Yes the Thrust line will change and can change slightly.....The Type "A" mount is stiffer and has a bigger footprint....So it is suppose to allow for minimal thrust line changes. The problem is it will still change....


The best Hyde Mount for the Focus is an ARI mount....

The Lightweight ARI (A)...this gives you the weight of a normal AR nut supports the front bearing of the motor from the firewall....

If you grab a hold of the prop with the motor installed and can move it side to side and up and down...."IT WILL MOVE when running"

The reason is there is an extremely high amount of force applied to the mount from the gyroscopic effects of the prop turning. Pulls will require more right rudder...As in much more...depending on the amount of movement....Pushes will require large amounts of Left rudder and Throttling up and down on horizontal lines will result in YAW and Pitch changes.

How much change well.....depends on the amount of movement....

The Type "A" mounts are really good compared to nothing....But if your going to fly precision with it Use an ARI type in the Focus.....



Just my opinion I have been running Merle's mounts for a really long time.....And the Absolute best setup for weight and for maintaining constant thrust lines is the AR (A) the Aluminum beamed version is the lightweight one and the R is for the fuse mounted nose ring. This keeps everything aligned properly....The motor is not allowed to move at all other than the very little Flex that the airframe has in it.


Troy Newman