rc-whirlybird
Senior Heliman
Location: Shelby Twp, Michigan,USA
My Posts This: Topic Forum | I flew it to day with happpy power.
I have some PM asking me how to do this modify.
Here is what I did on mine.
-With the clutch bell I pull out the lower bearing and replace with the brass brush, I made one 10x14x4 by myself. If you can turn down the OS91 shaft to 8mm and use the stock clutch bell bearing.
   
-I make the sharp step down on the engine shaft, add the space to support the upper clutch bell bearing. This space is grind to the right amount, so that when install the clutchbell on the shaft is has little space about 1/4mm between the brush and front engine bearing. I insert the space on the wood stick for easy handle and grind bit by bit until I got the right amount.
 
 
-I got the clutch/bell in place, the nut will tigh and hold the shoe like this.
 
-With the fan will not hold by the engine nut, it attach independent with the shoe via two 5mm bolt.
First I attach the clutch shoe and fan on the HLG engine the get it bolt on together. I drill two new hole on the fan inline with the two 5mm hole on the clutchshoe. I make the center fan hole is large and the engine nut can go through.
       
The parts must have is;
-The 13T clutch bell
-The clutch shoe is ok with the L or R because the OS91c-spec is high rpm engine.
-Left hand cooling fan L503
-Left hand shroud L331
-Main shaft oneway clutch L0418 (I have the R0418 and just reverse the oneway bearing in it)
*Reverse the tail direction too.
Hope all info above can help someone interest to do the same.
Tuan |
