this situation? Nothing unusual. It will be enough don’t bring together all this factors. If you low - fly fast. If you want slowly – do it high. If you want low, slow do it close to you, even in this badly you will have a chance to save model. Is it difficult? No.
The control of engines is the main attribute of safety flying twin models.
The control has to be smoothly. No sudden movements, slow movements on throttle
slick only. Of course you should move the stick slowly on single engine also but
in case of twin it’s especially important. It is sound strange but for multi
tanginess model it is not so important, but I recommend to move stick slowly on
any model. How situation will able to follow if you disregard my recommendation.
You manage throttle stick fast.
It will be 100% crash if you are in the most dangerous mode.
In this point I would like to recommend returning to place engine’s article and through look ones more my recommendation regarding select engines. The working engine will destroy model than engine powerfully whereby falling will be faster, time to save model shorter and model will be more destroyed.
It isn’t possible to be equally attentively all time during fly. The maximum attentively should be when model is most dangerous mode.
It’s almost everything what you should know for safety flying twin or multi engine models. There are very few advises for different parts of flight.
The model has to have maximum speed before lift-off. If model isn’t fast it will be most dangerous position just after lift-off. Low, slow and far.
Take off should be slow and scale. Such take off looks better and is safety.
Speed and speed once more. The speed is the key to safety flying. All manoeuvres have to be in speed, turns especially. If you manoeuver take low speed and high RPM do it close to you on high one or two mistakes. Avoid doing such manoeuvers low. In this case you don’t have a chance to save model. The peak attention has to be. You must clear know what you will do if one engine stops.
Let's start with approaching. You have to fly pretty far, model can be low. The situation is close to most dangerous mode. How go out far from most dangerous position? It’s simple – plan you approach without using throttle. Engine’s should be on idle or close to idle. What do you do to make such approach? Landing pattern should be done as dead stick landing. Use little movements on throttle stick only to make small correction. The flying speed has to be maintained with descent of model. With such type of flying you can look that one engine stops close to you when you see stopped propeller. You will not any banks or turns. Such landing is not emergent because everything happens as normal landing.
Flare is very simple. Wing has additional air flow from propeller, ailerons are working effectively. To stall model is difficult. You can meet one problem only. It’s rudder. The efficiency may be low and it will lower as lower speed. You have to be ready for this.
Let’s determine main rules for safety flying twin and multi:
I think it everything that you should know. As you can see it is nothing difficult or supernatural. I think moderate level pilot can handle twin model safety if he follows my recommendations.
I believe you can develop scenario actions in case one engine stops yourself. Anyway I strongly recommend reading another articles. Perhaps you will know something new, unexpected and unknown.