HAWK Build - Clutch ?

[theLane]

Hi all,

My first nitro build and I am not familiar with how the clutch works. It's all together right, based on the book, but I am wondering, how does the clutch grab the liner and turn the rotor?

If I spin the main gear with my finger, should the motor be turning over or not? I don't believe there is a oneway bearing in this Hawk Pro.


Thanks,
Lane

[ArthurKnowles]

if you look at the clutch you will see it has two cuts that seperate the unit into three distinct parts. The two outer pieces will expand under centrifical force and engae the clutch bell as the motor RPMs increase.

Since turning the rotor only turn the outer clutch bell the inner clutch will not turn. So the motor does not turn either.

PS: There is a one-way bearing on the main shaft (in the main gear) so you can auto-rotate. But there is no one-way on the clutch. It uses a spring loaded dog-bone to connect when starting.

[theLane]

Got it... thanks. Initially, when I put it together, turning the main gear did turn over the motor, but after several rotations with my finger, the motor no longer turns over. Must have been because it was new.

Another question/problem I am having is with the tail control arm. This control wire is NOT easy to slide back and forth. Comparing it to my Logo and Corona, this wire is stiff!

How is everyone doing this? Are you just fiddling with the hoops until it's as easy as it gets and then letting the servo work it or are you replacing the wire with something else?


Thanks for the help,
Lane

[ArthurKnowles]

I noticed this same problem on my Hawk Pro. On mine it meant the hoop closest to the servo was too close. In the manual it states not all hoops will be needed and that clued me in to the fact that I should move the hoop furhter away so it didn't put tension on the wire.

When you get the hoops to your satisfaction, either put some tape for and aft or glue them in place with a bit of CA to prevent them from moving. If it tightens up in flight, you could crash.

You could also buy the CF tail rod. I have that and the Hawk Sport conversion kit so I can put the tail servo up front. Mine is going in a Bell 222 fuse, so I don't know which will be a better choice until I get further along with the build. Right now I am just flying th emechnics to sort things out.

Oh, before I forget. You should also notice that the wire at the tail must be orientated so the bend is directly under the tail boom and attaches flush to the tail slider. This means your ball link must be perpendicular to the wire. The ball link that connect to the servo should be parallel to the tail boom (which means perpindicular to the tail slider link). That gives the freest movement.